| 北太平洋副热带西部模态水异常与东亚中高纬度大气环流关系的一些新认识 |
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| 引用本文： | 常蕊,张庆云,李荣凤.北太平洋副热带西部模态水异常与东亚中高纬度大气环流关系的一些新认识[J].气象学报,2011,69(4):655-663. |
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| 作者姓名： | 常蕊 张庆云 李荣凤 |
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| 作者单位： | 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;中国气象局公共气象服务中心; |
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| 基金项目： | 公益性行业(气象)科研专项(GYHY200906014); 国家自然科学基金面上项目(40975022); 国家科技支撑计划课题(2009BAC51B02) |
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| 摘 要： | 根据1958-2001年SODA(Si mple Ocean Data Assi milation)海洋同化资料和NCAR/NCEP再分析资料,利用等密度面P-矢量计算法,分析探讨了北太平洋副热带西部模态水(简称STMW)季节演变和年际变化与前期东亚-北太平洋中高纬度大气环流异常的关系。分析指出:(1)STMW的体积具有显著的季节变化特征:4月体积最大、强度最强,夏秋逐渐减弱,12月体积最小、强度最弱。研究进一步指出,STMW体积的季节变化与西北太平洋中纬度地区的海表风应力及净热通量的季节演变过程紧密联系在一起,它在一定程度上反映了西北太平洋中纬度大气环流季节性演变的特征。(2)年际尺度上,5-7月STMW指数具有显著的3年左右的振荡周期,其年际变化不仅与海洋自身动力过程有关,还与前冬亚洲-太平洋中高纬度大气环流异常引起STMW形成区风应力动力混合及海表净热通量等因子异常有关:冬季东亚季风环流偏强(弱),STMW形成区洋面风应力的动力混合作用及海表热力蒸发加强(减弱),使得海洋对流混合加强(减弱),进而加强(抑制)了混合均匀的低位涡水体进入温跃层,随着季节演变,造成5-7月STMW强度加强(减弱)。5-7月S...
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| 关 键 词： | 北太平洋副热带西部模态水 季节、年际变化 中高纬度大气环流异常 |
| 收稿时间： | 2009/8/25 0:00:00 |
| 修稿时间： | 2009/12/2 0:00:00 |
A new understanding of the relationship between the Northwestern Subtropical Mode Water anomaly and the mid high latitude atmospheric circulation over East Asia. |
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| CHANG Rui,ZHANG Qingyun and LI Rongfeng.A new understanding of the relationship between the Northwestern Subtropical Mode Water anomaly and the mid high latitude atmospheric circulation over East Asia.[J].Acta Meteorologica Sinica,2011,69(4):655-663. |
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| Authors: | CHANG Rui ZHANG Qingyun and LI Rongfeng |
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| Institution: | CHANG Rui1,2 ZHANG Qingyun1 LI Rongfeng1 1.State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China 2.Public Weather Service Center of China Meteorological Administration,Beijing 100081,China |
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| Abstract: | Based on the SODA_1.4.2 and NCAR/NCEP monthly reanalysis data from 1958 to 2001,the relationship between the seasonal and annual variations of the Northwestern Subtropical Mode Water(STMW) and the mid-high latitude atmospheric circulation over East Asia-the North Pacific is studied using the P-vector method in this paper.It is showed that:(1) The STMW is of significant seasonal variation:its volume increases in April,then gradually weakens in summer and autumn,and eventually shranks to the smallest in Decem... |
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| Keywords: | Northwestern Subtropical Mode Water Seasonal and annual variations Mid-high latitude atmospheric circulation anomaly |
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