南京大学学报(自然科学版) ›› 2016, Vol. 52 ›› Issue (6): 1016.
姚 帅1,2,3,蒋德海1,张艳霞1,李 菲1,邓雪娇1,2 *,王宝民2*
Yao Shuai1,2,3,Jiang Dehai1,Zhang Yanxia1,Li Fei1,Deng Xuejiao1,2 *,Wang Baomin2*
摘要: 利用城市冠层加强观测资料对GRAPESUCM模式进行了多个例的模拟分析与效果检验,表明:城市冠层效应使城市平均气温升高1.2 ℃,感热通量增加163%,热岛效应增强近1.3 ℃;城区风速减小16%,而风速的脉动增大;GRAPESUCM模式对城市地表温度、风速、向下短波辐射、向上长波辐射、感热通量等的模拟结果与实际观测更为接近.近地面静小风、稳定的近地面层结(逆温)及风向的辐合导致污染物的局地堆积,容易造成高PM2.5浓度与低能见度的灰霾天气;与台风外围下沉气流相联系的高温有利于高臭氧事件的发生.城市冠层模式的引入对GRAPES模式在城市下垫面的模拟效果有显著的提升作用,能更好模拟出不利于污染物扩散的气象条件.
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