HR: 09:15h
AN: A11F-06    [Abstracts]
TI: A Four-Year Global Climatology of Mid-Tropospheric Carbon Dioxide from AIRS
AU: * Strow, L
EM: strow@umbc.edu
AF: University of Maryland Baltimore County, Physics Department 1000 Hilltop Circle, Baltimore, MD 21250, United States
AU: Hannon, S
EM: hannon@umbc.edu
AF: University of Maryland Baltimore County, Physics Department 1000 Hilltop Circle, Baltimore, MD 21250, United States
AB: A 4-year zonally averaged mid-tropospheric climatology of carbon dioxide spanning -60 to +60 degrees, presently over ocean only, has been derived from the Atmospheric Infrared Sounder (AIRS) with estimated accuracies of about 0.5 ppm, based on in-situ aircraft measurements. This work uses AIRS channels with CO₂ sensitivity functions that peak around 550 hPa, significantly lower than previous studies that use channels peaking in the 200-300 hPa region. Comparisons of this climatology with other data shows rectification of the boundary layer seasonal signal as a function of latitude, phase differences between boundary layer and mid-tropospheric seasonal cycles, and possible variations of 4-year growth rates with latitude. Comparisons to the NOAA Marine Boundary Layer smoothed data highlight transport processes for carbon dioxide into the mid-troposphere.
DE: 0322 Constituent sources and sinks
DE: 0360 Radiation: transmission and scattering
DE: 0480 Remote sensing
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting