| 摘要: |
| 利用济南和威海成山头一年1951～2006年的冬季气温的观测资料, 用MHF(墨西哥帽函数)小波分析了两地冬季气温的多时间尺度变化特征并对两地出现的极端气候进行了一定分析。结果表明近60年来,济南冬季年平均气温（0.82℃）比威海成山头冬季年平均气温（0.53℃）高, 济南和威海成山头两地冬季气温倾向率分别为0.431℃/10a和0.359℃/10a；两地在较大时间尺度上, 突变点位置比较接近, 在较小时间尺度上, 演变略有差异, 济南冬季气温变化比威海成山头略快在振动周期上, 济南的冬季平均气温变化以5 |
| 关键词: 冬季气温 气候倾向率 MHF小波 气候变化 |
| DOI： |
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| 基金项目:中国博十后科学基金项目（20070421132）；二峡大学资助项目（2007KF12) |
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| Wavelet analysis of variations of recent 60 years winter temperatures in Jinan and Weihai Chengshantou |
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| Abstract: |
| Based on the monthly mean winter temperature data from 1951 to 2006 of Jinan and Chengshantou climate-stations.The multi-time scales characteristics of winter temperature and the extreme climate had been analyzed using MHF(Mxican Hat Function).It was shown that the average temperature in winter of Jinan (0.82 ℃) was higher than that in Chengshantou (0.53℃);in recent 60 years,the tend-rates of winter temperature in Jinan and Chengshantou were 0.431℃/10 a and 0.359℃/10 arespectively;the mutation positions were chosen to each other in larger time scales;in smaller time scales,the evolution showed some sightly differences;the winter temperature changes of Jinan was slightly faster than that of Chengshantou;5 a,18 a period-oscillation of winter temperature variations in Jinan is the strongest,and 4 a,18 a period-oscillation of summer precipitation variations in Chengshantou is the strongest;in the coming period,winter temperatures of the two places may still be high,but have a lowering trend;throughout the whole time,the extreme weather contains obvious staggered features;the extreme weather in Chengshantou was even worse than in Jinan. |
| Key words: winter temperature climate tend-rate. MHF wavelet climate variation |
