globalchange  > 科学计划与规划
DOI: 10.1002/2016GL067861
论文题名:
Southern Ocean deep convection as a driver of Antarctic warming events
作者: Pedro J.B.; Martin T.; Steig E.J.; Jochum M.; Park W.; Rasmussen S.O.
刊名: Geophysical Research Letters
ISSN: 0094-9283
EISSN: 1944-9014
出版年: 2016
卷: 43, 期:5
起始页码: 2192
结束页码: 2199
语种: 英语
英文关键词: Antarctic climate ; deep convection ; internal variability ; sea ice ; Southern Ocean ; Weddell Sea Polynya
Scopus关键词: Atmospheric movements ; Atmospheric temperature ; Climate change ; Climate models ; Ice ; Natural convection ; Oceanography ; Sea ice ; Surface waters ; Antarctic climate ; Deep convection ; Internal variability ; Southern ocean ; Weddell Sea ; Heat convection
英文摘要: Simulations with a free-running coupled climate model show that heat release associated with Southern Ocean deep convection variability can drive centennial-scale Antarctic temperature variations of up to 2.0°C. The mechanism involves three steps: Preconditioning: Heat accumulates at depth in the Southern Ocean; Convection onset: Wind and/or sea ice changes tip the buoyantly unstable system into the convective state; and Antarctic warming: Fast sea ice-albedo feedbacks (on annual-decadal time scales) and slow Southern Ocean frontal and sea surface temperature adjustments to convective heat release (on multidecadal-century time scales) drive an increase in atmospheric heat and moisture transport toward Antarctica. We discuss the potential of this mechanism to help drive and amplify climate variability as observed in Antarctic ice core records. © 2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84960434741&doi=10.1002%2f2016GL067861&partnerID=40&md5=969c9a04250a91502b846c97fba7687b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10246
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: Center for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark

Recommended Citation:
Pedro J.B.,Martin T.,Steig E.J.,et al. Southern Ocean deep convection as a driver of Antarctic warming events[J]. Geophysical Research Letters,2016-01-01,43(5).
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