摘要
为了分析城市化对北京城市热岛效应的影响程度,利用NCEP 1℃×1℃逐日再分析资料、Landsat遥感产品数据以及中尺度WRF模式,对北京城市下垫面因子的变化进行模拟。分析城市化对北京城市热岛强度的影响。结果表明:白天北京的城市、近郊、远郊存在气温的逐级递减趋势,而夜间热岛分布广且城郊温差小,城市热岛强度总体维持在1℃以上。下垫面由郊区变为城市会使当地的气温升高;并且这种升温效果在夜间比较显著。城区面积的扩张,会进一步增加城市中心区的温度。从不同年份小风区面积的变化看出,城市化在夜晚不断的加剧城市热岛效应,而白天则先增强后减弱。
In order to analysis the influence degree of the urbanization for Beijing urban heat island effect,using the NCEP 1℃ × 1 ℃ daily reanalysis data,Landsat remote sensing data products and WRF mesoscale model,the change of the underlying surface factor of Beijing is simulated,analysed the influence of the urbanization for Beijing urban heat island effect.The results show：during the day,the temperature of Beijing urban,suburban,exurban exist decreasing trend at night,and heat island wide distribution and temperature difference between urban area and suburbs is small,heat island intensity of urban remain above 1 ℃.The changed of underlying surface from suburb to city make local temperature rise,and the heating effect is significant in the night; the expansion of urban area will further increase the temperature of the areas of the city.See from different years the changes of small wind area,urbanization constantly intensifying heat island effect of urban at night,and first increase and then decrease during the day.
出处
《科学技术与工程》
北大核心
2014年第36期146-151,164,共7页
Science Technology and Engineering
基金
公益性行业(气象)科研专项(GYHY201106032-03)
国家自然科学基金项目(61375030)资助
关键词
城市热岛
WRF模式
北京城市气象
urban heat island
WRF model
Beijing city meteorological
