Decadal relationship between the North Atlantic Oscillation and cold surge frequency in Taiwan.

University of Taipei > 理學院 > 地球環境暨生物資源學系(含環境教育與資源碩士班) > 期刊論文 > Item 987654321/11113

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://utaipeir.lib.utaipei.edu.tw/dspace/handle/987654321/11113

题名:	Decadal relationship between the North Atlantic Oscillation and cold surge frequency in Taiwan.
作者:	洪志誠;Chi-Cherng Hong;Huang-Hsiung Hsu;Hsin-Hsing Chia;Cheng-Ying Wu
贡献者:	地球環境暨生物資源學系(含環境教育與資源碩士班)
关键词:	decadal;NAO;cold surge
日期:	2008-12
上传时间:	2014-01-17 19:30:40 (UTC+8)
摘要:	The close decadal relationship between the North Atlantic Oscillation (NAO) and the cold surge frequency in Northern Taiwan is identified. The cold surge frequency was higher (lower) in 1957–1977 (1981–2001), which corresponded to the negative (positive) phase of the NAO. The teleconnection pattern associated with the NAO suggests that the Siberian high, the ridge upstream of Lake Baikal and the East Asian trough, which are well-known circulation characteristics favorable for cold surge occurrences, were enhanced in the negative NAO phase. A weakened upper-level convergence over the Mediterranean-Sahara occurring in the negative NAO phase was associated with a wave-like pattern spreading toward East Asia along the subtropical jet stream. Barotropic modeling results suggest that the suppressed upper-level convergence in the Mediterranean-Sahara region may force a wave train emanating toward East Asia along the subtropical jet stream, which acts as a Rossby waveguide. The barotropic wave pattern may result in a stronger low-level northerly over subtropical East Asia and create a favorable background for the further southward penetration of cold air, and therefore more frequent cold surge occurrence. The same process may be applied to the period when the NAO is in the positive phase.
關聯:	Geophysical Research Letters，Vol. 35, Issue 24，Pages L24707
显示于类别:	[地球環境暨生物資源學系(含環境教育與資源碩士班)] 期刊論文

文件中的档案:

没有与此文件相关的档案.

在uTaipei中所有的数据项都受到原著作权保护.

数据加载中.....