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| 东亚冬夏季风对热带印度洋秋季海温异常的响应 | |
| 引用本文： | 李东辉,谭言科,张瑰,叶志敏.东亚冬夏季风对热带印度洋秋季海温异常的响应[J].热带海洋学报,2006,25(4):6-13. |
| 作者姓名： | 李东辉 谭言科 张瑰 叶志敏 |
| 作者单位： | 1. 中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室,北京,100029;南京军区气象水文中心,江苏,南京,210016 2. 解放军理工大学气象学院,江苏,南京,211101 3. 解放军理工大学理学院,江苏,南京,211101 4. 南京军区气象水文中心,江苏,南京,210016 |
| 基金项目： | 国家自然科学基金;国家重点实验室基金 |
| 摘 要： | 利用多年的Reynolds月平均海表温度资料和NCEP/NCAR全球大气再分析资料,分析了热带印度洋秋季海表温度距平(SSTA)与后期东亚冬夏季风强度变化的关系。结果表明,热带印度洋秋季SSTA的主要模态是全区一致(USB)型和偶极子(IOD)型,USB型模态主要代表热带印度洋秋季SSTA的长期变化趋势,而IOD型模态主要反映热带印度洋秋季SSTA的年际变化。热带印度洋秋季海温气候变率中既存在着明显的ENSO信号,也有独立于ENSO的变率特征,独立于ENSO的热带印度洋秋季SSTA变化的主要模态仍是USB型和IOD型。前期秋季USB模态与东亚冬季风及东亚副热带夏季风之间为负相关关系;与前期正(负)IOD模态相对应,南海夏季风强度偏弱(强),而东亚副热带夏季风强度偏强(弱)。USB型和IOD型模态对后期东亚冬、夏季风强度变化的影响是独立于ENSO的,但ENSO起到了调节二者相关显著程度的作用。 |
| 关 键 词： | 热带印度洋 海表温度距平 东亚季风 ENSO |
| 文章编号： | 1009-5470（2006）04-0006-08 |
| 收稿时间： | 2005-06-09 |
| 修稿时间： | 2005-06-092005-09-12 |
Responses of East Asian winter and summer monsoons to autumn sea surface temperature anomalies in tropical Indian Ocean |
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| LI Dong-hui,TAN Yan-ke,ZHANG Gui,YE Zhi-min.Responses of East Asian winter and summer monsoons to autumn sea surface temperature anomalies in tropical Indian Ocean[J].Journal of Tropical Oceanography,2006,25(4):6-13. | |
| Authors: | LI Dong-hui TAN Yan-ke ZHANG Gui YE Zhi-min |
| Abstract: | The relationships between autumn sea surface temperature(SST) anomalies in the tropical Indian Ocean and the strength of the East Asian winter and summer monsoons are investigated by analyzing Reynolds monthly SST dataset and NCEP/NCAR atmospheric reanalysis data.The results show that there are two dominant modes of autumn SST anomalies in the tropical Indian Ocean,the unanimous signed basin-wide(USB) mode and the Indian Ocean dipole(IOD) mode,respectively.The USB mode mainly shows a long term warming tendency of the tropical Indian Ocean,while the IOD mode reveals the interannual variations.By removal of ENSO-dependent variability,the SST anomalies in the tropical Indian Ocean mainly appear to be the USB and IOD modes.The USB mode exhibits significant negative correlations with the strength of the East Asian winter monsoon and the East Asian subtropical summer monsoon.When the positive(negative) IOD exists in the tropical Indian Ocean during the preceding boreal fall season,the South China Sea summer monsoon is weakened(strengthened),and the East Asian subtropical summer monsoon is strengthened(weakened).The relations of the dominant modes to the strength of the East Asian winter and summer monsoons are ENSO-independent variable,but the significance of the correlation can be modulated by ENSO. |
| Keywords: | tropical Indian Ocean sea surface temperature anomaly East Asian monsoon ENSO |
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