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Interpreting Space-Based Trends in Carbon Monoxide with Multiple ModelsWe use a series of chemical transport model and chemistry climate model simulations to investigate the observed negative trends in MOPITT CO over several regions of the world, and to examine the consistency of timedependent emission inventories with observations. We find that simulations driven by the MACCity inventory, used for the Chemistry Climate Modeling Initiative (CCMI), reproduce the negative trends in the CO column observed by MOPITT for 2000-2010 over the eastern United States and Europe. However, the simulations have positive trends over eastern China, in contrast to the negative trends observed by MOPITT. The model bias in CO, after applying MOPITT averaging kernels, contributes to the model-observation discrepancy in the trend over eastern China. This demonstrates that biases in a model's average concentrations can influence the interpretation of the temporal trend compared to satellite observations. The total ozone column plays a role in determining the simulated tropospheric CO trends. A large positive anomaly in the simulated total ozone column in 2010 leads to a negative anomaly in OH and hence a positive anomaly in CO, contributing to the positive trend in simulated CO. These results demonstrate that accurately simulating variability in the ozone column is important for simulating and interpreting trends in CO.
Document ID
20160010366
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Strode, Sarah A.
(Universities Space Research Association Greenbelt, MD, United States)
Worden, Helen M.
(National Center for Atmospheric Research Boulder, CO, United States)
Damon, Megan
(Science Systems and Applications, Inc. Lanham, MD, United States)
Douglass, Anne R.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Duncan, Bryan N.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Emmons, Louisa K.
(National Center for Atmospheric Research Boulder, CO, United States)
Lamarque, Jean-Francois
(National Center for Atmospheric Research Boulder, CO, United States)
Manyin, Michael
(Science Systems and Applications, Inc. Lanham, MD, United States)
Oman, Luke D.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Rodriguez, Jose M.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Strahan, Susan E.
(Universities Space Research Association Greenbelt, MD, United States)
Tilmes, Simone
(National Center for Atmospheric Research Boulder, CO, United States)
Date Acquired
August 16, 2016
Publication Date
June 10, 2016
Publication Information
Publication: Atmospheric Chemistry and Physics
Publisher: Atmospheric Chemistry and Physics
Volume: 16
Issue: 11
e-ISSN: 1680-7324
Subject Category
Earth Resources And Remote Sensing
Report/Patent Number
GSFC-E-DAA-TN34769
Funding Number(s)
CONTRACT_GRANT: NNG11HP16A
CONTRACT_GRANT: NNG12HP08C
CONTRACT_GRANT: NNG12HP06C
Distribution Limits
Public
Copyright
Other
Keywords
carbon monoxide
MOPITT
trends

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