干旱气象 ›› 2010, Vol. 28 ›› Issue (1): 30-34.

• 论文 • 上一篇    下一篇

甘肃省近46 a年降水结构空间变化分析

韩 晖孟丽霞   

  1. 1.中国气象局兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室,中国气象局干旱气候变化与
    减灾重点开放实验室,甘肃 兰州 730020.兰州中心气象台,甘肃 兰州 730020
  • 收稿日期:2009-10-03 修回日期:2009-11-18 出版日期:2010-04-01 发布日期:2010-04-01
  • 作者简介:韩晖(1975-),男,湖北武汉人,硕士,助研,主要从事气象灾害研究.E-mail:hhsd@sina.com
  • 基金资助:

    兰州干旱气象研究所启动课题资助

Study on the Spa tia l Var ia tion of Annua l Prec ip ita tion Structure over Gan su Prov ince Dur ing Recen t 46 Years

 HAN  Hui 1, MENG Li-Xia2   

  1. 1.Key Laboratory of A rid Clim ate Change and Reducing D isaster of Gansu Province, Key Open Laboratory of A rid Clim ate Change and D isaster Reduction of CMA, Institute of A rid M eteorology, ChineseM eteorological Adm inistration, Lanzhou 730020, China; 2. Lanzhou CentralM eteorological Observatory, Lanzhou 730020, China
  • Received:2009-10-03 Revised:2009-11-18 Online:2010-04-01 Published:2010-04-01

摘要:

 通过对甘肃省1960~2005年62个气象站逐日降水量的分析,得出反映年内降水结构的2类指标:不同强度降水日数构成和降水相关极值的空间变化特征。结果表明,全省范围内降水各指标均没有同质的变化,说明降水变化的空间差别很大,从区域平均值角度难以得到有用信息;而降水结构分析从微观解构宏观状况,可以更好地说明降水的变化特征。对降水结构的空间变化进一步分析说明,一个区域的降水是否有显著的变化趋势,是各降水相关指标变化的综合作用结果,这种组合非常复杂,通常不具备广泛的代表性,各个指标非显著性变化的组合结果可以是降水量要素的显著变化。

关键词: 甘肃省, 年降水结构, 空间变化

Abstract:

Based on the analysis of daily p recip itation of 62 weather stations in Gansu Province from 1960 to 2005, it educed the characteristics of spatial variation of different intensity p recip itation days and p recip itation relative extremes, and those can reflect the structure of p recip itaiton. The results show that there isn’t any homogeneous variation over the whole p rovince for each indicator, and the spatial distinction of p recip itation variation is great. Thus, the regional average of p recip itation ismeaningless and the structure ismore powerful to exp lain the change of p recip itation, for which decomposed the dim unitary situation into vivid particular phenomena. The farther research on spatial variation of p recip itation structure indicates that a significant variation of p recip itation in a specific region is a synthetical consequence of the interactions among all indicators. This synthesis p rocedure is very comp licated, and usually has not broad rep resentation. Even nonsignificant variation of each indicator can bring forth a significant variation of p recip itation.

Key words: Gansu Province, annual p recip itation structure, spatial variation

中图分类号: