We examined the spatial and temporal characteristics of tropical nights (TNs) in Seoul to determine whether land use factors increase the frequency of TN. The number of TN was derived using data from 23 Automatic Weathering Stations (AWS) in Seoul for 1998–2006, and 26 AWS in Seoul and nine Gangnam-gu stations for 2007–2013. The results show that the number of TN recorded in the Seoul Automatic Synoptic Observation System (ASOS) gradually increased from 1971 to 2013. TN occurred most frequently in early August, followed by mid-August, late July, late August, mid-July, early July, early September, and mid-September. The largest annual average difference occurred between Gangnam Station and Yeomgokdong, in spite of the short physical distance (4.5 km) between two stations at Gangnam-gu. There were more TNs at high-rise buildings and commercial business district (CBD) areas with low sky view factors (SVF) than in mountain foothill areas.

我们研究了首尔热带夜晚（TNs）的时空特征，以确定土地利用因素是否会增加TN的频率。TN的数量是使用1998-2006年汉城的23个自动气象站（AWS），2007-2013年汉城的26个AWS和江南区的9个站的数据得出的。结果表明，从1971年到2013年，首尔自动天气观测系统（ASOS）记录的TN数量逐渐增加。TN的发生频率最高，发生在8月初，其次是8月中旬，7月下旬，8月下旬，7月中旬， 7月初，9月初和9月中旬。尽管江南区的两个气象站之间的物理距离很短（4.5 km），但江南气象站和Yeomgokdong之间的年平均差异最大。