湖北农业科学 ›› 2020, Vol. 59 ›› Issue (9): 65-69.doi: 10.14088/j.cnki.issn0439-8114.2020.09.013

• 资源·环境 • 上一篇    下一篇

厄尔尼诺现象对西藏5月降水的影响

洛桑旺姆1, 达琼2, 普布卓玛1   

  1. 1.西藏自治区气象局,拉萨 850000;
    2.西藏山南市气象局,西藏 山南 856000
  • 收稿日期:2019-09-15 出版日期:2020-05-10 发布日期:2020-07-22
  • 通讯作者: 达琼,女(藏族),工程师,(电话)13989037370。
  • 作者简介:洛桑旺姆(1974-),女(藏族),高级工程师,主要从事气象服务,(电话)13908932533(电子信箱)805991733@qq.com;普布卓玛,女(藏族),工程师,(电话)13989985213。
  • 基金资助:
    西藏自治区科学技术厅自然基金项目(XZ2018ZRG -148)

Effect of El Niño on may precipitation of Tibet

Luosangwangmu1, Daqiong2, Pubuzhuoma1   

  1. 1. Tibet Meteorological Bureau,Lhasa 850000, China;
    2. Shannan City Meteorological Bureau, Shannan 856000, Tibet, China
  • Received:2019-09-15 Online:2020-05-10 Published:2020-07-22

摘要: 利用1979—2017年NOAA海温距平场数据、NCEP/DOE风场和大气可降水量场数据以及PREC/L降水数据对厄尔尼诺现象影响西藏5月降水进行了分析。结果表明,厄尔尼诺发生年,中南半岛700 hPa出现反气旋环流差值,形成下沉气流,大气可降水量偏少,西藏降水偏少;拉尼娜发生年,中南半岛700 hPa出现气旋环流差值,形成上升气流,大气可降水量偏多,西藏降水偏多。

关键词: 热带海温, SEOF, 降水, 东亚急流, 厄尔尼诺, 西藏

Abstract: Based on the data of NOAA sea surface temperature anomaly field, NCEP/DOE wind field, atmospheric perceptible water field data and PREC/L precipitation data from 1979 to 2017, the effects of El Niño on May precipitation of Tibet were analyzed. The results shows that during the year of El Niño, there is an anti-cyclone circulation deviation at 700 hPa in the Indo-China peninsula, which form subsidences, and there is less perceptible water in the atmosphere and less rainfall in Tibet. In the year of La Nina, a cyclone in the Indo-China peninsula occurs at 700 hPa, resulting in updrafts. The amount of perceptible water in the atmosphere is high, and precipitation in Tibet is high.

Key words: tropical SST, SEOF, precipitation, East Asian jet, El Ni$\widetilde{n}$o, Tibet

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