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中国农学通报 ›› 2016, Vol. 32 ›› Issue (2): 142-148.doi: 10.11924/j.issn.1000-6850.casb15080037

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

影响山西夏季降水的水汽输送研究

郭媛媛,武永利,董春卿,赵 瑜,乔 钰   

  1. (山西省气象台,太原 030006)
  • 收稿日期:2015-08-05 修回日期:2015-09-08 接受日期:2015-09-25 出版日期:2016-01-28 发布日期:2016-01-28
  • 通讯作者: 郭媛媛
  • 基金资助:
    山西省气象局课题“影响山西夏季降水的水汽输送及其源地的研究”(SXKYBYB20138708)、“山西夏季区域性高温中期预报方法研究”(SXKYBTQ201510015);山西省气象局重点课题“公里网格中尺度数值模式建设”(SXKZDTQ201510007)。

Vapor Transport Affecting Summer Precipitation in Shanxi

Guo Yuanyuan, Wu Yongli, Dong Chunqing, Zhao Yu, Qiao Yu   

  1. (Shanxi Meteorological Observatory, Taiyuan 030006)
  • Received:2015-08-05 Revised:2015-09-08 Accepted:2015-09-25 Online:2016-01-28 Published:2016-01-28

摘要: 利用山西省58个代表站近50年的夏季降水资料和NCAR/NCEP逐月再分析资料,分析影响山西夏季降水的水汽输送特征,应用SVD方法等探讨影响山西夏季降水异常的水汽源地和水汽输送关键区。结果表明:山西夏季降水与热带西太平洋—南海的东风气流,热带印度洋越赤道气流以及南海—华南的水汽输送带有关,同时也受到中纬度西风带中水汽输送影响。夏季水汽输送与山西夏季降水具有显著的遥相关关系,山西夏季降水异常的水汽异常来源包括副高南侧的热带西太平洋—南海的偏东风水汽输送异常,和印度洋—阿拉伯海地区越赤道气流的偏西风水汽输送异常,山西夏季降水的水汽输送“关键区”位于云贵高原中部到四川盆地东部的矩形区域。由整层水汽输送通量标准化处理建立的水汽输送源指数和水汽输送指数,可以表征水汽输送异常对于山西夏季降水的影响。研究结果可以为山西汛期降水异常分析和汛期预测提供参考依据。

关键词: 苯唑草酮, 苯唑草酮, 土壤, 吸附, 腐殖酸

Abstract: Based on the rainfall data of 58 stations in Shanxi Province and the NCEP/NCEP monthly reanalyzed data, vapor transport characteristics of summer precipitation were studied, and the moisture sources and transport critical areas were revealed with SVD method. The results showed that the summer precipitation in Shanxi was connected with the east wind flow from tropical western Pacific to the South China Sea, the cross-equatorial flow in tropical Indian Ocean, the water vapor conveyor from the South China Sea to southern China and the vapor transport in the mid-latitude westerlies. There was a significant tele-correlation between Shanxi summer precipitation and summer moisture transport. The moisture transport sources were located in the monsoon from the tropical western Pacific to the South China Sea, and the cross-equatorial flow area from Indian Ocean to the Arabian Sea. The moisture transport critical area of Shanxi summer precipitation was located in the rectangular area from Yunnan-Guizhou Plateau to eastern Sichuan Basin. These indexes of moisture transport, constructed by the whole layer vapor transport flux standardization, could demonstrate the effects of water vapor transport on summer precipitation in Shanxi. Results presented in this paper would provide certain reference basis for the analysis and prediction of Shanxi regional precipitation in flood season.

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