Statistics – Computation
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufm.h32b0578h&link_type=abstract
American Geophysical Union, Fall Meeting 2003, abstract #H32B-0578
Statistics
Computation
0312 Air/Sea Constituent Fluxes (3339, 4504), 0325 Evolution Of The Atmosphere, 1655 Water Cycles (1836), 1818 Evapotranspiration, 1878 Water/Energy Interactions
Scientific paper
The profiles of temperature and moisture in the planetary boundary layer (PBL), or that region above the surface within the scale-height of water vapor (e.g., 1 to 2 km above the surface) are extremely important to water transport and the cloud-surface energy budget. The Atmospheric Infrared Sounder (AIRS), a very precise, medium-resolution spectrometer on the Aqua spacecraft, is providing profiles of atmospheric temperature and water vapor at vertical resolution of one to two kilometers. We demonstrate that AIRS is sensitive to variability in PBL temperature and humidity structures and that the vertical structure can be quantitatively resolved. Our studies focus on the response of weak water vapor lines of varying ground state energies as well as nearby continuum regions between 800-1200 wavenumbers. Atmospheric temperature and moisture profiles derived from in situ observations are used in line-by-line radiative transfer model computations, where the spectral response functions are convolved in order to compare with the AIRS spectral radiances. We describe a capability to detect and potentially quantify variable mixed layer thickness, moisture stratification and temperature inversion through comparisons of radiative transfer calculations with AIRS observations. The results may be especially relevant for studies of the stable marine boundary, stratus evolution and frontal dynamics.
Chen Leon L.
Hagan D. E.
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