Daniel Orbist

Daniel Obrist

Researcher

College
College of Sciences
Department
Environmental Earth and Atmospheric Sciences, Climate Change Initiative
Phone
978-934-3988
Office
Olney Hall - 201
Links

Expertise

Environmental Pollution, Biogeochemical Cycles, Surface-Atmosphere Exchanges, Atmospheric Chemistry

Research Interests

Environmental Pollution, Biogeochemical Cycles, Surface-Atmosphere Exchanges, Atmospheric Chemistry

My research focuses on environmental chemistry and pollution, with a special emphasis on contaminants such as mercury, other trace metals, and persistent organic pollutants. I am interested in the behavior of these contaminants in terrestrial environments and watersheds as well as in their atmospheric chemistry and transport. I am also interested in greenhouse gas (CO2 and CH4) dynamics and how human perturbations and climate change affect terrestrial sinks and sources. My research is based on experimental field research and laboratory studies and combines methods from analytical chemistry, atmospheric chemistry and soil biogeochemistry, ecosystem ecology, and hydrology.

Education

  • Ph.D.: Hydrogeology, Graduate Program of Hydrologic Sciences, (2002), University of Nevada - Reno, NV
  • MS: Integrative Biology/Plant Ecology, Department of Biology, (1998), University of Basel - Basel, Switzerland

Biosketch

Prof. Daniel Obrist is a professor and former Chair of the Department of Environmental, Earth & Atmospheric Sciences at University of Massachusetts Lowell. He teaches focuses on Environmental Science, Biogeochemistry, and Environmental Pollution and Chemistry. His research aims to understand the fate of persistent pollutants and greenhouse gases in the environment . His research spans atmospheric chemistry, soil chemistry, and surface-atmospheric exchange studies. His studies have been extensively published in scientific journals including in Nature, Nature Geoscience, and PNAS.

Selected Publications

  • Wang T, Obrist D (2022). Inorganic and methylated mercury dynamics in estuarine water of a salt marsh in Massachusetts, USA. Environmental Pollution, 294, 118657.
  • Angot H, Rutkowski E, Sargent M, Wofsy SC, Hutyra LR, Howard D, Obrist D, Selin NE (2021). Atmospheric mercury sources in a coastal-urban environment: A case study in Boston, Massachusetts, USA. Environmental Science: Processes and Impacts
  • Zhou J, Obrist D (2021). Global Mercury Assimilation by Vegetation. Environmental Science and Technology, 55, 20, 14245–14257.
  • Dastoor A., et al. Arctic mercury cycling. Nature Reviews Earth and Environment, in press.
  • Obrist D, Roy EM, Harrison J, Kwong C, Munger JW, Moosmüller H, Romero C, Sun S, Zhou J, Commane R. Previously unaccounted atmospheric mercury deposition in a mid-latitude deciduous forest. Proceedings of the National Academy of Sciences of the United State of America, 118, 29 e2105477118
  • Zhou J, Obrist D, Dastoor A, Jiskra M, Ryjkov A. Vegetation uptake of mercury and impacts on global cycling. Nature Reviews Earth and Environment. doi.org/10.1038/s43017-021-00146-y, 2021.
  • Liu H-L, Zhou J, Li M, Obrist D, Wang X-Z, J Zhou. Chemical speciation of trace metals in atmospheric deposition and impacts on soil geochemistry and vegetable bioaccumulation near a large copper smelter in China. Journal of Hazardous Materials, 413, 125346, 2021.
  • Yang Y, Zhao Q, Dunham-Cheatham S, Adhikari D, Chen D, Poulson S, Patel A, Obrist D, Verburg P, Wang X, Roden E, Thompson A. Oxidation of Soil Organic Carbon during an Anaerobic-Aerobic Transition. Geoderma, Volume 377, 1, 114584, 2020.
  • Howard, D., Agnan, Y., Helmig, D., Yang, Y., Obrist, D. (2020). Environmental controls on ecosystem-scale cold season methane and carbon dioxide fluxes in an Arctic tundra ecosystem. Copernicus GmbH
  • Zhao, Q., Dunham-Cheatham, S., Adhikari, D., Chen, C., Patel, A., Poulson, S.R., Obrist, D., Verburg, P.S., Wang, X., Roden, E.R., Thompson, A., Yang, Y. (2020). Oxidation of soil organic carbon during an anoxic-oxic transition. Geoderma,377 114584.
  • Dunham-Cheatham, S.M., Zhao, Q., Obrist, D., Yang, Y. (2020). Unexpected mechanism for glucose-primed soil organic carbon mineralization under an anaerobic–aerobic transition. Geoderma,376 114535.
  • Sun, S., Ma, M., He, X., Obrist, D., Zhang, Q., Yin, X., Sun, T., Huang, J., Guo, J., Kang, S., Qin, D. (2020). Vegetation Mediated Mercury Flux and Atmospheric Mercury in the Alpine Permafrost Region of the Central Tibetan Plateau. Environmental Science & Technology,54(10) 6043-6052.
  • Khan, T.R., Obrist, D., Agnan, Y., Selin, N.E., Perlinger, J.A. (2019). Atmosphere-terrestrial exchange of gaseous elemental mercury: parameterization improvement through direct comparison with measured ecosystem fluxes. Environmental Science: Processes & Impacts,21(10) 1699-1712.
  • Wang, S., McNamara, S.M., Moore, C.W., Obrist, D., Steffen, A., Shepson, P.B., Staebler, R.M., Raso, A.R., Pratt, K.A. (2019). Direct detection of atmospheric atomic bromine leading to mercury and ozone depletion. Proceedings of the National Academy of Sciences,116(29) 14479-14484.
  • Jiskra, M., Sonke, J.E., Agnan, Y., Helmig, D., Obrist, D. (2019). Insights from mercury stable isotopes on terrestrial-atmosphere exchange of Hg(0) in the Arctic tundra. Biogeosciences Discussions, 1-19.
  • Jiskra, M., Sonke, J.E., Agnan, Y., Helmig, D., Obrist, D. (2019). Insights from mercury stable isotopes on terrestrial–atmosphere exchange of Hg(0) in the Arctic tundra. Biogeosciences,16(20) 4051-4064.
  • Pearson, C., Howard, D., Moore, C., Obrist, D. (2019). Mercury and trace metal wet deposition across five stations in Alaska: controlling factors, spatial patterns, and source regions. Atmospheric Chemistry and Physics,19(10) 6913-6929.
  • Osterwalder, S., Huang, J., Shetaya, W.H., Agnan, Y., Frossard, A., Frey, B., Alewell, C., Kretzschmar, R., Biester, H., Obrist, D. (2019). Mercury emission from industrially contaminated soils in relation to chemical, microbial, and meteorological factors. Environmental Pollution,250 944-952.
  • Olson, C.L., Jiskra, M., Sonke, J.E., Obrist, D. (2019). Mercury in tundra vegetation of Alaska: Spatial and temporal dynamics and stable isotope patterns. Science of The Total Environment,660 1502-1512.
  • Chen, C.Y., Driscoll, C.T., Eagles-Smith, C.A., Eckley, C.S., Gay, D.A., Hsu-Kim, H., Keane, S.E., Kirk, J.L., Mason, R.P., Obrist, D., Selin, H., Selin, N.E., Thompson, M.R. (2018). A Critical Time for Mercury Science to Inform Global Policy. Environmental Science & Technology,52(17) 9556-9561.
  • Obrist, D., Kirk, J.L., Zhang, L., Sunderland, E.M., Jiskra, M., Selin, N.E. (2018). A review of global environmental mercury processes in response to human and natural perturbations: Changes of emissions, climate, and land use. Ambio,47(2) 116-140.
  • Jiskra, M., Sonke, J.E., Obrist, D., Bieser, J., Ebinghaus, R., Myhre, C.L., Pfaffhuber, K.A., Wängberg, I., Kyllönen, K., Worthy, D., Martin, L.G., Labuschagne, C., Mkololo, T., Ramonet, M., Magand, O., Dommergue, A. (2018). A vegetation control on seasonal variations in global atmospheric mercury concentrations. Nature Geoscience,11(4) 244-250.
  • Olson, C., Jiskra, M., Biester, H., Chow, J., Obrist, D. (2018). Mercury in Active-Layer Tundra Soils of Alaska: Concentrations, Pools, Origins, and Spatial Distribution. Global Biogeochemical Cycles,32(7) 1058-1073.
  • Agnan, Y., Douglas, T.A., Helmig, D., Hueber, J., Obrist, D. (2018). Mercury in the Arctic tundra snowpack: temporal and spatial concentration patterns and trace gas exchanges. The Cryosphere,12(6) 1939-1956.
  • Zhao, Q., Adhikari, D., Huang, R., Patel, A., Wang, X., Tang, Y., Obrist, D., Roden, E.E., Yang, Y. (2017). Coupled dynamics of iron and iron-bound organic carbon in forest soils during anaerobic reduction. Chemical Geology,464 118-126.
  • Denzler, B., Bogdal, C., Henne, S., Obrist, D., Steinbacher, M., Hungerbühler, K. (2017). Inversion Approach to Validate Mercury Emissions Based on Background Air Monitoring at the High Altitude Research Station Jungfraujoch (3580 m). Environmental Science & Technology,51(5) 2846-2853.
  • Obrist, D., Agnan, Y., Jiskra, M., Olson, C.L., Colegrove, D.P., Hueber, J., Moore, C.W., Sonke, J.E., Helmig, D. (2017). Tundra uptake of atmospheric elemental mercury drives Arctic mercury pollution. Nature,547(7662) 201-204.
  • Obrist, D., Pearson, C., Webster, J., Kane, T., Lin, C., Aiken, G.R., Alpers, C.N. (2016). A synthesis of terrestrial mercury in the western United States: Spatial distribution defined by land cover and plant productivity. The Science of the Total Environment, 522.
  • Zhao, Q., Adhikari, D., Huang, R., Patel, A., Wang, X., Tang, Y., Obrist, D., Roden, E.E., Yang, Y. (2016). Coupled dynamics of iron and iron-bound organic carbon in forest soils during anaerobic reduction. Chemical Geology.
  • Webster, J.P., Kane, T.J., Obrist, D., Ryan, J.N., Aiken, G.R. (2016). Estimating mercury emissions resulting from wildfire in forests of the Western United States. Science of the Total Environment,568 578 - 586.
  • Zhao, Q., Poulson, S.R., Obrist, D., Sumaila, S., Dynes, J.J., McBeth, J.M., Yang, Y. (2016). Iron-bound organic carbon in forest soils: quantification and characterization. Biogeosciences, (16).
  • Perlinger, J.A., Gorman, H.S., Norman, E.S., Obrist, D., Selin, N.E., Urban, N.R., Wu, S. (2016). Measurement and modeling of atmosphere-surface exchangeable pollutants (ASEPs) to better understand their environmental cycling and planetary boundaries. Environmental Science and Technology,50(17) 8932 - 8934.
  • Eagles-Smith, C.A., Wiener, J.G., Eckley, C.S., Willacker, J.J., Evers, D.C., Marvin-DiPasquale, M., Obrist, D., Fleck, J.A., Aiken, G.R., Lepak, J.M., Jackson, A.K., Webster, J.P., Stewart, A.R., Davis, J.A., Alpers, C.N., Ackerman, J.T. (2016). Mercury in western North America: A synthesis of environmental contamination, fluxes, bioaccumulation, and risk to fish and wildlife. Science of the Total Environment,568 1213 - 1226.
  • Zheng, W., Obrist, D., Weis, D., Bergquist, B.A. (2016). Mercury isotope compositions across North American forests. Global Biogeochemical Cycles,30(10) 1475.
  • Agnan, Y., Le Dantec, T., Moore, C.W., Edwards, G.C., Obrist, D. (2016). New Constraints on Terrestrial Surface-Atmosphere Fluxes of Gaseous Elemental Mercury Using a Global Database. Environmental Science and Technology,50(2) 507 - 524.
  • Obrist, D., Pearson, C., Webster, J., Kane, T., Lin, C., Aiken, G.R. (2016). Terrestrial mercury in the western United States: spatial distribution defined by land cover and plant productivity. . The Science of the Total Environment,568 522-535.
  • Obrist, D., Zielinska, B., Perlinger, J.A. (2015). Accumulation of polycyclic aromatic hydrocarbons (PAHs) and oxygenated PAHs (OPAHs) in organic and mineral soil horizons from four U.S. remote forests. Chemosphere,134 98 - 105.
  • Weiss-Penzias, P., Amos, H.M., Selin, N.E., Gustin, M.S., Jaffe, D.A., Obrist, D., Sheu, G., Giang, A. (2015). Corrigendum to "Use of a global model to understand speciated atmospheric mercury observations at five high-elevation sites" published in Atmos. Chem. Phys., 15, 1161–1173, 2015. Atmospheric Chemistry and Physics,15(4) 2225-2225.
  • Pierce, A.M., Moore, C.W., Wohlfahrt, G., Hortnagl, L., Kljun, N., Obrist, D. (2015). Eddy covariance flux measurements of gaseous elemental mercury using cavity ring-down spectroscopy. Environmental Science and Technology,49(3) 1559 - 1568.
  • Pearson, C., Schumer, R., Rittger, K., Johnson, D., Obrist, D. (2015). Nutrient and mercury deposition and storage in an alpine snowpack of the Sierra Nevada, USA. Biogeosciences,12 3665-3680.
  • Amos, H.M., Sonke, J.E., Obrist, D., Robins, N., Hagan, N., Horowitz, H.M., Mason, R.P., Witt, M., Hedgecock, I.M., Corbitt, E.S., Sunderland, E.M. (2015). Observational and modeling constraints on global anthropogenic enrichment of mercury. Environmental Science and Technology,49(7) 4036 - 4047.
  • Peleg, M., Tas, E., Obrist, D., Matveev, V., Moore, C., Gabay, M., Luria, M. (2015). Observational Evidence for Involvement of Nitrate Radicals in Nighttime Oxidation of Mercury. Environmental Science and Technology,49(24) 14008 - 14018.
  • Weiss-Penzias, P., Amos, H.M., Selin, N.E., Gustin, M.S., Jaffe, D.A., Obrist, D., Sheu, G., Giang, A. (2015). Use of a global model to understand speciated atmospheric mercury observations at five high-elevation sites. Atmospheric Chemistry and Physics,15(3) 1161-1173.
  • Teisserenc, R., Lucotte, M., Canuel, R., Moingt, M., Obrist, D. (2014). Combined dynamics of mercury and terrigenous organic matter following impoundment of Churchill Falls Hydroelectric Reservoir, Labrador. Biogeochemistry, (1-3) 21.
  • Moore, C.W., Obrist, D., Steffen, A., Staebler, R.M., Douglas, T.A., Richter, A., Nghiem, S.V. (2014). Convective forcing of mercury and ozone in the Arctic boundary layer induced by leads in sea ice. Nature, (7486) 81.
  • Obrist, D., Pokharel, A.K., Moore, C. (2014). Vertical profile measurements of soil air suggest immobilization of gaseous elemental mercury in mineral soil. Environmental Science and Technology,48(4) 2242 - 2252.
  • Moore, C.W., Obrist, D., Luria, M. (2013). Atmospheric mercury depletion events at the Dead Sea: Spatial and temporal aspects. Atmospheric Environment,69 231 - 239.
  • Pierce, A., Obrist, D., Moosmüller, H., Faïn, X., Moore, C. (2013). Cavity ring-down spectroscopy sensor development for high-time-resolution measurements of gaseous elemental mercury in ambient air. Atmospheric Measurement Techniques,6(6) 1477-1489.
  • Teisserenc, R., Lucotte, M., Canuel, R., Moingt, M., Obrist, D. (2013). Combined dynamics of mercury and terrigenous organic matter following impoundment of Churchill Falls Hydroelectric Reservoir, Labrador. Biogeochemistry,vol. 118 pp. 21-34.
  • Faïn, X., Helmig, D., Hueber, J., Obrist, D., Williams, M.W. (2013). Mercury dynamics in the Rocky Mountain, Colorado, snowpack. Biogeosciences,10(6) 3793-3807.
  • Hararuk, O., Obrist, D., Luo, Y. (2013). Modelling the sensitivity of soil mercury storage to climate-induced changes in soil carbon pools. Biogeosciences,10(4) 2393-2407.
  • Zhang, Y., Obrist, D., Zielinska, B., Gertler, A. (2013). Particulate emissions from different types of biomass burning. Atmospheric Environment,72 27 - 35.
  • Van Dam, B., Helmig, D., Burkhart, J.F., Obrist, D., Oltmans, S.J. (2013). Springtime boundary layer O3 and GEM depletion at Toolik Lake, Alaska. Journal of Geophysical Research. Atmospheres,118(8) 3382.
  • Nghiem, S.V., Clemente-Colón, P., Douglas, T., Moore, C., Obrist, D., Perovich, D.K., Pratt, K.A., Rigor, I.G., Simpson, W., Shepson, P.B., Steffen, A., Woods, J. (2013). Studying Bromine, Ozone, and Mercury Chemistry in the Arctic. Eos, Transactions American Geophysical Union,94(33) 289-291.
  • Obrist, D., Johnson, D.W., Edmonds, R.L. (2012). Effects of vegetation type on mercury concentrations and pools in two adjacent coniferous and deciduous forests. Journal of Plant Nutrition and Soil Science,175(1) 68-77.
  • Obrist, D., Johnson, D.W., Edmonds, R.L. (2012). Effects of vegetation type on mercury concentrations and pools in two adjacent coniferous and deciduous forests. Journal of Plant Nutrition & Soil Science!!!,175(1) 68.
  • Obrist, D. (2012). Erratum: Mercury distribution across 14 U.S. forests. Part II: Patterns of methyl mercury concentrations and areal mass of total and methyl mercury (Environmental Science and Technology (2012) 46 (5921-5930) DOI: 10.1021/es2045579). Environmental Science and Technology,46(13) 7434 -.
  • Tas, E., Obrist, D., Peleg, M., Matveev, V., Faïn, X., Asaf, D., Luria, M. (2012). Measurement-based modeling of bromine-induced oxidation of mercury above the Dead Sea. Atmospheric Chemistry and Physics,12(5) 2429-2440.
  • Obrist, D. (2012). Mercury distribution across 14 U.S. forests. Part II: Patterns of methyl mercury concentrations and areal mass of total and methyl mercury. Environmental Science and Technology,46(11) 5921 - 5930.
  • Obrist, D., Tas, E., Peleg, M., Matveev, V., Faïn, X., Asaf, D., Luria, M. (2011). Bromine-induced oxidation of mercury in the mid-latitude atmosphere. Nature Geoscience,4(1) 22-26.
  • Pokharel, A.K., Obrist, D. (2011). Fate of mercury in tree litter during decomposition. Biogeosciences,8(9) 2507-2521.
  • Volk, M., Obrist, D., Novak, K., Giger, R., Bassin, S., Fuhrer, J. (2011). Subalpine grassland carbon dioxide fluxes indicate substantial carbon losses under increased nitrogen deposition, but not at elevated ozone concentration. Global Change Biology, (1) 366.
  • Faïn, X., Obrist, D., Pierce, A., Barth, C., Gustin, M.S., Boyle, D.P. (2011). Whole-watershed mercury balance at Sagehen Creek, Sierra Nevada, CA. Geochimica et Cosmochimica Acta,75 2379 - 2392.
  • Obrist, D., Johnson, D.W., Lindberg, S.E., Luo, Y., Hararuk, O., Bracho, R., Battles, J.J., Dail, D.B., Edmonds, R.L., Monson, R.K., Ollinger, S.V., Pallardy, S.G., Pregitzer, K.S., Todd, D.E. (2011). Mercury Distribution Across 14 U.S. Forests. Part I: Spatial Patterns of Concentrations in Biomass, Litter, and Soils. Environmental Science & Technology,45(9) 3974-3981.
  • Obrist, D., Fain, X., Berger, C. (2010). Gaseous elemental mercury emissions and CO2 respiration rates in terrestrial soils under controlled aerobic and anaerobic laboratory conditions. Science of the Total Environment,408(7) 1691 - 1700.
  • Mack, L.A., Levin, E.J., Kreidenweis, S.M., Obrist, D., Moosmüller, H., Lewis, K.A., Arnott, W.P., McMeeking, G.R., Sullivan, A.P., Wold, C.E., Hao, W., Collett, J.L., Malm, W.C. (2010). Optical closure experiments for biomass smoke aerosols. Atmospheric Chemistry and Physics,10(18) 9017-9026.
  • Faïn, X., Moosmüller, H., Obrist, D. (2010). Toward real-time measurement of atmospheric mercury concentrations using cavity ring-down spectroscopy. Atmospheric Chemistry and Physics,10(6) 2879-2892.
  • Faïn, X., Obrist, D., Hallar, A.G., Mccubbin, I., Rahn, T. (2009). High levels of reactive gaseous mercury observed at a high elevation research laboratory in the Rocky Mountains. Atmospheric Chemistry and Physics,9(20) 8049-8060.
  • Obrist, D., Johnson, D.W., Lindberg, S.E. (2009). Mercury concentrations and pools in four Sierra Nevada forest sites, and relationships to organic carbon and nitrogen. Biogeosciences,6(5) 765-777.
  • Cheng, X., Luo, Y., Su, B., Verburg, P.S., Hui, D., Obrist, D., Arnone, III, J., Johnson, D.W., Evans, R.D. (2009). Responses of net ecosystem CO2 exchange to nitrogen fertilization in experimentally manipulated grassland ecosystems. Agricultural and Forest Meteorology,149(Special Section on Water and Carbon Dynamics in Selected Ecosystems in China) 1956 - 1963.
  • Obrist, D., Hallar, A.G., McCubbin, I., Stephens, B.B., Rahn, T. (2008). Atmospheric mercury concentrations at Storm Peak Laboratory in the Rocky Mountains: Evidence for long-range transport from Asia, boundary layer contributions, and plant mercury uptake. Atmospheric Environment,42(33) 7579 - 7589.
  • FRITSCHE, J., Obrist, D., ZEEMAN, M., CONEN, F., EUGSTER, W., ALEWELL, C. (2008). Elemental mercury fluxes over a sub-alpine grassland determined with two micrometeorological methods. Atmospheric Environment,42(13) 2922-2933.
  • Fritsche, J., Obrist, D., Alewell, C. (2008). Evidence of microbial control of Hg0emissions from uncontaminated terrestrial soils. Journal of Plant Nutrition & Soil Science!!!,171(2) 200.
  • Obrist, D., Moosmuller, H., Schurmann, R., Chen, L.A., Kreidenweis, S.M. (2008). Particulate-phase and gaseous elemental mercury emissions during biomass combustion: Controlling factors and correlation with particulate matter emissions. Environmental Science and Technology,42(3) 721 - 727.
  • Obrist, D. (2007). Atmospheric Mercury Pollution Due to Losses of Terrestrial Carbon Pools?. Biogeochemistry, (2) 119.
  • Li, W., Collins, J.F., Durbin, T.D., Huai, T., Ayala, A., Full, G., Mazzoleni, C., Nussbaum, N.J., Obrist, D., Zhu, D., Kuhns, H.D., Moosmuller, H. (2007). Detection of gasoline vehicles with gross PM emissions. SAE Technical Papers
  • Faïn, X., Grangeon, S., Bahlmann, E., Fritsche, J., Obrist, D., Dommergue, A., Ferrari, C.P., Cairns, W., Ebinghaus, R., Barbante, C., Cescon, P., Boutron, C. (2007). Diurnal production of gaseous mercury in the alpine snowpack before snowmelt. Journal of Geophysical Research,112(D21).
  • Peleg, M., Matveev, V., Tas, E., Luria, M., Valente, R.J., Obrist, D. (2007). Mercury depletion events in the troposphere in mid-latitudes at the Dead Sea, Israel. Environmental Science and Technology,41(21) 7280 - 7285.
  • Obrist, D., Conen, F., Vogt, R., Siegwolf, R., Alewell, C. (2006). Estimation of Hg0 exchange between ecosystems and the atmosphere using 222Rn and Hg0 concentration changes in the stable nocturnal boundary layer. Atmospheric Environment,40(5) 856 - 866.
  • Millhollen, A.G., Gustin, M.S., Obrist, D. (2006). Foliar mercury accumulation and exchange for three tree species. Environmental Science and Technology,40(19) 6001 - 6006.
  • Millhollen, A., Obrist, D., Gustin, M. (2006). Mercury accumulation in grass and forb species as a function of atmospheric carbon dioxide concentrations and mercury exposures in air and soil. Chemosphere,65(5) 889-897.
  • Prater, M.R., Obrist, D., Arnone, J.A., DeLucia, E.H. (2006). Net carbon exchange and evapotranspiration in postfire and intact sagebrush communities in the Great Basin. Oecologia, (4) 595.
  • Obrist, D., Gustin, M.S., Arnone, III, J.A., Johnson, D.W., Schorran, D.E., Verburg, P.S. (2005). Measurements of gaseous elemental mercury fluxes over intact tallgrass prairie monoliths during one full year. Atmospheric Environment,39(5) 957 - 965.
  • Prater, M.R., Obrist, D., Arnone, III, J.A., DeLucia, E.H., Ehleringer, J. (2005). Net carbon exchange and evapotranspiration in postfire and intact sagebrush communities in the Great Basin. Oecologia,146(4) 595.
  • Verburg, P.S., Arnone, III, J.A., Obrist, D., Schorran, D.E., Evans, R.D., Leroux-Swarthout, D., Johnson, D.W., Luo, Y., Coleman, J.S. (2004). Net ecosystem carbon exchange in two experimental grassland ecosystems. Global Change Biology,10(4) 498 - 508.
  • Obrist, D., Yakir, D., Arnone, J.A. (2004). Temporal and spatial patterns of soil water following wildfire-induced changes in plant communities in the Great Basin in Nevada, USA. Plant and Soil, (1/2) 1.
  • Arnone, III, J., Obrist, D. (2003). A large daylight geodesic dome for quantification of whole-ecosystem CO2 and water vapour fluxes in arid shrublands. Journal of Arid Environments,55 629 - 643.
  • OBRIST, D., DELUCIA, E.H., ARNONE, J.A. (2003). Consequences of wildfire on ecosystem CO2 and water vapour fluxes in the Great Basin. Global Change Biology,9(4) 563 - 574.
  • Obrist, D., Arnone III, J.A. (2003). Increasing CO2 accelerates root growth and enhances water acquisition during early stages of development in Larrea tridentata. New Phytologist,159(1) 175-184.
  • Obrist, D., Verburg, P., Young, M., Coleman, J., Schorran, D., Arnone, J. (2003). Quantifying the effects of phenology on ecosystem evapotranspiration in planted grassland mesocosms using EcoCELL technology. Agricultural and Forest Meteorology,118(3-4) 173-183.
  • Obrist, D. (2002). Hydrologic interactions between plants and soils in shrub -dominated arid ecosystems: Effects of global environmental change. ProQuest Dissertations and Theses Global.
  • Obrist, D., Arnone III, J.A., Körner, C. (2001). In situ Effects of Elevated Atmospheric CO2 on Leaf Freezing Resistance and Carbohydrates in a Native Temperate Grassland. Annals of Botany,87(6) 839-844.

Selected Presentations

  • Thawing of Arctic Soils: Control of Trace Element Dynamics by Organic Matter - Goldschmidt Conference, 2017 - Paris, France
  • A mass balance of atmospheric mercury deposition in the Arctic tundra: gaseous elemental mercury uptake drives a globally-important mercury sink. - International Conference on Mercury as a Global Pollutant, 2017 - Providence, RI, USA
  • A review of global environmental mercury processes in response to human and natural perturbations: changes of emissions, climate and land use. - International Conference on Mercury as a Global Pollutant, 2017 - Providence, RI, USA
  • Biogeochemical reactions of iron-bound organic carbon during the redox processes - Principle Investigators meeting, 2017 - Potomac MD
  • Investigating greenhouse gas tundra soil fluxes during freeze-thaw cycles under controlled laboratory conditions. - Principle Investigators meeting., 2017 - Potomac MD
  • A mass balance of atmospheric mercury deposition in the Arctic tundra: gaseous elemental mercury uptake drives a globally-important mercury sink - International Conference on Mercury as a Global Pollutant, July 2017 - Providence, RI
  • A mercury isotope study on terrestrial - atmosphere mercury exchange in the Arctic tundra - International Conference on Mercury as a Global Pollutant, July 2017 - Providence, RI
  • Hg Storage and Mobility in Arctic tundra Ecosystems of Northern Alaska - International Conference on Mercury as a Global Pollutant, July 2017 - Providence, RI
  • Validating mercury emissions based on background air monitoring at the High Altitude Research Station Jungfraujoch (3580 m) - International Conference on Mercury as a Global Pollutant, July 2017 - Providence, RI
  • Biogeochemical controls on the stability of iron-bound soil organic carbon - American Chemical Society Spring Conference, April 2017 - San Francisco
  • Coupled Dynamics of Iron and Iron-bound Organic Carbon in Forest Soils during Anaerobic Reduction - American Chemical Society Spring Conference, April 2017 - San Francisco
  • Linking Carbon Stability to Iron Redox Reactions - American Chemical Society Spring Conference, April 2017 - San Francisco, CA
  • Processes for iron-bound organic carbon in redox reactions: Natural soils and model complexes. - Principle Investigators meeting, April 2017 - Potmac, MD
  • Investigating greenhouse gas fluxes from tundra soils during freeze and thaw cycles using GC-MS flux chambers - Toolik Field Station All Scientists Meeting, January 2017
  • Soil and plant mercury dynamics in the Arctic tundra - Toolik Field Station All Scientists Meeting, January 2017
  • Improvements in Mercury Atmosphere-Surface Exchange Parameterizations for Incorporation into Chemical Transport Models - American Geophysical Union Fall Meeting , December 2016 - San Francisco
  • Two-year record of trace gas (CO2, CH4, O2, and Hg0) concentrations and dynamics in arctic tundra soils of northern Alaska – seasonality, non-linear temperature controls, and effects of soil diffusivity - American Geophysical Union Fall Meeting, December 2016 - San Francisco
  • Biogeochemical Cycles of Iron-Bound Organic Carbon in Forest Soils - DOE ESS-PI Meeting, 2016 - Potomac, MD
  • Systematic Investigation of the Biogeochemical Stability of Iron Oxide-Bound Organic Carbon: Linking Redox Cycles and Carbon Persistence - DOE ESS-PI Meeting, 2016 - Potomac, MD
  • . Terrestrial Mercury Biogeochemistry: A Need To Re-assess the Role of Dry Deposition of Elemental Mercury - Goldschmidt Conference, 2016 - Yokohama
  • Methane emissions throughout the year in arctic tundra, northern Alaska - Goldschmidt Conference, 2016 - Yokohama
  • Importance of Iron in Stabilization of Organic Carbon with Emphasis on the Influences of Soil Physicochemical Properties - Nevada Water Environment Association Annual Meeting, 2016 - Sparks, NV
  • Coupled Dynamics of Iron and Iron-bound Organic Carbon in Forest Soils during Anaerobic Reduction - Soil Science Society of America Annual Meeting, 2016
  • Canopy influence on metal dynamics in snowfall, snowpack, and snowmelt - International Conference on Heavy Metals in the Environment, September 2016 - Ghent, Belgium
  • Mercury deposition to Arctic soils - Insights from stable mercury isotopes, April 2016 - Vienna, Austria
  • . Spatial and Temporal Variability of Methane Mole Fractions and Exchanges in and Between Soil, Snow, and the Atmosphere in a Tundra System in Northern Alaska - American Geophysical Union Fall Meeting , December 2015 - San Francisco
  • Importance of Iron and Soil Physicochemical Properties to Stabilize Organic Carbon in Soils - American Geophysical Union Fall Meeting , December 2015 - San Francisco
  • Measurements to Refine Global and Regional Scale Atmospheric Transport Models - American Geophysical Union Fall Meeting, December 2015 - San Francisco
  • Preliminary Assessment of Mercury Atmosphere-Surface Exchange Parameterizations for Incorporation into Chemical Transport Models - American Geophysical Union Fall Meeting, December 2015 - San Francisco
  • Soil and Plant Mercury Concentrations and Pools in the Arctic Tundra of Northern Alaska - American Geophysical Union Fall Meeting , December 2015 - San Francisco
  • Mercury dynamics of an arctic tundra ecosystem in northern Alaska: a mass balance - American Geophysical Union Fall Meeting in San Francisco, December 2015. , December 2015 - San Francisco
  • Western North American Mercury Synthesis (WNAMS): A multi-disciplinary tri-national assessment of the climate, landscape, and land-use controls on mercury risk to ecological and human health across western North America - Society of Environmental Toxicology and Chemistry (SETCAC) 36th Annual Meeting, November 2015 - Salt Lake City
  • . Characterizing spatial and temporal variability of snow water equivalent - Tahoe Science Conference, September 2015 - Reno
  • . Observation of night time GEM depletion events over an Australian mid-latitude Alpine grassland - International Conference on Mercury as a Global Pollutant, June 2015 - Jeju, South Korea
  • A global analysis of surfaces-atmosphere exchange of gaseous elemental mercury (Hg0) - International Conference on Mercury as a Global Pollutant, June 2015 - Jeju, South Korea
  • Global anthropogenic enrichment of mercury and implications for future environmental concentrations - International Conference on Mercury as a Global Pollutant, June 2015 - Jeju, South Korea
  • Mercury dynamics of an inland tundra ecosystem in northern Alaska: an attempt for a first mass balance. - International Conference on Mercury as a Global Pollutant, June 2015 - Jeju, South Korea
  • Mercury isotope compositions in North American forests - International Conference on Mercury as a Global Pollutant, June 2015 - Jeju, South Korea
  • Potential impacts of emissions, increases in temperature and sea ice loss on the mercury cycle in the high Arctic - International Conference on Mercury as a Global Pollutant, June 2015 - Jeju, South Korea
  • Role of Snow and Ice Surfaces in the Atmospheric Cycling of Mercury in the Arctic - International Conference on Mercury as a Global Pollutant, June 2015 - Jeju, South Korea
  • Soil and plant mercury concentrations and pools in the Arctic tundra of northern Alaska - International Conference on Mercury as a Global Pollutant, June 2015 - Jeju, South Korea
  • Source apportionment of atmospheric mercury based on background air monitoring at the High Altitude Research Station Jungfraujoch (3580 m) - International Conference on Mercury as a Global Pollutant, June 2015 - Jeju, South Korea
  • Comparisons of Terrestrial Mercury (Hg) Accumulation and Dynamics across Temperate Forests and an Arctic Tundra site. - AGU-GAC-MAC-CGU Joint Assembly, May 2015 - Montreal, Canada
  • Characterizing spatial varaibulity of snow water equivalent using pressure sensors. - 2015 Western Snow Conference, April 2015 - Grass Valley, CA
  • A comprehensive database of global soil-snow-atmosphere flux studies of mercury - American Geophysical Union Fall Meeting, December 2014 - San Francisco
  • Accumulation of polycyclic aromatic hydrocarbons (PAHs) in surface litter and soils in four forests in the United States. - American Geophysical Union Fall Meeting, December 2014 - San Francisco
  • The Role of Biogeochemical Cycling of Atmosphere-surface Exchangeable Pollutants (ASEPs) in the Dynamic Coupled Human-Natural ASEP System. - American Geophysical Union Fall Meeting, December 2014 - San Francisco
  • The role of snow cover on surface trace gas exchanges at Toolik Lake, AK - American Geophysical Union Fall Meeting, December 2014 - San Francisco
  • A comprehensive database of global soil-atmosphere flux studies of mercury - Soil Science Society of America Annual Meeting, November 2014 - Long Beach, CA
  • Soil mercury sequestration and re-mobilization and relationships to the global cycling of mercury - Soil Science Society of America Annual Meeting, November 2014 - Long Beach, CA
  • An overview of mercury speciation measurements and analysis at high latitudes - Data collection, analysis, and application of speciated mercury workshop, July 2014 - San Francisco, CA
  • Nutrient and mercury dynamics within the Lake Tahoe basin snowpack. - Mountain Observatories Fair and Workshop, July 2014 - Reno
  • Mercury Depletion, Deposition, and Re-emission in Snowpack over the Arctic Tundra and Ocean - Goldschmidt Conference, June 2014 - Sacramento
  • Mercury isotope compositions in North American forest soils and litters - Goldschmidt Conference, June 2014 - Sacramento
  • Terrestrial mercury cycling: sequestration and re-emissions - Seminar; Federal Institute of Technology, May 2014 - Zurich, Switzerland
  • Persistent Semi-Volatile Pollutants: A Long-term Problem - Seminar; University of Basel, Switzerland, April 2014 - Basel, Switzerland
  • Mercury in terrestrial environments: sinks, sources, and impacts for atmospheric loads - National Ecological Observatory network (NEON), Seminar, February 2014 - Boulder, CO
  • Mercury isotope compositions in North American forest soils and litters - Fall Meeting, AGU, B41C-0415, December 2013 - San Francisco
  • Spatial and temporal patterns of air concentrations of mercury in Western North America 1998-present - Fall Meeting, AGU, B44B-04, December 2013 - San Francisco
  • . Nutrient and Mercury Concentrations and Loads in Tahoe Basin Snowpack. - Fall Meeting, AGU, C12A-07, December 2013 - San Francisco
  • Sequestration and re-emission of Atmosphere-Surface Exchangeable Pollutants (ASEPs). Community and Partner Workshop: Managing impacts of global transport of atmosphere-surface exchangeable pollutants (ASEPs) in the context of global change - Great Lakes Research Center, November 2013 - Hougthon, MI
  • Linking atmospheric and terrestrial cycles of Surface-Atmosphere-Exchangeable Pollutants (ASEPS). , November 2013 - , Houghton, MI
  • Mercury cycling in terrestrial environments – an ecosystem perspective. Department of Forest Ecology and Management - Seminar, October 2013 - Umeå, Sweden
  • Terrestrial ecosystems and atmospheric mercury loads: Sequestration of past pollution and importance of legacy re-emissions. - Seminar, October 2013 - Cork, Ireland
  • Polycyclic Aromatic Hydrocarbons (PAHs) in Soil and Litter Samples. - 24th Meeting of the International Symposium on Polycyclic Aromatic Compounds (ISPAC 2013), September 2013 - Corvallis, OR, USA
  • Measurement-based modelling of bromine-induced oxidation of mercury above the Dead Sea. - The Atmospheric Chemistry Gordon Research Conference, August 2013 - West Dover, VT, USA
  • . Is Nitrate radical a major oxidant of elemental mercury in the atmosphere? - International Conference on Mercury as a Global Pollutant, July 2013 - Edinburgh, Scotland
  • An atmospheric simulation chamber study of the bromine-initiated oxidation of mercury at a range of temperatures. - International Conference on Mercury as a Global Pollutant, July 2013 - Edinburgh, Scotland
  • Atmospheric mercury concentration measurements and eddy covariance flux measurements using cavity ring-down spectroscopy - International Conference on Mercury as a Global Pollutant, July 2013 - Edinburgh, Scotland
  • Coupled Atmosphere-Terrestrial Modeling of Global Mercury Cycling - International Conference on Mercury as a Global Pollutant, July 2013 - Edinburgh, Scotland
  • Effects of Sea Ice Dynamics on Arctic Atmospheric Mercury Cycling. - International Conference on Mercury as a Global Pollutant, July 2013 - Edinburgh, Scotland
  • Elemental Mercury Depletion in Soils: An Unaccounted Mercury Sink? - International Conference on Mercury as a Global Pollutant, July 2013 - Edinburgh, Scotland
  • The role of BrO in the oxidation of GEM: A chamber investigation at close-to-representative concentrations. - International Conference on Mercury as a Global Pollutant, July 2013 - Edinburgh, Scotland
  • Vertical gaseous elemental mercury concentration gradients, mercury redox processes, and surface exchanges in alpine and polar snowpacks. - International Conference on Mercury as a Global Pollutant, July 2013 - Edinburgh, Scotland
  • Science Progress from the BRomine, Ozone, and Mercury EXperiment (BROMEX) - Davos Atmosphere and Cryosphere Assembly 2013 Air, Ice & Process Interactions, July 2013 - Davos, Switzerland
  • . Measurement-based modelling of bromine-induced oxidation of mercury above the Dead Sea - 14th EuChemMS International Conference on Chemistry and the Environment (ICCE 2013). , June 2013 - Barcelona, Spain
  • Nitrogen and Phosphorus Concentrations and Loads within Lake Tahoe Snowpack. - University Council on Water Resources 2013 Annual Conference, June 2013 - Lake Tahoe
  • Mercury in alpine and Arctic snow: atmospheric deposition and fate processes. - Seminar Graduate Program of Hydrologic Sciences, April 2013 - Reno, USA
  • Arctic sea ice reduction and tropospheric chemical processes. - The Fourth International Conference on Bioenvironment, Biodiversity and Renewable Energies, BIONATURE, March 2013 - Lisbon, Portugal
  • Is nitrate radical a major oxidant of elemental mercury in the atmosphere? - Fall Meeting, AGU, Abstract A13D-0253, December 2012 - San Francisco
  • Concentrations of total and dissolved Hg in snow and vapor deposition collected during atmospheric mercury depletion events (AMDEs) in Barrow, Alaska during the BROMEX campaign. - Fall Meeting, AGU, Abstract A31D-0059, December 2012 - San Francisco
  • Influence of Sea Ice Dynamics on Atmospheric Mercury and Ozone Concentrations and Fluxes during the BROMEX Campaign. - Fall Meeting, AGU, Abstract A31D-0065, December 2012 - San Francisco
  • Quantifying Nutrient and Mercury Concentrations and Loads in Lake Tahoe Snowpack. - Fall Meeting, AGU, Abstract B23H-0540, December 2012 - San Francisco
  • Emissions of Carbon Species, Organic Polar Compounds, Potassium, and Mercury from Controlled Biomass Burning. - Air Quality Management at Urban, Regional, and Global Scales; 4th International Symposium and IUAPPA Regional Conference, September 2012 - Istanbul, Turkey
  • Quantifying Nutrient and Mercury Concentrations and Loads in Tahoe Snowpack. , September 2012 - Milwaukee
  • Modeling the sensitivity of soil mercury storage to climate-induced changes in soil carbon pools. - 97th Annual Ecological Society of America Meeting, August 2012 - Portland, Oregon, USA
  • Terrestrial Mercury Surface Reservoirs: Magnitude, Spatial Patterns, Fate, and Re-emission Potential to the Atmosphere. - 1st conference on Atmospheric Biogeosciences, June 2012 - Boston
  • Emissions of carbon species, organic polar compounds, potassium, and mercury from prescribed burning activities. - 2012 Tahoe Science Conference, May 2012 - Incline Village, CA
  • Observations of springtime surface O3 and GEM depletion at Toolik Lake, AK. - National Ocean & Atmospheric Administration, Earth System Research Laboratory Global Monitoring Annual Conference, May 2012 - Boulder, CO
  • Smoke emissions from prescribed burning in the Lake Tahoe Basin (Nevada/California). - Tahoe Science Conference, May 2012 - Incline Village, CA
  • Mercury Accumulation in Terrestrial Carbon Reservoirs: Magnitude, Spatial Patterns, Fate upon C losses, and Implications of Global Change. - European Geophysical Union Annual Meeting, Abstract EGU2012-11087, April 2012 - Vienna, Austria.
  • Cavity ring-down spectroscopy (CRDS) system for measuring atmospheric mercury using differential absorption. - European Geophysical Union Annual Meeting, Abstract EGU2012-11454ys, April 2012 - Vienna, Austria
  • Emissions of carbon species, organic polar compounds, potassium, and mercury from prescribed burning activities. - European Geophysical Union Annual Meeting, Abstract EGU2012-12008ys, April 2012 - Vienna, Austria
  • Bromine-induced atmospheric mercury depletion events (AMDEs) at the Dead Sea: magnitude, frequency, spatial extent, and modeled reaction pathways. - European Geophysical Union Annual Meeting, Abstract EGU2012-12475, April 2012 - Vienna, Austria
  • Mercury Surface-Atmosphere Flux and Speciation Measurements in Barrow, Alaska, USA during the BROMEX campaign. - European Geophysical Union Annual Meeting, Abstract EGU2012-12603ys, April 2012 - Vienna, Austria.
  • DRI Mercury Research to Benefit WCSD Students. - Washoe County School District Employee Newsletter., February 2012
  • Mercury in Sierra Nevada Forests. - Blodgett Forest Research Workshop, January 2012 - Georgetown, CA
  • Air chemistry over the Dead Sea: Observations and model simulations. - Fall Meeting, AGU, Abstract A41A-0048, December 2011 - San Francisco
  • Behavior and transport of mercury in soil profiles. - Fall Meeting, AGU, Abstract B33H-0578, December 2011 - San Francisco
  • Temperature and precipitation effect on the top soil mercury stocks: a sensitivity analysis. - 96th Annual Ecological Society of America Meeting, August 2011 - Austin, Texas, USA
  • Air Above Dead Sea Contains Very High Levels of Oxidized Mercury. , July 2011
  • Measurement-based modeling of reactive bromine species over the Dead Sea: Measurements and Modeling of Atmospheric Mercury Depletion Events at the Dead Sea, Israel. - International Conference on Mercury as a Global Pollutant, July 2011 - Halifax, Nova Scotia
  • Mercury distribution across 14 U.S. forests: Spatial patterns of total and methyl-mercury concentrations in biomass, litter, and soils. - International Conference on Mercury as a Global Pollutant, July 2011 - Halifax, Nova Scotia
  • Atmospheric mercury concentration measurements using cavity ring-down spectroscopy. - International Conference on Mercury as a Global Pollutant,, July 2011 - Halifax, Nova Scotia
  • Atmospheric mercury concentration measurements using cavity ring-down spectroscopy. - Fall Meeting, AGU, Abstract A41A-0047, December 2010 - San Francisco
  • Soil-Plant-Atmosphere Interactions of Mercury. - Seminar, December 2010
  • Mercury research at DRI: Measurements from –1,400 to +11,000 feet elevation. - Invited presentation, Kick-off Meeting of the Global Mercury Observation System (GMOS), November 2010 - Rome
  • . Particulate emissions from biomass burning: contributions from residential wood combustion, forest fires, and prescribed fires. - Lake Tahoe Environmental Research Center Symposium on Forest Management Decision Support Tools. , November 2010
  • Total mercury and methyl-mercury concentrations and pools across 14 U.S. forest sites: Factors that determine mercury loads in remote terrestrial ecosystems. - 2010 Annual Scientific Symposium of the National Atmospheric Deposition Program, October 2010
  • Whole-watershed mercury balance in a Sierra Nevada ecosystem. - 2010 Annual Scientific Symposium of the National Atmospheric Deposition Program, October 2010
  • Effects of global change on the atmospheric mercury burden and mercury sequestration through changes in ecosystem carbon pools. - EPA STAR Program “Consequences of Global Change for Air Quality” Progress and Review Meeting, October 2010 - Research Triangle Park, North Carolina
  • Spatial distribution of mercury across U.S. forests: Spatial relationships to atmospheric pollution and ecological processes. - Invited Seminar, Graduate Program of Environmental Sciences, October 2010 - Reno
  • Atmospheric Mercury: from –400 m to +3200 m elevation., June 2010 - Zurich
  • . Efficient Bromine-Induced Mercury Oxidation Observed Under Temperate Conditions at the Dead Sea. - Goldschmidt 2010: Earth, Energy, and the Environment, June 2010 - Knoxville, Tennessee
  • Atmospheric mercury patterns observed at a high elevation (3220 m a.s.l.) research station - Storm Peak Laboratory, in the Rocky Mountains, USA. Symposium on Atmospheric Chemistry and Physics at Mountain Sites, June 2010 - Interlaken, Switzerland
  • Overview of Storm Peak Laboratory. - Symposium on Atmospheric Chemistry and Physics at Mountain Sites, June 2010 - Interlaken, Switzerland
  • Investigation of air-snow exchanges of mercury: proof of concept for automated gradient sampling of interstitial air at the Summit FLUX facility. - State of the Arctic Conference, March 2010 - Miami, Florida
  • Mercury chemistry in the air over the Dead Sea. - Kaplan Memorial Symposium on Biogeochemistry at the Dead Sea, January 2010 - Jerusalem
  • Extensive halogen-induced mercury oxidations in the Dead Sea Basin - American Geophysical Union Fall Meeting. Fall Meet Suppl. Abstract A21B-0141, December 2009 - San Francisco
  • Assessing the fate of litter mercury during decomposition under controlled laboratory conditions - American Geophysical Union Fall Meeting. Fall Meet Suppl. Abstract A51G-0201, December 2009 - San Francisco
  • Do seasonal snowpacks enhance or decrease mercury contamination of high elevation ecosystems? - American Geophysical Union Fall Meeting. Fall Meet Suppl. Abstract A51G-0203, December 2009 - San Francisco
  • Interactions of atmospheric mercury with terrestrial ecosystems: uptake, storage, and emissions. - Invited Seminar, October 2009 - Canada
  • Cavity Ring-Down Spectroscopy for Measurement of Gaseous Elemental Mercury Concentrations and Fluxes. - Oral Presentation, 9th International Conference on Mercury as a Global Pollutant (9th ICMGP), June 2009 - Guiyang city, China
  • Effects of global change on the terrestrial mercury fluxes and mercury sequestration through changes in ecosystem carbon pools. - Oral Presentation, 9th International Conference on Mercury as a Global Pollutant (9th ICMGP), June 2009 - Guiyang city, China
  • Speciated mercury measured at a high elevation research station, Colorado: in situ conversion and transport from the upper troposphere. - Oral Presentation, 9th International Conference on Mercury as a Global Pollutant (9th ICMGP), June 2009 - Guiyang city, China
  • The fate of mercury in soils and litter during carbon decomposition: relationships between Hg0 and CO2 emissions in the laboratory and field and a litter mass balance study. - Poser Presentation, 9th International Conference on Mercury as a Global Pollutant (9th ICMGP), June 2009 - Guiyang city, China
  • Soil mercury and CO2 emissions and their relationship under controlled laboratory conditions: Effects of oxygen depletion and soil sterilization. - AGU 89(53), Fall Meet Suppl Abstract B43B-0435, December 2008
  • Speciated mercury measured at a high elevation research station, Colorado: in situ conversion and long range transport. - Eos Trans AGU 89(53), Fall Meet Suppl Abstract A53D-0323A, December 2008
  • Chemical and Aerosol Signatures of Biomass Burning via Long Range Transport observed at Storm Peak Laboratory. - Eos Trans AGU 89(53), Fall Meet Suppl Abstract A21B-0137., 2008
  • Ecosystem-level mercury exchange: Why is it important? Uncertainties? Hg sequestration in plant/soils and impacts on atmosphere, results from year-long MBR measurements/comparisons, and development of a real-time sensor for eddy covariance measurements. - Invited presentation, NSF Workshop on reducing the uncertainty in measurements of atmospheric Hg., October 2008 - Seattle, WA
  • Interactions of atmospheric mercury with terrestrial ecosystems: uptake, storage, and emissions - Invited Seminar, October 2008
  • Optical closure experiments for biomass smoke aerosols. - Submitted Platform presentation, American Association for Aerosol Research, 27th Annual Conference, October 2008 - Orlando, FL
  • Storm Peak Laboratory Investigates Air Quality from Regional and Long Range Sources. - Poster Presentation, American Meteorological Society, 13th Conference on Mountain Meteorology, August 2008 - Canada
  • Research in Transport of Asian Pollution at Storm Peak Laboratory, August 2008 - Denmark
  • Research in Transport of Asian Pollution at Storm Peak Laboratory, August 2008 - Switzerland
  • Cavity ring down and cavity enhanced detection measurements of extinction from smoke generated through laboratory combustion of wildland fires. - Abstract presented at the AMWA Moab conference, May 2008
  • Measurements of atmospheric mercury at Storm Peak Laboratory in the central Rocky Mountains: Evidence for local/ regional emissions and influence of long-range transport from Asia. - Title, Eos Trans. AGU, 88(52), Fall Meet., December 2007 - San Francisco
  • Storm Peak Laboratory's Research of Long Range Transport and Outreach Activities, October 2007 - New York, New York
  • Storm Peak Laboratory's Research of Long Range Transport and Outreach Activities, October 2007
  • A Comparison of Thermal-Optical Carbon Measurement Methods for Aerosols Emitted by a Series of Controlled Biomass Burning Experiments. - 26th Annual Conference, September 2007 - Reno, NV
  • Experimental and theoretical closure experiments for biomass smokes using extinction cells, photoacoustics, and nephelometry. - 26th Annual Conference, September 2007 - Reno, NV
  • Mercury monitoring at Storm Peak Laboratory in Colorado to determine regional and Asian long-range transport contributions to atmospheric mercury loads. - International Air Quality Conference, September 2007 - Arlington, VA
  • Mercury deposition almost two decades later – does it matter yet? - National Atmospheric Deposition Program (NADP) Scientific Symposium, September 2007 - Boulder, CO
  • Application of a 222Rn/H2O method to measure nighttime evapotranspiration in arid ecosystems to complement and scale-up conventional measurement methods. - NSF EPSCoR RING-TRUE III Project meeting: Scaling Environmental Processes in Heterogeneous Arid Soils (SEPHAS), September 2007 - Las Vegas, NV
  • Detection of Gasoline Vehicles with Gross PM Emissions., April 2007 - Detroit, MI
  • Comparison of Remote Sensing Devices with Gravimetric Measurements of Light-Duty Gasoline PM Emissions. - 17th CRC On-Road Vehicle Emissions Workshop, March 2007 - San Diego, CA
  • Detection of High PM Emitters. - Smog Check Technology Forum and Roundtable Discussion of the South Coast Air Quality Management District, March 2007 - Diamond Bar, CA
  • Effects of global change on the atmospheric mercury burden and mercury sequestration through changes in ecosystem carbon pools. Consequences of Global Change for Air Quality Progress Review, February 2007 - Raleigh, NC
  • Speciated mercury emissions from laboratory combustion of wildland fuel. - Tahoe Science Symposium, October 2006 - Incline Village, NV, USA.
  • Direct measurements of elemental mercury deposition in terrestrial ecosystems - 8th International Conference on Mercury as a Global Pollutant., August 2006 - Madison, WI, USA
  • Environmental controls on mercury flux from ecosystem components at different temporal scales. - 8th International Conference on Mercury as a Global Pollutant., August 2006 - Madison, WI, USA
  • Air-surface exchange of mercury in terrestrial ecosystems. 8th International Conference on Mercury as a Global Pollutant. , August 2006 - Madison, WI, USA.
  • Emissions from Laboratory Combustion of Wildland Fuels: Aerosol Optical Properties During Flaming and Smoldering Combustion Phases. - Aerosol Workshop on Climate Prediction Uncertainty, July 2006 - Santa Fe, NM, USA.
  • Development of a real-time cavity ring down laser absorption spectroscopy (CRLAS) sensor to measure atmospheric mercury concentrations and fluxes. - 61st Northwest Regional Meeting, June 2006 - Reno, NV, USA.
  • Measurement of elemental mercury deposition in terrestrial ecosystems – methods, results, and challenges. - 61st Northwest Regional Meeting, June 2006 - Reno, NV, USA.
  • Effects of microbiological activity on Hg0 emission in uncontaminated terrestrial soils. - 3rd Swiss Geoscience Meeting, November 2005 - Zürich, Switzerland.
  • Measuring gaseous Hg0 exchange between soils, plants, and the atmosphere – Methods and Challenges. - Invited Seminar, February 2005 - Heidelberg, Germany
  • Quantification of gaseous Hg0 emissions using micrometeoro-logical methods - Symposium: Biosphere-Atmosphere Exchange Research in Switzerland, Swiss Academy of Sciences, August 2004 - Sarnen, Switzerland.
  • Experimental examination of the influence of precipitation and moisture content on mercury emissions from soils. - 7th International Conference on Mercury as a Global Pollutant, June 2004 - Ljubljana, Slovenia
  • Hg exchange between grassland mesocosms and the atmosphere – large net Hg emissions over tallgrass prairie. - 7th International Conference on Mercury as a Global Pollutant, June 2004 - Ljubljana, Slovenia
  • Vegetated terrestrial ecosystems are large sources of Hg to the atmosphere. - American Geophysical Union Fall Meeting, Eos Trans. AGU, 84(46)., 2003
  • Large annual Hg emissions over Tallgrass Prairie grasslands indicate higher natural loading of Hg to the atmosphere than previously estimated. - First Swiss Geosciences Meeting, November 2003 - Basel, Switzerland
  • Canopy radiation- and water-use efficiencies of cheatgrass as affected by pulse and gradual N fertilization. - 87th Annual Meeting, 2002 - Tucson, AZ
  • Effects of wildfire-induced changes in plant community composition on ecosystem CO2 and water vapor fluxes in the Great Basin. - 87th Annual Meeting , 2002 - Tucson, AZ
  • Post-fire effects on ecosystem gas exchange patterns in northern Great Basin communities. - 87th Annual Meeting, 2002 - Tucson, AZ
  • The potential of short-rotation cropping systems to sequester C. - 87th Annual Meeting, 2002 - Tucson, AZ
  • A large daylight geodesic dome for quantification of whole-ecosystem carbon dioxide and water vapor fluxes. - American Geophysical Union Fall Meeting, Eos. Trans. AGU, 82(47), Abstract B42A-0107, 2001
  • Responses of creosote bush (Larrea tridentata) to patches of water and nitrogen under different atmospheric CO2 concentrations. - 85th Annual Meeting Snowbird, 2000 - UT
  • Responses of two dominant Mojave Desert shrubs to patches of water and nitrogen. - Great Basin Biological Research Conference , 1999 - Reno, NV

Selected Contracts, Fellowships, Grants and Sponsored Research

  • State of Alaska Division of Air Quality: Amendment to MOA for Mercury and Trace Metals Backtrajectory Study (), -
    Obrist, D. (Principal), Pearson, C. (Co-Principal)
  • State of Alaska Division of Air Quality: Memorandum of Agreement for Mercury and Trace Metals Backtrajectory Study. (), -
    Obrist, D. (Principal), Pearson , C. (Co-Principal)
  • DOE/Office of Science Program Office: Office of Biological and Environmental Research: Systematic Investigation of the Biogeochemical Stability of Iron Oxide-Bound Organic Carbon: Linking Redox Cycles and Carbon Persistence (), -
    Obrist, D. (Co-Principal), Yang, Y. (Principal), Roden, E.E. (Co-Principal), Kersting, A.B. (Co-Principal), Gu, B. (Co-Principal)
  • NASA Experimental Program to Stimulate Competitive Research (EPSCoR): Building Capacity in Interdisciplinary Snow Sciences for a Changing World (), -
    Obrist, D. (Principal), S, T. (Co-Principal), L, H. (Co-Principal), G, F. (Co-Principal)
  • U.S. NSF: Collaborative Research: Soil-Snow-Atmosphere Exchange of Mercury in the Interior Arctic Tundra (), -
    Obrist, D. (Principal), Helmig, D. (Co-Principal)
  • U.S. NSF: Dynamics of Coupled Natural-Human Systems (CNH): Managing Impacts of Global Transport of Atmosphere-Surface Exchangeable Pollutants in the Context of Global Change (), -
    Obrist, D. (Principal), Perlinger, J. (Principal), Norman, E. (Co-Principal), Selin, N. (Co-Principal), Wu, S. (Co-Principal)
  • USGS 2013 State Water Research Institute Program: Estimation of atmospheric wet and dry deposition of nutrients to Lake Tahoe snowpack and watersheds (), -
    Obrist, D. (Co-Principal), Schumer, R. (Principal)
  • California Institute of Technology, NASA/Jet Propulsion Laboratory: Subcontract: Implications of Arctic Sea Ice Reduction on Tropospheric Bromine, Ozone, and Mercury Chemical Process, Transport, and Distribution (), -
    Obrist, D. (Principal), Moore, C. (Co-Principal)
  • DRI Division of Atmospheric Sciences EDGES grant: Development of a cold plate sampler to measure atmospheric mercury and volatile organic compounds (), -
    Obrist, D. (Co-Principal), Moore, C. (Principal)
  • U.S. NSF: Collaborative Research: Reno Mercury Inter-comparison Experiment (), -
    Obrist, D. (Principal), Moosmuller, H. (Co-Principal)
  • USDA Forest Service (SNPLMA Round 10): Particulate Emissions from Biomass Burning: Quantification of the Contributions from Residential Wood Combustion, Forest Fires, and Prescribed Fires (), -
    Obrist, D. (Principal), Gertler, A. (Co-Principal), Zelinska, B. (Co-Principal)
  • DRI IPA: Atmospheric mercury sequestration and storage in Arctic carbon-rich soils (), -
    Obrist, D. (Principal)
  • U.S. NSF: Major Research Instrumentation (MRI): Development of a Cavity Ring-Down Sensor for Real-Time Measurement of Mercury Concentrations and Fluxes (), -
    Obrist, D. (Principal), Moosmuller, H. (Co-Principal), Fain, X. (Co-Principal), Hallar, A.G. (Co-Principal)
  • U.S. NSF: Upgrades to Storm Peak Laboratory, a High Elevation Atmospheric Research and Education Station (), -
    Obrist, D. (Co-Principal), Hallar, A.G. (Principal), Lowenthal, D. (Co-Principal), McCubbin, I. (Co-Principal), Moser, D. (Co-Principal)
  • DRI VPR office (Substantial Effort Grant): Air-snow exchange of mercury at Summit, Greenland: impact on the tropospheric reservoir and implications for long-term records preserved in ice cores (), -
    Obrist, D. (Co-Principal), Fain, X. (Principal)
  • Nevada NASA EPSCoR: Observations of reactive halogens and speciated mercury at a high-elevation observation platform to characterize the oxidative capacity of the troposphere (), -
    Obrist, D. (Principal), Hallar, G. (Co-Principal), Volkamer, R. (Co-Principal)
  • State of Colorado Air Pollution Control Division: Atmospheric mercury levels and impact of Asian long-range transport at Storm Peak Laboratory in Steamboat Springs, Colorado (), -
    Obrist, D. (Principal), Hallar, G. (Co-Principal)
  • U.S. NSF Atmospheric Chemistry: Mercury Oxidation and Depletion in the Reactive Halogen Enriched Troposphere of the Dead Sea (), -
    Obrist, D. (Principal), Luria, M. (Co-Principal)
  • Lawrence Foundation: Impact of Atmospheric Mercury on Rocky Mountain Region (), -
    Obrist, D. (Co-Principal), Hallar, G. (Principal)
  • U.S. EPA STAR Consequences of Global Change for Air Quality: Effects of global change on the atmospheric mercury burden and mercury sequestration through changes in ecosystem carbon pools (), -
    Obrist, D. (Principal), Johnson, D.W. (Co-Principal), Lindberg, S.E. (Co-Principal)
  • Desert Research Institute, Research Enhancement Program: Acquisition of a Tekran 2537A Mercury Vapor Analyzer (), -
    Obrist, D. (Principal), Moosmuller, H. (Co-Principal)
  • Desert Research Institute, Research Enhancement Program: Atmospheric mercury monitoring at DRI’s Storm Peak Laboratory to determine the fate of East Asian atmospheric mercury pollution during continental transport (), -
    Obrist, D. (Principal), Hallar, G. (Co-Principal)
  • DRI IPA: Atmospheric mercury emissions and mercury contamination due to modern gold mining in Nevada (), -
    Obrist, D. (Principal), Moosmuller, H. (Co-Principal)
  • U.S. NSF EPSCoR Proof-of-concept Program: Scaling environmental processes in heterogeneous arid soils (SEPHAS): Application of a 222Rn/H2O method to measure nighttime evapotranspiration in arid ecosystems to complement and scale-up conventional measurement methods (), -
    Obrist, D. (Principal), Jasoni, R. (Co-Principal), Arnone, J.A. (Co-Principal)
  • U.S. NSF EPSCoR: Proof of Concept Program: Development of an Optical Method for Sensing Mercury in Real Time with Below Background Sensitivity (), -
    Obrist, D. (Other), Moosmuller, H. (Principal), Arnott, W.P. (Co-Principal)
  • U.S. NSF Small Grant for Exploratory Research (SGER): Atmospheric mercury (Hg) emission from combustion of biomass (), -
    Obrist, D. (Principal)
  • Swiss National Science Foundation: Hg0 fluxes and reductive processes in the Alps (), -
    Obrist, D. (Principal), Alewell, C. (Co-Principal)
  • University of Basel: Small Research Grant (), -
    Obrist, D. (Principal)
  • Geological Society of America Research Grant (), -
    Obrist, D. (Principal)