摘要
利用美国国家环境预测中心（NCEP）和联合环境数据分析中心（JEDAC）资料，分别定义了表征海洋和大气变异的风场涡度指数和温度场指数，对热带太平洋海域的极值曲面上的温度距平、850hPa风应力旋度进行了分析．结果显示，大气对海洋热力强迫的响应主要是Gill型，而大气又可以通过风应力旋度造成的Ekman抽吸作用来影响海洋，这种海气相互作用影响着ENSO循环的发展．通过简单的统计分析，解释了二者在ENSO循环之中所起的作用，并从资料中验证了E1 Nino事件具有3—4年的循环周期．这在一定程度上支持了ENSO的时滞振荡子和自然振荡子理论．
We define the indexes of atmosphere wind stress vorticity and the sea temperature by means of the data from National Centers for Environmental Prediction（NCEP）and Joint Environmental Data Analysis Center （JEDAC）to analyze both the temperature anomaly on the maximum anomaly curve at the tropical Pacific and the wind stress vorticity at 850 hPa. The result shows that the atmosphere response to the ocean is mainly the Gilltype mode and simultaneously, the ocean is affected by Ekman pumping level atmosphere. The statistic analysis also explains their action during from the wind stress vorticity of the low the ENSO cycle as well as the period of the E1 Nino event, which supports the theory of natural oscillator with the use of initial data to some extent.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第1期45-51,共7页
Chinese Journal of Geophysics
基金
国家自然科学基金项目(4176002
40231012)
国家科技部项目(2001CCB00500
2002CB714001)资助.
