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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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中国北方地区霜冻日的变化与区域增暖相互关系
DOI: 10.11821/xb20037s004, PP. 31-37
Keywords: 霜冻日,气候变化,区域增暖,温度,中国
Abstract:
从中国北方62个站的日平均温度出发，分析北方1951~2000年有霜冻(温度在零度以下)日数和强度的变化趋势；同时给出了秋冬交替时霜冻日开始日期和冬春转换时霜冻日结束日期的变化趋势。结果指出在中国北方(30oN以北)，有霜冻日的日数在近50年有明显的减少趋势，而霜冻日的平均温度显著升高；春季霜冻日的提前结束和秋季霜冻日的推迟来临使得北方冬季缩短而生长季拉长。年霜冻日平均温度与年平均温度存在显著的正相关关系，而无霜冻日温度的年平均值与平均温度关系达不到信度检验。这预示着区域温度的增暖主要体现在霜冻日温度的变化。
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