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DOI | 10.1175/JCLI-D-17-0825.1 |
Can the Salt-Advection Feedback Be Detected in Internal Variability of the Atlantic Meridional Overturning Circulation? | |
Cheng, Wei1,2; Weijer, Wilbert3; Kim, Who M.4; Danabasoglu, Gokhan4; Yeager, Steve G.4; Gent, Peter R.4; Zhang, Dongxiao1,2; Chiang, John C. H.5; Zhang, Jiaxu3 | |
2018-08-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:16页码:6649-6667 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Evidence for the assumptions of the salt-advection feedback in box models is sought by studying the Atlantic meridional overturning circulation (AMOC) internal variability in the long preindustrial control runs of two Earth system models. The first assumption is that AMOC strength is proportional to the meridional density difference between the North Atlantic and the Southern Oceans. The model simulations support this assumption, with the caveat that nearly all the long time-scale variability occurs in the North Atlantic density. The second assumption is that the freshwater transport variability by the overturning at the Atlantic southern boundary is controlled by the strength of AMOC. Only one of the models shows some evidence that AMOC variability at 45 degrees N leads variability in the overturning freshwater transport at the southern boundary by about 30 years, but the other model shows no such coherence. In contrast, in both models this freshwater transport variability is dominated by local salinity variations. The third assumption is that changes in the overturning freshwater transport at the Atlantic southern boundary perturb the north-south density difference, and thus feed back on AMOC strength in the north. No evidence for this assumption is found in either model at any time scale, although this does not rule out that the salt-advection feedback may be excited by a strong enough freshwater perturbation. |
英文关键词 | Feedback Meridional overturning circulation Coupled models Model output statistics Numerical analysis modeling Oceanic variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000439094900004 |
WOS关键词 | MULTIPLE EQUILIBRIA REGIME ; FRESH-WATER ; SOUTH ATLANTIC ; GLOBAL OCEAN ; CLIMATE MODEL ; AMOC ; STABILITY ; INDICATOR ; TRANSPORT ; GRADIENTS |
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/19357 |
专题 | 气候变化 |
作者单位 | 1.Univ Washington, Joint Inst Study Atmosphere & Ocean, Seattle, WA 98195 USA; 2.NOAA, Pacific Marine Environm Lab, 7600 Sand Point Way Ne, Seattle, WA 98115 USA; 3.Los Alamos Natl Lab, Los Alamos, NM USA; 4.Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA; 5.Univ Calif Berkeley, Berkeley, CA 94720 USA |
推荐引用方式 GB/T 7714 | Cheng, Wei,Weijer, Wilbert,Kim, Who M.,et al. Can the Salt-Advection Feedback Be Detected in Internal Variability of the Atlantic Meridional Overturning Circulation?[J]. JOURNAL OF CLIMATE,2018,31(16):6649-6667. |
APA | Cheng, Wei.,Weijer, Wilbert.,Kim, Who M..,Danabasoglu, Gokhan.,Yeager, Steve G..,...&Zhang, Jiaxu.(2018).Can the Salt-Advection Feedback Be Detected in Internal Variability of the Atlantic Meridional Overturning Circulation?.JOURNAL OF CLIMATE,31(16),6649-6667. |
MLA | Cheng, Wei,et al."Can the Salt-Advection Feedback Be Detected in Internal Variability of the Atlantic Meridional Overturning Circulation?".JOURNAL OF CLIMATE 31.16(2018):6649-6667. |
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