北太平洋海洋异常加热主要型及其与海面水温的关系

THE DOMINANT PATTERNS OF THE MARINE ANOMALY HEATING OF NORTH PACIFIC AND THEIR RELATIONS TO SEA SURFACE TEMPERATURE

本文用经验正交函数(EOF)对北太平洋海面加热场进行了分型,讨论了第一和第二特征向量场的时空分布特征,并分析了与北太平洋海温场的关系。结果指出,冬季第一特征向量场以北太平洋中西部和东部的特征值反号为主要特征,夏季则以全区的特征值同号为基本特色。同时指出,在北赤道流和北太平洋海流区,海温的变化对海面加热场主要型有重要影响,尤其在夏、秋季节;在其它海域,无论是冬季还是夏季,两者均无明显的联系。

The EOF method was used to analyze the patterns of the marine anomaly heating of North Pacific and the relationships between the first two patterns of the marine anomaly heating and the sea surface temperature (SST) of North Pacific. The results show that there are different patterns of the marine anomaly heating for four seasons, i.e., in the wintertime, the main feature of the first component is a contrast between the west-central part and the east part of North Pacific; in the summertime, the main feature is the same signs in whole basin with the maximum along the axis of the North Pacific Subtropicat High. The results also show that the SST has important contribution to the air-sea interaction in some main ocean current regions, but not in the weak current area. The effects of the SST on the marine anomaly heating in main currents, i.e., the North Pacific ocean current and the North Equatorial current regions, are rather strong in summer and weak in winter.