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| Titel |
Application of KLIMA/G-POD algorithm to CO2 retrieval from IASI/METOP-A observations and comparison with GOSAT/TANSO-FTS products |
| VerfasserIn |
L. M. Laurenza, U. Cortesi, S. Del Bianco, M. Gai |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250058945
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| Zusammenfassung |
| The ESA research project “Application of KLIMA algorithm to CO2 retrieval from IASI/METOP-A observations and comparison with GOSAT/TANSO-FTS products” aims at the develop of a dedicated software, based on the KLIMA inversion algorithm (originally proposed by IFAC-CNR for the ESA Earth Explorer Mission), optimally suited for CO2 retrieval and integrated into the ESA GRID-based operational environment G-POD (Grid Processing On-Demand) to processing Level-1 data acquired by the IASI instrument onboard the METOP-A satellite and to perform a comparison and cross-validation of GOSAT TANSO-FTS Level-2 data. Optimized versions of the KLIMA-IASI code have been investigated, aiming at developing a non-operation retrieval code with capabilities that meet the requirements of cross validation with GOSAT TANSO-FTS products and with adequate features for the integration on the G-POD system. For the performance of the retrieval a target accuracy of 0.3% (1 ppmv out of 370 ppmv) on regional scales (1000 x 1000 km) at monthly intervals, which is consistent with the requirements of the GOSAT mission for CO2 products, was assumed as reference value. The required maximum program size was set to 1 Gbyte and the running time was limited with the aim of processing 1 orbit of IASI data in 1 day when using G-POD computing resources. The KLIMA-IASI retrieval code has been successfully completed and has been integrated on the G-POD operational environment and now the code is available to all interested users for bulk processing of IASI data. After the procurement of a consolidated version of the KLIMA-IASI/G- POD retrieval code it was possible to start the processing of IASI spectra and for comparison and cross-validation of KLIMA-IASI CO2 products with GOSAT/TANSO-FTS operational products. Using the KLIMA inversion code integrated into the ESA G-POD, it was possible to perform an extensive inter-comparison and cross-validation of a selected set of IASI measurements collocated with GOSAT TANSO-FTS observations. The GOSAT CO2 total column values were compared with the CO2 total column retrieved from IASI Level-1C data. In this work we will describe in details the strategy adopted for the comparison and we will show the results of the cross-validation activity. |
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