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DOI | 10.1007/s00382-017-3523-2 |
The role of atmospheric heat transport and regional feedbacks in the Arctic warming at equilibrium | |
Yoshimori, Masakazu1,2; Abe-Ouchi, Ayako3,4,5; Laine, Alexandre3,4 | |
2017-11-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 49 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan |
英文摘要 | It is well known that the Arctic warms much more than the rest of the world even under spatially quasi-uniform radiative forcing such as that due to an increase in atmospheric CO2 concentration. While the surface albedo feedback is often referred to as the explanation of the enhanced Arctic warming, the importance of atmospheric heat transport from the lower latitudes has also been reported in previous studies. In the current study, an attempt is made to understand how the regional feedbacks in the Arctic are induced by the change in atmospheric heat transport and vice versa. Equilibrium sensitivity experiments that enable us to separate the contributions of the Northern Hemisphere mid-high latitude response to the CO2 increase and the remote influence of surface warming in other regions are carried out. The result shows that the effect of remote forcing is predominant in the Arctic warming. The dry-static energy transport to the Arctic is reduced once the Arctic surface warms in response to the local or remote forcing. The feedback analysis based on the energy budget reveals that the increased moisture transport from lower latitudes, on the other hand, warms the Arctic in winter more effectively not only via latent heat release but also via greenhouse effect of water vapor and clouds. The change in total atmospheric heat transport determined as a result of counteracting dry-static and latent heat components, therefore, is not a reliable measure for the net effect of atmospheric dynamics on the Arctic warming. The current numerical experiments support a recent interpretation based on the regression analysis: the concurrent reduction in the atmospheric poleward heat transport and future Arctic warming predicted in some models does not imply a minor role of the atmospheric dynamics. Despite the similar magnitude of poleward heat transport change, the Arctic warms more than the Southern Ocean even in the equilibrium response without ocean dynamics. It is shown that a large negative shortwave cloud feedback over the Southern Ocean, greatly influenced by low-latitude surface warming, is responsible for this asymmetric polar warming. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000414153800030 |
WOS关键词 | POLAR AMPLIFICATION ; VERTICAL STRUCTURE ; CLIMATE-CHANGE ; ENERGY-TRANSPORT ; CLOUD RESPONSE ; MIROC GCM ; SEASONALITY ; MODELS ; CMIP5 ; MULTIMODEL |
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/36445 |
专题 | 气候变化 |
作者单位 | 1.Hokkaido Univ, Global Inst Collaborat Res & Educ, Fac Environm Earth Sci, Kita Ku, Kita 10,Nishi 5, Sapporo, Hokkaido 0600810, Japan; 2.Hokkaido Univ, Arctic Res Ctr, Kita Ku, Kita 10,Nishi 5, Sapporo, Hokkaido 0600810, Japan; 3.Univ Tokyo, Atmosphere & Ocean Res Inst, Kashiwa, Chiba, Japan; 4.Natl Inst Polar Res, Tokyo, Japan; 5.Japan Agcy Marine Earth Sci & Technol, Yokohama, Kanagawa, Japan |
推荐引用方式 GB/T 7714 | Yoshimori, Masakazu,Abe-Ouchi, Ayako,Laine, Alexandre. The role of atmospheric heat transport and regional feedbacks in the Arctic warming at equilibrium[J]. CLIMATE DYNAMICS,2017,49. |
APA | Yoshimori, Masakazu,Abe-Ouchi, Ayako,&Laine, Alexandre.(2017).The role of atmospheric heat transport and regional feedbacks in the Arctic warming at equilibrium.CLIMATE DYNAMICS,49. |
MLA | Yoshimori, Masakazu,et al."The role of atmospheric heat transport and regional feedbacks in the Arctic warming at equilibrium".CLIMATE DYNAMICS 49(2017). |
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