近30年城市化对北京极端温度的影响

被引:30
作者
王君 [1 ]
严中伟 [1 ]
李珍 [1 ]
刘伟东 [2 ]
王迎春 [2 ]
机构
[1] 中国科学院东亚区域气候-环境重点实验室
[2] 北京市气象局
关键词
城市化效应; 气候变暖; 极端温度; 聚类分析; 夜光指数;
D O I
暂无
中图分类号
P468.02 [];
学科分类号
0706 ; 070601 ;
摘要
基于1978~2008年北京地区20站均一化逐日气温资料,评估了城市化对温度和极端温度变化的影响.与以往研究不同,此研究采用聚类分析,客观地将观测站点分为4类(城市站、近郊站、乡村站和山地站),并利用遥感夜晚灯光数据验证了分类结果的合理性.近30年来,城市化所致城市热岛增强的效应对城市站点平均气温增温趋势的贡献为10.9%(影响最大的站点该贡献达18.4%或0.12℃/10 a),对最低气温增温趋势的贡献为12.7%(影响最大的站点该贡献达20.8%或0.19℃/10 a),对温度日较差下降趋势的贡献为24%(影响最大的站点该贡献达37.4%或0.15℃/10 a).城市化效应对城市站点最高温度影响较小,但对极端暖夜(冷夜)的增加(减少)趋势贡献为12.7%或2.07 d/10 a(29.0%或5.06 d/10 a).
引用
收藏
页码:3464 / 3470
页数:7
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