摘要
选用上海地区11个气象观测站建站至2006年逐日平均、最高、最低气温、水汽压、气压及相对湿度资料,分析了上海地区气温受城市化进程的影响、热岛效应的年代际演变及与之相关的极端天气事件。结果表明:上海地区城市热岛效应非常显著且范围不断扩大;近年来,年平均热岛中心有向南转移的趋势;受城市影响,中心城区高温热浪事件频发;上海地区空气水汽含量呈下降趋势,非热岛区中空气含水量下降趋势更加明显;在历年热浪事件中,平均气温的变化幅度不大,但露点温度明显下降,局地气候有"暖干"化趋势。
The influence of urbanization on the surface air temperature, and the interdecadal variability of the heat-island and the related extreme events in Shanghai are analyzed by means of the daily data such as the average, the maximum and minimum surface air temperatures, water vapor, pressure and rela- tive humidity at eleven observation stations from 1875 to 2006. The results show that the areas impacted by Shanghai urban heat-island tends to enlarge, the centre of annual mean heat-island is to shift to the - south in the recent years. Influencing by urbanization, the heat-wave events over the down-town occur more and more frequency, and the content of water vapor is getting smaller, especially in the suburb areas where has been less impacted by heat-island. The dew-point has been significantly decreased and the local climate tends to be ＂drying and warming＂ although the mean air temperature has been changed little depending on the analysis of multi-year heat-wave events.
出处
《高原气象》
CSCD
北大核心
2008年第B12期131-137,共7页
Plateau Meteorology
基金
上海市科委科研计划项目(072512021)
世界自然基金会气候变化基金共同资助
关键词
上海
城市化
高温热浪
气候变化
Shanghai
Urbanization
Heat-wave
Climate change
