DOI: 10.1002/2017JC013553
Scopus记录号: 2-s2.0-85045706911
论文题名: Wind-Driven Cross-Shelf Exchange—West Spitsbergen Current as a Source of Heat and Salt for the Adjacent Shelf in Arctic Winters
作者: Goszczko I. ; Ingvaldsen R.B. ; Onarheim I.H.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 4 起始页码: 2668
结束页码: 2696
语种: 英语
英文关键词: air-sea interaction
; Arctic climate
; cross-shelf exchange
; Nordic Seas
; water masses
; West Spitsbergen Current
Scopus关键词: air-sea interaction
; climate change
; Ekman transport
; heat source
; outflow
; salinity
; salt
; sea surface temperature
; water mass
; westerly
; wind velocity
; wind-driven circulation
; winter
; Arctic
; Arctic Ocean
; Arctic Ocean
; Atlantic Ocean
; Barents Sea
; Svalbard
; Svalbard and Jan Mayen
; West Spitsbergen Current
英文摘要: Cross-shelf exchange can drive substantial hydrographic changes on shelves and along slopes. In this study, time series from moorings, profiles collected by a tagged seal, atmospheric reanalysis data, and weather regimes classification were used to investigate cross-shelf exchange at the slope-shelf interface south-west of Spitsbergen during the four winters 2011–2014. Assessment of Ekman transport (ET) as a driving force and linking cross-shelf exchange to large-scale weather patterns were in focus. Strong positive correlations were found between zonal ET and hydrographic observations on the shelf, indicating its strong impact on cross-shelf exchange. Strong negative correlations were found between the meridional ET and temperature and salinity measured on the shelf in winter 2012, indicating a suppressing role of westerly winds on fresher and colder outflows from the Barents Sea. The ETs in a wider area near the Svalbard Archipelago show substantial variations on short-term, interannual and long-term time scales due to changes in large-scale atmospheric patterns. The regional wind speed shows a significant negative trend in winters between 1992 and 2016. At the same time, cumulative winter zonal ET increased on the north-western Spitsbergen shelf, indicating a higher overall cross-shelf exchange along the western Spitsbergen shelf break, while meridional ET south-west of Spitsbergen decreased, indicating a reduced outflow of fresher and colder water from the Barents Sea. For the time period between 1980 and 2016, the winter air and sea surface temperatures (sea-ice fraction) exhibit significant positive (negative) trends which even multiplied by factor of 2–3 in winters 2004–2016. © 2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114190
Appears in Collections: 气候减缓与适应
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作者单位: Institute of Oceanology, Polish Academy of Sciences, Sopot, Poland; Institute of Marine Research, Bergen, Norway; Geophysical Institute, University of Bergen, Bergen, Norway; Bjerknes Centre for Climate Research, Bergen, Norway
Recommended Citation:
Goszczko I.,Ingvaldsen R.B.,Onarheim I.H.. Wind-Driven Cross-Shelf Exchange—West Spitsbergen Current as a Source of Heat and Salt for the Adjacent Shelf in Arctic Winters[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(4)