Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-17-0215.1 |
Synoptic-Dynamic Climatology of the Aleutian High | |
Colucci, Stephen J.; Ehrmann, Thomas S. | |
2018-04-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2018 |
卷号 | 75期号:4页码:1271-1283 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | A climatology of the anticyclone that commonly appears over the Aleutian Islands in the wintertime Northern Hemisphere stratosphere is presented. Applying a geometric moments technique to a reanalysis dataset and updating a previously published definition, 68 Aleutian high (AH) events have been identified during 35 winter (October-March) seasons (1979/80-2013/14), or about 2 events per season. The events lasted an average of approximately 33 days. Thirteen of the 68 AH events each temporally and spatially coincided with tropospheric blocking identified with a wave-breaking definition, while 41 of the AH onsets each coincided with a persistently positive geopotential height anomaly in the troposphere. Also, 41 of the 68 AH events each coincided with or were followed by an objectively defined disturbance (split or displacement) to the stratospheric polar vortex. Finally, 47 of these disturbance events were each preceded by an AH onset, such that in almost all winters (33 out of 35), an early season AH was followed by a later-season polar vortex disturbance (PVD). Potential vorticity (PV) inversion revealed that the geopotential height rises associated with composite AH onset were forced primarily by anticyclonic PV increases in the stratosphere, with the troposphere providing a lesser contribution. Poleward eddy heat fluxes in the stratosphere preceded and especially followed composite AH onset, consistent with the findings that composite AH onset was forced primarily by anticyclonic PV increases in the stratosphere and that many AH onsets were each followed by a PVD onset. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000430749000015 |
WOS关键词 | LOWER STRATOSPHERIC TEMPERATURE ; TOTAL OZONE ; CIRCULATION ; WINDS ; ANTICYCLONES ; CYCLOGENESIS ; SIMULATIONS ; DIAGNOSTICS ; WINTERTIME ; AIRCRAFT |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/29223 |
专题 | 地球科学 |
作者单位 | Cornell Univ, Dept Earth & Atmospher Sci, Ithaca, NY 14850 USA |
推荐引用方式 GB/T 7714 | Colucci, Stephen J.,Ehrmann, Thomas S.. Synoptic-Dynamic Climatology of the Aleutian High[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2018,75(4):1271-1283. |
APA | Colucci, Stephen J.,&Ehrmann, Thomas S..(2018).Synoptic-Dynamic Climatology of the Aleutian High.JOURNAL OF THE ATMOSPHERIC SCIENCES,75(4),1271-1283. |
MLA | Colucci, Stephen J.,et al."Synoptic-Dynamic Climatology of the Aleutian High".JOURNAL OF THE ATMOSPHERIC SCIENCES 75.4(2018):1271-1283. |
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