[1]祁俊青,于文金,谢涛,等.云南省干旱灾害时空变化特征[J].江苏农业学报,2019,(03):631-638.[doi:doi:10.3969/j.issn.1000-4440.2019.03.018]
　QI Jun-qing,YU Wen-jin,XIE Tao,et al.Spatial and temporal variation characteristics of drought disasters in Yunnan province[J].,2019,(03):631-638.[doi:doi:10.3969/j.issn.1000-4440.2019.03.018]
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云南省干旱灾害时空变化特征()
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江苏农业学报[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2019年03期
页码:
631-638
栏目:
耕作栽培·资源环境
出版日期:
2019-06-30

文章信息/Info

Title:
Spatial and temporal variation characteristics of drought disasters in Yunnan province
作者:
祁俊青; 于文金; 谢涛; 任满亮
(南京信息工程大学地理科学学院，江苏南京210044)
Author(s):
QI Jun-qing; YU Wen-jin; XIE Tao; REN Man-liang
(School of Geographical Sciences, Nanjing University of Information Science and Technology, Nanjing 210044, China)
关键词:
云南; 干旱; 综合气象干旱指数（CI）; 时空分布
Keywords:
Yunnan province;  drought;  compound index of meteorological (Ci);  spatial and temporal distribution
分类号:
S565.101
DOI:
doi:10.3969/j.issn.1000-4440.2019.03.018
文献标志码:
A
摘要:
利用云南省1956-2010年55年实测气象资料，对云南省的气温和降水量进行了小波周期分析，再计算16个代表站点历年逐日的综合气象干旱指数（Ci），统计近60年各站点出现的干旱过程，分析云南省各地区干旱发生的频率、不同等级干旱发生的多年平均天数，揭示云南省干旱发生的时空分布特征。结果表明：（1）云南省气温呈现冷暖年交替变化规律，存在明显的4年左右变化主周期，在1980年之后气温呈逐步上升的趋势；降水量变化呈现波动状态，相对稳定，存在2年左右的变化主周期。（2）空间变化上，全省大范围地区都有干旱发生，干旱分布整体呈现由西北向东南逐渐增强的特点；干旱天数最多区域出现在东南部地区，而西南地区干旱天数较少。（3）季节变化上，春旱较易发生，干旱频率的多年平均值达到60%以上，夏季和秋季干旱频率相对小些，而冬旱发生的频率最高，但对人类的影响较小。
Abstract:
In this paper, the measured meteorological data of Yunnan province from 1956 to 2010 were used, and the wavelet cycle analysis was carried out on the temperature and precipitation in Yunnan province. The compound index of meteorological (Ci) of 16 representative stations over the years was calculated, and the drought process occurred at each site in the past 60 years had been counted. The frequency of drought occurrence in various regions of Yunnan province and the average days of drought occurrence in different grades were analyzed, revealing the spatial and temporal distribution characteristics of drought occurrence in Yunnan province. The results showed that the temperature in Yunnan province changed alternately between cold and warm years, and there was an obvious main cycle of about four years. After 1980, the temperature was gradually increasing. The change of precipitation was fluctuating and relatively stable. There was a main cycle of change for two years. In terms of spatial change, drought occurred in a large area of the province, and the distribution of drought showed a gradual increase from northwest to southeast. The largest number of drought days occurred in the southeast, while the number of drought days in the southwest region was small. In the seasonal variation, spring drought was more likely to occur, and the average annual drought frequency was more than 60%. The frequency of drought in summer and autumn was relatively small. The frequency of winter drought was the highest, but it had less impact on humans.

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备注/Memo

备注/Memo:
收稿日期：2019-02-28 基金项目： 国家自然科学基金项目（41776181）；江苏高校优势学科建设工程资助项目（PAPD） 作者简介：祁俊青（1994-），女，江苏盐城人，硕士研究生，主要从事气象灾害时空变化研究。(E-mail)506611948@qq.com 通讯作者：于文金, (E-mail)yuwj@nuist.edu.cn
更新日期/Last Update: 2019-06-30