Comparison of Retrievals of CH4 and CO2 from IASI and GOSAT in the TIR for Nearly Coincident Measurements in the Arctic Summer
The comparison of different thermal infrared (TIR) nadir sounders is quite important for assessing their capabilities to retrieve reliable information on the concentration of greenhouse gases. However, the present satellite instruments able to provide such information are not many. While IASI (on Me...
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ftunivnantes:oai:HAL:hal-00993355v1 2023-05-15T15:15:03+02:00 Comparison of Retrievals of CH4 and CO2 from IASI and GOSAT in the TIR for Nearly Coincident Measurements in the Arctic Summer Bureau, Jérôme Camy-Peyret, Claude Payan, Sébastien TROPO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Institut Pierre-Simon-Laplace (IPSL) École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS) noordwijk, Netherlands 2014-05-05 https://hal.science/hal-00993355 en eng HAL CCSD hal-00993355 https://hal.science/hal-00993355 10th International Workshop on Greenhouse Gas Measurements from Space (IWGGMS) https://hal.science/hal-00993355 10th International Workshop on Greenhouse Gas Measurements from Space (IWGGMS), May 2014, noordwijk, Netherlands CO2 CH4 GHG TIR GOSAT IASI [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] info:eu-repo/semantics/conferenceObject Conference papers 2014 ftunivnantes 2023-02-14T23:50:11Z The comparison of different thermal infrared (TIR) nadir sounders is quite important for assessing their capabilities to retrieve reliable information on the concentration of greenhouse gases. However, the present satellite instruments able to provide such information are not many. While IASI (on MetOp) and AIRS (on Aqua) have been compared in the Simultaneous Nadir Observation (or SNO) configuration, this has not been attempted for IASI and TANSO‐FTS (on GOSAT). We have selected two periods from mid‐July to mid‐September in the high latitude polar region during polar summer when it is possible to observe almost coincident or superimposed footprints (IFOV) of the two infrared sounders considered in this study. These coincidences could be called Simultaneous Off‐Nadir Observations (or SONO). This has been performed for two years i.e. 2010 and 2013. This latter year has been selected because IASI CH4 level 2 (L2) products for this period are now available and also because both IASI‐A and IASI‐B were operational in 2013. The summer period was chosen because of ice free waters (in the latitude band 70N to 80N) over which retrieval are less sensitive to surface inhomogeneities over land. The inversion configuration will be described and the XCH4 and XCO2 (column average mixing ratio) will be compared in addition to the sea surface temperature Tsurf used as a control variable. The retrieved values will be compared to the L2 products available from Eumetsat for CH4 and NIES for CH4 and CO2. The retrieved sea surface temperature will also provide an additional check of the performances of the retrievals. The possibility to retrieve information on other greenhouse species (N2O, CFCs) will be discussed. These results are interesting starting points for preparing the future mission IASI‐NG on MetOP‐SG as well as GOSAT‐2. Conference Object Arctic Université de Nantes: HAL-UNIV-NANTES Arctic |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
CO2 CH4 GHG TIR GOSAT IASI [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
spellingShingle |
CO2 CH4 GHG TIR GOSAT IASI [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] Bureau, Jérôme Camy-Peyret, Claude Payan, Sébastien Comparison of Retrievals of CH4 and CO2 from IASI and GOSAT in the TIR for Nearly Coincident Measurements in the Arctic Summer |
topic_facet |
CO2 CH4 GHG TIR GOSAT IASI [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
description |
The comparison of different thermal infrared (TIR) nadir sounders is quite important for assessing their capabilities to retrieve reliable information on the concentration of greenhouse gases. However, the present satellite instruments able to provide such information are not many. While IASI (on MetOp) and AIRS (on Aqua) have been compared in the Simultaneous Nadir Observation (or SNO) configuration, this has not been attempted for IASI and TANSO‐FTS (on GOSAT). We have selected two periods from mid‐July to mid‐September in the high latitude polar region during polar summer when it is possible to observe almost coincident or superimposed footprints (IFOV) of the two infrared sounders considered in this study. These coincidences could be called Simultaneous Off‐Nadir Observations (or SONO). This has been performed for two years i.e. 2010 and 2013. This latter year has been selected because IASI CH4 level 2 (L2) products for this period are now available and also because both IASI‐A and IASI‐B were operational in 2013. The summer period was chosen because of ice free waters (in the latitude band 70N to 80N) over which retrieval are less sensitive to surface inhomogeneities over land. The inversion configuration will be described and the XCH4 and XCO2 (column average mixing ratio) will be compared in addition to the sea surface temperature Tsurf used as a control variable. The retrieved values will be compared to the L2 products available from Eumetsat for CH4 and NIES for CH4 and CO2. The retrieved sea surface temperature will also provide an additional check of the performances of the retrievals. The possibility to retrieve information on other greenhouse species (N2O, CFCs) will be discussed. These results are interesting starting points for preparing the future mission IASI‐NG on MetOP‐SG as well as GOSAT‐2. |
author2 |
TROPO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Institut Pierre-Simon-Laplace (IPSL) École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS) |
format |
Conference Object |
author |
Bureau, Jérôme Camy-Peyret, Claude Payan, Sébastien |
author_facet |
Bureau, Jérôme Camy-Peyret, Claude Payan, Sébastien |
author_sort |
Bureau, Jérôme |
title |
Comparison of Retrievals of CH4 and CO2 from IASI and GOSAT in the TIR for Nearly Coincident Measurements in the Arctic Summer |
title_short |
Comparison of Retrievals of CH4 and CO2 from IASI and GOSAT in the TIR for Nearly Coincident Measurements in the Arctic Summer |
title_full |
Comparison of Retrievals of CH4 and CO2 from IASI and GOSAT in the TIR for Nearly Coincident Measurements in the Arctic Summer |
title_fullStr |
Comparison of Retrievals of CH4 and CO2 from IASI and GOSAT in the TIR for Nearly Coincident Measurements in the Arctic Summer |
title_full_unstemmed |
Comparison of Retrievals of CH4 and CO2 from IASI and GOSAT in the TIR for Nearly Coincident Measurements in the Arctic Summer |
title_sort |
comparison of retrievals of ch4 and co2 from iasi and gosat in the tir for nearly coincident measurements in the arctic summer |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.science/hal-00993355 |
op_coverage |
noordwijk, Netherlands |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
10th International Workshop on Greenhouse Gas Measurements from Space (IWGGMS) https://hal.science/hal-00993355 10th International Workshop on Greenhouse Gas Measurements from Space (IWGGMS), May 2014, noordwijk, Netherlands |
op_relation |
hal-00993355 https://hal.science/hal-00993355 |
_version_ |
1766345438447796224 |