| Relationship of Arctic sea ice and Northern Hemispheric 500 hPa Polar vortices |
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| 作者姓名： | References： |
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| 作者单位： | Department of Atmospheric Sciences NUIST，Department of Atmospheric Sciences，NUIST，Nanjing 210044，China，Nanjing 210044，China |
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| 摘 要： | Using the NCEP/NCAR reanalysis monthly 500 hPa height data on a 2.5 latitude-longitude grid and 1°×1° sea ice data,the polar vortex area,intensity index and arctic sea ice area index are calculated respectively,and the meridional distribution,period variation and the abrupts in the long range trend are analyzed to study their relationship.The results show that the meridional distribution of sea ice and polar vortex h-ave distinctive difference,the relative positions of them are different in the eastern and western hemispheres,and exept they have periods of 4 months,quasi half year,quasi year,4-5 years and 10 years commonly,and each of them has its own respective variation as well.The sea ice area is decreasing apparently since 1980's,so is the polar vortex area,but their abrupt changge time are different totally.The area of sea ice and polar vortex has prominent positive correlation,but the relationship of sea ice intensity,polar vortex intensity,polar vortex area is complicated.
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Relationship of Arctic sea ice and Northern Hemispheric 500 hPa Polar vortices |
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| Jia Jianying,Sun Zhaobo.Relationship of Arctic sea ice and Northern Hemispheric 500 hPa Polar vortices[J].Chinese Journal of Polar Science,2007,18(1):73-83. |
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| Authors: | Jia Jianying Sun Zhaobo |
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| Abstract: | Using the NCEP/NCAR reanalysis monthly 500 hPa height data on a 2.5 latitude-longitude grid and 1°×1° sea ice data, the polar vortex area, intensity index and arctic sea ice area index are calculated respectively, and the meridional distribution, period variation and the abrupts in the long range trend are analyzed to study their relationship. The results show that the meridional distribution of sea ice and polar vortex h-ave distinctive difference, the relative positions of them are different in the eastern and western hemispheres, and exept they have periods of 4 months, quasi half year, quasi year, 4-5 years and 10 years commonly, and each of them has its own respective variation as well. The sea ice area is decreasing apparently since 1980's, so is the polar vortex area, but their abrupt changge time are different totally. The area of sea ice and polar vortex has prominent positive correlation, but the relationship of sea ice intensity, polar vortex intensity, polar vortex area is complicated. |
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| Keywords: | Arctic sea ice polar vortex period abrupt correlation vortices Polar Northern Arctic sea ice complicated positive correlation time decreasing half year periods relative different western results show difference variation range |
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