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Impact of the Preceding Boreal Winter Southern Annular Mode on the Summertime Somali Jet
  • ISSN号:1674-2834
  • 期刊名称:Atmospheric and Oceanic Science Letters
  • 时间:2014.11.16
  • 页码:534-539
  • 分类:P434[天文地球—大气科学及气象学] P9[天文地球—自然地理学]
  • 作者机构:[1]Department of Atmospheric Science, Nanjing University of Information Science & Technology, Nanjing 210044, China, [2]China Metrological Administration Training Center, Beijing 100081, China, [3]Institute of Atmosphere Physics, Chinese Academy of Sciences, Beijing 100029, China
  • 相关基金:Acknowledgments. This study was jointly supported by the National Natural Science Foundation of China (41175051 and 41101045) and Plans to Graduate Research and Innovation Projects of Jiangsu Province Colleges and Universities (CXZZ13_0517).
  • 相关项目:索马里急流的变化特征及其对亚洲季风和气候的影响
中文摘要:

在南部的半球的主要高纬度的发行量系统之一是南部的环形的模式(SAM ) 。它索马里人喷气(SMJ ) 上的效果,连接南部、北的半球,不能被忽略。现在的报导结果在前面的冬季和夏日索马里人喷气紧张索引(SMJI ) 期间显示出南部的环形的模式索引(SAMI ) 的那个时间系列显示一个重要增加趋势并且有类似的 interdecadal 变化。后者在 1960 附近是相当强壮的,然后变得更弱直到 mid-1980s,在开始再加强前。有下列夏日 SMJI 的每月吝啬的 SAMI 的带落后关联在 11 月, 12 月,和 1 月显示出重要积极关联。因此越过在 SAM 和 SMJ 之间的二个季节有连接。夏天 SMJ 上的冬季 SAM 的影响在南部的印度洋经由 SST 异例的分析被探索。在期间强壮(弱) SAM/SMJ 年,马达加斯加的 SST 东方更冷(更温暖) 当澳大利亚的 SST 西方更温暖时(更冷) ,相应于积极(否定) 南部的印度洋像偶极子(SIODL ) 事件。随后, SIODL 使通过到夏天的从冬季的由空至海的联合在阿拉伯的海上位于夏天的反气旋激动,它在夏天 SMJ 紧张引起增加。在南部的半球画热带上的 SAM 和在马达加斯加玩的东方海岸上的 cyclone/low 的反气旋 / 高度分支在到夏天的从冬季的南部的印度洋桥牌的形成的一个重要角色。

英文摘要:

One of the major high-latitude circulation systems in the Southern Hemisphere is the Southern Annular Mode(SAM). Its effect on the Somali Jet(SMJ), which connects the Southern and Northern hemispheres, cannot be ignored. The present reported results show that time series of both the Southern Annular Mode Index(SAMI) during the preceding winter and the summertime Somali Jet intensity Index(SMJI) display a significant increasing trend and have similar interdecadal variation. The latter was rather strong around 1960, then became weaker up to the mid-1980 s, before starting to strengthen again. The lead-lag correlations of monthly mean SAMI with the following summertime SMJI showed significant positive correlations in November, December, and January. There are thus connections across two seasons between the SAM and the SMJ. The influence of the winter SAM on the summer SMJ was explored via analyses of SST anomalies in the Southern Indian Ocean. During strong(weak) SAM/SMJ years, the SST east of Madagascar is colder(warmer) while the SST west of Australia is warmer(colder), corresponding to the positive(negative) Southern Indian Ocean Dipole-like(SIODL) event. Subsequently, the SIODL excites an anticyclone located over the Arabian Sea in summer through air-sea coupling from winter to summer, which causes an increase in the summer SMJ intensity. The anticyclone/high branch of the SAM over the Southern Hemisphere subtropics and the cyclone/low over the east coast of Madagascar play an important role in the formation of Southern Indian Ocean "bridge" from winter to summer.

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期刊信息
  • 《大气和海洋科学快报:英文版》
  • 主管单位:中国科学院
  • 主办单位:中国科学院大气物理研究所
  • 主编:
  • 地址:北京市朝阳区华严里40号中科院大气所
  • 邮编:100029
  • 邮箱:aosl@mail.iap.ac.cn
  • 电话:010-80995273 80995203
  • 国际标准刊号:ISSN:1674-2834
  • 国内统一刊号:ISSN:11-5693/P
  • 邮发代号:2-429
  • 获奖情况:
  • 2014年 获《2014中国国际影响力优秀学术期刊》2...
  • 国内外数据库收录:
  • 被引量:53