DOI: 10.1002/grl.50098
论文题名: Recent changes in pan-Arctic melt onset from satellite passive microwave measurements
作者: Wang L. ; Derksen C. ; Brown R. ; Markus T.
刊名: Geophysical Research Letters
ISSN: 0094-9320
EISSN: 1944-9051
出版年: 2013
卷: 40, 期: 3 起始页码: 522
结束页码: 528
语种: 英语
英文关键词: melt onset
; pan-Arctic
; satellite passive microwave
Scopus关键词: Climatology
; Digital storage
; Radar
; Radar measurement
; Sea ice
; Snow
; Atmospheric circulation
; Brightness temperatures
; Low-frequency modes
; melt onset
; Pan-Arctic
; Retrieval algorithms
; Satellite passive microwave
; Temporal variation
; Satellites
; air temperature
; algorithm
; brightness temperature
; data set
; frequency-magnitude distribution
; microwave radiation
; radar
; satellite data
; snow cover
; temporal variation
; Arctic
; Eurasia
英文摘要: A new satellite passive microwave (PMW) melt onset retrieval algorithm based on temporal variations in the differences of the brightness temperature between 19 and 37 GHz is shown to be as effective as radar (e.g., QuikScat) measurements. The PMW technique shows improved melt estimates that are more closely linked to observed snow-off dates than previous studies. An integrated pan-Arctic (north of 50°N) melt onset date (MOD) dataset is produced by combining estimates on land and sea ice for the entire satellite PMW record. During the 1979-2011 period, significant trends of 2~3 days (decade) -1 to earlier MOD are mainly concentrated over the Eurasian land sector of the Arctic, consistent with changes in spring snow cover extent observed with visible satellite data. The variability and change in melt onset are largely driven by spring surface air temperature, with insignificant influence from low-frequency modes of atmospheric circulation. Key Points New satellite PMW melt detection technique as effective as active radar Significant early trends in Eurasia, consistent with changes in spring SCE Variability and change in MOD are largely driven by spring SAT ©2012. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84878203099&doi=10.1002%2fgrl.50098&partnerID=40&md5=89c8357d712f792d2759841683454654
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6584
Appears in Collections: 气候减缓与适应
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作者单位: Climate Research Division, Atmospheric Science and Technology Directorate, Environment Canada, 4905 Dufferin St., Toronto, ON M3H 5T4, Canada
Recommended Citation:
Wang L.,Derksen C.,Brown R.,et al. Recent changes in pan-Arctic melt onset from satellite passive microwave measurements[J]. Geophysical Research Letters,2013-01-01,40(3).