T
Todd Sowers
Researcher at Pennsylvania State University
Publications - 75
Citations - 12410
Todd Sowers is an academic researcher from Pennsylvania State University. The author has contributed to research in topics: Ice core & Glacial period. The author has an hindex of 45, co-authored 74 publications receiving 11454 citations. Previous affiliations of Todd Sowers include Lamont–Doherty Earth Observatory & University of Rhode Island.
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Journal ArticleDOI
Simultaneous stable isotope analysis of methane and nitrous oxide on ice core samples
Célia Sapart,C. J. van der Veen,I. Vigano,M. Brass,R. S. W. van de Wal,Michael Bock,Hubertus Fischer,Todd Sowers,Christo Buizert,Peter Sperlich,Thomas Blunier,Melanie Behrens,Jochen Schmitt,Barbara Seth,Thomas Röckmann +14 more
TL;DR: In this paper, a dry extraction system for combined CH4 and N2O stable isotope analysis from ice core air, using an ice grating device, is presented, which allows simultaneous anal- ysis of D(CH4) or 13 C (CH4), together with 15 N(N2O), 18 O(N 2O), and 15 N (NO + fragment) on a single ice core sample, using two isotope mass spectrometry systems.
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Assessment of diffusive isotopic fractionation in polar firn, and application to ice core trace gas records
TL;DR: In this article, a semi-empirical method was proposed to estimate the magnitude of diffusive fractionation in the ice core record using only commonly available ice core data, which is not subject to the uncertainties inherent to estimating the accumulation rate, temperature, close-off depth and depthdiffusivity relationship back in time.
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Interlaboratory comparison of δ13C and δd measurements of atmospheric CH4 for combined use of data sets from different laboratories
Taku Umezawa,Taku Umezawa,Carl A. M. Brenninkmeijer,Thomas Röckmann,Carina van der Veen,Stanley C. Tyler,Stanley C. Tyler,Ryo Fujita,Shinji Morimoto,Shinji Morimoto,Shuji Aoki,Todd Sowers,Jochen Schmitt,Michael Bock,Jonas Beck,Hubertus Fischer,S. E. Michel,Bruce H. Vaughn,John B. Miller,James W. C. White,Gordon Brailsford,Hinrich Schaefer,Peter Sperlich,Willi A. Brand,Michael Rothe,Thomas Blunier,David Lowry,Rebecca Fisher,Euan G. Nisbet,Andrew L. Rice,Peter Bergamaschi,Cordelia Veidt,Ingeborg Levin +32 more
TL;DR: In this paper, the authors report results from a worldwide interlaboratory comparison of samples among laboratories that measure (or measured) stable carbon and hydrogen isotope ratios of atmospheric CH4 (δ13C-CH4 and δD-Ch4).
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On the interference of Kr during carbon isotope analysis of methane using continuous-flow combustion-isotope ratio mass spectrometry
Jochen Schmitt,Barbara Seth,Michael Bock,C. J. van der Veen,Lars Möller,Célia Sapart,M. Prokopiou,Todd Sowers,Thomas Röckmann,Hubertus Fischer +9 more
TL;DR: In this paper, the atmospheric trace gas krypton (Kr) can severely interfere during the mass spectrometric measurement, leading to significant biases in δ13C of CH4.
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Water column and sediment stable carbon isotope biogeochemistry of permanently redox‐stratified Fayetteville Green Lake, New York, U.S.A.
Jeff R. Havig,Trinity L. Hamilton,Michael L. McCormick,Brianna McClure,Todd Sowers,Bruce Wegter,Lee R. Kump +6 more
TL;DR: In this article, the concentration and stable isotopic signal of inorganic and organic carbon in permanently redox-stratified Fayetteville Green Lake (FGL), New York were analyzed.