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DOI | 10.1175/JCLI-D-17-0761.1 |
Southern Ocean Heat Uptake, Redistribution, and Storage in a Warming Climate: The Role of Meridional Overturning Circulation | |
Liu, Wei1,2,3; Lu, Jian4; Xie, Shang-Ping2; Fedorov, Alexey3 | |
2018-06-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:12页码:4727-4743 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Climate models show that most of the anthropogenic heat resulting from increased atmospheric CO2 enters the Southern Ocean near 60 degrees S and is stored around 45 degrees S. This heat is transported to the ocean interior by the meridional overturning circulation (MOC) with wind changes playing an important role in the process. To isolate and quantify the latter effect, we apply an overriding technique to a climate model and decompose the total ocean response to CO2 increase into two major components: one due to wind changes and the other due to direct CO2 effect. We find that the poleward-intensified zonal surface winds tend to shift and strengthen the ocean Deacon cell and hence the residual MOC, leading to anomalous divergence of ocean meridional heat transport around 60 degrees S coupled to a surface heat flux increase. In contrast, at 45 degrees S we see anomalous convergence of ocean heat transport and heat loss at the surface. As a result, the wind-induced ocean heat storage (OHS) peaks at 46 degrees S at a rate of 0.07 ZJ yr(-1) (degrees lat)(-1) (1 ZJ = 10(21) J), contributing 20% to the total OHS maximum. The direct CO2 effect, on the other hand, very slightly alters the residual MOC but primarily warms the ocean. It induces a small but nonnegligible change in eddy heat transport and causes OHS to peak at 42 degrees S at a rate of 0.30 ZJ yr(-1) (degrees lat)(-1), accounting for 80% of the OHS maximum. We also find that the eddy-induced MOC weakens, primarily caused by a buoyancy flux change as a result of the direct CO2 effect, and does not compensate the intensified Deacon cell. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000450688200008 |
WOS关键词 | SEA-ICE ; ATMOSPHERE MODEL ; TRANSIENT-RESPONSE ; MESOSCALE EDDIES ; WINDS ; CO2 ; SENSITIVITY ; MECHANISMS ; DEPENDENCE ; CARBON |
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/20872 |
专题 | 气候变化 |
作者单位 | 1.Univ Calif Riverside, Dept Earth Sci, Riverside, CA 92521 USA; 2.Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA; 3.Yale Univ, Dept Geol & Geophys, New Haven, CT 06520 USA; 4.Pacific Northwest Natl Lab, Richland, WA 99352 USA |
推荐引用方式 GB/T 7714 | Liu, Wei,Lu, Jian,Xie, Shang-Ping,et al. Southern Ocean Heat Uptake, Redistribution, and Storage in a Warming Climate: The Role of Meridional Overturning Circulation[J]. JOURNAL OF CLIMATE,2018,31(12):4727-4743. |
APA | Liu, Wei,Lu, Jian,Xie, Shang-Ping,&Fedorov, Alexey.(2018).Southern Ocean Heat Uptake, Redistribution, and Storage in a Warming Climate: The Role of Meridional Overturning Circulation.JOURNAL OF CLIMATE,31(12),4727-4743. |
MLA | Liu, Wei,et al."Southern Ocean Heat Uptake, Redistribution, and Storage in a Warming Climate: The Role of Meridional Overturning Circulation".JOURNAL OF CLIMATE 31.12(2018):4727-4743. |
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