K
K. M. Spencer
Researcher at California Institute of Technology
Publications - 10
Citations - 444
K. M. Spencer is an academic researcher from California Institute of Technology. The author has contributed to research in topics: NOx & Chemical transport model. The author has an hindex of 6, co-authored 10 publications receiving 402 citations.
Papers
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Journal ArticleDOI
Chemistry of hydrogen oxide radicals (HO x ) in the Arctic troposphere in spring
J. Mao,Daniel J. Jacob,Mathew J. Evans,Jennifer R. Olson,Xinrong Ren,William H. Brune,J. M. St. Clair,John D. Crounse,K. M. Spencer,M. R. Beaver,Paul O. Wennberg,Michael J. Cubison,Jose-Luis Jimenez,Alan Fried,Petter Weibring,James Walega,Samuel R. Hall,Andrew J. Weinheimer,Ronald C. Cohen,G. Chen,James H. Crawford,Cameron S. McNaughton,Antony D. Clarke,Lyatt Jaeglé,Jenny A. Fisher,Robert M. Yantosca,P. Le Sager,P. Le Sager,C. Carouge +28 more
TL;DR: In this paper, the authors used observations from the April 2008 NASA ARCTAS aircraft campaign to the North American Arctic, interpreted with a global 3D chemical transport model (GEOS-Chem), to better understand the sources and cycling of hydrogen oxide radicals (HOx≡H+OH+peroxy radicals) and their reservoirs (HOy≡HOx+peroxides) in the springtime Arctic atmosphere.
Journal ArticleDOI
Importance of biogenic precursors to the budget of organic nitrates: observations of multifunctional organic nitrates by CIMS and TD-LIF during BEARPEX 2009
M. R. Beaver,M. R. Beaver,J. M. St. Clair,Fabien Paulot,K. M. Spencer,John D. Crounse,Brian W. LaFranchi,Brian W. LaFranchi,Kyung-Eun Min,Sally E. Pusede,Paul J. Wooldridge,Gunnar W. Schade,Changhyoun Park,Changhyoun Park,Ronald C. Cohen,Paul O. Wennberg +15 more
TL;DR: In this article, the authors describe observations obtained during the BEARPEX 2009 experiment including ΣANs and a suite of multifunctional organic nitrates including isoprene derived hydroxynitrates, oxidation products of those nitrates, 2-methyl-3-buten-2-ol (MBO) derived hydoxide, and monoterpene nitrates.
Journal ArticleDOI
Global and regional effects of the photochemistry of CH 3 O 2 NO 2 : evidence from ARCTAS
Eleanor C. Browne,Anne E. Perring,Anne E. Perring,Anne E. Perring,Paul J. Wooldridge,Eric C. Apel,Samuel R. Hall,L. G. Huey,J. Mao,K. M. Spencer,J. M. St. Clair,Andrew J. Weinheimer,Armin Wisthaler,Ronald C. Cohen +13 more
TL;DR: In this paper, the authors investigated the regional and global effects of CH3O2NO2 by including its chemistry in the GEOS-Chem 3-D global chemical transport model.
Journal ArticleDOI
In situ measurements of tropospheric volcanic plumes in Ecuador and Colombia during TC4
Simon Carn,Karl D. Froyd,Bruce E. Anderson,Paul O. Wennberg,John D. Crounse,K. M. Spencer,Jack E. Dibb,Nickolay A. Krotkov,Edward V. Browell,J. W. Hair,G. Diskin,G. W. Sachse,Stephanie A. Vay +12 more
TL;DR: A NASA DC-8 research aircraft penetrated tropospheric gas and aerosol plumes sourced from active volcanoes in Ecuador and Colombia during the Tropical Composition, Cloud and Climate Coupling (TC^4) mission in July-August 2007.
Journal ArticleDOI
Inferring ozone production in an urban atmosphere using measurements of peroxynitric acid
K. M. Spencer,D. McCabe,D. McCabe,John D. Crounse,Jennifer R. Olson,James H. Crawford,Andrew J. Weinheimer,D. J. Knapp,Denise D. Montzka,Christopher A. Cantrell,Rebecca S. Hornbrook,Roy L. Mauldin,Paul O. Wennberg +12 more
TL;DR: In this article, peroxynitric acid (HO2NO2) measurements were obtained simultaneously with those of NO and NO2 to provide a sensitive measure of the ozone photochemical production rate.