论文部分内容阅读
以南京大学区域边界层模式(RBLM)为工具,利用银川国家基准气候站地面和探空观测数据,模拟了银川市四季3种典型风速天气条件下城市规划前后大气温度场,结果表明:现状下,夏季,小风和大风情景下高温区域面积大于一般风情景下;冬季,小风情景下高温面积最大,大风情景下高温区域面积最小;春季一般风情景下高温面积最大;秋季一般风情景下高温区域面积最大。银川市四季城市热岛效应表现均很显著,四季日变化表现为夜间水域附近的温度较城区建设用地高,白天尤其是14:00,城区建设用地温度较水域附近温度高。14:00在城市建设用地密集区域气温较高,且城市建设越密集气温越高,仅在冬季小风日和春季大风日表现得较弱。城市规划后,温度场在3种典型天气条件下分布特征与现状下分布规律总体趋于一致,只是高温区域较之前略小,低温区域较之前略大。城市规划后,3种典型天气条件下热岛面积均小于规划前,城市热岛效应减弱。
Taking the regional boundary layer model (RBLM) of Nanjing University as a tool, the ground temperature and sounding observation data of Yinchuan National Reference Station were used to simulate the atmospheric temperature before and after the urban planning in three typical wind speeds in Yinchuan during the four seasons. The results show that: , The area of high temperature in summer, small winds and strong winds is larger than that of general winds; in winter, the area of high temperature in the small winds is the largest, and the area in the high temperature area is the smallest in windy scenarios; High temperature area is the largest. Yinchuan City, the four seasons urban heat island effect is significant, the diurnal variation of the performance of the nighttime waters near the urban construction land temperature higher than the daytime, especially 14:00, urban construction land temperature higher than the temperature near the waters. 14:00 In cities with densely populated urban areas where the temperature is high and the more densely populated cities are, the higher the temperature, the weaker ones only appear on the winter windy days and the spring windy days. After urban planning, the distribution of temperature field under the three typical weather conditions tends to be consistent with the current situation, except that the high temperature region is slightly smaller than before, and the low temperature region is slightly larger than before. After urban planning, the heat island area under the three typical weather conditions is less than before planning, and the urban heat island effect is weakened.