气候变化研究进展 ›› 2016, Vol. 12 ›› Issue (4): 322-331.doi: 10.12006/j.issn.1673-1719.2015.176

• 气候变化影响 • 上一篇    下一篇

成都地区夏季城市热岛变化及其与城市发展的关系

程志刚1,杨欣悦1,孙 晨1,徐雅晋2   

  1. 1成都信息工程大学大气科学学院/高原大气与环境四川省重点实验室,成都 610225; 
    2 成都市环境监测中心站,成都 610000
  • 收稿日期:2015-10-20 修回日期:2015-12-22 出版日期:2016-07-30 发布日期:2016-07-30
  • 通讯作者: 程志刚 E-mail:chengzg@cuit.edu.cn
  • 基金资助:

    国家自然科学基金项目;四川省教育厅重点项目

The Trend of Summer Urban Heat Island Effect and Its Relationship with Urban Development in Chengdu

Cheng Zhigang1, Yang Xinyue1, Sun Chen1, Xu Yajin2   

  1. 1 College of Atmospheric Science/Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, Chengdu University of Information and Technology, Chengdu 610225, China; 
    2 Chengdu Environmental Monitoring Central Station, Chengdu 610000, China
  • Received:2015-10-20 Revised:2015-12-22 Online:2016-07-30 Published:2016-07-30

摘要:

利用2000—2010年MODIS地表温度产品影像,结合DMSP/OLS夜间灯光数据,分析了成都地区夏季城市温度场及其城市热岛变化的分布特征及其演变规律。结果表明:随着城市化加快,成都地区夏季热环境发生了较大变化,整个区域以中温区向次高温区转换为主。成都地区热岛效应昼夜变化较大:白天热岛面积不断增大,与周围卫星城热岛连成一体,2000年和2010年城市热岛对区域的增温贡献分别为0.13℃和0.29℃,变化量达0.16℃,夜间并不存在大面积强热岛区。旧城区内城市热岛面积有所增加,但不显著,城市扩展区内热岛的规模显著增大,2010年较2000年新增强热岛区域面积166.43 km2,变化幅度达54%。高城市化水平的成都市地区的日较差相对于周边低城市化水平地区明显减少。同时,城市热岛还与人口的平方根具有很好的正相关关系,成都地区非农业人口规模每增长100万人,热岛效应强度增加0.4℃。

关键词: 城市化, 城市热岛, MODIS, 夜间灯光数据

Abstract:

The spatial and temporal variation of urban heat island in summer in Chengdu have been analyzed by using MODIS land surface temperature and DMSP/OLS nighttime light imagery data. The results showed that along with the urbanization process, great changes have taken place in the thermal environment. The temperature field transferred each other and the medium temperature was mainly replaced by the sub-high temperature in the whole area. The urban heat island has a large diurnal variation, the heat island area is increasing during summer daytime in Chengdu, resulting in Chengdu and its surrounding satellite towns integral heat island become a major heat island area. The contribution to regional warming of the urban heat island in 2000 and 2010 were 0.13℃ and 0.29℃ respectively, and the variation reaches 0.16℃. However, there is no existing of a large area of strong heat island in night. Since 2000, the size of the urban heat island in the old city area showed an increasing trend, but the change is not obvious. The scale of urban expansion district heat island had significantly increased, the newly enhanced heat island area reached 166.43 km2 and changed in 54% in 2010 comparing with 2000. The decrease of daily temperature range in Chengdu which has a relatively high level of urbanization is completely attributable to the urbanization effect, indicating that changes in surface temperature and urbanization are closely related. The urban heat island and the square root of the population have a good positive correlation. In the non-agricultural population of Chengdu, every increase of 1 million persons is linked to an increase of 0.4℃ of the heat island intensity.

Key words: urbanization process, urban heat island, MODIS, DMSP/OLS

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