Deuterium propagation through the atmospheric carbon cycle: Experiment, theory and modeling
Publikation: Bidrag til bog/antologi/rapport › Konferencebidrag i proceedings › Forskning › fagfællebedømt
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Deuterium propagation through the atmospheric carbon cycle : Experiment, theory and modeling. / Johnson, Matthew S.
American Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers. 2009. (ACS National Meeting Book of Abstracts).Publikation: Bidrag til bog/antologi/rapport › Konferencebidrag i proceedings › Forskning › fagfællebedømt
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TY - GEN
T1 - Deuterium propagation through the atmospheric carbon cycle
T2 - 237th National Meeting and Exposition of the American Chemical Society, ACS 2009
AU - Johnson, Matthew S.
PY - 2009/12/1
Y1 - 2009/12/1
N2 - There are significant questions regarding the sources and sinks of atmospheric trace gases including methane and hydrogen. These uncertainties complicate efforts to predict climate change. Isotopic analysis provides additional information about trace gas sources, sinks and reactions that is not available from other methods. Using a combination of laboratory kinetics, spectroscopy and theory we have mapped the deuterium isotope effects in the atmospheric oxidation reactions of methane and can now provide the first detailed picture of deuterium propagation in the atmosphere. Points of interest include the branching ratio for hydrogen abstraction by O2 from CH2DO and the pressure dependence of the kinetic isotope effect when formaldehyde is photolyzed to produce molecular hydrogen. Deuterium isotope effects are large, giving an easily measured parameter. We describe how deuterium enrichments in the field will be sensitive to pressure, temperature, actinic flux and the oxidant field.
AB - There are significant questions regarding the sources and sinks of atmospheric trace gases including methane and hydrogen. These uncertainties complicate efforts to predict climate change. Isotopic analysis provides additional information about trace gas sources, sinks and reactions that is not available from other methods. Using a combination of laboratory kinetics, spectroscopy and theory we have mapped the deuterium isotope effects in the atmospheric oxidation reactions of methane and can now provide the first detailed picture of deuterium propagation in the atmosphere. Points of interest include the branching ratio for hydrogen abstraction by O2 from CH2DO and the pressure dependence of the kinetic isotope effect when formaldehyde is photolyzed to produce molecular hydrogen. Deuterium isotope effects are large, giving an easily measured parameter. We describe how deuterium enrichments in the field will be sensitive to pressure, temperature, actinic flux and the oxidant field.
UR - http://www.scopus.com/inward/record.url?scp=78649514317&partnerID=8YFLogxK
M3 - Article in proceedings
AN - SCOPUS:78649514317
SN - 9780841224414
T3 - ACS National Meeting Book of Abstracts
BT - American Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
Y2 - 22 March 2009 through 26 March 2009
ER -
ID: 236121808