Search Results - "Rahn, Thom"

Ultrahigh-resolution FT-ICR mass spectrometry characterization of α-pinene ozonolysis SOA by Putman, Annie L., Offenberg, John H., Fisseha, Rebeka, Kundu, Shuvashish, Rahn, Thom A., Mazzoleni, Lynn R.

“…Secondary organic aerosol (SOA) of α-pinene ozonolysis with and without hydroxyl radical scavenging hexane was characterized by ultrahigh-resolution Fourier…”
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Early exposure to UV radiation overshadowed by precipitation and litter quality as drivers of decomposition in the northern Chihuahuan Desert by Hewins, Daniel B, Lee, Hanna, Barnes, Paul W, McDowell, Nathan G, Pockman, William T, Rahn, Thom, Throop, Heather L

“…Dryland ecosystems cover nearly 45% of the Earth's land area and account for large proportions of terrestrial net primary production and carbon pools. However,…”
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A shallow subsurface controlled release facility in Bozeman, Montana, USA, for testing near surface CO2 detection techniques and transport models by Spangler, Lee H., Dobeck, Laura M., Repasky, Kevin S., Nehrir, Amin R., Humphries, Seth D., Barr, Jamie L., Keith, Charlie J., Shaw, Joseph A., Rouse, Joshua H., Cunningham, Alfred B., Benson, Sally M., Oldenburg, Curtis M., Lewicki, Jennifer L., Wells, Arthur W., Diehl, J. Rodney, Strazisar, Brian R., Fessenden, Julianna E., Rahn, Thom A., Amonette, James E., Barr, Jon L., Pickles, William L., Jacobson, James D., Silver, Eli A., Male, Erin J., Rauch, Henry W., Gullickson, Kadie S., Trautz, Robert, Kharaka, Yousif, Birkholzer, Jens, Wielopolski, Lucien

“…A controlled field pilot has been developed in Bozeman, Montana, USA, to study near surface CO 2 transport and detection technologies. A slotted horizontal…”
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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 by Obrist, Daniel, Hallar, A. Gannet, McCubbin, Ian, Stephens, Britton B., Rahn, Thom

“…The goal of this study was to test if Asian long-range transport (ALRT) of pollutants leads to enhanced levels of atmospheric mercury in the Colorado Rocky…”
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Evaporation dominates evapotranspiration on Alaska's Arctic Coastal Plain by Young-Robertson, Jessica M., Raz-Yaseef, Naama, Cohen, Lily R., Newman, Brent, Rahn, Thom, Sloan, Victoria, Wilson, Cathy, Wullschleger, Stan D.

“…The dynamics of evapotranspiration (ET), such as the partitioning to evaporation and transpiration, of polygonal ground on the Arctic Coastal Plain are not…”
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Multiscale observations of CO₂, ¹³CO₂, and pollutants at Four Corners for emission verification and attribution by Lindenmaier, Rodica, Dubey, Manvendra K., Henderson, Bradley G., Butterfield, Zachary T., Herman, Jay R., Rahn, Thom, Lee, Sang-Hyun

“…There is a pressing need to verify air pollutant and greenhouse gas emissions from anthropogenic fossil energy sources to enforce current and future…”
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A reassessment of the global isotopic budget of atmospheric nitrous oxide by Rahn, Thom, Wahlen, Martin

“…A simple box model is developed which accounts for the natural and anthropogenic sources and sinks of tropospheric nitrous oxide. Stable isotopic terms are…”
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Measuring diurnal cycles of evapotranspiration in the Arctic with an automated chamber system by Cohen, Lily R., Raz-Yaseef, Naama, Curtis, J. Bryan, Young, Jessica M., Rahn, Thom A., Wilson, Cathy J., Wullschleger, Stan D., Newman, Brent D.

“…Properly quantifying evapotranspiration (ET) is a critical step in determining water and energy balances, especially in Arctic landscapes where spatial and…”
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Extreme deuterium enrichment in stratospheric hydrogen and the global atmospheric budget of H2 by RAHN, Thorn, EILER, John M, BOERING, Kristle A, WENNBERG, Paul O, MCCARTHY, Michael C, TYLER, Stanley, SCHAUFFLER, Sue, DONNELLY, Stephen, ATLAS, Elliot

“…Molecular hydrogen (H2) is the second most abundant trace gas in the atmosphere after methane (CH4). In the troposphere, the D/H ratio of H2 is enriched by 120…”
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Stable Isotope Enrichment in Stratospheric Nitrous Oxide by Rahn, Thom, Wahlen, Martin

“…Nitrous oxide is a greenhouse gas that also plays a role in the cycling of stratospheric ozone. Air samples from the lower stratosphere exhibit…”
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D/H ratios of atmospheric H2 in urban air: results using new methods for analysis of nano-molar H2 samples by Rahn, Thom, Kitchen, Nami, Eiler, John

“…We present the results of a study of the concentration and D/H ratio of molecular hydrogen from air in the Los Angeles Basin and adjacent San Gabriel…”
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Concentration and δD of molecular hydrogen in boreal forests: Ecosystem-scale systematics of atmospheric H2 by Rahn, Thom, Eiler, John M., Kitchen, Nami, Fessenden, Julianna E., Randerson, James T.

“…We examined the concentration and δD of atmospheric H2 in a boreal forest in interior Alaska to investigate the systematics of high latitude soil uptake at…”
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An accounting of C-based trace gas release during abiotic plant litter degradation by Lee, Hanna, Rahn, Thom, Throop, Heather

“…Recent studies showed that photochemical breakdown (photodegradation) of plant material accounts for a substantial portion of litter decomposition and…”
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Paired analyses of oxygen isotope and elemental ratios within individual shells of benthic foraminifera genus Uvigerina by Balestra, Barbara, Orland, Ian J., Fessenden-Rahn, Julianna, Gorski, Galen, Franks, Rob, Rahn, Thom, Paytan, Adina

“…We compare different methodologies (in situ and bulk) for obtaining oxygen isotope (δ18O) and elemental ratios in the benthic foraminifera genus Uvigerina from…”
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Experimental constraints on the stable-isotope systematics of CO2 ice/vapor systems and relevance to the study of Mars by Eiler, John M, Kitchen, Nami, Rahn, Thom A

“…Results are reported from an experimental investigation of isotopic fractionations of carbon and oxygen between CO2 ice and vapor on Mars at temperatures…”
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Methane Isotope Instrument Validation and Source Identification at Four Corners, New Mexico, United States by Arata, Caleb, Rahn, Thom, Dubey, Manvendra K

“…Measurements of δ13CH4 and CH4 concentration were made at a field site in Four Corners, New Mexico (FC), where we observed large sustained CH4 enhancements…”
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Unsaturation of vapour pressure inside leaves of two conifer species by Cernusak, Lucas A., Ubierna, Nerea, Jenkins, Michael W., Garrity, Steven R., Rahn, Thom, Powers, Heath H., Hanson, David T., Sevanto, Sanna, Wong, Suan Chin, McDowell, Nate G., Farquhar, Graham D.

“…Stomatal conductance ( g s ) impacts both photosynthesis and transpiration, and is therefore fundamental to the global carbon and water cycles, food…”
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Molecular formula composition of β-caryophyllene ozonolysis SOA formed in humid and dry conditions by Kundu, Shuvashish, Fisseha, Rebeka, Putman, Annie L., Rahn, Thom A., Mazzoleni, Lynn R.

“…We studied the molecular formula composition of six β-caryophyllene SOA samples using ultrahigh resolution Fourier transform ion cyclotron resonance mass…”
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Soil moisture and soil-litter mixing effects on surface litter decomposition: A controlled environment assessment by Lee, Hanna, Fitzgerald, Jessica, Hewins, Daniel B., McCulley, Rebecca L., Archer, Steven R., Rahn, Thom, Throop, Heather L.

“…Recent studies suggest the long-standing discrepancy between measured and modeled leaf litter decomposition in drylands is, in part, the result of a unique…”
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Evapotranspiration across plant types and geomorphological units in polygonal Arctic tundra by Raz-Yaseef, Naama, Young-Robertson, Jessica, Rahn, Thom, Sloan, Victoria, Newman, Brent, Wilson, Cathy, Wullschleger, Stan D., Torn, Margaret S.

“…•Microtopographic variations in polygonal tundra explain most spatial variation in ET.•ET from mosses and open water was twice as high as that from lichens and…”
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