兰州大学机构库 >大气科学学院
Characteristics of Transient Eddies During Ural Blocking Events With Different Lifetime in Winter
Zhang, Jinyu1; Li, Y(李艳)2,3; Wang, Zhilan1; Zhang, Yu1; Lu, Yao2
2022-03-02
Source PublicationFRONTIERS IN EARTH SCIENCE
Volume10
AbstractUral blocking high (hereafter UB) is one of the most important weather systems influencing the weather and climate of China, with its onset and development closely connected with transient eddies. Herein, we classified the wintertime UB events during 1979-2015 into three types according to their lifetime, i.e., short, medium, and long lifetime UB events and further analyzed the characteristics of momentum and heat fluxes transported by transient eddies during the three types of UB events. The results show that the eddy momentum and heat transport by transient eddies over the Ural regions is strong, while the westerly is weak, favorable for the establishment and maintenance of the UB. Before the onset of all the UB events there are enhanced lower-level temperature disturbances, decelerated westerly and convergence of transient momentum and heat fluxes. After the onset of the UB, the upper-level jet stream is accelerated and eddy flux convergence is enhanced. Furthermore, it is found that the duration and position of convergence could be one of important factors determining the lifetime of UB event. The long-time strong convergence of transient eddies favors the maintenance of UB. During long UB events, the polar jet and the convergence of eddy momentum fluxes have the strongest intensity and northward shifted position. The convergence is further strengthened until Day +2 and weakened since Day +7, favorable for the long-time maintenance of UB. There is convergence on Day -3 of both short and medium UB events, which disappears on Day +4 during short events, while strengthened after the onset of medium events, leading to a long-time maintenance of UB. Furthermore, among the three types of UB events, the upward propagation of wave activity and E-P flux divergence are the strongest and most long-lasting during long UB events, while the weakest and shortest during short UB events, which can also verify strong atmospheric baroclinicity and long-lasting strong convergence of transient eddies are favorable for long duration of the UB.
KeywordUral blocking transient eddy transport of momentum and heat E-P flux lifetime of blocking high
PublisherFRONTIERS MEDIA SA
DOI10.3389/feart.2022.855634
Indexed BySCIE
Language英语
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000771594300001
Original Document TypeArticle
Citation statistics
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/476227
Collection大气科学学院
Affiliation1.China Meteorol Adm, Inst Arid Meterol, Lanzhou, Peoples R China;
2.Lanzhou Univ, Coll Atmospher Sci, Lanzhou, Peoples R China;
3.Lanzhou Univ, Key Lab Semiarid Climate Change, Minist Educ, Lanzhou, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Jinyu,Li, Yan,Wang, Zhilan,et al. Characteristics of Transient Eddies During Ural Blocking Events With Different Lifetime in Winter[J]. FRONTIERS IN EARTH SCIENCE,2022,10.
APA Zhang, Jinyu,Li, Yan,Wang, Zhilan,Zhang, Yu,&Lu, Yao.(2022).Characteristics of Transient Eddies During Ural Blocking Events With Different Lifetime in Winter.FRONTIERS IN EARTH SCIENCE,10.
MLA Zhang, Jinyu,et al."Characteristics of Transient Eddies During Ural Blocking Events With Different Lifetime in Winter".FRONTIERS IN EARTH SCIENCE 10(2022).
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Altmetrics Score
Google Scholar
Similar articles in Google Scholar
[Zhang, Jinyu]'s Articles
[Li, Yan]'s Articles
[Wang, Zhilan]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhang, Jinyu]'s Articles
[Li, Yan]'s Articles
[Wang, Zhilan]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhang, Jinyu]'s Articles
[Li, Yan]'s Articles
[Wang, Zhilan]'s Articles
Terms of Use
No data!
Social Bookmark/Share
No comment.
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.