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新疆叶尔羌河冰川湖突发洪水对气候变化的响应
Authors
孙桂丽
李卫红
+3 more
杨余辉
汪业智
陈亚宁
Publication date
20 October 2010
Publisher
Abstract
利用1961—2008年的气象-水文资料,探讨了气候变化与叶尔羌河流域冰川湖突发洪水的关系.采用非参数Wilcoxon统计检验和Kendall的τ关联检验分析温度、降水变化与洪峰流量量变化的关联性和一致性;用Mann-Kendall法对气温、降水和洪峰流量>4000 m3.s-1突发性洪水的0℃层高度进行突变检验和趋势分析.结果表明:流域气温在1995年发生突变,且对冰川湖突发洪水发生起主导作用;降水突变不明显,对冰川湖突发洪水发生只起促进作用.自1880年以来,冰川湖突发洪水发生频率增加,与流域气温变化一致.1994年以来气温呈直线上升,洪水频率也呈显著增加趋势;冰川湖突发洪水发生频率与降水变化关系不明显;突发性洪水发生与其前8 d的0℃层高度显著上升密切相关
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Last time updated on 29/11/2016