| DOI: | 10.1029/2019EA000776
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| 论文题名: | Using CloudSat-CPR Retrievals to Estimate Snow Accumulation in the Canadian Arctic |
| 作者: | King F.; Fletcher C.G.
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| 刊名: | Earth and Space Science
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| ISSN: | 23335084
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| 出版年: | 2020
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| 卷: | 7, 期:2 | | 语种: | 英语
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| 英文关键词: | Arctic
; CloudSat
; radar
; remote sensing
; snow
; SWE
|
| Scopus关键词: | CloudSat
; correlation
; estimation method
; flooding
; model validation
; radar
; remote sensing
; snow accumulation
; snow water equivalent
; time series analysis
; water resource
; weather station
; Arctic
; Canada
; Canadian Arctic
; Cornwallis Island
; Ellesmere Island
; Eureka
; Nunavut
; Queen Elizabeth Islands
; Resolute Bay
|
| 英文摘要: | Snow is a critical contributor to our global water and energy budget, with profound impacts for water resource availability and flooding in cold regions. The vast size and remote nature of the Arctic present serious logistical and financial challenges to measuring snow over extended time periods. Satellite observations provided by the Cloud Profiling Radar instrument—installed on the National Aeronautics and Space Administration satellite CloudSat—allow the retrieval of snowfall rates in high-latitude regions, which have been used to estimate surface snow accumulation. In this study, a validation of CloudSat-derived terrestrial snow estimates is presented at four Environment and Climate Change Canada weather stations situated in the Arctic for the common period 2007–2015. Comparisons of monthly climatological snow accumulation show mean biases of less than 1.5-mm snow water equivalent annually. Monthly time series exhibit correlations above 0.5 and root-mean-square error below 10-mm snow water equivalent at the two highest-latitude stations (Eureka and Resolute Bay) with correlations falling below 0.5 south of 70°N. CloudSat was also found to underestimate annual mean snow accumulation at the majority of sites, suggesting a potential negative bias in CloudSat's accumulation estimates, or underestimation related to sampling. These results imply that CloudSat can provide reliable estimates of snow accumulation across similar high-latitude regions above 70°N. ©2020. The Authors. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/159920
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| Appears in Collections: | 气候变化与战略
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作者单位: | Department of Geography and Environmental Management, University of Waterloo, Waterloo, ON, Canada
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| Recommended Citation: | |
King F.,Fletcher C.G.. Using CloudSat-CPR Retrievals to Estimate Snow Accumulation in the Canadian Arctic[J]. Earth and Space Science,2020-01-01,7(2)
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