ACPD Atmospheric Chemistry and Physics Discussions ACPD 1680-7375 Copernicus GmbH Göttingen, Germany 10.5194/acpd-8-19201-2008 Identifying convective transport of carbon monoxide by comparing remotely sensed observations from TES with cloud modeling simulations Halland J. J. 1 Fuelberg H. E. 1 Pickering K. E. 2 Luo M. 3 Department of Meteorology, Florida State University, Tallahassee, Florida USA NASA Goddard Space Flight Center, Greenbelt, Maryland USA Jet Propulsion Laboratory, Pasadena, California USA 14 11 2008 8 6 19201 19247 This is an open-access article ditributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. This article is available from http://www.atmos-chem-phys-discuss.net/8/19201/2008/acpd-8-19201-2008.html The full text article is available as a PDF file from http://www.atmos-chem-phys-discuss.net/8/19201/2008/acpd-8-19201-2008.pdf

Understanding the mechanisms that transport pollutants from the surface to the free atmosphere is important for determining the atmosphere's chemical composition. This study quantifies the vertical transport of tropospheric carbon monoxide (CO) by deep mesoscale convective systems and assesses the ability of the satellite-borne Tropospheric Emission Spectrometer (TES) to detect the resulting enhanced CO in the upper atmosphere. A squall line that is similar to one occurring during NASA's INTEX-B mission is simulated using a typical environmental wind shear profile and the 2-D Goddard Cumulus Ensemble model. The simulation provides post-convection CO profiles. The structure of the simulated squall line is examined, and its vertical transport of CO is quantified. Then, TES' ability to resolve the convectively modified CO distribution is documented using a "clear-sky" retrieval scheme. Results show that the simulated squall line transports the greatest mass of CO in the upper levels, with a value of 96 t upward and 67 t downward at 300 hPa. Maximum updraft speed is found to be unimportant in determining the net CO flux transported by a storm, but is important in determining the altitude to which the storm transports the boundary layer CO. Results indicate that TES has sufficient sensitivity to resolve convectively lofted CO, as long as the retrieval scene is cloud-free. TES swaths located immediately downwind of squall lines have the greatest chance of sensing convective transport because the impact of clouds on retrieval quality becomes less. A note of caution is to always analyze TES-derived CO data (or data from any satellite sensor) together with the retrieval averaging kernel diagonals or other parameters describing the information content of the retrieval.

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