气候变化领域集成服务门户(CCPortal): Opportunistic evaluation of modelled sea ice drift using passively drifting telemetry collars in Hudson Bay, Canada

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DOI	10.5194/tc-14-1937-2020
	Opportunistic evaluation of modelled sea ice drift using passively drifting telemetry collars in Hudson Bay, Canada
	Togunov R.R.; Togunov R.R.; Klappstein N.J.; Lunn N.J.; Derocher A.E.; Auger-Méthé M.; Auger-Méthé M.
发表日期	2020
ISSN	19940416
起始页码	1937
结束页码	1950
卷号	14 期号:6
英文摘要	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. © 2020 Author(s).
英文关键词	concentration (composition); ice drift; ice-ocean interaction; satellite altimetry; satellite data; sea ice; telemetry; Canada; Hudson Bay; Ursus maritimus
语种	英语
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202225
作者单位	Department of Zoology, University of British Columbia, Vancouver, BC V6T 1Z4, Canada; Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V6T 1Z4, Canada; Department of Biological Sciences, University of Alberta, Edmonton, AB T6G 2E9, Canada; Wildlife Research Division, Science and Technology Branch, Environment and Climate Change Canada, Department of Biological Sciences, University of Alberta, Edmonton, AB T6G 2E9, Canada; Department of Statistics, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
推荐引用方式 GB/T 7714	Togunov R.R.,Togunov R.R.,Klappstein N.J.,et al. Opportunistic evaluation of modelled sea ice drift using passively drifting telemetry collars in Hudson Bay, Canada[J],2020,14(6).
APA	Togunov R.R..,Togunov R.R..,Klappstein N.J..,Lunn N.J..,Derocher A.E..,...&Auger-Méthé M..(2020).Opportunistic evaluation of modelled sea ice drift using passively drifting telemetry collars in Hudson Bay, Canada.Cryosphere,14(6).
MLA	Togunov R.R.,et al."Opportunistic evaluation of modelled sea ice drift using passively drifting telemetry collars in Hudson Bay, Canada".Cryosphere 14.6(2020).