Spatiotemporal climatology of the Arabian Subtropical Anticyclone

IF 1.1 4区地球科学 Q4 ENVIRONMENTAL SCIENCES

Physical Geography Pub Date : 2022-09-03 DOI:10.1080/02723646.2022.2080902

A. Alghamdi, J. Harrington

{"title":"Spatiotemporal climatology of the Arabian Subtropical Anticyclone","authors":"A. Alghamdi, J. Harrington","doi":"10.1080/02723646.2022.2080902","DOIUrl":null,"url":null,"abstract":"ABSTRACT The Arabian Subtropical Anticyclone (ASA) plays an essential role in regulating weather systems over the Arabian Peninsula (Arabia) and adjacent areas. A need exists to document specific details of the spatial and temporal climatology of the ASA. In order to identify the monthly ASA position/center, the local maximum geopotential height (gph) should be located at different vertical levels. The common automated method did not work for the ASA in the warm season and an approach involving wind flow patterns was needed. The ASA was better defined in the lower troposphere in the cool season and in the mid- to upper-troposphere during the warm season. The near surface ASA begins in Aug over northern Arabia and migrates southeast until it reaches the Arabian Sea in Feb. Apr is the onset of the middle-troposphere ASA. From May to Aug, this anticyclone moves to the north with increasing height. The upper-level ASA is located over northeast Arabia in May and goes north in Jun and Jul. Seasonal changes in energy fluxes and atmospheric circulation patterns linked with the Asian Monsoon are identified as possible drivers of the temporal changes in the ASA.","PeriodicalId":54618,"journal":{"name":"Physical Geography","volume":null,"pages":null},"PeriodicalIF":1.1000,"publicationDate":"2022-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physical Geography","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1080/02723646.2022.2080902","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}

引用次数: 2

Abstract

ABSTRACT The Arabian Subtropical Anticyclone (ASA) plays an essential role in regulating weather systems over the Arabian Peninsula (Arabia) and adjacent areas. A need exists to document specific details of the spatial and temporal climatology of the ASA. In order to identify the monthly ASA position/center, the local maximum geopotential height (gph) should be located at different vertical levels. The common automated method did not work for the ASA in the warm season and an approach involving wind flow patterns was needed. The ASA was better defined in the lower troposphere in the cool season and in the mid- to upper-troposphere during the warm season. The near surface ASA begins in Aug over northern Arabia and migrates southeast until it reaches the Arabian Sea in Feb. Apr is the onset of the middle-troposphere ASA. From May to Aug, this anticyclone moves to the north with increasing height. The upper-level ASA is located over northeast Arabia in May and goes north in Jun and Jul. Seasonal changes in energy fluxes and atmospheric circulation patterns linked with the Asian Monsoon are identified as possible drivers of the temporal changes in the ASA.

查看原文本刊更多论文

阿拉伯副热带反气旋的时空气候学

摘要阿拉伯副热带反气旋（ASA）在调节阿拉伯半岛及其邻近地区的天气系统方面发挥着重要作用。需要记录ASA的空间和时间气候学的具体细节。为了确定每月ASA的位置/中心，当地最大位势高度（gph）应位于不同的垂直水平。常见的自动化方法在温暖季节不适用于ASA，需要一种涉及气流模式的方法。ASA在凉爽季节更好地定义在对流层下部，而在温暖季节则在对流层中上部。近地表ASA于8月在阿拉伯北部上空开始，并向东南移动，直到2月抵达阿拉伯海。4月是对流层中期ASA的开始。从5月到8月，这股反气旋向北移动，高度不断增加。高层ASA于5月位于阿拉伯东北部，并于6月和7月向北移动。与亚洲季风有关的能量通量和大气环流模式的季节性变化被认为是ASA时间变化的可能驱动因素。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Physical Geography 地学-地球科学综合

CiteScore

3.60

自引率

0.00%

发文量

审稿时长

6 months

期刊介绍： Physical Geography disseminates significant research in the environmental sciences, including research that integrates environmental processes and human activities. It publishes original papers devoted to research in climatology, geomorphology, hydrology, biogeography, soil science, human-environment interactions, and research methods in physical geography, and welcomes original contributions on topics at the intersection of two or more of these categories.