摘要
利用NCEP/NCAR1950—1999年逐月再分析资料和奇异值分解(SVD)、相关分析等统计方法,分析了东亚冬季风和印度洋 太平洋海温在年际尺度上的耦合关系。结果表明,在年际变化尺度上,SVD分解出来的第1模态反映了东亚冬季风与同期太平洋海温之间的主要相互耦合关系,即强(弱)的东亚冬季风对应类似LaNi na(ElNi no)型的海温距平分布;超前东亚冬季风两个月左右的赤道东太平洋正(负)海温异常对后期弱(强)东亚冬季风的遥相关影响作用最显著,而弱(强)的东亚冬季风异常则对同期及落后1个月左右的南海正(负)海温异常的强迫影响作用最直接、最显著;东亚冬季风指数与落后1个月左右的热带西太平洋海温有最好的负相关关系,而与同期的热带西印度洋海温有最显著的正相关关系。
The coupling relationship between the East Asian Winter Monsoon (EAWM) and the sea surface temperature anomaly(SSTA)in inter-annual scale is studied statistically using the NCEP/NCAR re-analysis data during the period from 1950 to 1999. The results shows that, the coupling relationship between the La Nia (El Nio)-like SSTA distribution pattern in the Pacific Ocean and the strong (weak) EAWM is simply significant in inter-annual scale; the effect of the positive (negative) SSTA two months ahead of EAWM in Nio3 region on the weak (strong) EAWM is the most prominent, while the weak (strong) EAWM imposes most significantly on the positive (negative) SSTA at zero or a month lag; the best negative correlation occurs between EAWM and SSTA at a month lag in the western tropical Pacific, while the most significant positive correlation occurs between EAWM and SSTA at zero lag in western tropical Indian Ocean.
出处
《热带海洋学报》
CAS
CSCD
北大核心
2004年第2期19-27,共9页
Journal of Tropical Oceanography
基金
国家自然科学基金项目(40175018)
关键词
东亚冬季风
海温
年际尺度
耦合关系
East Asian Winter Monsoon
SST
inter-annual scale
coupling relationship
