| 1999年夏季江淮地区热源和水汽汇时空变化特征 |
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| 引用本文： | 彭京备,宋正山.1999年夏季江淮地区热源和水汽汇时空变化特征[J].气候与环境研究,2001,6(2):153-160. |
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| 作者姓名： | 彭京备 宋正山 |
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| 作者单位： | 中国科学院大气物理研究所, |
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| 基金项目： | 国家自然科学基金资助项目 49794030 |
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| 摘 要： | 利用1999年的NCAR再分析网格点风场、温度场、湿度场及含HUBEX试验加密观测的降水资料等,诊断分析了夏季长江流域梅雨暴雨集中期及其前后江淮地区的大气热源、水汽汇的时空分布及多时间尺度特征.
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| 关 键 词： | 梅雨 热源 水汽汇 多时间尺度 |
| 修稿时间： | 2001年3月1日 |
The Characteristics of Temporal and Spatial Variations of Heat Sources,Moisture Sinks over the Changjiang-Huaihe Valley in Summer 1999 |
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| Peng Jingbei and Song Zhengshan.The Characteristics of Temporal and Spatial Variations of Heat Sources,Moisture Sinks over the Changjiang-Huaihe Valley in Summer 1999[J].Climatic and Environmental Research,2001,6(2):153-160. |
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| Authors: | Peng Jingbei and Song Zhengshan |
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| Abstract: | The characteristics of temporal and spatial variation of heat source and moisture sink over the Changjiang-Huaihe valley in summer of 1999 are examined by using the NCEP / NCAR reanalysis data and rainfall record over 87 stations of China (including the observation during the IOP of HUBEX). The precipitation concentrated over the Changjiang valley was from June 22 to July 2 of 1999. During the Meiyu Period, the convective precipitation was dominant over the center of rainfall area, and the atmosphere was mainly heated by the release of condensation latent heat. The main area of Q1, Q2 with large positive value coincide with intensity upward motion and rainfall center. The fluctuation of vertical motion was in-phase with heat source and moisture sink. The mesoscale variations whose period is shorter than 3 days were obvious, but stratiform precipitation was dominant over the Huaihe valley where precipitation was small. |
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| Keywords: | Meiyu heat source moisture sink multiple time-scale |
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