主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报 ›› 2017, Vol. 33 ›› Issue (3): 80-87.doi: 10.3969/j.issn.1673-503X.2017.03.010

• 论文 • 上一篇    下一篇

基于不同干旱指数鲁中地区干旱变化规律研究

环海军1, 姚丹丹2, 刘岩1, 夏福华1   

  1. 1. 淄博市气象局, 山东 淄博 255048;
    2. 山东工业职业学院, 山东 淄博 255048
  • 收稿日期:2016-07-17 修回日期:2016-11-04 出版日期:2017-06-30 发布日期:2017-06-30
  • 作者简介:环海军,男,1987年生,工程师,主要从事农业气象研究,E-mail:zbqxjhhj@163.com。
  • 基金资助:
    山东省气象局青年科研基金项目“鲁中地区土壤水分时空变化规律及预报技术研究”(2015SDQN14)资助。

Research on the variation of drought in the middle of Shandong province based on different drought indices

HUAN Hai-jun1, YAO Dan-dan2, LIU Yan1, XIA Fu-hua1   

  1. 1. Zibo Meteorological Serivce of Shandong province, Zibo 255048, China;
    2. Shandong Vocational College of Industry, Zibo 255048, China
  • Received:2016-07-17 Revised:2016-11-04 Online:2017-06-30 Published:2017-06-30

摘要: 利用1980—2014年鲁中地区8个代表气象站逐日的气象观测资料,采用累积频率法对5种干旱指数的阈值进行修正,分析了鲁中地区干旱的时空变化特征,并研究不同干旱指数在鲁中地区的适用性。结果表明:1980—2014年鲁中地区5种干旱指数计算的年平均干旱日数为92—106 d,干旱中心位于鲁中中部地区,干旱日数随时间变化均呈减少趋势,减少幅度为2—6 d/10 a,其中综合气象干旱指数对干旱持续时间长和干旱程度较重年份的监测效果较好;鲁中地区四季干旱日数监测效果较好的干旱指数不同,春季、夏季和冬季干旱日数随时间呈减少的趋势,四季干旱日数的空间变化规律不一致;鲁中地区干旱日数最多和最少的月份分别为5月、8月,干旱日数年变化呈近余弦的变化规律,鲁中地区不同月份干旱日数监测适用的干旱指数不同。

关键词: 干旱指数, 阈值, 适用性

Abstract: Based on the daily meteorological data from 8 representative weather stations in the middle of Shandong province during 1980 to 2014,a cumulative frequency method was adopted to correct the thresholds of five drought indices.The temporal-spatial variation characteristics of drought and the applicability of each drought index in the studied area were analyzed.The results show that mean annual drought days calculated using the five indexes are about 92 to 106 days.It has a decreasing trend with decadal decreasing rates ranging between 2 and 6 days per decade.The center of drought area is located in the middle part of the central Shandong province.The compound drought index is the best indicator among the five indices for recognizing severe and long-duration drought years.The suitable drought index varies with seasons in the research area.Drought days in spring,summer and winter are declining during the 35 years and spatial change characteristics of drought days are different among four seasons.In addition,the most and the least droughts occurs respectively in May and August.Annual pattern of monthly drought days appears to be an approximate cosine rule.Besides,the drought indices which work most effectively in recognizing drought days vary from one month to another.

Key words: Drought index, Threshold, Applicability

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