Brief communication: Conventional assumptions involving the speed of radar waves in snow introduce systematic underestimates to sea ice thickness and seasonal growth rate estimates
Pan-Arctic sea ice thickness has been monitored over recent decades by satellite radar altimeters such as CryoSat-2, which emits Ku-band radar waves that are assumed in publicly available sea ice thickness products to penetrate overlying snow and scatter from the ice–snow interface. Here we examine...
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Online Access: | https://doi.org/10.5194/tc-14-251-2020 https://tc.copernicus.org/articles/14/251/2020/ |
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ftcopernicus:oai:publications.copernicus.org:tc79657 2023-05-15T15:02:36+02:00 Brief communication: Conventional assumptions involving the speed of radar waves in snow introduce systematic underestimates to sea ice thickness and seasonal growth rate estimates Mallett, Robbie D. C. Lawrence, Isobel R. Stroeve, Julienne C. Landy, Jack C. Tsamados, Michel 2020-01-27 application/pdf https://doi.org/10.5194/tc-14-251-2020 https://tc.copernicus.org/articles/14/251/2020/ eng eng doi:10.5194/tc-14-251-2020 https://tc.copernicus.org/articles/14/251/2020/ eISSN: 1994-0424 Text 2020 ftcopernicus https://doi.org/10.5194/tc-14-251-2020 2020-07-20T16:22:28Z Pan-Arctic sea ice thickness has been monitored over recent decades by satellite radar altimeters such as CryoSat-2, which emits Ku-band radar waves that are assumed in publicly available sea ice thickness products to penetrate overlying snow and scatter from the ice–snow interface. Here we examine two expressions for the time delay caused by slower radar wave propagation through the snow layer and related assumptions concerning the time evolution of overlying snow density. Two conventional treatments introduce systematic underestimates of up to 15 cm into ice thickness estimates and up to 10 cm into thermodynamic growth rate estimates over multi-year ice in winter. Correcting these biases would impact a wide variety of model projections, calibrations, validations and reanalyses. Text Arctic Sea ice Copernicus Publications: E-Journals Arctic The Cryosphere 14 1 251 260 |
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Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Pan-Arctic sea ice thickness has been monitored over recent decades by satellite radar altimeters such as CryoSat-2, which emits Ku-band radar waves that are assumed in publicly available sea ice thickness products to penetrate overlying snow and scatter from the ice–snow interface. Here we examine two expressions for the time delay caused by slower radar wave propagation through the snow layer and related assumptions concerning the time evolution of overlying snow density. Two conventional treatments introduce systematic underestimates of up to 15 cm into ice thickness estimates and up to 10 cm into thermodynamic growth rate estimates over multi-year ice in winter. Correcting these biases would impact a wide variety of model projections, calibrations, validations and reanalyses. |
format |
Text |
author |
Mallett, Robbie D. C. Lawrence, Isobel R. Stroeve, Julienne C. Landy, Jack C. Tsamados, Michel |
spellingShingle |
Mallett, Robbie D. C. Lawrence, Isobel R. Stroeve, Julienne C. Landy, Jack C. Tsamados, Michel Brief communication: Conventional assumptions involving the speed of radar waves in snow introduce systematic underestimates to sea ice thickness and seasonal growth rate estimates |
author_facet |
Mallett, Robbie D. C. Lawrence, Isobel R. Stroeve, Julienne C. Landy, Jack C. Tsamados, Michel |
author_sort |
Mallett, Robbie D. C. |
title |
Brief communication: Conventional assumptions involving the speed of radar waves in snow introduce systematic underestimates to sea ice thickness and seasonal growth rate estimates |
title_short |
Brief communication: Conventional assumptions involving the speed of radar waves in snow introduce systematic underestimates to sea ice thickness and seasonal growth rate estimates |
title_full |
Brief communication: Conventional assumptions involving the speed of radar waves in snow introduce systematic underestimates to sea ice thickness and seasonal growth rate estimates |
title_fullStr |
Brief communication: Conventional assumptions involving the speed of radar waves in snow introduce systematic underestimates to sea ice thickness and seasonal growth rate estimates |
title_full_unstemmed |
Brief communication: Conventional assumptions involving the speed of radar waves in snow introduce systematic underestimates to sea ice thickness and seasonal growth rate estimates |
title_sort |
brief communication: conventional assumptions involving the speed of radar waves in snow introduce systematic underestimates to sea ice thickness and seasonal growth rate estimates |
publishDate |
2020 |
url |
https://doi.org/10.5194/tc-14-251-2020 https://tc.copernicus.org/articles/14/251/2020/ |
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-14-251-2020 https://tc.copernicus.org/articles/14/251/2020/ |
op_doi |
https://doi.org/10.5194/tc-14-251-2020 |
container_title |
The Cryosphere |
container_volume |
14 |
container_issue |
1 |
container_start_page |
251 |
op_container_end_page |
260 |
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1766334540824969216 |