Computer Science – Sound
Scientific paper
Sep 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3117106c&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 17, CiteID L17106
Computer Science
Sound
24
Atmospheric Composition And Structure: Evolution Of The Atmosphere, Atmospheric Composition And Structure: Geochemical Cycles, Global Change: Atmosphere (0315, 0325), Global Change: Remote Sensing
Scientific paper
Midtropospheric carbon dioxide (CO2) concentration is retrieved in the tropics [20S:20N], over sea, at night, for the period April to October 2003 from the Atmospheric Infrared Sounder (AIRS) observations. The method relies on a non-linear regression inference scheme using neural networks. A rough estimate of the mean precision of the method is about 2.5 ppmv (0.7%). The retrieved seasonal cycle and its latitudinal dependence agree well with aircraft CO2 in situ measurements made at the same altitude range. Maps produced on a monthly basis at a resolution of 15° × 15°, although not yet fully understood, show good agreement with known characteristics of CO2 distribution reflecting both atmospheric transport and surface fluxes (fossil fuel emissions, biomass burning, air-surface gas exchanges).
Armante Raymond
Chedin Alain
Crevoisier Cyril
Heilliette S.
Scott Noelle A.
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