摘要
对45个冬季格陵兰以东区域海冰密集度场与北大西洋500hPa位势高度滤波方差作奇异值(SVD)分析,结果表明:SVD得到的第一对空间典型分布反映了冬季格陵兰以东区域海冰异常与风暴轴的异常变化密切相关。进一步的合成分析显示,海冰异常使得大气环流调整,气压梯度、天气尺度涡动热量的经向通量和垂直通量、局地斜压性均发生改变,从而对风暴轴的强度及中心的位移造成影响。
Singular value decomposition （SVD）is conducted for the sea-ice density over the ocean on the east to Greenland and 500 hPa filtered potential height variance of 45 storm track regions. The results show that the first couple of mode obtained from SVD depicts the effect of sea-ice over the ocean on the east to Greenland on the variability of storm. Furthermore, composite analysis indicates that winter sea-ice anomaly is closely associated with the general circulation which gives rise to the change of pressure gradient, meridional and vertical eddy heat flux and haroclinicity, accordingly, influence on the storm track vigor and the center migration.
出处
《气象与减灾研究》
2006年第4期6-11,共6页
Meteorology and Disaster Reduction Research
基金
国家自然科学基金重点资助项目(40331010)
江苏省气象灾害重点实验室资助项目(KLME050202)
江苏省普通高等学校"青蓝工程"中青年学术带头人资助项目.
关键词
格陵兰
海冰
异常
大西洋
风暴轴
Greenland, Sea-ice, Anomaly, Atlantic, Storm-tracks.
