摘要
选取渤海冰情等级资料和大气环流74个指数逐月资料,分别建立不同尺度(年、半年、季和月)的累积值变量作为因子,研究该地区冰情年代际变化及冰情的气候成因,结果发现以1972年为分界把1932~2000年时期冰情的变化分为两个时段,前一时段为重冰情多发阶段,1972年以后转为轻冰情时段.影响渤海海冰冰情变化主要因子是太平洋副高.
Based on the data of sea ice grade in the Bohai Sea of China and the 74 factors of atmospheric circulation,the variation of sea ice conditions in decadal scale is studied by using the factors of atmospheric circulation in different time scale (year,half-year,season and month). The result shows that two period of sea ice conditions:the severe period (1932~1972) and the mild period (1973~2000) may be divided into by 1972 from 1932 to 2000 in the decadal variation,the most significant factor of atmospheric circulation influencing the sea ice conditions in the Bohai Sea is the subtropical high in the Pacific.
出处
《海洋学报》
CAS
CSCD
北大核心
2004年第2期11-19,共9页
基金
国家自然科学基金项目(49976007
40233032)
国家十五科技攻关项目(2001BA603B-03)
海洋灾害发生机理及与预报减灾技术研究(2001CB711006)
南大洋海冰变化及其对全球和中国气候影响的研究(2001DIA50040-03).
关键词
海冰
气候变异
渤海
大气环流
太平洋副高
信噪比分析
突变分析
decadal variation of sea ice
factors of atmospheric circulation
signal-noise ratio analysis
jump analysis in decadal variation