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丁文荣, 曾学梅.云南岩溶区降水变化的气候特征水资源与水工程学报[J].,2019,30(1):7-12
云南岩溶区降水变化的气候特征
Analysis on the climatic characteristics of the precipitation variations of karst area in Yunnan province, Southwest China
  
DOI:10.11705/j.issn.1672-643X.2019.01.02
中文关键词:  降水变化  最长持续干旱时间  最长持续降水时间  气候特征  岩溶区  云南省
英文关键词:precipitation change  consecutive dry days  consecutive wet days  climate characteristics  karst area  Yunnan Province
基金项目:国家自然科学基金项目(41761105)
作者单位
丁文荣, 曾学梅 (云南师范大学 旅游与地理科学学院 云南 昆明 650500) 
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中文摘要:
      岩溶区面临严峻的水资源形势,为解释云南省岩溶区近60年来降水的历史变化特征并服务现今的水资源管理,以云南省5个岩溶片区1959-2017年的逐日降水量数据为基础,采用线性倾向估计法和Mann-Kendall非秩次检验法,系统性研究了云南岩溶区降水变化特征。结果表明:自1959年以来,云南省5个岩溶片区的降水量均呈现出减少的趋势,其中滇中和滇东南的减少最为明显,但均未达到0.05的显著性水平;云南岩溶区降水日数均呈现出减少的倾向,其中滇西、滇中、滇东南片区的减少趋势达到0.05置信水平,其余区域不明显;小降水级别的降水量在云南岩溶区呈减少态势,而大降水级别的降水量则有所增加;5个岩溶区多年平均最长干旱时间的变化存在较大的区域差异,其中滇西北、滇西、滇东北和滇东南片区的最长持续干旱时间均有所增加,而滇中则呈现为减少趋势;云南5个岩溶片区的平均最长持续降水时间均呈现出减少趋势,其中滇东北片区的减少趋势变化显著。降水的这些变化趋势给岩溶区水资源利用与生态环境保护提出了新的挑战。
英文摘要:
      Shortage in water resources is a serious problem in karst areas. Based on the daily precipitation data of five karst regions in Yunnan Province between 1959 and 2017,the precipitation changes in Yunnan karst area were systematically revealed using the trend analysis and Mann-Kendall non rank test. The results are as follows: Since 1959, the precipitation in the studied five karst regions in Yunnan Province shown a decreasing trend, and the decreases in central Yunnan and Southeast Yunnan were more obvious, but did not reach the 0.05 significant level. In recent years, the number of precipitation days in Yunnan karst area has shown a decreasing trend, of which the decrease trend of the western Yunnan, Central Yunnan and southeastern Yunnan was 0.05 confidence level, but the other areas were not obvious. The precipitation of small precipitation level in Yunnan karst area showed a decreasing trend, whereas the precipitation at heavy precipitation level shown an increasing trend. The variation of the longest drought time in the five karst regions of Yunnan has great regional differences. The longest consecutive dry days in Northwest Yunnan, western Yunnan, Northeast Yunnan and Southeast Yunnan shows an increasing trend, but in the Middle Yunnan, the trend of decreasing is significant. The average consecutive wet days decreased in all of the five karst regions of Yunnan, but the trend were not obvious except for the Northeast Yunnan.
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