| 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。 |
| 关键词: 海面温度 低频振荡 耦合过程 南沙与暖池 |
| DOI： |
| 分类号: |
| 基金项目:中国科学院重点资助资助项目，KZ952－S1－429号 |
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| LONG-PERIOD VARIATIONS AND COUPLING OSCILLATIONS OF SST OVER THE NANSHA AND WARMPOOL |
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XIE Qiang1, YAN Li-nong2, HOU Yi-jun1, HU Ji-fu3
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1.Institute of Oceanology,the Chinese Academy of Sciences,Qingdao,266071;2.First Institute of Oceanography,State Oceanic Administration,Qingdao,266003;3.Department of Meterology,Ocean University of Qingdao,Qingdao,266003
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| Abstract: |
| In order to improve relationship between Nansha SST and the climate of China, the Long-period Variations of surface temperature of the Nansha region and Warmpool are studied by using the polynonmial function and spectrum analysis based on the monthly mean SST data during 1934–1989. The results obtained are listed below.
1) The SST of Nansha and Warmpool over the past 56 years are in concordance with the warming trend of the global temperature, and have obvious changes on decadal time scales. Such changes 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 about 1956, which fundamentally coincided with the period of the rapid air temperature changes in eastern china; the rapid SST changes had some links with the atmosphere circulation. The change over the Warmpool took place in about 1960 (i.e. about 4 years’ lag), because the correlation between Nansha and Warmpool reached a maximum in 4-year lag. This is worth studying in the future.
3) According to their cross-spectrum characters, there are coupling oscillation in different frequencies; these oscillations may be divided into two main patterns: (1) in phase, low-frequency (period about 16.6 years) coupling oscillation and (2) out of phase, mid-frequency (period about 2 years) coupling oscillations. |
| Key words: Sea surface temperature, Low-frequency oscillation, Coupling process, Nansha and warmpool |
