Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-16-0581.1 |
Transient Climate Sensitivity Depends on Base Climate Ocean Circulation | |
He, Jie1,2; Winton, Michael2; Vecchi, Gabriel2; Jia, Liwei1,2; Rugenstein, Maria3 | |
2017-02-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Switzerland |
英文摘要 | There is large uncertainty in the simulation of transient climate sensitivity. This study aims to understand how such uncertainty is related to the simulation of the base climate by comparing two simulations with the samemodel but in which CO2 is increased from either a preindustrial (1860) or a present-day (1990) control simulation. This allows different base climate ocean circulations that are representative of those in current climate models to be imposed upon a single model. As a result, the model projects different transient climate sensitivities that are comparable to themultimodel spread. The greater warming in the 1990-start run occurs primarily at high latitudes and particularly over regions of oceanic convection. In the 1990-start run, ocean overturning circulations are initially weaker and weaken less from CO2 forcing. As a consequence, there are smaller reductions in the poleward ocean heat transport, leading to less tropical ocean heat storage and less moderated high-latitude surface warming. This process is evident in both hemispheres, with changes in the Atlantic meridional overturning circulation and the Antarctic Bottom Water formation dominating the warming differences in each hemisphere. The high-latitude warming in the 1990-start run is enhanced through albedo and cloud feedbacks, resulting in a smaller ocean heat uptake efficacy. The results highlight the importance of improving the base climate ocean circulation in order to provide a reasonable starting point for assessments of past climate change and the projection of future climate change. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000395522400019 |
WOS关键词 | MERIDIONAL OVERTURNING CIRCULATION ; SEA-LEVEL RISE ; SOUTHERN-OCEAN ; HEAT UPTAKE ; RADIATIVE FEEDBACKS ; GLOBAL HEAT ; IMPACT ; SIMULATIONS ; TEMPERATURE ; PATTERNS |
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/19607 |
专题 | 气候变化 |
作者单位 | 1.Princeton Univ, Program Atmospher & Ocean Sci, Princeton, NJ 08544 USA; 2.NOAA, Geophys Fluid Dynam Lab, Princeton, NJ USA; 3.ETH, Inst Atmospher & Climate Sci, Zurich, Switzerland |
推荐引用方式 GB/T 7714 | He, Jie,Winton, Michael,Vecchi, Gabriel,et al. Transient Climate Sensitivity Depends on Base Climate Ocean Circulation[J]. JOURNAL OF CLIMATE,2017,30(4). |
APA | He, Jie,Winton, Michael,Vecchi, Gabriel,Jia, Liwei,&Rugenstein, Maria.(2017).Transient Climate Sensitivity Depends on Base Climate Ocean Circulation.JOURNAL OF CLIMATE,30(4). |
MLA | He, Jie,et al."Transient Climate Sensitivity Depends on Base Climate Ocean Circulation".JOURNAL OF CLIMATE 30.4(2017). |
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