Opportunistic evaluation of modelled sea ice drift using passively drifting telemetry collars in Hudson Bay, Canada
Sea ice drift plays a central role in the Arctic climate and ecology through its effects on the ice cover, thermodynamics, and energetics of northern marine ecosystems. Due to the challenges of accessing the Arctic, remote sensing has been used to obtain large-scale longitudinal data. These data are...
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2020
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Online Access: | https://doi.org/10.5194/tc-14-1937-2020 https://www.the-cryosphere.net/14/1937/2020/tc-14-1937-2020.pdf https://doaj.org/article/fc4e539feae74ec6b8670e3a0104329f |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:fc4e539feae74ec6b8670e3a0104329f 2023-05-15T14:57:47+02:00 Opportunistic evaluation of modelled sea ice drift using passively drifting telemetry collars in Hudson Bay, Canada R. R. Togunov N. J. Klappstein N. J. Lunn A. E. Derocher M. Auger-Méthé 2020-06-01 https://doi.org/10.5194/tc-14-1937-2020 https://www.the-cryosphere.net/14/1937/2020/tc-14-1937-2020.pdf https://doaj.org/article/fc4e539feae74ec6b8670e3a0104329f en eng Copernicus Publications doi:10.5194/tc-14-1937-2020 1994-0416 1994-0424 https://www.the-cryosphere.net/14/1937/2020/tc-14-1937-2020.pdf https://doaj.org/article/fc4e539feae74ec6b8670e3a0104329f undefined The Cryosphere, Vol 14, Pp 1937-1950 (2020) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2020 fttriple https://doi.org/10.5194/tc-14-1937-2020 2023-01-22T18:23:27Z Sea ice drift plays a central role in the Arctic climate and ecology through its effects on the ice cover, thermodynamics, and energetics of northern marine ecosystems. Due to the challenges of accessing the Arctic, remote sensing has been used to obtain large-scale longitudinal data. These data are often associated with errors and biases that must be considered when incorporated into research. However, obtaining reference data for validation is often prohibitively expensive or practically unfeasible. We used the motion of 20 passively drifting high-accuracy GPS telemetry collars originally deployed on polar bears, Ursus maritimus, in western Hudson Bay, Canada, to validate a widely used sea ice drift dataset produced by the National Snow and Ice Data Center (NSIDC). Our results showed that the NSIDC model tended to underestimate the horizontal and vertical (i.e., u and v) components of drift. Consequently, the NSIDC model underestimated magnitude of drift, particularly at high ice speeds. Modelled drift direction was unbiased; however, it was less precise at lower drift speeds. Research using these drift data should consider integrating these biases into their analyses, particularly where absolute ground speed or direction is necessary. Further investigation is required into the sources of error, particularly in under-examined areas without in situ data. Article in Journal/Newspaper Arctic Hudson Bay National Snow and Ice Data Center Sea ice The Cryosphere Ursus maritimus Unknown Arctic Canada Hudson Hudson Bay The Cryosphere 14 6 1937 1950 |
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fttriple |
language |
English |
topic |
geo envir |
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geo envir R. R. Togunov N. J. Klappstein N. J. Lunn A. E. Derocher M. Auger-Méthé Opportunistic evaluation of modelled sea ice drift using passively drifting telemetry collars in Hudson Bay, Canada |
topic_facet |
geo envir |
description |
Sea ice drift plays a central role in the Arctic climate and ecology through its effects on the ice cover, thermodynamics, and energetics of northern marine ecosystems. Due to the challenges of accessing the Arctic, remote sensing has been used to obtain large-scale longitudinal data. These data are often associated with errors and biases that must be considered when incorporated into research. However, obtaining reference data for validation is often prohibitively expensive or practically unfeasible. We used the motion of 20 passively drifting high-accuracy GPS telemetry collars originally deployed on polar bears, Ursus maritimus, in western Hudson Bay, Canada, to validate a widely used sea ice drift dataset produced by the National Snow and Ice Data Center (NSIDC). Our results showed that the NSIDC model tended to underestimate the horizontal and vertical (i.e., u and v) components of drift. Consequently, the NSIDC model underestimated magnitude of drift, particularly at high ice speeds. Modelled drift direction was unbiased; however, it was less precise at lower drift speeds. Research using these drift data should consider integrating these biases into their analyses, particularly where absolute ground speed or direction is necessary. Further investigation is required into the sources of error, particularly in under-examined areas without in situ data. |
format |
Article in Journal/Newspaper |
author |
R. R. Togunov N. J. Klappstein N. J. Lunn A. E. Derocher M. Auger-Méthé |
author_facet |
R. R. Togunov N. J. Klappstein N. J. Lunn A. E. Derocher M. Auger-Méthé |
author_sort |
R. R. Togunov |
title |
Opportunistic evaluation of modelled sea ice drift using passively drifting telemetry collars in Hudson Bay, Canada |
title_short |
Opportunistic evaluation of modelled sea ice drift using passively drifting telemetry collars in Hudson Bay, Canada |
title_full |
Opportunistic evaluation of modelled sea ice drift using passively drifting telemetry collars in Hudson Bay, Canada |
title_fullStr |
Opportunistic evaluation of modelled sea ice drift using passively drifting telemetry collars in Hudson Bay, Canada |
title_full_unstemmed |
Opportunistic evaluation of modelled sea ice drift using passively drifting telemetry collars in Hudson Bay, Canada |
title_sort |
opportunistic evaluation of modelled sea ice drift using passively drifting telemetry collars in hudson bay, canada |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/tc-14-1937-2020 https://www.the-cryosphere.net/14/1937/2020/tc-14-1937-2020.pdf https://doaj.org/article/fc4e539feae74ec6b8670e3a0104329f |
geographic |
Arctic Canada Hudson Hudson Bay |
geographic_facet |
Arctic Canada Hudson Hudson Bay |
genre |
Arctic Hudson Bay National Snow and Ice Data Center Sea ice The Cryosphere Ursus maritimus |
genre_facet |
Arctic Hudson Bay National Snow and Ice Data Center Sea ice The Cryosphere Ursus maritimus |
op_source |
The Cryosphere, Vol 14, Pp 1937-1950 (2020) |
op_relation |
doi:10.5194/tc-14-1937-2020 1994-0416 1994-0424 https://www.the-cryosphere.net/14/1937/2020/tc-14-1937-2020.pdf https://doaj.org/article/fc4e539feae74ec6b8670e3a0104329f |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-14-1937-2020 |
container_title |
The Cryosphere |
container_volume |
14 |
container_issue |
6 |
container_start_page |
1937 |
op_container_end_page |
1950 |
_version_ |
1766329908624097280 |