Retrieval of total water vapour in the Arctic using microwave humidity sounders
Quantitative retrievals of atmospheric water vapour in the Arctic present numerous challenges because of the particular climate characteristics of this area. Here, we attempt to build upon the work of Melsheimer and Heygster (2008) to retrieve total atmospheric water vapour (TWV) in the Arctic from...
Published in: | Atmospheric Measurement Techniques |
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Copernicus Publications
2018
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00006838 2023-05-15T14:48:08+02:00 Retrieval of total water vapour in the Arctic using microwave humidity sounders Scarlat, Raul Cristian Melsheimer, Christian Heygster, Georg 2018-04 electronic https://doi.org/10.5194/amt-11-2067-2018 https://noa.gwlb.de/receive/cop_mods_00006838 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00006795/amt-11-2067-2018.pdf https://amt.copernicus.org/articles/11/2067/2018/amt-11-2067-2018.pdf eng eng Copernicus Publications Atmospheric Measurement Techniques -- http://www.bibliothek.uni-regensburg.de/ezeit/?2505596 -- http://www.atmospheric-measurement-techniques.net/ -- 1867-8548 https://doi.org/10.5194/amt-11-2067-2018 https://noa.gwlb.de/receive/cop_mods_00006838 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00006795/amt-11-2067-2018.pdf https://amt.copernicus.org/articles/11/2067/2018/amt-11-2067-2018.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2018 ftnonlinearchiv https://doi.org/10.5194/amt-11-2067-2018 2022-02-08T22:58:50Z Quantitative retrievals of atmospheric water vapour in the Arctic present numerous challenges because of the particular climate characteristics of this area. Here, we attempt to build upon the work of Melsheimer and Heygster (2008) to retrieve total atmospheric water vapour (TWV) in the Arctic from satellite microwave radiometers. While the above-mentioned algorithm deals primarily with the ice-covered central Arctic, with this work we aim to extend the coverage to partially ice-covered and ice-free areas. By using modelled values for the microwave emissivity of the ice-free sea surface, we develop two sub-algorithms using different sets of channels that deal solely with open-ocean areas. The new algorithm extends the spatial coverage of the retrieval throughout the year but especially in the warmer months when higher TWV values are frequent. The high TWV measurements over both sea-ice and open-water surfaces are, however, connected to larger uncertainties as the retrieval values are close to the instrument saturation limits. This approach allows us to apply the algorithm to regions where previously no data were available and ensures a more consistent physical analysis of the satellite measurements by taking into account the contribution of the surface emissivity to the measured signal. Article in Journal/Newspaper Arctic Sea ice Niedersächsisches Online-Archiv NOA Arctic Atmospheric Measurement Techniques 11 4 2067 2084 |
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Niedersächsisches Online-Archiv NOA |
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English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Scarlat, Raul Cristian Melsheimer, Christian Heygster, Georg Retrieval of total water vapour in the Arctic using microwave humidity sounders |
topic_facet |
article Verlagsveröffentlichung |
description |
Quantitative retrievals of atmospheric water vapour in the Arctic present numerous challenges because of the particular climate characteristics of this area. Here, we attempt to build upon the work of Melsheimer and Heygster (2008) to retrieve total atmospheric water vapour (TWV) in the Arctic from satellite microwave radiometers. While the above-mentioned algorithm deals primarily with the ice-covered central Arctic, with this work we aim to extend the coverage to partially ice-covered and ice-free areas. By using modelled values for the microwave emissivity of the ice-free sea surface, we develop two sub-algorithms using different sets of channels that deal solely with open-ocean areas. The new algorithm extends the spatial coverage of the retrieval throughout the year but especially in the warmer months when higher TWV values are frequent. The high TWV measurements over both sea-ice and open-water surfaces are, however, connected to larger uncertainties as the retrieval values are close to the instrument saturation limits. This approach allows us to apply the algorithm to regions where previously no data were available and ensures a more consistent physical analysis of the satellite measurements by taking into account the contribution of the surface emissivity to the measured signal. |
format |
Article in Journal/Newspaper |
author |
Scarlat, Raul Cristian Melsheimer, Christian Heygster, Georg |
author_facet |
Scarlat, Raul Cristian Melsheimer, Christian Heygster, Georg |
author_sort |
Scarlat, Raul Cristian |
title |
Retrieval of total water vapour in the Arctic using microwave humidity sounders |
title_short |
Retrieval of total water vapour in the Arctic using microwave humidity sounders |
title_full |
Retrieval of total water vapour in the Arctic using microwave humidity sounders |
title_fullStr |
Retrieval of total water vapour in the Arctic using microwave humidity sounders |
title_full_unstemmed |
Retrieval of total water vapour in the Arctic using microwave humidity sounders |
title_sort |
retrieval of total water vapour in the arctic using microwave humidity sounders |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/amt-11-2067-2018 https://noa.gwlb.de/receive/cop_mods_00006838 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00006795/amt-11-2067-2018.pdf https://amt.copernicus.org/articles/11/2067/2018/amt-11-2067-2018.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_relation |
Atmospheric Measurement Techniques -- http://www.bibliothek.uni-regensburg.de/ezeit/?2505596 -- http://www.atmospheric-measurement-techniques.net/ -- 1867-8548 https://doi.org/10.5194/amt-11-2067-2018 https://noa.gwlb.de/receive/cop_mods_00006838 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00006795/amt-11-2067-2018.pdf https://amt.copernicus.org/articles/11/2067/2018/amt-11-2067-2018.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/amt-11-2067-2018 |
container_title |
Atmospheric Measurement Techniques |
container_volume |
11 |
container_issue |
4 |
container_start_page |
2067 |
op_container_end_page |
2084 |
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1766319220127170560 |