摘要
用海气界面净热量收支和1950－1979年表层水温资料，计算了冬季北太平洋西部上层海洋热通量散度场，指出冬季北太平洋西部黑潮将大量低纬暖水输送到中高纬度海域，在30－35°N最大；亲潮将极地冷水沿千岛群岛向南输送，在45－50°N最大；两者在40°N附近相遇，混合减弱后沿纬向东传。同时用EOF分析方法对热通量散度距平场分型，前3个主要型分别为：黑潮亲潮偶合型、北太平洋海流型和冷平流优势型。最后还揭示了第一主要型与北太平洋副热带高压之间有意义的相关关系。
Based on the net heat flux at the air-sea interface and the sea surface temperature data sets, for the region 20-60°N of the North Pacific, for period 1950-1979, the average and interannual oceanic heat flux divergence in winter (February)were calculated, and their dominant patterns were analyzed by EOF method. Themain results were as follows.1. In the northwestern Pacific in winter, the Kuroshio Warm Current brings a huge amount of heat from lower latitude to mid-and high-latitude area (with the maximum in the 30-35°N latitude belt), the Oyashio cold current brings cold water from high latitude to middle latitude area (with the maximum in the 45-5O°N latitude belt). They meet and mix and weaken near 40°N, then are transported eastward by the North Pacific Ocean Current.2. The first three dominant patterns of the oceanic heat flux divergence anomaly in the upper ocean of the northwestern Pacific in winter are: The Kuroshio-Oyashio couple pattern (the lst component, 26% contribution) with 3.5 years period,the North Pacific Ocean Current pattern (the 2nd component, 16% contribution) with 3.5 years period too, the cold current dominant pattern (3rd component,11% contribution) with long terms period.In the end of this paper, the close relationship between the time coefficients of the lst component in February and the index of the Western Pacific Subtropical High in May was shown, which suggest that the oceanic heat flux of the western boundary current of the North Pacific has some important effects on the climate.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
1994年第1期9-14,共6页
Oceanologia Et Limnologia Sinica
基金
中国科学院重大项目!Ky85-10
