全球和南海海平面变化及其与厄尔尼诺的关系  

Mean Sea Level Change in the Global Ocean and the South China Sea and Its Response to ENSO

作　　者：荣增瑞[1] 刘玉光[1] 陈满春[2] 宗海波[1] 修鹏[1] 文凡[1] 

机构地区：[1]中国海洋大学物理海洋实验室,山东青岛266003 [2]国家海洋信息中心,天津300171

出　　处：《海洋通报》2008年第1期1-8,共8页Marine Science Bulletin

基　　金：973课题(973-2007CB411807);863课题(863-2006AA09Z140)

摘　　要：利用卫星高度计资料,分析了1993年1月至2004年12月全球和南海的海平面变化特征。结果表明,在1993—2004年期间,全球和南海海平面的平均上升率分别为(2.5±0.2)mm/a和(4.8±1.2)mm/a。研究发现,全球和南海海平面的低频变化都与El Nio密切相关,但二者对El Ni?o的响应位相相反。1997—1998年El Nio初期,全球平均海平面升高,呈现正异常;El Nio后期,全球平均海平面下降并由正异常变为负异常。南海平均海平面在El Nio期间呈现负异常,在La Nia期间呈现正异常,其低频变化与南方涛动指数的低频分量位相变化几乎完全一致。ENSO可以通过南海季风和北太平洋环流(黑潮)的变化来影响南海海平面。El Nio发生前后的北风异常,以及同期黑潮流量的变化都对ENSO影响南海有一定的贡献。The mean sea level change in the global ocean and the South China Sea was investigated based on the Sea Level Anomalies given by CNES. The rising rates in the global ocean and the South China Sea are （2.5±0.2 ） mm / a and （ 4.8±1.2 ） mm / a, respectively. Detailed analysis shows that the sea level variability is closely related to ENSO. When the E1 Nino took place in the period of 1997-1998, the global sea level behaved on a positive anomaly, but the regional sea level of the South China Sea behaved on a negative anomaly. During the La Nina period of 1999-2000, a reverse situation took place. Compared with the global mean sea level, the response of the regional sea level of the South China Sea to ENSO has a reverse phase and a much large range. Sea level variability in the South China Sea has a stronger signature of ENSO. Sea level variability in the South China Sea and SOI run almost synchronously. ENSO can influence the sea level change of the South China Sea through variations of the South China Sea monsoon and invading water from the Kuroshio.

关 键 词：海平面异常 南海 全球变暖 E1 Nino 黑潮 

分 类 号：P731.2[天文地球—海洋科学] P732