西北太平洋137°E断面温度场和盐度场的时空特征

Spatial and temporal variations of temperature and salinity field along 137°E section in northwestern Pacific Ocean

本文利用日本气象厅在137°E断面获得的水温和盐度长期观测资料,分析了该断面温度场和盐度场的时空特征.结果表明,137°E断面的温度场和盐度场都存在着明显的季节差异和年际变化.冬季,温度场变化的关键区位于3°～18°N的300m以浅海域,而盐度场变化的关键区则位于18°～34°N的300m以浅海域.夏季,温度场变化的关键区位于3°～16°N的300m以浅海域,而盐度场则有两个关键区,分别位于3°～18°N的200m以浅海域和24°～34°N的300m以浅海域.温度场的年际变化与ENSO循环相联系,而盐度场的年际变化则比较复杂.

Based on temperature and salinity data obtained in the northwestern Pacific Ocean,the spatial and temporal variations of temperature and salinity field along 137°E（3°～34°N） were stu-died by using empirical orthogonal function（EOF）.The results showed that temperature and salinity fields all had striking seasonal difference and interannual variation.In winter,the key area of temperature field variation is located at 0～300m in 3°～18°N while that of salinity field variation at 0～300m in 18°～34°N.In summer,the key area of temperature field variation is located at 0～300m in 3°～16°N with two key areas of the other at 0～300m in 24°～34°N.The interannual variation of temperature field is associated with ENSO while the variation of salinity field is complicated.