| 摘要: |
| 为揭示贵阳市城市热岛效应时空变化规律，利用2003—2019年的MODIS地表温度产品（MYD11A2），获取贵阳市长时间序列地表温度，结合3S技术对地表温度进行局地热岛强度计算，划分城市热岛强度等级，并从年代际、年际、季节变化以及日时间尺度对贵阳市城市热岛变化的分布特征及其演变规律进行分析。结果表明：①2003—2019年贵阳市城市热岛效应总体呈增强趋势，且在2012年发生突变现象，此后热岛效应更加显著，出现强热岛区，中热岛以上区域面积扩大；②贵阳市2003、2004、2005、2008年为热岛强度偏弱年，2016—2019年为热岛强度偏强年，偏弱年和偏强年热岛强度空间分布与突变前后相似，热岛区面积比例整体变化不大，偏强年除弱热岛区面积比例变小外，其他各热岛等级面积均增加；③贵阳市城市热岛效应夏季最强，其次是春季和冬季，秋季最弱。就空间分布而言，贵阳市城市热岛区在秋、冬季分布较分散，而在春、夏季分布较为集中；④城市热岛区主要集中在主城区，夜晚相比于白天分布更为集中，且热岛效应夜晚强于白天。 |
| 关键词: 城市热岛效应；时空特征；MODIS；贵阳市 |
| DOI： |
| 投稿时间：2020-04-22 |
| 基金项目:贵州省气象局登记项目（黔气科登[2019]04-02号）：卫星遥感产品在气候监测业务中的应用 |
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| Spatial and Temporal Characteristics of Urban Heat Island in Guiyang Based on MODIS |
| LUO Yanghuan,BAI Hui,SHUAI Shizhang,LI Xiao,DING Liguo |
| (Guizhou Climate Center, Guiyang 550002 , China;Guizhou Institute of Mountainous Environment and Climate, Guiyang 550002 , China) |
| Abstract: |
| In order to reveal the temporal and spatial variation of urban heat island effect in Guiyang, the MODIS surface temperature product (MYD11A2) from 2003 to 2019 was used to obtain the long-term series surface temperature of Guiyang. Combined with 3S technology, the intensity of local urban heat island is calculated for surface temperature, and the intensity grade of urban heat island is divided. Besides, the research analyzes the distribution characteristics and evolution rules of urban heat island change in Guiyang from interdecadal, interannual, seasonal and daily time scales. The research results are as follows: ①The urban heat island effect of Guiyang in 2003-2019 shows an increasing trend, and a sudden change occurred in 2012. Since then, the heat island effect has become more significant, with the emergence of strong heat island areas and the expansion of the area above the middle heat island. ②In 2003, 2004, 2005 and 2008, the intensity of heat island in Guiyang city was weak, and in 2016-2019, the intensity of heat island was strong. The spatial distribution of heat island intensity in weak and strong years was similar to that before and after the mutation. The proportion of heat island area changed little as a whole. In the strong years, except for the proportion of the area in weak heat island, the area of other heat island grades increased. ③The urban heat island effect of Guiyang is the strongest in summer, followed by spring and winter, and the weakest in autumn. In terms of spatial distribution, the distribution of urban heat island area in Guiyang is scattered in autumn and winter, but concentrated in spring and summer. ④The urban heat island is mainly concentrated in the main urban area, and the distribution is more concentrated at night than in the daytime. Besides, the heat island effect is stronger at night than in the daytime. |
| Key words: urban heat island effect；temporal and spatial characteristics；MODIS；Guiyang |
