Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1717707117 |
Influence of Arctic sea-ice variability on Pacific trade winds | |
Kennel, Charles F.1,2; Yulaeva, Elena3 | |
2020-02-11 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2020 |
卷号 | 117期号:6页码:2824-2834 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England |
英文摘要 | A conceptual model connecting seasonal loss of Arctic sea ice to midlatitude extreme weather events is applied to the 21st-century intensification of Central Pacific trade winds, emergence of Central Pacific El Nino events, and weakening of the North Pacific Aleutian Low Circulation. According to the model, Arctic Ocean warming following the summer sea-ice melt drives vertical convection that perturbs the upper troposphere. Static stability calculations show that upward convection occurs in annual 40- to 45-d episodes over the seasonally ice-free areas of the Beaufort-to-Kara Sea arc. The episodes generate planetary waves and higher-frequency wave trains that transport momentum and heat southward in the upper troposphere. Regression of upper tropospheric circulation data on September sea-ice area indicates that convection episodes produce wave-mediated teleconnections between the maximum ice-loss region north of the Siberian Arctic coast and the Intertropical Convergence Zone (ITCZ). These teleconnections generate oppositely directed trade-wind anomalies in the Central and Eastern Pacific during boreal winter. The interaction of upper troposphere waves with the ITCZ air-sea column may also trigger Central Pacific El Nino events. Finally, waves reflected northward from the ITCZ air column and/or generated by triggered El Nino events may be responsible for the late winter weakening of the Aleutian Low Circulation in recent years. |
英文关键词 | Arctic sea ice decadal variability Pacific trade winds Central Pacific El Nino Aleutian Low |
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:000513898000020 |
WOS关键词 | EL-NINO ; SURFACE TEMPERATURE ; EQUATORIAL PACIFIC ; CLIMATE VARIABILITY ; DECADAL VARIABILITY ; EASTERN-PACIFIC ; MELT-SEASON ; LONG-TERM ; REANALYSIS ; AMPLIFICATION |
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/249618 |
专题 | 地球科学 |
作者单位 | 1.Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA; 2.Univ Cambridge, Ctr Sci & Policy, Cambridge CB2 3BU, England; 3.Univ Calif San Diego, San Diego Supercomp Ctr, La Jolla, CA 92093 USA |
推荐引用方式 GB/T 7714 | Kennel, Charles F.,Yulaeva, Elena. Influence of Arctic sea-ice variability on Pacific trade winds[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(6):2824-2834. |
APA | Kennel, Charles F.,&Yulaeva, Elena.(2020).Influence of Arctic sea-ice variability on Pacific trade winds.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117(6),2824-2834. |
MLA | Kennel, Charles F.,et al."Influence of Arctic sea-ice variability on Pacific trade winds".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117.6(2020):2824-2834. |
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