LI Linlin,NAN Sulan,ZHAO Ping,et al.The Meridional Circulation Associated with South Asian High over Eurasia and Indian Ocean[J].Journal of Chengdu University of Information Technology,2021,36(02):185-189.[doi:10.16836/j.cnki.jcuit.2021.02.010]
与南亚高压相联的欧亚大陆-印度洋经向环流
- Title:
- The Meridional Circulation Associated with South Asian High over Eurasia and Indian Ocean
- 文章编号:
- 2096-1618(2021)02-0185-05
- Keywords:
- meteorology; Tibetan Plateau climatology; South Asian high; Tibetan Plateau; symmetrical structure; meridional circulation; Eurasia-low and middle latitudes of the southern Indian Ocean
- 分类号:
- P466
- 文献标志码:
- A
- 摘要:
- 目前南亚高压与全球大气环流和气候的联系主要集中于北半球,很少研究与南半球气候系统之间的联系。因此主要应用相关、合成方法,利用1979-2014年ERA-Interim逐月再分析资料,选取南亚高压中心区域平均的位势高度来指示南亚高压强度,探讨对流层中高层欧亚大陆与南半球印度洋中、低纬地区大气环流特征及其成因。结果表明,在年际尺度上,该区域在高度场和温度场上呈现以热带为轴的对称结构,这与南亚高压密切相关,并且与异常的纬向-垂直环流密切相关。该环流圈减弱了北半球欧亚大陆区域Hadley环流的下沉支,加强了南半球印度洋区域Hadley环流的下沉支。因此,该环流圈可能是南北半球相互作用的一个重要“通道”,可以在欧亚大陆与南印度洋地区热量、能量等传输过程中起着重要作用。
- Abstract:
- At present, the connection between the South Asia High(SAH)and global atmospheric circulation and climate is mainly concentrated in the Northern hemisphere.However,there are few studies on the relationship between the SAH and the southern hemisphere climate system.Therefore, relevant and synthesis methods are mainly used.Then employing monthly reanalysis data from 1979-2014 ERA-Interim,and selecting average geopotential height of SAH center area to represent the high pressure intensity of South Asia High,meanwhile, discussing the atmospheric circulation characteristics in Eurasia located in the middle and upper troposphere and in the middle and low latitude area in the south hemisphere.The results show that,on the interannual scale,this area shows a symmetrical structure with tropics as axis,which is closely related to the South Asian High and anomalous zonal vertical circulation in the region.The circulation weakens the sinking branch of the Hadley circulation in the Eurasian region of the northern hemisphere and strengthens the sinking branch of the Hadley circulation in the Indian Ocean region of the southern hemisphere.This circulation may be an important “channel” for the interaction between the northern and southern hemispheres,and plays an important role in the heat and energy transfer process between Eurasia and southern Indian ocean.
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备注/Memo
收稿日期:2020-04-23
基金项目:中科院先导专项资助项目(XDA20100300); 国家自然科学基金资助项目(41775084); 气科院基本科研业务资助项目(2019Z008)