半干旱区典型工业城市热岛时空分布及演变特征——以包头市为例

摘要/Abstract

摘要： 基于2000 年、2008 年和2015 年landsat5 TM影像和Landsat8 OLI影像，以单窗算法反演地表温度，研究包头市区近15 a 的城市热岛时空分布及演变特征，并对下垫面土地利用/覆盖类型、 NDVI 与城市热岛的关系进行了定量分析。研究结论表明：包头城市热岛15 a 来呈逐步扩展趋势，且主要集中于裸地区、工矿区、商业和人口密集区三类区域，空间演变趋势与城市扩张格局呈现出高度的一致性；城市热岛效应强度增强，但2008-2015 年以来，市中心区高温区面积比重大大降低；下垫面土地利用/覆盖类型是影响城市热岛空间分布的重要因子，地表温度呈现出裸地>工矿用地>建设用地>城市绿地>农用地>水体的规律；地表温度与 NDVI 呈现显著的负相关关系，即植被指数越高，城市的地表温度越低。

关键词: 城市热岛, 单窗算法, 时空演变, 工业城市, 包头

Abstract: Urban Heat Island(UHI)has become a key factor in deteriorating the urban ecological environment. Studying spatio-temporal evolution and the cause of typical area's UHI and quantitatively evaluating the urban heat environment effect caused by rapid urbanization will be conducive to relieve UHI effect and beneficial for urban ecological environment planning. Based on Landsat5 TM and Landsat8 OLI images of Baotou City, Inner Mongolia, China in 2000, 2008 and 2015, this paper retrieved the land surface temperature(LST)of Baotou City by mono-window algorithm, and analyzed the spatio-temporal pattern and evolution characteristics of UHI in Baotou City during the last decade, results show as follows:(1)the urban heat island in Baotou was expanding gradually and mainly concentrated in the bare areas, mining areas, city commercial and densely populated area; the spatial pattern of evolution and the expansion of urban were of high consistency; (2)urban heat island effect intensified, but the high temperature area in downtown was greatly reduced from 2008 to 2015; (3)land use type of underlying surface was an important factor to affect the spatial distribution of urban heat island in Baotou; the land surface temperature differed as fellows:bare land >industrial and mining land >construction land >green land >water; (4)the land surface temperature and NDVI showed significant negative correlation, the higher the vegetation index was, the lower the land surface temperature of the city was.

Key words: Urban Heat Island(UHI), mono-window algorithm, spatio-temporal evolution, industrial city, Baotou City

中图分类号:

P423.3

庄元, 薛东前, 王剑. 半干旱区典型工业城市热岛时空分布及演变特征——以包头市为例[J]. 干旱区地理, 2017, 40(2): 276-283.

ZHUANG Yuan, XUE Dong-qian, WANG Jian. Spatial-temporal evolution of urban heat island in semiarid typical industrial city:a case of Baotou City[J]. , 2017, 40(2): 276-283.

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