摘要
利用多项式函数分析了南沙和暖地海温的长期变化，发现两海域的海面温度（SST）1934－1989年56年来有明显地增温趋势，并且存在着SST变化的周期和突变现象。根据交叉谱分析特征，两海区SST之间存在不同频率的耦合振荡，可分为两种主要类型：周期约为16．6年的同相低频耦合振荡和周期约为2年的反位相耦合振荡。
In order to improve relationship between Nansha SST and the climate of China, theLong-period Variations of surface temperature of the Nansha region and Warmpool are studied byusing the Polynomial function and spectrum analysis based on the monthly mean SST data during1934-1989. The results obtained are listed below.1) The SST changes of Nanstia and Warmpool over the past 56 years are in concordance withthe warming trend of the global temperature, and have obvious changes on decadal time scales. Suchchanges are not completely the same for the two sea areas; some lag exists.2) Rapid SST changes happened in both sea areas. The changes over Nansha were in aboutl956, which fundamental1y coincided with the period of the rapid air temperatare changes in easternChna; the rapid SST changes had some links with the atlnosphere cireulation. The change over theWarmpool took place in about 1960 (i. e. about 4 years' lag), because the correlation betweenNansha and WarmPoo1 reached a maximum in 4-year lag. ms is worth studying in the fubo.3) According to their cross spectr-um characters, there are coupling oscillation in differentfrequencies; these oscillations may be divided into two main patterns: (1) in phase, low-frequency(period about l6.6 years) coupling oscillation and (2) out of phase, midfrequency (period about 2years) coupling oscillations.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
1999年第1期88-96,共9页
Oceanologia Et Limnologia Sinica
基金
中国科学院重点资助!KZ952-S1-429
关键词
海面温度
低频振荡
耦合过程
暖池
南沙群岛
Sea surface temperature Low-frequency oscillation Coupling process Nansha and warmpool
