Estimating the snow depth, the snow–ice interface temperature, and the effective temperature of Arctic sea ice using Advanced Microwave Scanning Radiometer 2 and ice mass balance buoy data
Mapping sea ice concentration (SIC) and understanding sea ice properties and variability is important, especially today with the recent Arctic sea ice decline. Moreover, accurate estimation of the sea ice effective temperature ( T eff ) at 50 GHz is needed for atmospheric sounding applications over...
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Online Access: | https://doi.org/10.5194/tc-13-1283-2019 https://tc.copernicus.org/articles/13/1283/2019/ |
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ftcopernicus:oai:publications.copernicus.org:tc72287 2023-05-15T14:53:07+02:00 Estimating the snow depth, the snow–ice interface temperature, and the effective temperature of Arctic sea ice using Advanced Microwave Scanning Radiometer 2 and ice mass balance buoy data Kilic, Lise Tonboe, Rasmus Tage Prigent, Catherine Heygster, Georg 2019-04-18 application/pdf https://doi.org/10.5194/tc-13-1283-2019 https://tc.copernicus.org/articles/13/1283/2019/ eng eng doi:10.5194/tc-13-1283-2019 https://tc.copernicus.org/articles/13/1283/2019/ eISSN: 1994-0424 Text 2019 ftcopernicus https://doi.org/10.5194/tc-13-1283-2019 2020-07-20T16:22:51Z Mapping sea ice concentration (SIC) and understanding sea ice properties and variability is important, especially today with the recent Arctic sea ice decline. Moreover, accurate estimation of the sea ice effective temperature ( T eff ) at 50 GHz is needed for atmospheric sounding applications over sea ice and for noise reduction in SIC estimates. At low microwave frequencies, the sensitivity to the atmosphere is low, and it is possible to derive sea ice parameters due to the penetration of microwaves in the snow and ice layers. In this study, we propose simple algorithms to derive the snow depth, the snow–ice interface temperature ( T Snow−Ice ) and the T eff of Arctic sea ice from microwave brightness temperatures (TBs). This is achieved using the Round Robin Data Package of the ESA sea ice CCI project, which contains TBs from the Advanced Microwave Scanning Radiometer 2 (AMSR2) collocated with measurements from ice mass balance buoys (IMBs) and the NASA Operation Ice Bridge (OIB) airborne campaigns over the Arctic sea ice. The snow depth over sea ice is estimated with an error of 5.1 cm, using a multilinear regression with the TBs at 6, 18, and 36 V. The T Snow−Ice is retrieved using a linear regression as a function of the snow depth and the TBs at 10 or 6 V. The root mean square errors (RMSEs) obtained are 2.87 and 2.90 K respectively, with 10 and 6 V TBs. The T eff at microwave frequencies between 6 and 89 GHz is expressed as a function of T Snow−Ice using data from a thermodynamical model combined with the Microwave Emission Model of Layered Snowpacks. T eff is estimated from the T Snow−Ice with a RMSE of less than 1 K. Text Arctic Sea ice Copernicus Publications: E-Journals Arctic The Cryosphere 13 4 1283 1296 |
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Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Mapping sea ice concentration (SIC) and understanding sea ice properties and variability is important, especially today with the recent Arctic sea ice decline. Moreover, accurate estimation of the sea ice effective temperature ( T eff ) at 50 GHz is needed for atmospheric sounding applications over sea ice and for noise reduction in SIC estimates. At low microwave frequencies, the sensitivity to the atmosphere is low, and it is possible to derive sea ice parameters due to the penetration of microwaves in the snow and ice layers. In this study, we propose simple algorithms to derive the snow depth, the snow–ice interface temperature ( T Snow−Ice ) and the T eff of Arctic sea ice from microwave brightness temperatures (TBs). This is achieved using the Round Robin Data Package of the ESA sea ice CCI project, which contains TBs from the Advanced Microwave Scanning Radiometer 2 (AMSR2) collocated with measurements from ice mass balance buoys (IMBs) and the NASA Operation Ice Bridge (OIB) airborne campaigns over the Arctic sea ice. The snow depth over sea ice is estimated with an error of 5.1 cm, using a multilinear regression with the TBs at 6, 18, and 36 V. The T Snow−Ice is retrieved using a linear regression as a function of the snow depth and the TBs at 10 or 6 V. The root mean square errors (RMSEs) obtained are 2.87 and 2.90 K respectively, with 10 and 6 V TBs. The T eff at microwave frequencies between 6 and 89 GHz is expressed as a function of T Snow−Ice using data from a thermodynamical model combined with the Microwave Emission Model of Layered Snowpacks. T eff is estimated from the T Snow−Ice with a RMSE of less than 1 K. |
format |
Text |
author |
Kilic, Lise Tonboe, Rasmus Tage Prigent, Catherine Heygster, Georg |
spellingShingle |
Kilic, Lise Tonboe, Rasmus Tage Prigent, Catherine Heygster, Georg Estimating the snow depth, the snow–ice interface temperature, and the effective temperature of Arctic sea ice using Advanced Microwave Scanning Radiometer 2 and ice mass balance buoy data |
author_facet |
Kilic, Lise Tonboe, Rasmus Tage Prigent, Catherine Heygster, Georg |
author_sort |
Kilic, Lise |
title |
Estimating the snow depth, the snow–ice interface temperature, and the effective temperature of Arctic sea ice using Advanced Microwave Scanning Radiometer 2 and ice mass balance buoy data |
title_short |
Estimating the snow depth, the snow–ice interface temperature, and the effective temperature of Arctic sea ice using Advanced Microwave Scanning Radiometer 2 and ice mass balance buoy data |
title_full |
Estimating the snow depth, the snow–ice interface temperature, and the effective temperature of Arctic sea ice using Advanced Microwave Scanning Radiometer 2 and ice mass balance buoy data |
title_fullStr |
Estimating the snow depth, the snow–ice interface temperature, and the effective temperature of Arctic sea ice using Advanced Microwave Scanning Radiometer 2 and ice mass balance buoy data |
title_full_unstemmed |
Estimating the snow depth, the snow–ice interface temperature, and the effective temperature of Arctic sea ice using Advanced Microwave Scanning Radiometer 2 and ice mass balance buoy data |
title_sort |
estimating the snow depth, the snow–ice interface temperature, and the effective temperature of arctic sea ice using advanced microwave scanning radiometer 2 and ice mass balance buoy data |
publishDate |
2019 |
url |
https://doi.org/10.5194/tc-13-1283-2019 https://tc.copernicus.org/articles/13/1283/2019/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tc-13-1283-2019 https://tc.copernicus.org/articles/13/1283/2019/ |
op_doi |
https://doi.org/10.5194/tc-13-1283-2019 |
container_title |
The Cryosphere |
container_volume |
13 |
container_issue |
4 |
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1283 |
op_container_end_page |
1296 |
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1766324530594185216 |