浙江东部海岛气温变化特征及与相邻城市站对比
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Air temperature variation in the eastern islands of Zhejiang and comparison with neighboring urban stations
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    摘要:

    利用浙江省东部海岛站和相邻城市站1971-2015年气温资料,通过计算线性倾向率、M-K突变检验以及数理统计方法,研究了海岛地区气温变化特征以及和相邻城市站气温变化的异同,并以海岛站为背景站分析了城市化对城市气温变化的影响性质和程度.结果发现:1)海岛地区1971-2015年间平均气温及平均最高、最低气温都存在明显的升温趋势,其线性倾向率分别为0.029、0.033和0.028℃/a,变暖幅度明显小于相邻城市站;春、秋季是四季中变暖幅度最大的季节,其次是冬季,夏季最弱,尤其北部海岛夏季没有明显的变化趋势.2)海岛站气温变暖是一种突变现象,平均最高气温发生突变时间最早,平均最低气温最晚;相邻城市站突变时间多早于海岛站,城市站最高气温没有明显的突变现象.3)以海岛作背景,城市化对于城市站年平均气温,最高、最低气温变化的影响均为正贡献,加速了气温的变暖趋势,除温州外对四季气温的贡献率也均为增温趋势,贡献率最高的季节为夏季.

    Abstract:

    Based on air temperature data from 1971 to 2015,the difference in annual and seasonal air temperature variation trends between four island stations and nearby urban stations in eastern Zhejiang Province was investigated,by using linear-trend estimate,the least square methods,M-K tests,and mathematical statistics method.The effect of urbanization on the variation trends of the mean annual,maximum and minimum temperatures and the asymmetrical change of air temperature were also analyzed with the island stations as the background field.Results show that the temperatures have been in an increasing trend in recent 45 years in island stations,with linear trend rate of 0.3℃/(10 a),but the warming rate is obviously smaller than that of the urban stations.The warming intensity is strongest in spring and autumn,followed by winter,and weakest in summer,especially summer in the northern islands.The temperature increase in island stations is an abrupt change,which occurs early for mean maximum and late for mean minimum temperature.The abrupt temperature change time of city station is earlier than that of island stations,and there was no mutation occurring in the maximum temperature of city stations.Taking the island station temperature as background,results show that the urbanization has positive effect on the mean,maximum and minimum air temperature,thus speed up the warming trend at both yearly and seasonal level.

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李云,钱燕珍.浙江东部海岛气温变化特征及与相邻城市站对比[J].南京信息工程大学学报(自然科学版),2018,10(5):641-646
LI Yun, QIAN Yanzhen. Air temperature variation in the eastern islands of Zhejiang and comparison with neighboring urban stations[J]. Journal of Nanjing University of Information Science & Technology, 2018,10(5):641-646

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  • 收稿日期:2016-08-06
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  • 在线发布日期: 2018-11-02
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