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| 南印度洋偶极子的特征及其与ENSO的关系 | |
| 引用本文： | 张岚,杜岩,张玉红,徐海明.南印度洋偶极子的特征及其与ENSO的关系[J].大气科学学报,2014,37(6):695-704. |
| 作者姓名： | 张岚 杜岩 张玉红 徐海明 |
| 作者单位： | 1. 江苏省气象服务中心,江苏南京210008;中国科学院南海海洋研究所热带海洋环境国家重点实验室,广东广州510301;南京信息工程大学大气科学学院,江苏南京210044 2. 中国科学院南海海洋研究所热带海洋环境国家重点实验室,广东广州,510301 3. 南京信息工程大学大气科学学院,江苏南京,210044 |
| 基金项目： | 国家重点基础研究发展计划(973计划)项目，国家自然科学基金资助项目 |
| 摘 要： | 利用逐月OISST、ERSST及NCEP2表面风场等资料探讨了南印度洋偶极子(Southern Indian Ocean Dipole,SIOD)的结构特征、形成原因及其与ENSO的关系。结果表明:在南印度洋,偶极子形态的年际海表面温度异常在10—12月出现,次年2月达到极值,随后的4—6月消亡。SIOD的形成主要是风场、潜热通量和短波辐射通量起作用,混合层深度异常加厚或变浅有助于SIOD的形成。近30 a资料表明,SIOD的盛期超前ENSO 9~10个月,且具有季节锁相特征。20世纪70年代中期发生年代际气候突变后,SIOD与ENSO的相关关系显著增强。正SIOD事件之后一般都有El Nio事件发生,负SIOD事件之后都有La Nia事件发生。 |
| 关 键 词： | 南印度洋偶极子 ENSO 海表面温度异常 |
| 收稿时间： | 2012/4/3 0:00:00 |
| 修稿时间： | 2014/3/25 0:00:00 |
Characteristics of Southern Indian Ocean Dipole and its relationships with ENSO |
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| ZHANG Lan,DU Yan,ZHANG Yu-hong and XU Hai-Ming.Characteristics of Southern Indian Ocean Dipole and its relationships with ENSO[J].大气科学学报,2014,37(6):695-704. | |
| Authors: | ZHANG Lan DU Yan ZHANG Yu-hong and XU Hai-Ming |
| Institution: | Jiangsu Meteorological Service Center, Nanjing 210008, China;State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;School of Atmospheric Sciences, NUIST, Nanjing 210044, China;State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;School of Atmospheric Sciences, NUIST, Nanjing 210044, China |
| Abstract: | Based on OISST, ERSST and NCEP2 monthly surface wind data, the structure characteristics and formation of Southern Indian Ocean Dipole(SIOD) and its correlation with ENSO are investigated.Results show that SIOD develops from October to December, peaks in following February, and decays from April to June.Wind, latent heat flux and shortwave radiation fluxes play an important role in the formation of SIOD.The change of the mixed layer depth also contributes to the formation of SIOD.In recent three decades, SIOD are phase-locked to the austral summer season, preceding the ENSO signal by nine-to-ten months.Furthermore, the relationship between SIOD and ENSO is enhanced after interdecadal abrupt climate change in the mid-1970s.El Niño events usually occur after positive SIOD and La Niña events occur after negative SIOD. |
| Keywords: | Southern Indian Ocean Dipole ENSO sea surface temperature anomaly |
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