Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-019-04998-5 |
Temperature domination of AMOC weakening due to freshwater hosing in two GCMs | |
Haskins, Rosalind K.1; Oliver, Kevin I. C.1; Jackson, Laura C.2; Wood, Richard A.2; Drijfhout, Sybren S.1 | |
2019-10-04 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | England |
英文摘要 | Anthropogenic climate change is projected to lead to a weakening of the Atlantic meridional overturning circulation (AMOC). One of the mechanisms contributing to this is ice melt leading to a freshening of the North Atlantic Ocean. We use two global climate models to investigate the role of temperature and salinity in the weakening of the AMOC resulting from freshwater forcing. This study finds that freshwater hosing reduces the strength of the AMOC, but in some situations it is not through reduced density from freshening, but a reduction in density from subsurface warming. When the freshwater is mixed down it directly reduces the density of the North Atlantic, weakening the strength of the AMOC. As the AMOC weakens, the mixed layer depth reduces and surface properties are less effectively mixed down. A buoyant surface cap forms, blocking atmospheric fluxes. This leads to the development of a warm anomaly beneath the surface cap, which becomes the primary driver of AMOC weakening. We found that the mean North Atlantic salinity anomaly can be used as a proxy for AMOC weakening because it describes the extent of this surface cap. |
英文关键词 | AMOC Thermohaline circulation Hosing Density Model GCM |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000488947400001 |
WOS关键词 | MERIDIONAL OVERTURNING CIRCULATION ; CLIMATE MODEL ; THERMOHALINE CIRCULATION ; OCEAN CIRCULATION ; COUPLED MODEL ; VERSION ; FEEDBACKS ; BOUNDARY ; RECOVERY ; SHUTDOWN |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/187578 |
专题 | 气候变化 |
作者单位 | 1.Univ Southampton, Southampton, Hants, England; 2.Met Off Hadley Ctr, Exeter, Devon, England |
推荐引用方式 GB/T 7714 | Haskins, Rosalind K.,Oliver, Kevin I. C.,Jackson, Laura C.,et al. Temperature domination of AMOC weakening due to freshwater hosing in two GCMs[J]. CLIMATE DYNAMICS,2019. |
APA | Haskins, Rosalind K.,Oliver, Kevin I. C.,Jackson, Laura C.,Wood, Richard A.,&Drijfhout, Sybren S..(2019).Temperature domination of AMOC weakening due to freshwater hosing in two GCMs.CLIMATE DYNAMICS. |
MLA | Haskins, Rosalind K.,et al."Temperature domination of AMOC weakening due to freshwater hosing in two GCMs".CLIMATE DYNAMICS (2019). |
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