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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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中国北方近50年温度和降水极端事件变化
DOI: 10.11821/xb20037s001, PP. 1-10
Keywords: 极端高温,极端低温,强降水,中国北方
Abstract:
利用中国近50年逐日最高、最低气温和降水资料，计算分析北方极端高温、极端低温和极端强降水事件的频率变化趋势。研究结果表明，中国北方夜间温度极端偏低的日数显著趋于变少；白天温度偏高的日数则趋于增多，只有华北南部例外。同时我国北方日最低气温小于0℃的日数显著减少，这使得我国北方，尤其是东部地区无霜期明显加长。从降水来看，华北地区强降水事件趋于减少，但西北地区强降水事件趋于增多。
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