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DOI | 10.1073/pnas.1815060116 |
Slowdown of the Walker circulation at solar cycle maximum | |
Misios, Stergios1,2; Gray, Lesley J.1,3; Knudsen, Mads F.2,4; Karoff, Christoffer2,4,5; Schmidt, Hauke6; Haigh, Joanna D.7,8 | |
2019 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2019 |
卷号 | 116期号:15页码:7186-7191 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Denmark; Germany |
英文摘要 | The Pacific Walker Circulation (PWC) fluctuates on interannual and multidecadal timescales under the influence of internal variability and external forcings. Here, we provide observational evidence that the 11-y solar cycle (SC) affects the PWC on decadal timescales. We observe a robust reduction of east-west sea-level pressure gradients over the Indo-Pacific Ocean during solar maxima and the following 1-2 y. This reduction is associated with westerly wind anomalies at the surface and throughout the equatorial troposphere in the western/ central Pacific paired with an eastward shift of convective precipitation that brings more rainfall to the central Pacific. We show that this is initiated by a thermodynamical response of the global hydrological cycle to surface warming, further amplified by atmosphere-ocean coupling, leading to larger positive ocean temperature anomalies in the equatorial Pacific than expected from simple radiative forcing considerations. The observed solar modulation of the PWC is supported by a set of coupled ocean-atmosphere climate model simulations forced only by SC irradiance variations. We highlight the importance of a muted hydrology mechanism that acts to weaken the PWC. Demonstration of this mechanism acting on the 11-y SC timescale adds confidence in model predictions that the same mechanism also weakens the PWC under increasing greenhouse gas forcing. |
英文关键词 | 11-y solar cycle Walker circulation GHG forcing climate model |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000463936900010 |
WOS关键词 | SEA-LEVEL PRESSURE ; OCEAN TEMPERATURE ; PACIFIC ; SIGNALS ; DRIVEN |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
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/205086 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Oxford, Dept Phys, Oxford OX1 3PU, England; 2.Aarhus Univ, Dept Geosci, DK-8000 Aarhus C, Denmark; 3.Natl Ctr Atmospher Sci, Oxford OX1 3PU, England; 4.Aarhus Univ, iCLIMATE Interdisciplinary Ctr Climate Change, DK-8000 Aarhus C, Denmark; 5.Aarhus Univ, Dept Phys & Astron, Stellar Astrophys Ctr, DK-8000 Aarhus C, Denmark; 6.Max Planck Inst Meteorol, D-20146 Hamburg, Germany; 7.Imperial Coll London, Dept Phys, London SW7 2BW, England; 8.Imperial Coll London, Grantham Inst, London SW7 2BW, England |
推荐引用方式 GB/T 7714 | Misios, Stergios,Gray, Lesley J.,Knudsen, Mads F.,et al. Slowdown of the Walker circulation at solar cycle maximum[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2019,116(15):7186-7191. |
APA | Misios, Stergios,Gray, Lesley J.,Knudsen, Mads F.,Karoff, Christoffer,Schmidt, Hauke,&Haigh, Joanna D..(2019).Slowdown of the Walker circulation at solar cycle maximum.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,116(15),7186-7191. |
MLA | Misios, Stergios,et al."Slowdown of the Walker circulation at solar cycle maximum".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 116.15(2019):7186-7191. |
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