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The Role of Rossby-Wave Propagation in a North American Extreme Cold Event
Joint Authors
Shi, Chunhua
Xu, Ting
Li, Hui
Gao, Yannan
Source
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-08-17
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
The Eliassen–Palm flux and Plumb wave activity flux are calculated using the European Centre for Medium-Range Weather Forecasts interim reanalysis daily dataset to determine the propagation of Rossby waves before a North American cold wave in January 2014.
The results show that the upward wave activity fluxes mainly come from planetary waves 1 and 2, which provide a stable circulation background for the influence of the subplanetary-scale waves 3 and 4.
The Rossby-wave propagation anomalies between the troposphere and the stratosphere are due to the modulating effects of waves 3 and 4 on waves 1 and 2.
During 9–14 January 2014, the modulating effects helped strengthen upward and eastward wave activity fluxes over the Atlantic region and enhance the Pacific high in the stratosphere in its early stage.
Later in 19–24 January, the downward wave activity fluxes over the east Pacific due to the modulating effects were beneficial to downward development of the stratospheric high over the Pacific and the formation of a blocking high over the west coast of North America in the troposphere accompanied by a strong adjacent cold low on the east side.
These circulations benefit the southward invasion of polar cold air reaching the lower latitudes of east North America, leading to the cold wave outbreak.
American Psychological Association (APA)
Shi, Chunhua& Xu, Ting& Li, Hui& Gao, Yannan. 2017. The Role of Rossby-Wave Propagation in a North American Extreme Cold Event. Advances in Meteorology،Vol. 2017, no. 2017, pp.1-10.
https://search.emarefa.net/detail/BIM-1122675
Modern Language Association (MLA)
Shi, Chunhua…[et al.]. The Role of Rossby-Wave Propagation in a North American Extreme Cold Event. Advances in Meteorology No. 2017 (2017), pp.1-10.
https://search.emarefa.net/detail/BIM-1122675
American Medical Association (AMA)
Shi, Chunhua& Xu, Ting& Li, Hui& Gao, Yannan. The Role of Rossby-Wave Propagation in a North American Extreme Cold Event. Advances in Meteorology. 2017. Vol. 2017, no. 2017, pp.1-10.
https://search.emarefa.net/detail/BIM-1122675
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1122675