Conceptual Model of Typical Atmospheric Circulation in Bohai Ice Anomaly Year
Zhou Xuwen
He Xuan
Ren Miaochun
Chang Zhikun
Abstract：Based on the Bohai ice grade from 1960 to 2013 and the 500 hPa and 1000 hPa daily data of NCEP/NCAR reanalysis from 1959 to 2014,using the method of moving average,correlation analysis and cluster analysis,the conceptual model of atmospheric circulation in Bohai ice anomaly year are studied.The results show that in severe ice year there are 3 kinds of typical circulation models (northerly airflow type,northwest airflow type,northeast airflow type),each model represents one path of cold air,which influence the Bohai.The common characteristics are positive anomaly in Eurasia high latitude areas,negative anomaly from Lake Baikal region to the northeast China,and meridional circulation in Asia middle-high latitude.In light ice year there are 3 kinds of typical circulation models (polar vortex type,European trough type,straight circulation in Eurasia type),their common features are south-high and north-low in Asia region,negative anomaly in polar,positive anomaly in middle-high latitude area,straight circulation in Asia middle-high latitude.
Keywords：abnormal sea ice conditioncluster analysisatmospheric circulationconceptual modelBohai
Publication Date：2017-10-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 109-113 )