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DOI | 10.1175/JCLI-D-17-0587.1 |
Understanding Bjerknes Compensation in Meridional Heat Transports and the Role of Freshwater in a Warming Climate | |
Yang, Qianzi; Zhao, Yingying; Wen, Qin; Yao, Jie; Yang, Haijun1 | |
2018-06-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:12页码:4791-4806 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | The Bjerknes compensation (BJC) under global warming is studied using a simple box model and a coupled Earth system model. The BJC states the out-of-phase changes in the meridional atmosphere and ocean heat transports. Results suggest that the BJC can occur during the transient period of global warming. During the transient period, the sea ice melting in the high latitudes can cause a significant weakening of the Atlantic meridional overturning circulation (AMOC), resulting in a cooling in the North Atlantic. The meridional contrast of sea surface temperature would be enhanced, and this can eventually enhance the Hadley cell and storm-track activities in the Northern Hemisphere. Accompanied by changes in both ocean and atmosphere circulations, the northward ocean heat transport in the Atlantic is decreased while the northward atmosphere heat transport is increased, and the BJC occurs in the Northern Hemisphere. Once the freshwater influx into the North Atlantic Ocean stops, or the ocean even loses freshwater because of strong heating in the high latitudes, the AMOC would recover. Both the atmosphere and ocean heat transports would be enhanced, and they can eventually recover to the state of the control run, leading to the BJC to become invalid. The above processes are clearly demonstrated in the coupled model CO2 experiment. Since it is difficult to separate the freshwater effect from the heating effect in the coupled model, a simple box model is used to understand the BJC mechanism and freshwater's role under global warming. In a warming climate, the freshwater flux into the ocean can cool the global surface temperature, mitigating the temperature rise. Box model experiments indicate clearly that it is the freshwater flux into the North Atlantic that causes out-of-phase changes in the atmosphere and ocean heat transports, which eventually plays a stabilizing role in global climate change. |
英文关键词 | Climate change Climate models |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000433069000001 |
WOS关键词 | THERMOHALINE CIRCULATION ; NORTH-ATLANTIC ; ENERGY TRANSPORTS ; OCEAN ; MODEL ; ATMOSPHERE ; VARIABILITY ; GCM ; PARAMETERIZATION ; INSTABILITY |
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/19405 |
专题 | 气候变化 |
作者单位 | 1.Peking Univ, Sch Phys, Lab Climate & Ocean Atmosphere Studies, Beijing, Peoples R China; 2.Peking Univ, Sch Phys, Dept Atmospher & Ocean Sci, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Yang, Qianzi,Zhao, Yingying,Wen, Qin,et al. Understanding Bjerknes Compensation in Meridional Heat Transports and the Role of Freshwater in a Warming Climate[J]. JOURNAL OF CLIMATE,2018,31(12):4791-4806. |
APA | Yang, Qianzi,Zhao, Yingying,Wen, Qin,Yao, Jie,&Yang, Haijun.(2018).Understanding Bjerknes Compensation in Meridional Heat Transports and the Role of Freshwater in a Warming Climate.JOURNAL OF CLIMATE,31(12),4791-4806. |
MLA | Yang, Qianzi,et al."Understanding Bjerknes Compensation in Meridional Heat Transports and the Role of Freshwater in a Warming Climate".JOURNAL OF CLIMATE 31.12(2018):4791-4806. |
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