DOI: 10.1002/2016GL069596
论文题名: Strong winter cooling over the Irminger Sea in winter 2014–2015, exceptional deep convection, and the emergence of anomalously low SST
作者: de Jong M.F. ; de Steur L.
刊名: Geophysical Research Letters
ISSN: 0094-8954
EISSN: 1944-8685
出版年: 2016
卷: 43, 期: 13 起始页码: 7106
结束页码: 7113
语种: 英语
英文关键词: Atlantic Meridional Overturning Circulation
; deep convection
; Irminger Sea
; sea surface temperature anomaly
; surface forcing
; time series
Scopus关键词: Atmospheric pressure
; Atmospheric temperature
; Natural convection
; Submarine geophysics
; Surface properties
; Surface waters
; Time series
; Atlantic meridional overturning circulations
; Deep convection
; Irminger seas
; Sea surface temperature anomalies
; Surface forcing
; Oceanography
英文摘要: Deep convection is presumed to be vital for the North Atlantic Meridional Overturning Circulation, even though observational evidence for the link remains inconclusive. Modeling studies have suggested that convection will weaken as a result of enhanced freshwater input. The emergence of anomalously low sea surface temperature in the subpolar North Atlantic has led to speculation that this process is already at work. Here we show that strong atmospheric forcing in the winter of 2014–2015, associated with a high North Atlantic Oscillation (NAO) index, produced record mixed layer depths in the Irminger Sea. Local mixing removed the stratification of the upper 1400 m and ventilated the basin to middepths resembling a state similar to the mid-1990s when a positive NAO also prevailed. We show that the strong local atmospheric forcing is predominantly responsible for the negative sea surface temperature anomalies observed in the subpolar North Atlantic in 2015 and that there is no evidence of permanently weakened deep convection. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978204213&doi=10.1002%2f2016GL069596&partnerID=40&md5=65590f0eaba12fbf307591ad15a6639b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9917
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: Royal Netherlands Institute for Sea Research NIOZ, Texel, Netherlands
Recommended Citation:
de Jong M.F.,de Steur L.. Strong winter cooling over the Irminger Sea in winter 2014–2015, exceptional deep convection, and the emergence of anomalously low SST[J]. Geophysical Research Letters,2016-01-01,43(13).