首页 | 本学科首页   官方微博 | 高级检索  
     检索      

2021年夏季海洋天气评述
引用本文:王皘,刘达,董林,魏娜.2021年夏季海洋天气评述[J].山东气象,2021,41(4):82-94.
作者姓名:王皘  刘达  董林  魏娜
作者单位:(1.国家气象中心,北京 100081;2.中国气象科学研究院,北京 100081)
基金项目:国家重点研发计划项目(2018YFC1506400);国家自然科学基金项目(42175007)
摘    要:2021年夏季(6—8月)大气环流特征为:北半球极涡呈单极型分布,主体位于北冰洋上空偏向西半球,强度较常年偏强;东亚地区以纬向环流为主,副热带高压较常年平均略偏西偏南。6月,北部海域温度较低,黄渤海海雾天气多发。7月,西南季风推进,热带气旋活跃。8月,副热带高压增强西伸,热带气旋活动频次偏少。夏季共有7次海雾过程,其中6月有4次,7月有3次。我国近海出现了9次8级以上大风过程,其中热带气旋大风过程6次,温带气旋入海影响的大风过程3次。浪高在2 m以上的海浪过程有10次,2 m以上大浪的天数共计38 d。我国北部及东部海域升温明显,从北到南的海面温度梯度减小。西北太平洋和南海有9个台风活动,其中台风“烟花”造成近海一次范围广、时间长、风力大的大风过程。

关 键 词:大气环流  大风  海雾  热带气旋  台风“烟花”

Summer 2021 marine weather review
WANG Qian,LIU D,DONG Lin,WEI Na.Summer 2021 marine weather review[J].Journal of Shandong Meteorology,2021,41(4):82-94.
Authors:WANG Qian  LIU D  DONG Lin  WEI Na
Institution:(1.National Meteorological Center, Beijing 100081, China; 2.Chinese Academy of Meteorological Science, Beijing 100081, China)
Abstract:The main characteristics of the general atmospheric circulation in summer 2021 (from June to August) are as follows. The polar vortex is characterized by a monopole pattern in the Northern Hemisphere, centers in the Arctic Circle toward the Western Hemisphere, and is stronger than average. East Asia is dominated by zonal circulation, and the subtropical high lies slightly more westward and southward than average. In June, the temperature in the northern sea area is low, leading to frequent sea fog processes over Bohai Sea and Yellow Sea. In July, the southwest monsoon advances and tropical cyclones are active. In August, the subtropical high strengthens and extends to the west, resulting in less tropical cyclone activity. There are seven sea fog processes over offshore areas in summer, including four in June and three in July. There are nine gale processes above 8-grade over offshore areas of China, among which six are related to tropical cyclones and three are influenced by extratropical cyclones entering the sea. There are 10 rough sea wave processes above two meters, and the total number of days is 38 d. The sea surface temperature increase profoundly in the northern and eastern seas of China, which reduces the sea surface temperature north-south gradient. There have been 9 typhoons over the western North Pacific and the South China Sea, among which Typhoon In-fa causes a large-scope, long-lasting, and intense gale process over the offshore.
Keywords:atmospheric circulation  gale  sea fog  tropical cyclones  Typhoon In-fa
点击此处可从《山东气象》浏览原始摘要信息
点击此处可从《山东气象》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号