Technical note: A sensitivity analysis from 1 to 40 GHz for observing the Arctic Ocean with the Copernicus Imaging Microwave Radiometer
The Copernicus Imaging Microwave Radiometer (CIMR) is one of the high-priority missions for the expansion of the Copernicus program within the European Space Agency (ESA). It is designed to respond to the European Union Arctic policy. Its channels, incidence angle, precision, and spatial resolutions...
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ftcopernicus:oai:publications.copernicus.org:os89687 2023-05-15T14:48:16+02:00 Technical note: A sensitivity analysis from 1 to 40 GHz for observing the Arctic Ocean with the Copernicus Imaging Microwave Radiometer Kilic, Lise Prigent, Catherine Jimenez, Carlos Donlon, Craig 2021-03-12 application/pdf https://doi.org/10.5194/os-17-455-2021 https://os.copernicus.org/articles/17/455/2021/ eng eng doi:10.5194/os-17-455-2021 https://os.copernicus.org/articles/17/455/2021/ eISSN: 1812-0792 Text 2021 ftcopernicus https://doi.org/10.5194/os-17-455-2021 2021-03-15T17:22:14Z The Copernicus Imaging Microwave Radiometer (CIMR) is one of the high-priority missions for the expansion of the Copernicus program within the European Space Agency (ESA). It is designed to respond to the European Union Arctic policy. Its channels, incidence angle, precision, and spatial resolutions have been selected to observe the Arctic Ocean with the recommendations expressed by the user communities. In this note, we present the sensitivity analysis that has led to the choice of the CIMR channels. The famous figure from Wilheit ( 1979 ) , describing the frequency sensitivity of passive microwave satellite observations to ocean parameters, has been extensively used for channel selection of microwave radiometer frequencies on board oceanic satellite missions. Here, we propose to update this sensitivity analysis, using state-of-the-art radiative transfer simulations for different geophysical conditions (Arctic, mid-latitude, tropics). We used the Radiative Transfer Model (RTM) from Meissner and Wentz ( 2012 ) for the ocean surface, the Round Robin Data Package of the ESA Climate Change Initiative ( Pedersen et al. , 2019 ) for the sea ice, and the RTM from Rosenkranz ( 2017 ) for the atmosphere. The sensitivities of the brightness temperatures (TBs) observed by CIMR as a function of sea surface temperature (SST), sea surface salinity (SSS), sea ice concentration (SIC), ocean wind speed (OWS), total column water vapor (TCWV), and total column liquid water (TCLW) are presented as a function of frequency between 1 and 40 GHz. The analysis underlines the difficulty to reach the user requirements with single-channel retrieval, especially under cold ocean conditions. With simultaneous measurements between 1.4 and 36 GHz onboard CIMR, applying multi-channel algorithms will be facilitated, to provide the user community with the required ocean and ice information under arctic environments. Text Arctic Arctic Ocean Climate change Sea ice Copernicus Publications: E-Journals Arctic Arctic Ocean Pedersen ENVELOPE(140.013,140.013,-66.668,-66.668) Ocean Science 17 2 455 461 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
The Copernicus Imaging Microwave Radiometer (CIMR) is one of the high-priority missions for the expansion of the Copernicus program within the European Space Agency (ESA). It is designed to respond to the European Union Arctic policy. Its channels, incidence angle, precision, and spatial resolutions have been selected to observe the Arctic Ocean with the recommendations expressed by the user communities. In this note, we present the sensitivity analysis that has led to the choice of the CIMR channels. The famous figure from Wilheit ( 1979 ) , describing the frequency sensitivity of passive microwave satellite observations to ocean parameters, has been extensively used for channel selection of microwave radiometer frequencies on board oceanic satellite missions. Here, we propose to update this sensitivity analysis, using state-of-the-art radiative transfer simulations for different geophysical conditions (Arctic, mid-latitude, tropics). We used the Radiative Transfer Model (RTM) from Meissner and Wentz ( 2012 ) for the ocean surface, the Round Robin Data Package of the ESA Climate Change Initiative ( Pedersen et al. , 2019 ) for the sea ice, and the RTM from Rosenkranz ( 2017 ) for the atmosphere. The sensitivities of the brightness temperatures (TBs) observed by CIMR as a function of sea surface temperature (SST), sea surface salinity (SSS), sea ice concentration (SIC), ocean wind speed (OWS), total column water vapor (TCWV), and total column liquid water (TCLW) are presented as a function of frequency between 1 and 40 GHz. The analysis underlines the difficulty to reach the user requirements with single-channel retrieval, especially under cold ocean conditions. With simultaneous measurements between 1.4 and 36 GHz onboard CIMR, applying multi-channel algorithms will be facilitated, to provide the user community with the required ocean and ice information under arctic environments. |
format |
Text |
author |
Kilic, Lise Prigent, Catherine Jimenez, Carlos Donlon, Craig |
spellingShingle |
Kilic, Lise Prigent, Catherine Jimenez, Carlos Donlon, Craig Technical note: A sensitivity analysis from 1 to 40 GHz for observing the Arctic Ocean with the Copernicus Imaging Microwave Radiometer |
author_facet |
Kilic, Lise Prigent, Catherine Jimenez, Carlos Donlon, Craig |
author_sort |
Kilic, Lise |
title |
Technical note: A sensitivity analysis from 1 to 40 GHz for observing the Arctic Ocean with the Copernicus Imaging Microwave Radiometer |
title_short |
Technical note: A sensitivity analysis from 1 to 40 GHz for observing the Arctic Ocean with the Copernicus Imaging Microwave Radiometer |
title_full |
Technical note: A sensitivity analysis from 1 to 40 GHz for observing the Arctic Ocean with the Copernicus Imaging Microwave Radiometer |
title_fullStr |
Technical note: A sensitivity analysis from 1 to 40 GHz for observing the Arctic Ocean with the Copernicus Imaging Microwave Radiometer |
title_full_unstemmed |
Technical note: A sensitivity analysis from 1 to 40 GHz for observing the Arctic Ocean with the Copernicus Imaging Microwave Radiometer |
title_sort |
technical note: a sensitivity analysis from 1 to 40 ghz for observing the arctic ocean with the copernicus imaging microwave radiometer |
publishDate |
2021 |
url |
https://doi.org/10.5194/os-17-455-2021 https://os.copernicus.org/articles/17/455/2021/ |
long_lat |
ENVELOPE(140.013,140.013,-66.668,-66.668) |
geographic |
Arctic Arctic Ocean Pedersen |
geographic_facet |
Arctic Arctic Ocean Pedersen |
genre |
Arctic Arctic Ocean Climate change Sea ice |
genre_facet |
Arctic Arctic Ocean Climate change Sea ice |
op_source |
eISSN: 1812-0792 |
op_relation |
doi:10.5194/os-17-455-2021 https://os.copernicus.org/articles/17/455/2021/ |
op_doi |
https://doi.org/10.5194/os-17-455-2021 |
container_title |
Ocean Science |
container_volume |
17 |
container_issue |
2 |
container_start_page |
455 |
op_container_end_page |
461 |
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