黄、渤海海冰长期变化特征分析-海洋预报

黄、渤海海冰长期变化特征分析

单位：1. 北京大学大气科学系北京 100871;
2. 国家海洋环境预报中心北京 100081

分类号：P731

出版年·卷·期（页码）：2005·2005·第二期（22-32）

摘要：

选取渤海、黄海北部冰情等级、冰面积资料和大气环流逐月资料,采用小波分析和交叉小波分析方法,研究海冰长期变化特征及其气候成因。结果发现黄、渤海海冰具有多尺度变化特征,存在低频变化、高频变化和无明显周期的演变过程。西太平洋副高、亚洲极涡以及纬向环流是影响海冰生成与变化的直接因素。黄、渤海海冰还与印度洋副高、北美副高,以及大西洋副高存在显著年代际相关关系。

Based on the sea ice grade, sea ice area and monthly atmospheric circulation index time series, wavelet and cross-wavelet methods are employed to investigate the long-term variation characteristics and climatic mechanism of sea ice in the Bohai Sea and the North Huanghai Sea. The results show that sea ice variaition contains multi-scale variations. There are low-frequency variation,high-frequentcy variation and non-periodical evolution patterns in the past 50 years. The atmospheric circulation in the Asia region, such as the subtropical high in the northwest Pacific, the Asia polar pow and the zonal circulation, is the most direct factors affecting on sea ice formation and evolution. Furthermore there are notable correlation, on interdecadal scales, between sea ice and climate factors including the Indian Ocean high, the Atlantic Ocean high and the North American high.

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