太平洋赤道潜流起源的模式研究

A Study on a Model of Origin of Pacific Equatorial Undercurrent

基于一个高分辨率准全球海洋模式HYCOM(HYbrid Coordinate Ocean Model),研究了热带西太平洋海域赤道潜流的起源。结果表明:赤道潜流在大约130°E处开始,流核位于225 m、2°N附近,最大流速超过15 cm/s,体积输运约1.6×106 m3/s,其水源来自棉兰老海流;在东部140°E断面,赤道潜流的北部主要是由棉兰老海流提供(9.7×106 m3/s),其南部主要是来自新几内亚沿岸潜流(9.1×106 m3/s)。

A high resolution quasi-global ocean model HYCOM （HYbrid Coordinate Ocean Model） is used to investigate the origin of the Equatorial Undercurrent （EUC） in the western tropical Pacific. The results suggest that the EUC starts about 130°E, with the core at about 225 m, 2°N, the maximum of velocity over 15 cm/s, the volume transport about 1.6×10^6m^3/s, and it is from Mindanao Current （MC）. Along the section of 140°E, the northern of the EUC is mainly provided by the MC （9.7×10^6m^3/s） and the southern of the EUC is mainly from New Guinea Coast Undercurrent （9.1×10^6m^3/s）.