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DOI | 10.1038/s41558-018-0247-1 |
Pacific contribution to the early twentieth-century warming in the Arctic | |
Svendsen, Lea1,2; Keenlyside, Noel1,2; Bethke, Ingo2,4; Gao, Yongqi2,3,5; Omrani, Nour-Eddine1,2 | |
2018-09-01 | |
发表期刊 | NATURE CLIMATE CHANGE
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ISSN | 1758-678X |
EISSN | 1758-6798 |
出版年 | 2018 |
卷号 | 8期号:9页码:793-+ |
文章类型 | Article |
语种 | 英语 |
国家 | Norway; Peoples R China |
英文摘要 | Arctic surface temperature warmed more than twice as fast as global temperature during the early twentieth century, similar to that during the recent global warming. This Arctic warming has been attributed to both external forcing(1) and internal variability associated with atmospheric dynamics(2,3) and Atlantic Ocean temperature(4) in combination with Pacific variability(5). Here we show, through coupled climate model experiments that superpose externally forced and dynamically driven changes, that Pacific decadal variability alone was a key contributor to the early twentieth century Arctic warming. Sea surface temperatures in the model are phased to observations by prescribing historical wind variations over the Pacific, which drive thermodynamically consistent decadal variations. During the early twentieth century, the Pacific Decadal Oscillation (PDO) transitioned to a positive phase with a concomitant deepening of the Aleutian Low that warms the Arctic by poleward low-level advection of extratropical air. In addition, our experiments revealed that the implemented Pacific surface changes weaken the polar vortex, which leads to subsidence-induced adiabatic heating of the Arctic surface. Thus, our results suggest that the observed recent shift to the positive PDO phase(6) will intensify Arctic warming in the forthcoming decades. |
领域 | 资源环境 |
收录类别 | SCI-E ; SSCI |
WOS记录号 | WOS:000443195300016 |
WOS关键词 | EARTH SYSTEM MODEL ; SURFACE-TEMPERATURE ; TROPICAL PACIFIC ; 20TH-CENTURY ; ATLANTIC ; ENSO |
WOS类目 | Environmental Sciences ; Environmental Studies ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; 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/34193 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Bergen, Geophys Inst, Bergen, Norway; 2.Bjerknes Ctr Climate Res, Bergen, Norway; 3.Nansen Environm & Remote Sensing Ctr, Bergen, Norway; 4.Uni Res Climate, Bergen, Norway; 5.Chinese Acad Sci, Nansen Zhu Int Res Ctr, Inst Atmospher Phys, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Svendsen, Lea,Keenlyside, Noel,Bethke, Ingo,et al. Pacific contribution to the early twentieth-century warming in the Arctic[J]. NATURE CLIMATE CHANGE,2018,8(9):793-+. |
APA | Svendsen, Lea,Keenlyside, Noel,Bethke, Ingo,Gao, Yongqi,&Omrani, Nour-Eddine.(2018).Pacific contribution to the early twentieth-century warming in the Arctic.NATURE CLIMATE CHANGE,8(9),793-+. |
MLA | Svendsen, Lea,et al."Pacific contribution to the early twentieth-century warming in the Arctic".NATURE CLIMATE CHANGE 8.9(2018):793-+. |
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