Analysis of spatiotemporal evolution and influencing factors of heat island effect in Hefei based on satellite data

ZHAO Qiang; TAN Lu; FANG Qiansheng; LIU Changyu; MA Ke; ZHU Shuguang

doi:10.3969/j.issn.1673-6141.2023.02.007

Journal of Atmospheric and Environmental Optics, Volume. 18, Issue 2, 153(2023)

Analysis of spatiotemporal evolution and influencing factors of heat island effect in Hefei based on satellite data

ZHAO Qiang1...2, TAN Lu1,*, FANG Qiansheng1,2, LIU Changyu1, MA Ke1, and ZHU Shuguang12 |Show fewer author(s)

Author Affiliations

¹School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China

²Anhui Institute of Carbon Emission Peak and Carbon Neutrality in Urban-Rural Development, Hefei 230601, China

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Figures & Tables(16)

Fig. 1. Administrative division map of main urban area of Hefei

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Fig. 2. Technical roadmap for research on Hefei heat island effect and its influencing factors

Fig. 5. Kernel density distribution map of Hefei industrial zone in 2020

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Fig. 6. Development trend and centroid transfer of heat island in Hefei in 2005, 2009, 2015 and 2020

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Fig. 7. GWR analysis results of Hefei heat island effect and its influencing factors in 2015. (a) R²; (b) NDBBI coefficient;(c) PD coefficient; (d) FVC coefficient; (e) MNDWI coefficient

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Table 1. Data source and purpose

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Table 1. Data source and purpose

Data serie

Data name

Data Source

Purpose

Time

Remote sensing data

Landsat 5 TM, Landsat 8 OLI TIRS

https://earthexplorer.

usgs.gov

Retrieve surface temperature and extract surface information

2005-10-31,

2009-10-26,

2015-10-15,

2020-10-24,

Vector data

Vector data of the administrative boundary of the main

urban area of Hefei

http://www.geodata.cn

Extract the boundary of the study area

2016

Population density

Hefei population density

http://www.resdc.cn

Provide population density data

2015

Table 2. Transfer area land use in Hefei from 2005 to 2009 (km²)
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Table 2. Transfer area land use in Hefei from 2005 to 2009 (km²)
Water Urban land Vegetation Bare ground/arable land
Water 92.69 1.04 4.14 0.20
Urban land 2.53 65.88 14.02 6.15
Vegetation 3.03 7.31 42.88 7.88
Bare ground/arable land 1.72 25.73 38.86 85.73

Table 3. Transfer area land use in Hefei from 2009 to 2020 (km²)
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Table 3. Transfer area land use in Hefei from 2009 to 2020 (km²)
Water Urban land Vegetation Bare ground/arable land
Water 93.96 0.89 2.93 0.30
Urban land 4.40 90.72 38.59 23.85
Vegetation 1.13 2.62 32.16 16.89
Bare ground/arable land 0.47 5.74 26.22 58.90

Table 4. Transfer area of heat island in Hefei from 2005 to 2009 (km²)

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Table 4. Transfer area of heat island in Hefei from 2005 to 2009 (km²)

	Cold island region	Secondary heat island region	Heat island region	Intense heat island region
Cold island region	96.58	17.36	2.95	0.64
Secondary heat island region	3.32	70.22	34.10	1.50
Heat island region	0.08	12.38	62.11	41.37
Intense heat island region	0.00	0.02	0.81	56.46

Table 5. Transfer area of heat island in Hefei from 2009 to 2015 (km²)

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Table 5. Transfer area of heat island in Hefei from 2009 to 2015 (km²)

	Cold island region	Secondary heat island region	Heat island region	Intense heat island region
Cold island region	93.74	25.32	12.56	0.37
Secondary heat island region	5.89	68.90	66.64	1.12
Heat island region	0.30	5.44	18.25	9.33
Intense heat island region	0.06	0.32	2.53	89.16

Table 6. Transfer area of heat island in Hefei from 2015 to 2020 (km²)

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Table 6. Transfer area of heat island in Hefei from 2015 to 2020 (km²)

	Cold island region	Secondary heat island region	Heat island region	Intense heat island region
Cold island region	89.01	16.85	3.74	0.11
Secondary heat island region	10.65	74.54	44.77	3.99
Heat island region	0.31	8.36	42.41	11.38
Intense heat island region	0.02	0.24	9.06	84.51

Table 7. Area change of the affected districts and intense heat island districts of Hefei in 2005，2009，2015，and 2020 (km²)
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Table 7. Area change of the affected districts and intense heat island districts of Hefei in 2005，2009，2015，and 2020 (km²)
2005 2009 2015 2020
Affected area 1066 938.1 824 891.7
Intense heat island region 0.83 0.96 8.17 15.87

Table 8. Result of Geoprobe
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Table 8. Result of Geoprobe
Impact factor NDBBI PD MNDWI FVC
q 0.542 0.018 0.409 0.379

Table 9. Analysis of the correlation between factors and surface temperature
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Table 9. Analysis of the correlation between factors and surface temperature
Impact factor NDBBI MNDWI FVC PD
Pearson
coefficient
0.754^** -0.575^** -0.259^** 0.07^*

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Qiang ZHAO, Lu TAN, Qiansheng FANG, Changyu LIU, Ke MA, Shuguang ZHU. Analysis of spatiotemporal evolution and influencing factors of heat island effect in Hefei based on satellite data[J]. Journal of Atmospheric and Environmental Optics, 2023, 18(2): 153

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