| 摘要: |
| 根据1955—1999 年间的JEDAC 月平均海温资料, 利用Morlet 小波变换方法, 对西太平洋暖池东、西代表区热含量的时(间) - 频(率) 特征进行了分析, 并用交叉谱分析方法探讨了两海区热含量间的耦合振荡。结果表明, 暖池热含量的时频特征具有明显的区域性, 即暖池东、西区热含量的年际和年代际变化都是反相的, 且其年际变化的时频特征有较大差异; 暖池东、西区热含量间主要存在着年际( 43 个月) 和年代际( 172 个月) 时间尺度的反位相耦合振荡。 |
| 关键词: 西太平洋暖池, 热含量, 时频特征, 区域性 |
| DOI： |
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| 基金项目:国家重点基础研究发展规划资助项目, G1998040900 号第一部分; 中国科学院知识创新工程资助项目, KZCX2-205 |
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| REGIONAL DIFFERENCES OF TIME-FREQUENCY FEATURE IN HEAT CONTENT OF THE WESTERN PACIFIC WARM POOL |
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ZHANG Qi-Long, WENG Xue-Chuan
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Institute of Oceanology, The Chinese Academy of Sciences
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| Abstract: |
| The time-frequency features and the coupling oscillations in the heat contents of the east and west regions in the western Pacific warm pool were analyzed by using the Morlet wavelet transformation method and the cross spectrum analysis method based on the monthly mean temperature data over the Pacific Ocean during 1955—1999 offered by JEDAC. The results showed that the warm pool heat contents are of obvious regional differences in time-frequency feature. The heat contents of both the east and the west regions have contrary interannual and interdecadal changes. And there is a large difference between their time-frequency features in the interannual scale. It is found that there are mainly out of phase interannual (43-month) and interdecadal (172-month) time scale coupling oscillations in the heat contents of these two regions. |
| Key words: The western Pacific warm pool, Heat content, Time-frequency feature, Regional difference |
