北印度洋海平面风场的时空特征分析

• 作 者: 崔开付 孙即霖 薛锋
• 机 构: 中国海洋大学物理海洋实验室和海洋-大气相互作用与气候实验室,南海舰队海洋水文气象中心,92196部队,
• 出 处: 海洋湖沼通报
• 发表日期: 2013年04期
• 关键词: North Indian Ocean wind field spatial and temporal characteristics empirical ort

利用美国国家海洋大气局(NOAA)发布的NCEP/NCAR再分析全球海平面风场资料,对近53a来的北印度洋海平面风场进行矢量场的EOF分析、功率谱分析、线性趋势分析和相关分析,得出北印度洋海平面风场的时空变化特征。结果表明:(1)北印度洋海平面风场存在显著的年际变化特征,振荡周期为5-6年;(2)北印度洋海平面风场存在显著的线性变化趋势,并且在20世纪80年代前后发生了位相的转变,由偏南风距平转为偏北风距平;(3)全球气候变暖与北印度洋海平面风场的变化密切相关,随着全球变暖,北印度洋海平面风场的偏南风距平减弱,偏北风距平加强。

Based on the NCEP / NCAR reanalysis global sea level wind data released by the NOAA, the EOF, vector power spectrum analysis, linear trend analysis and correlation of the vector fields of the North Indian Ocean wind field over the past 53 years After analyzing, the spatio-temporal variation of the sea level wind field over the North Indian Ocean is obtained. The results show that: (1) there is a significant interannual variation of the sea level over the North Indian Ocean with an oscillation period of 5-6 years; (2) there is a significant linear trend in the sea level over the North Indian Ocean; and in the 1980s (3) Global warming is closely related to the change of the sea level wind field over the North Indian Ocean. As the global warming, the North Indian Ocean sea level The wind southerly anomalies weakened, increasing the intensity of the northerly winds.