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Drought Disaster and Climatic Change During Ming Dynasty in Yan'an Area(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2010年第04期
Page:
430-435
Research Field:
水资源与环境
Publishing date:

Info

Title:
Drought Disaster and Climatic Change During Ming Dynasty in Yan'an Area
Author(s):
ZHAO Jing-bo1; 2;  ZHANG Chong2
(1.Key Laboratory of Disaster Monitoring and Mechanism Simulating of Shaanxi Province, Baoji University of Arts and Sciences, Baoji 721007, Shaanxi, China; 2.School of Tourism and Environment, Shaanxi Normal University, Xi'an 710062, Shaanxi, China)
Keywords:
drought disaster;  extremely dry climate;  precipitation;  grade;  Ming Dynasty;  Yan'an Area
PACS:
P532
DOI:
-
Abstract:
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 high frequency of both great and serious drought disasters was the outstanding feature of the climate during Ming Dynasty in Yan'an Area, and indicated the climate was arid as a whole. The distribution of drought disasters in Yan'an Area during the Ming Dynasty 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 significant dynamics of frequency of drought disasters among the four stages 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.

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Last Update: 2010-12-20