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Inversion of the Western Pacific Subtropical High Dynamic Model and Analysis of Dynamic Characteristics for Its Abnormality : Volume 20, Issue 1 (18/02/2013)

By Hong, M.

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Book Id: WPLBN0003988180
Format Type: PDF Article :
File Size: Pages 12
Reproduction Date: 2015

Title: Inversion of the Western Pacific Subtropical High Dynamic Model and Analysis of Dynamic Characteristics for Its Abnormality : Volume 20, Issue 1 (18/02/2013)  
Author: Hong, M.
Volume: Vol. 20, Issue 1
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Ge, J. J., Liu, K. F., Hong, M., Li, J. X., & Zhang, R. (2013). Inversion of the Western Pacific Subtropical High Dynamic Model and Analysis of Dynamic Characteristics for Its Abnormality : Volume 20, Issue 1 (18/02/2013). Retrieved from

Description: Key Laboratory of Ocean Environment, Institute of Meteorology and Oceanography, PLA University of Science and Technology, Nanjing, China. Based on time series data of 500 hPa potential field from NCEP/NCAR (National Center for Environmental Forecast of American/National Center for Atmospheric Research), a novel consideration of empirical orthogonal function (EOF) time–space separation and dynamic system reconstruction for time series is introduced. This method consists of two parts: first, the dynamical model inversion and model parameter optimization are carried out on the EOF time coefficient series using the genetic algorithm (GA), and, second, a nonlinear dynamic model representing the subtropical high (SH) activity and its abnormality is established. The SH activity and its abnormal mechanism is studied using the developed dynamical model. Results show that the configuration and diversification of the SH equilibriums have good correspondence with the actual short–medium term abnormal activity of the SH. Change of SH potential field brought by the combination of equilibriums is more complex than that by mutation, and their exhibition patterns are different. The mutation behavior from high-value to low-value equilibriums of the SH in summer corresponds with the southward drop of the SH in the observed weather process. The combination behavior of the two steady equilibriums corresponds with disappearance of the double-ridge phenomenon of the SH. Dynamical mechanisms of these phenomena are explained.

Inversion of the western Pacific subtropical high dynamic model and analysis of dynamic characteristics for its abnormality

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