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DOI | 10.1175/JCLI-D-18-0438.1 |
Oceanic Overturning and Heat Transport: The Role of Background Diffusivity | |
Hieronymus, Magnus1,2; Nycander, Jonas1; Nilsson, Johan1; Doos, Kristofer1; Hallberg, Robert3 | |
2019-02-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:3页码:701-716 |
文章类型 | Article |
语种 | 英语 |
国家 | Sweden; USA |
英文摘要 | The role of oceanic background diapycnal diffusion for the equilibrium climate state is investigated in the global coupled climate model CM2G. Special emphasis is put on the oceanic meridional overturning and heat transport. Six runs with the model, differing only by their value of the background diffusivity, are run to steady state and the statistically steady integrations are compared. The diffusivity changes have large-scale impacts on many aspects of the climate system. Two examples are the volume-mean potential temperature, which increases by 3.6 degrees C between the least and most diffusive runs, and the Antarctic sea ice extent, which decreases rapidly as the diffusivity increases. The overturning scaling with diffusivity is found to agree rather well with classical theoretical results for the upper but not for the lower cell. An alternative empirical scaling with the mixing energy is found to give good results for both cells. The oceanic meridional heat transport increases strongly with the diffusivity, an increase that can only partly be explained by increases in the meridional overturning. The increasing poleward oceanic heat transport is accompanied by a decrease in its atmospheric counterpart, which keeps the increase in the planetary energy transport small compared to that in the ocean. |
英文关键词 | Diapycnal mixing Diffusion Ocean circulation Energy transport |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000455005000002 |
WOS关键词 | LARGE-SCALE CIRCULATION ; SOUTHERN-OCEAN ; PART I ; CLIMATE ; ENERGY ; SENSITIVITY ; MODEL ; STRATIFICATION ; DISSIPATION ; ATMOSPHERE |
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/20147 |
专题 | 气候变化 |
作者单位 | 1.Stockholm Univ, Dept Meteorol, Stockholm, Sweden; 2.Swedish Meteorol & Hydrol Inst, Norrkoping, Sweden; 3.NOAA, Geophys Fluid Dynam Lab, Princeton, NJ USA |
推荐引用方式 GB/T 7714 | Hieronymus, Magnus,Nycander, Jonas,Nilsson, Johan,et al. Oceanic Overturning and Heat Transport: The Role of Background Diffusivity[J]. JOURNAL OF CLIMATE,2019,32(3):701-716. |
APA | Hieronymus, Magnus,Nycander, Jonas,Nilsson, Johan,Doos, Kristofer,&Hallberg, Robert.(2019).Oceanic Overturning and Heat Transport: The Role of Background Diffusivity.JOURNAL OF CLIMATE,32(3),701-716. |
MLA | Hieronymus, Magnus,et al."Oceanic Overturning and Heat Transport: The Role of Background Diffusivity".JOURNAL OF CLIMATE 32.3(2019):701-716. |
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