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Evaluation and intercomparison of the atmospheric CO2 retrievals from measurements of AIRS, IASI, SCIAMACHY and GOSAT | IEEE Conference Publication | IEEE Xplore

Evaluation and intercomparison of the atmospheric CO2 retrievals from measurements of AIRS, IASI, SCIAMACHY and GOSAT


Abstract:

Quantifications of the differences among currently available CO2 products are very necessary for deeply understanding each product and their joint use. A spatio-temporal ...Show More

Abstract:

Quantifications of the differences among currently available CO2 products are very necessary for deeply understanding each product and their joint use. A spatio-temporal matching strategy has been proposed in this work to allow the CO2 products from AIRS, IASI, GOSAT and SCIAMACHY to be physically comparable by accounting for the a priori CO2 profiles employed in retrieval stage, averaging kernel functions and atmospheric pressure profiles etc. Based on this, these CO2 products are intercompared in terms of magnitudes of CO2 concentrations and their spatio-temporal distributions. The results show that relative large discrepancies are detected among these products, both in specific values of CO2 concentrations and the spatio-temporal distributions, implying more efforts should be made to fully understand the differences of such measurements and to better constrain the uncertainties in CO2 retrievals from space in the future.
Date of Conference: 22-27 July 2012
Date Added to IEEE Xplore: 10 November 2012
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Conference Location: Munich, Germany

References

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