| 近五十年云南5月降水特性分析 |
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| 引用本文： | 梁家昌,沈才明.近五十年云南5月降水特性分析[J].黑龙江农业科学,2016(9):24-29. |
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| 作者姓名： | 梁家昌 沈才明 |
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| 作者单位： | 云南师范大学旅游与地理科学学院/高原湖泊生态与全球变化重点实验室/高原地理过程与环境云南省重点实验室,云南呈贡,650500 |
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| 基金项目： | 云南省高端科技人才引进资助项目(2013 HA024)；国家自然科学基金资助项目(41372191)；云南省科技计划重点资助项目(2014FA005) |
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| 摘 要： | 基于云南36站逐日降水资料,运用趋势分析和Mann-Kendall气候突变检验等方法,研究了近50年云南5月降水及其降水特性的长期趋势和年代际特征。结果表明:5月降水量出现大范围不显著增加趋势,西北部降水增加趋势显著,雨强空间变化是影响5月降水量空间变化的主要原因;5月降水量呈线性增加趋势,增加速率为4mm·(10a)~(-1),雨日和雨强变化均对5月降水量有重要贡献;5月降水量及雨日序列未发生年代际突变,但雨强在1999年前后发生了年代际突变,突变后雨强迅速增强。
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| 关 键 词： | 降水特性 M-K突变检验 5月 雨日 |
Analysis on Rainfall Characteristics in May of Yunnan During 1959-2012 |
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| Abstract: | Based on the daily precipitation data from 36 stations ,by means of linear trend estimate and Mann‐Kendall test method ,the long‐term trends and inter‐decadal variation of precipitation ,wet days and rainfall in‐tensity in May in Yunnan nearly 54 years were analyzed .The results showed that the rainfall in large areas had no significantly increasing trend .May rainfall had obvious increasing trend in northwestern Yunnan .Rainfall in‐tensity change was the main reason in May spatial variation of rainfall ;May rainfall was slowly for increasing trend ,the increase rate of 4 mm·(10 a)‐1 ,wet days and rain intensity variation rainfall on May were an impor‐tant contribution .The Mann‐Kendall tests showed that rainfall and wet days did not happen decadal mutation , but the rain intensity had a significant decadal shifts in 1999 ,after the rain intensity was rapidly increasing . |
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| Keywords: | precipitation characteristics Mann-Kendall test May wet days |
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