Identifying convective transport of carbon monoxide by comparing remotely sensed observations from TES with cloud modeling simulations J. J. Halland1, H. E. Fuelberg1, K. E. Pickering2, and M. Luo3 1Department of Meteorology, Florida State University, Tallahassee, Florida, USA 2NASA Goddard Space Flight Center, Greenbelt, Maryland, USA 3Jet Propulsion Laboratory, Pasadena, California, USA
Abstract. 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. 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 kernels that describe the information content
of the retrieval.
Citation: Halland, J. J., Fuelberg, H. E., Pickering, K. E., and Luo, M.: Identifying convective transport of carbon monoxide by comparing remotely sensed observations from TES with cloud modeling simulations, Atmos. Chem. Phys., 9, 4279-4294, doi:10.5194/acp-9-4279-2009, 2009.