| 巩远发,许美玲,何金海,陈隆勋. 2006. 夏季青藏高原东部降水变化与副热带高压带活动的研究[J]. 气象学报, 64(1):90-99, doi:10.11676/qxxb2006.009 |
| 夏季青藏高原东部降水变化与副热带高压带活动的研究 |
| ON THE RELATIONSHIP BETWEEN THE EASTERN TIBET PLATEAU RAINFALLAND SUBTROPICAL HIGH SHIFT IN SUMMER |
| 投稿时间：2004-08-12 修订日期：2005-05-09 |
| DOI：10.11676/qxxb2006.009 |
| 中文关键词: 副热带高压，小波变换，青藏高原，降水的活跃/中断 |
| 英文关键词:Subtropical high,Wavelet transform, Tibet plateau, Rainfall active/break |
| 基金项目:国家自然科学基金(40275029)，国家重点基础研究发展规划项目(200-CB418302)和中国科学院东亚区域气候-环境重点实验室开放课题 |
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| 中文摘要: |
| 用青藏高原上常规的台站资料和NCEP/NCAR的再分析资料，分析和研究了1993/1994年夏季5—8月青藏高原东部降水变化与西太平洋副热带高压南北移动的关系。结果表明：1993年夏季的副热带高压异常偏南，5—8月副高脊线北移过程中，还伴有准双周南北移动过程；而1994年夏季的副热带高压异常偏北，5—8月副高脊线北移过程中，则主要伴有30—60d的低频变化的南北移动过程。同时，在分析青藏高原上的天气变化特征时，发现这两年高原东部的降水变化特征也有明显的不同，夏季高原上降水的活跃和中断与副高脊线南北移动变化有类似的特征。因此，夏季西太平洋副热带高压南北移动可能与高原东部降水的中断/活跃有一定的关系。 |
| 英文摘要: |
| Based on the routine rainfall data on Tibet plateau and NCEP/NCAR reanalysis data, it is studied by the relationship between the Eastern Tibet plateau rainfall and the southward/northward shift of western pacific subtropical high in summer of 1993/1994. The results show that: the western Pacific subtropical high is abnormally located to more southern latitude and the high ridge is mainly the quai biweekly outhward/northward oscillation in its processes of northward shift from May to August in 1993; but it is abnormally located to more northern latitude and the high ridge is obviously 30—60 day southward/northward oscillation in its processes of northward shift from May to August in 1994. At the same time, it is found that the changes of the Eastern Tibet plateau rainfall active/break have the similarity characteristics of the high ridge southward/northward oscillation.Therefore, the southward/northward shift of the western Pacific subtropical high in summer maybe related to the changes of Eastern Tibet plateau rainfall active/break. |
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