热带印度洋海表面温度与海面净热通量耦合主模态的气候演变特征
Climatic evolution characteristics of the coupled main mode of the sea surface temperature and net sea surface heat flux in the tropical Indian Ocean
杨梦兮 1胡瑞金 2刘梅 3张银意 4史达伟4
作者信息
- 1. 江苏省泰州市气象局,江苏泰州 225300
- 2. 中国海洋大学物理海洋实验室和山东省高校海洋-大气相互作用与气候重点实验室,山东青岛 266100
- 3. 江苏省气象台,江苏南京 210008
- 4. 江苏省连云港市气象局,江苏连云港 222002
- 折叠
摘要
利用1960年1月-2008年12月共49 a的SODA的SST资料和ECWMF的海面净热通量的资料,采用滑动SVD方法,对热带印度洋上两场异常耦合主模态的气候演变特征进行了分析,并对显著变化的时间、地点分别进行了判定.结果表明:(1)耦合作用在演变过程中有逐渐加强的趋势,两场的相关性一直保持的较好.(2)整个演变过程中,海面净热通量异常可以较好地解释大部分时段内海表面温度异常(SSTA)场本身的变化,变化幅度最大的地方位于苏门答腊-爪哇沿岸和20°S以南的海域;并且在其影响下,海盆在大部分时段内呈增温趋势.(3)耦合主模态两个场的空间分布都在1961-1970年到1962-1971年之间发生了唯一一次显著的变化,显著影响时间都为1971年.(4)SSTA场变化显著的地点主要位于东北印度洋和南海,为明显的正变化区,而20°S以南的海域呈明显的负变化;海面净热通量异常场分别在南海海域和赤道东印度洋及马达加斯加偏东的部分海域呈明显的正、负变化.
Abstract
Based on a total of 49a sea surface temperature(SST)data of SODA and net sea surface heat flux data of ECMWF from January 1960 to December 2008,the climatic evolution characteristics of the coupled main mode of the two anomalies were studied in the tropical Indian Ocean by using moving SVD method.The main results were as follows:(1)The coupling effect was gradually strengthened in the evolution process,the correlations between the two fields maintain well.(2)The sea surface net heat flux anomaly can better explain the basin variations of the SSTA field itself in most periods with the largest variations locating in the coastal area of Sumatra-Java and the sea area south of 20°S.And under its influence,the sea basin showed a warming trend in most periods.(3)The spatial distribution of the two fields of the coupled main mode changed significantly once from 1961～1970 to 1962～1971,under the significant influence of the year 1971.(4)The SSTA field changed significantly in the north-east Indian Ocean and the South China Sea with obvious positive change areas,while the sea area south of 20°S showed obvious negative changes.The net sea surface heat flux anomaly filed showed signifi-cant positive and negative changed in the South China Sea,the equatorial eastern Indian Ocean and somewhere east of Madagascar,respectively.
关键词
热带印度洋/SSTA/海面净热通量/滑动SVD/主模态/时空演变Key words
tropical Indian Ocean/SSTA/net sea surface heat flux/moving SVD/main mode/spatial-temporal evolution引用本文复制引用
基金项目
江苏省气象局重点研发项目(KZ202101)
江苏省气象局青年基金(KQ202223)
出版年
2024
NETL
NSTL
万方数据