Midtropospheric CO2 concentration retrieval from AIRS observations in the tropics
- 4 September 2004
- journal article
- Published by American Geophysical Union (AGU) in Geophysical Research Letters
- Vol. 31 (17)
- https://doi.org/10.1029/2004gl020141
Abstract
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).This publication has 12 references indexed in Scilit:
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