On the use of Infrared Atmospheric Sounding Interferometer (IASI) spectrally resolved radiances to test the EC-Earth climate model (v3.3.3) in clear-sky conditions
The long-term comparison between simulated and observed spectrally resolved outgoing longwave radiation (OLR) can represent a stringent test for the direct verification and improvement of general circulation models (GCMs), which are regularly tuned by adjusting parameters related to subgrid processe...
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Copernicus Publications
2023
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Online Access: | https://doi.org/10.5194/gmd-16-1379-2023 https://doaj.org/article/7e7f5d0cca4048b0b66963f6e8e94796 |
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ftdoajarticles:oai:doaj.org/article:7e7f5d0cca4048b0b66963f6e8e94796 2023-05-15T18:18:50+02:00 On the use of Infrared Atmospheric Sounding Interferometer (IASI) spectrally resolved radiances to test the EC-Earth climate model (v3.3.3) in clear-sky conditions S. Della Fera F. Fabiano P. Raspollini M. Ridolfi U. Cortesi F. Barbara J. von Hardenberg 2023-02-01T00:00:00Z https://doi.org/10.5194/gmd-16-1379-2023 https://doaj.org/article/7e7f5d0cca4048b0b66963f6e8e94796 EN eng Copernicus Publications https://gmd.copernicus.org/articles/16/1379/2023/gmd-16-1379-2023.pdf https://doaj.org/toc/1991-959X https://doaj.org/toc/1991-9603 doi:10.5194/gmd-16-1379-2023 1991-959X 1991-9603 https://doaj.org/article/7e7f5d0cca4048b0b66963f6e8e94796 Geoscientific Model Development, Vol 16, Pp 1379-1394 (2023) Geology QE1-996.5 article 2023 ftdoajarticles https://doi.org/10.5194/gmd-16-1379-2023 2023-03-05T01:34:07Z The long-term comparison between simulated and observed spectrally resolved outgoing longwave radiation (OLR) can represent a stringent test for the direct verification and improvement of general circulation models (GCMs), which are regularly tuned by adjusting parameters related to subgrid processes not explicitly represented in the model to constrain the integrated OLR energy fluxes to observed values. However, a good agreement between simulated and observed integrated OLR fluxes may be obtained from the cancellation of opposite-in-sign systematic errors localized in specific spectral ranges. Since the mid-2000s, stable hyperspectral observations of the mid-infrared region (667 to 2750 cm −1 ) of the Earth emission spectrum have been provided by different sensors (e.g. AIRS, IASI and CrIS). Furthermore, the FORUM (Far-infrared Outgoing Radiation Understanding and Monitoring) mission, selected to be the ninth ESA Earth Explorer, will measure, starting from 2027, the terrestrial radiation emitted to space at the top of the atmosphere (TOA) from 100 to 1600 cm −1 , filling the observational gap in the far-infrared (FIR) region, from 100 to 667 cm −1 . In this work, in anticipation of FORUM measurements, we compare Infrared Atmospheric Sounding Interferometer (IASI) Metop-A observations to radiances simulated on the basis of the atmospheric fields predicted by the EC-Earth Global Climate Model (version 3.3.3) in clear-sky conditions. To simulate spectra based on the atmospheric and surface state provided by the climate model, the radiative transfer model σ-IASI has been integrated in the Cloud Feedback Model Intercomparison Project (COSP) package. Therefore, online simulations, provided by the EC-Earth model equipped with the new COSP–σ-IASI module, have been performed in clear-sky conditions with prescribed sea surface temperature and sea ice concentration, every 6 h, over a time frame consistent with the availability of IASI data. Systematic comparisons between observed and simulated brightness temperature (BT) ... Article in Journal/Newspaper Sea ice Cris Directory of Open Access Journals: DOAJ Articles Geoscientific Model Development 16 4 1379 1394 |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 |
spellingShingle |
Geology QE1-996.5 S. Della Fera F. Fabiano P. Raspollini M. Ridolfi U. Cortesi F. Barbara J. von Hardenberg On the use of Infrared Atmospheric Sounding Interferometer (IASI) spectrally resolved radiances to test the EC-Earth climate model (v3.3.3) in clear-sky conditions |
topic_facet |
Geology QE1-996.5 |
description |
The long-term comparison between simulated and observed spectrally resolved outgoing longwave radiation (OLR) can represent a stringent test for the direct verification and improvement of general circulation models (GCMs), which are regularly tuned by adjusting parameters related to subgrid processes not explicitly represented in the model to constrain the integrated OLR energy fluxes to observed values. However, a good agreement between simulated and observed integrated OLR fluxes may be obtained from the cancellation of opposite-in-sign systematic errors localized in specific spectral ranges. Since the mid-2000s, stable hyperspectral observations of the mid-infrared region (667 to 2750 cm −1 ) of the Earth emission spectrum have been provided by different sensors (e.g. AIRS, IASI and CrIS). Furthermore, the FORUM (Far-infrared Outgoing Radiation Understanding and Monitoring) mission, selected to be the ninth ESA Earth Explorer, will measure, starting from 2027, the terrestrial radiation emitted to space at the top of the atmosphere (TOA) from 100 to 1600 cm −1 , filling the observational gap in the far-infrared (FIR) region, from 100 to 667 cm −1 . In this work, in anticipation of FORUM measurements, we compare Infrared Atmospheric Sounding Interferometer (IASI) Metop-A observations to radiances simulated on the basis of the atmospheric fields predicted by the EC-Earth Global Climate Model (version 3.3.3) in clear-sky conditions. To simulate spectra based on the atmospheric and surface state provided by the climate model, the radiative transfer model σ-IASI has been integrated in the Cloud Feedback Model Intercomparison Project (COSP) package. Therefore, online simulations, provided by the EC-Earth model equipped with the new COSP–σ-IASI module, have been performed in clear-sky conditions with prescribed sea surface temperature and sea ice concentration, every 6 h, over a time frame consistent with the availability of IASI data. Systematic comparisons between observed and simulated brightness temperature (BT) ... |
format |
Article in Journal/Newspaper |
author |
S. Della Fera F. Fabiano P. Raspollini M. Ridolfi U. Cortesi F. Barbara J. von Hardenberg |
author_facet |
S. Della Fera F. Fabiano P. Raspollini M. Ridolfi U. Cortesi F. Barbara J. von Hardenberg |
author_sort |
S. Della Fera |
title |
On the use of Infrared Atmospheric Sounding Interferometer (IASI) spectrally resolved radiances to test the EC-Earth climate model (v3.3.3) in clear-sky conditions |
title_short |
On the use of Infrared Atmospheric Sounding Interferometer (IASI) spectrally resolved radiances to test the EC-Earth climate model (v3.3.3) in clear-sky conditions |
title_full |
On the use of Infrared Atmospheric Sounding Interferometer (IASI) spectrally resolved radiances to test the EC-Earth climate model (v3.3.3) in clear-sky conditions |
title_fullStr |
On the use of Infrared Atmospheric Sounding Interferometer (IASI) spectrally resolved radiances to test the EC-Earth climate model (v3.3.3) in clear-sky conditions |
title_full_unstemmed |
On the use of Infrared Atmospheric Sounding Interferometer (IASI) spectrally resolved radiances to test the EC-Earth climate model (v3.3.3) in clear-sky conditions |
title_sort |
on the use of infrared atmospheric sounding interferometer (iasi) spectrally resolved radiances to test the ec-earth climate model (v3.3.3) in clear-sky conditions |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/gmd-16-1379-2023 https://doaj.org/article/7e7f5d0cca4048b0b66963f6e8e94796 |
genre |
Sea ice Cris |
genre_facet |
Sea ice Cris |
op_source |
Geoscientific Model Development, Vol 16, Pp 1379-1394 (2023) |
op_relation |
https://gmd.copernicus.org/articles/16/1379/2023/gmd-16-1379-2023.pdf https://doaj.org/toc/1991-959X https://doaj.org/toc/1991-9603 doi:10.5194/gmd-16-1379-2023 1991-959X 1991-9603 https://doaj.org/article/7e7f5d0cca4048b0b66963f6e8e94796 |
op_doi |
https://doi.org/10.5194/gmd-16-1379-2023 |
container_title |
Geoscientific Model Development |
container_volume |
16 |
container_issue |
4 |
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1379 |
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1394 |
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