Drought Disaster and Climatic Change During Ming Dynasty in Yan’an Area
详细信息
- 责任者：Zhao Jingbo (Key Laboratory of Disaster Monitoring and Mechanism Simulating of Shaanxi Province ; Baoji University of Arts and Sciences ; Baoji 721007 ; China) ; Zhang Chong
- 刊名：Journal of Earth Sciences and Environment
- 出版年：2010
- 卷期：32(4)
- 关键词：干旱 ; drought ; 全球变化 ; global change ; 陕西 ; Shaanxi Province
- 页码：p.430-435
- 图表：4 illus., 24 refs.
- 分类号：1800
- issnNo：ISSN1672-6561
- isbnNo：CN61-1423/P
摘要
Based on a compilation of historical data of drought disasters in Yan’an Area during Ming Dynasty (1368-1644), the temporal change, level and reason of drought disasters were analyzed. The results showed that during 277 years of Ming Dynasty, the drought disasters happened 91 times in Yan’an Area, with average once every 3 years. The drought disaster happened 17, 30, 29 and 15 times for mild, middle, great and serious levels, respectively. The distribution of drought disasters could be divided into four stages: from 1368 to 1420 with low frequency of drought disasters (the first stage); from 1421 to 1520 with high frequency of drought disasters (the second stage); from 1521 to 1617 with low frequency of drought disasters (the third stage); from 1618 to 1644 with high frequency of drought disasters (the forth stage). The results indicated that the climate in the second and fourth stages were obviously drier with decreased precipitation. In the second and fourth stages, there were two sub-stages of extremely dry climate (1480-1499, 1626-1641), in which the precipitation was 200 mm less than that in nowadays.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |