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Christoph A. Keller
Researcher at Universities Space Research Association
Publications - 59
Citations - 2259
Christoph A. Keller is an academic researcher from Universities Space Research Association. The author has contributed to research in topics: Air quality index & Orbifold. The author has an hindex of 19, co-authored 59 publications receiving 1306 citations. Previous affiliations of Christoph A. Keller include Swiss Federal Laboratories for Materials Science and Technology & Goddard Space Flight Center.
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Journal ArticleDOI
Current and future global climate impacts resulting from COVID-19
Piers M. Forster,Harriet I. Forster,Mat J. Evans,Matthew Gidden,Chris D. Jones,Christoph A. Keller,Christoph A. Keller,Robin Lamboll,Corinne Le Quéré,Joeri Rogelj,Joeri Rogelj,Deborah Rosen,Carl-Friedrich Schleussner,Thomas Richardson,Christopher J. Smith,Christopher J. Smith,Steven Turnock,Steven Turnock +17 more
TL;DR: In this paper, the authors estimate that the direct effect of the pandemic-driven response will be negligible, with a cooling of around 0.01 ± 0.005°C by 2030 compared to a baseline scenario that follows current national policies.
Journal ArticleDOI
Ozone and organic nitrates over the eastern United States: Sensitivity to isoprene chemistry
Jingqiu Mao,Jingqiu Mao,Fabien Paulot,Daniel J. Jacob,Ronald C. Cohen,John D. Crounse,Paul O. Wennberg,Christoph A. Keller,Rynda C. Hudman,Rynda C. Hudman,M. P. Barkley,Larry W. Horowitz +11 more
TL;DR: In this paper, a new isoprene oxidation mechanism was implemented in a global 3D chemical transport model (GEOS-Chem) to achieve an unbiased simulation of ozone in the boundary layer and the free troposphere.
Journal ArticleDOI
HEMCO v1.0: A Versatile, ESMF-Compliant Component for Calculating Emissions in Atmospheric Models
Christoph A. Keller,Michael S. Long,Robert M. Yantosca,A. da Silva,Steven Pawson,Daniel J. Jacob +5 more
TL;DR: By providing a widely applicable framework for specifying constituent emissions, HEMCO is designed to ease sensitivity studies and model comparisons, as well as inverse modeling in which emissions are adjusted iteratively.
Journal ArticleDOI
Erratum: Publisher Correction: Current and future global climate impacts resulting from COVID-19.
Piers M. Forster,Harriet I. Forster,Mat J. Evans,Matthew Gidden,Chris D. Jones,Christoph A. Keller,Robin Lamboll,Corinne Le Quéré,Joeri Rogelj,Joeri Rogelj,Deborah Rosen,Carl-Friedrich Schleussner,Thomas Richardson,Christopher J. Smith,Christopher J. Smith,Steven Turnock,Steven Turnock +16 more
TL;DR: An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Journal ArticleDOI
Global Sources of Fine Particulate Matter: Interpretation of PM2.5 Chemical Composition Observed by SPARTAN using a Global Chemical Transport Model
Crystal L. Weagle,Graydon Snider,Chi Li,Aaron van Donkelaar,Sajeev Philip,Sajeev Philip,Paul Bissonnette,Jaqueline Burke,John Jackson,Robyn N. C. Latimer,Emily Stone,Ihab Abboud,Clement Akoshile,Nguyen Xuan Anh,Jeffrey R. Brook,Aaron Cohen,Jinlu Dong,Mark D. Gibson,D. Griffith,Kebin B. He,Brent N. Holben,Ralph A. Kahn,Christoph A. Keller,Christoph A. Keller,Jong Sung Kim,Nofel Lagrosas,Puji Lestari,Yeo Lik Khian,Yang Liu,Eloise A. Marais,J. Vanderlei Martins,Amit Kumar Misra,Ulfi Muliane,Rizki Pratiwi,Eduardo Quel,Abdus Salam,Lior Segev,Sachchida Nand Tripathi,Chien Wang,Qiang Zhang,Michael Brauer,Yinon Rudich,Randall V. Martin,Randall V. Martin +43 more
TL;DR: Simulation-measurement biases for ammonium nitrate and dust identify uncertainty in agricultural and crustal sources as well as insight into sources and processes that influence the global spatial variation in PM2.5 composition.