DOI: 10.1002/2015GL066565
论文题名: Episodic warming of near-bottom waters under the Arctic sea ice on the central Laptev Sea shelf
作者: Janout M. ; Hölemann J. ; Juhls B. ; Krumpen T. ; Rabe B. ; Bauch D. ; Wegner C. ; Kassens H. ; Timokhov L.
刊名: Geophysical Research Letters
ISSN: 0094-9532
EISSN: 1944-9263
出版年: 2016
卷: 43, 期: 1 起始页码: 264
结束页码: 272
语种: 英语
英文关键词: Arctic oceanography
; Arctic sea ice
; Laptev Sea
; ocean warming
; Siberian freshwater
Scopus关键词: Oceanography
; Satellite imagery
; Sea ice
; Surface waters
; Arctic sea ice
; Brine rejections
; Laptev Sea
; Ocean warming
; River discharge
; Sea ice formations
; Siberian freshwater
; Temperature variability
; Ice
; bottom water
; episodic event
; freshwater input
; heat flux
; hydrograph
; ice retreat
; methane
; mooring system
; permafrost
; pycnocline
; river discharge
; satellite imagery
; sea ice
; solar radiation
; spatiotemporal analysis
; thermal alteration
; warming
; Arctic Ocean
; Laptev Sea
; Lena River
; Russian Federation
; Siberia
英文摘要: A multiyear mooring record (2007-2014) and satellite imagery highlight the strong temperature variability and unique hydrographic nature of the Laptev Sea. This Arctic shelf is a key region for river discharge and sea ice formation and export and includes submarine permafrost and methane deposits, which emphasizes the need to understand the thermal variability near the seafloor. Recent years were characterized by early ice retreat and a warming near-shore environment. However, warming was not observed on the deeper shelf until year-round under-ice measurements recorded unprecedented warm near-bottom waters of +0.6°C in winter 2012/2013, just after the Arctic sea ice extent featured a record minimum. In the Laptev Sea, early ice retreat in 2012 combined with Lena River heat and solar radiation produced anomalously warm summer surface waters, which were vertically mixed, trapped in the pycnocline, and subsequently transferred toward the bottom until the water column cooled when brine rejection eroded stratification. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84957727777&doi=10.1002%2f2015GL066565&partnerID=40&md5=5e503b69b57641ba76ea08640d63746c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10495
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
Recommended Citation:
Janout M.,Hölemann J.,Juhls B.,et al. Episodic warming of near-bottom waters under the Arctic sea ice on the central Laptev Sea shelf[J]. Geophysical Research Letters,2016-01-01,43(1).