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Remote Sensing for Land & Resources    2018, Vol. 30 Issue (1) : 135-143     DOI: 10.6046/gtzyyg.2018.01.19
Orginal Article |
Spatio-temporal variation of urban heat island effects in Fangchenggang City, Guangxi Zhuang Autonomous Region
Ming SUN1(), Min XIE2(), Meihua DING1, Wenlong XU3, Siqi HUANG4, Fei GAO5
1. Guangxi Meteorological Disaster Mitigation Institute/Remote Sensing Application and Validation Base of National Satellite Meteorological Center, Nanning 530022,China
2. Guangxi Climate Center, Nanning 530022,China
3. Fangchenggang Meteorological Bureau, Fangchenggang 538001, China
4. School of Geography and Remote Sensing, Nanjing University of Information & Technology, Nanjing 210044, China;
5. Flood Control and Drought Relief Office of Jiangsu Province, Nanjing 210029, China
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Abstract  

To study the spatio-temporal variation of urban heat island effects in Fangchenggang City from 2001 to 2015,the authors used the remote sensing methods to monitor the variation characteristics of urban heat island effects in Fangchenggang City for a period of 15 years. The land surface temperature(LST)was retrieved using remote sensing images(Landsat5 TM and Landsat8 OLI) acquired in three periods of 2001, 2008 and 2015. Then, both urban heat island intensity and urban-heat-island ratio index were constructed to analyze the evolution characteristics of heat island effect in the past 15 years from three aspects: the space-time distribution and area variation of heat island intensity, the development characteristics of urban-heat-island ratio index and the influence of underlying surface condition on heat island effect. Some conclusions have been reached: ① Urban area exhibits a trend of rapid expansion in the study area. ② The urban heat island intensity increases year by year, especially in Gangkou District, where annual growth rate reaches 26.72%. ③ The urban-heat-island ratio index is rising year by year in all districts, among which, Dongxing reaches the highest value of 0.62. ④ Cooling effects are obviously for both urban green space and water body, but the operating distance and cooling amplitude of water body are larger than those of green space. However, the proportion of urban vegetation and water of the study area is markedly low. The research results may provide scientific and reasonable proposals for Fangchenggang government's aim of reaching the goal of creating a national garden city.
Keywords Fangchenggang      land surface temperature(LST)      heat island intensity      urban-heat-island ratio index     
:  TP79  
Issue Date: 08 February 2018
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Ming SUN
Min XIE
Meihua DING
Wenlong XU
Siqi HUANG
Fei GAO
Cite this article:   
Ming SUN,Min XIE,Meihua DING, et al. Spatio-temporal variation of urban heat island effects in Fangchenggang City, Guangxi Zhuang Autonomous Region[J]. Remote Sensing for Land & Resources, 2018, 30(1): 135-143.
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https://www.gtzyyg.com/EN/10.6046/gtzyyg.2018.01.19     OR     https://www.gtzyyg.com/EN/Y2018/V30/I1/135
Fig.1  Sketch map for location of research region
成像日期 τ Latm↑ Latm↓
20011117 0.86 1.00 1.66
20081120 0.70 2.08 3.24
20151023 0.67 2.82 4.42
Tab.1  Atmospheric parameters of land surface temperature inversion
等级 UHI /℃ 等级定义
1 [-1.0,1.0) 无热岛
2 [1.0,3.0) 弱热岛
3 [3.0,5.0) 较强热岛
4 ≥5.0 强热岛
Tab.2  Grade division of heat island intensity in Fangchenggang City
Fig.2  Distribution of built-up area in different districts of Fangchenggang City from 2001 to 2015
Fig.3  Distribution of heat island intensity in Fangcheng and Gangkou districts from 2001 to 2015
Fig.4  Distribution of heat island intensity in Dongxing City from 2001 to 2015
Fig.5  Distribution of heat island intensity in Shangsi County from 2001 to 2015
Fig.6  Diagram of urban-heat-island ratio index in Fangchenggang City from 2001 to 2015
Fig.7  Scatter diagrams between urban land, vegetation, water and LST
距离/m 桃花湖公园水体 大尖峰绿地
LST/℃ 温度差/℃ LST/℃ 温度差/℃
30 30.99 2.49 31.70 1.90
60 33.21 2.22 33.50 1.80
90 34.62 1.41 33.80 0.30
120 35.87 1.25 34.06 0.26
150 36.68 0.81 34.02 -0.04
180 36.80 0.12 34.01 -0.01
210 36.43 -0.37 — —
240 36.21 -0.22 — —
Tab.3  LST and temperature difference in different buffers of green land and water body
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