J4 ›› 2003, Vol. 21 ›› Issue (4): 27-31.

• 论文 • 上一篇    下一篇

甘肃2002年伏秋连旱的气候异常及成因诊断

刘德祥1董安祥2瞿汶1   

  1. 1.兰州中心气象台,甘肃兰州730020;2.中国气象局兰州干旱气象研究所,甘肃兰州730020
  • 收稿日期:2003-06-18 修回日期:2003-12-18 出版日期:2003-12-31 发布日期:2003-12-31
  • 作者简介:刘德祥(1948一),男,甘肃廿谷人,高级工程师,长氏期从事干旱气候变化和影响研究
  • 基金资助:

    甘肃省科技攻关项目(GS012一A45一118)西北干旱成因及应用研究资助

The Dynamic D认gnose on the Abnormity and Cause of Summer and Autumn Continuos arid of 2002 in Gansu rovince

 LIU De-Xiang1 DONG An-Xiang2,JI Men1   

  1. I .Lanzhou Central Meteorolo乡cal Observatory,Lanzhou  73U(,2} ,C'hina;
    2. Institute of Arid Meteorology ,CMA ,Lanzhou  730020 ,China
  • Received:2003-06-18 Revised:2003-12-18 Online:2003-12-31 Published:2003-12-31

摘要:

针对甘肃2002年伏秋连旱的持续时间、范围和强度进行了对比分析,干旱持续时间之长、范围之大为近50 a所少见。伏秋连旱的成因主要是欧亚500Hpa中高纬度西风环流比较强,贝加尔湖脊强,西北太平洋副热带高压强,印度半岛南支槽浅.亚洲大陆海平面气压场偏高,厄尔尼诺事件和海表温度异常共同作用所致。这些结果对防灾减灾措施的制定和作为短期气候预测的气候背景都有重要的参考意义。

关键词: 甘肃省, 伏秋连旱特征, 影响, 成因诊断

Abstract:

A study was carried out about the duration time,scop e,and intension of the 2002 summer and autumn continuous drought  in Cransu,which long duration time and heavy intension scarcely appeared in recent 50 years. The causes of continuous drought were ainly depended on that Westerly circumfluence,and the High ridge over Baikal and Northwestern Pacific very strong ;the trough ver Southern Indian Peninsula weak; the sea levelpressure departure on the high side;sea surface temperature anomaly and El Nino ccurring. All those above together forced into continuous drought in Cransu Province.  These results were significantly to establish the reventing and reducing calamities rules and valuably to short一term climate forecast.

Key words: Gansu province, summer and autumn continuous arid , influence, dynamic diagnose

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