摘要
根据1973年至2016年黄海沿岸风、平均海平面气压与气温观测资料,采用旋转经验正交函数(REOF)、调和分析和延迟相关分析等方法,研究了黄海月平均风应力、风速、平均海平面气压、气温场季节与年际变化时空模态.月平均风应力、风速场主要有4种时空模态,风应力模态空间分量分布与风速模态不完全相同,风应力、风速模态季节周期分量多数为不稳定,风应力、风速场强度年际变化显著线性减弱,对黄海环流以及物理、化学要素场季节与年际变化有显著影响.月平均气压、气温场季节循环与年际变化主要有2种时空模态,气压、气温模态季节周期分量的位相均为准稳定季节变化;振幅为不稳定季节变化.气压模态为准平衡态年际变化,大尺度气压系统季节与年际变化是黄海气压场模态的主要影响因素.气温模态为显著线性升温趋势年际变化,海气、陆气热交换作用对黄海气温场模态季节与年际变化有显著影响.
Based on the wind,mean sea level pressure and air temperature data obtained along the Yellow Sea coast from 1973 to 2016,the spatio-temporal mode on the seasonal and interannual variability of mean monthly wind stress,wind speed,pressure and air temperature field in the Yellow Sea were studied with the methods of Rotated Empirical Orthogonal Function( REOF),harmonic analysis and the delay correlation analysis. The results show that the seasonal and interannual variability of wind stress and wind speed field can be basically divided into four spatio-temporal modes. The spatial distribution of wind stress mode is not the same as that of wind speed mode.The seasonal period components of wind stress and wind speed mode are generally unstable. The interannual variation of wind stress and wind speed field mode intensity decreases linearly,which has a significant effect on the seasonal and interannual circulations and the physical and chemical element fields in the Yellow Sea. The seasonal and interannual variability of pressure and air temperature field can be divided into two spatio-temporal modes. The phases of seasonal periodic components of pressure and air temperature mode are all quasi-stable seasonal variability and the amplitudes are unstable in seasonal variability. The interannual variation of pressure mode is in a quasi-equilibrium state. The seasonal and interannual variability of the large-scale atmospheric pressure system is an important influencing factor on the pressure field mode of the Yellow Sea. The interannual variation of air temperature mode shows a trend of significant linear warming. Air-sea and land-air heat exchange effect has a significant influence on the mode of seasonal and interannual variation in air temperature field.
出处
《应用海洋学学报》
CSCD
北大核心
2017年第4期487-499,共13页
Journal of Applied Oceanography
基金
海洋溢油鉴别与损害评估技术国家海洋局重点实验室资助项目(2015010)
关键词
海洋气象学
风应力场
风速场
气压场
气温场
时空模态
REOF分析
黄海
marine meteorology
wind stress field
wind speed field
pressure field
air temperature field
spatiotemporal mode
REOF analysis
Yellow Sea
