摘要
为了研究太平洋海表面温度季节内振荡的特征,利用NOAA(national oceanic and atmospheric ad-ministration)周平均SST资料,采用谐波方法重构了太平洋海表面温度季节内振荡信号,针对不同海域,用小波分析等方法,揭示了SST季节内振荡的空间、频谱、季节性和传播特征。结果表明:海表面温度季节内振荡在黑潮区、黑潮续流区和赤道东太平洋较活跃,在赤道东西太平洋有相对重要的地位;在北太平洋谱特征均为单峰结构,在赤道东西太平洋呈双峰结构。不同海域海表面温度季节内振荡的活跃期分别为:北太平洋夏秋季,赤道东太平洋春和秋季,热带西太平洋活跃期较分散;在北太平洋以缓慢东传为主,在赤道东太平洋以西传为主,在热带西太平洋无明显传播。
In order to further study the characteristics of Pacific sea surface temperature（SST） intraseasonal oscillation （SST ISO）, the NOAA data was used, Through harmonic analysis and wavelet analysis, the characteristics in relation to spatial, temporal, spectrum and propagation SST ISO were revealed. The result shows that the active domains of Pacific SST ISO are the Kuroshio domain, Kuroshio extension domain and equatorial eastern Pacific Ocean, In comparison with SST interannual variation, that of the SST ISO is more important in east and west equatorial Pacific. The spectrum characteristics of SST ISO in north Pacific domain are singlet while in east and west equatorial Pacific are double peak. The major active periods are summer and autumn in north Pacific, spring to autumn in east Pacific, end of summer to begining of winter in west equatorial Pacific. SST ISO mainly propagates eastward in north Pacific, and mainly propagates westward in equatorial east Pacific, while in the domain of west equatorial Pacific, there is no obvious propagation.
出处
《解放军理工大学学报（自然科学版）》
EI
2008年第2期194-200,共7页
Journal of PLA University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(40405010)
关键词
海表面温度
季节内振荡
时空特征
SST（sea surface temperature）
ISO （intraseasonal oscillation）
spatial-temporal characteristics
