安徽农业科学2012，Vol.40Issue(9)：5582-5584,5717,4.
500hPa北极极涡环流指数的初步分析
Primary Analysis of the Northern Hemisphere Circumpolar Vortex Indices at 500 hPa Geopotential Height Field
唐秋艳1
作者信息
- 1. 辽宁省本溪市气象局,辽宁本溪117000
- 折叠
摘要
Abstract
The Northern Hemisphere circumpolar vortex indices (size, strength and centre position) were defined and calculated by using the NCEP/NCAR data at the 500 hpa geopotential height field from 1958 -2006 with the Northern Hemisphere polar vorticity characteristic grade. According to these results, the Artic vortex indices at the 500 hPa level on the interaseasonal and interannual variation were compared and analyzed , getting some laws about the Northern Hemisphere polar vortex variation: the size of Artic vorticity has obvious interannual variation at 500 hPa geopotential height field. From the long-term trend, we discovered that the size had displayed contraction evidently from 1958 to 2006; the size and strength had marked interaseasonal variation, moreover they existed positive relationship to a certain extent.关键词
北极极涡/特征等直线/计算/环流指数Key words
Arctic vortex/ Characteristic grade/ Calculation/ Circumpolar indices分类
农业科技引用本文复制引用
唐秋艳..500hPa北极极涡环流指数的初步分析[J].安徽农业科学,2012,40(9):5582-5584,5717,4.
