Dynamics of green spaces- Land surface temperature intensity nexus in cities of Ethiopia
In this study, the dynamics of green spaces and land surface temperature patterns in four cities in Ethiopia were investigated using Landsat imagery. The typical characteristics of LST over the past three decades (1990–2020) in relation to green space dynamics were first investigated; subsequently,...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-02-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844023004814 |
| _version_ | 1811161763098394624 |
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| author | Mekonnen Amberber Degefu Mekuria Argaw Gudina Legese Feyisa Sileshi Degefa |
| author_facet | Mekonnen Amberber Degefu Mekuria Argaw Gudina Legese Feyisa Sileshi Degefa |
| author_sort | Mekonnen Amberber Degefu |
| collection | DOAJ |
| description | In this study, the dynamics of green spaces and land surface temperature patterns in four cities in Ethiopia were investigated using Landsat imagery. The typical characteristics of LST over the past three decades (1990–2020) in relation to green space dynamics were first investigated; subsequently, the spatial distribution of LST was characterized based on hybrid geospatial techniques and mono-window algorithm analysis, in which the contributions of green spaces to LST were studied. In addition, the multiple linear regression method and spatial regression models (SRMs) were employed to investigate and predict the spatial dependence of LST and urbanization-induced green space dynamics. Results show that cities horizontally expanded unceasingly from 1990 to 2020, with a substantial discrepancy in expansion rates and the spatial patterns of UHI intensities among the cities (p < 0.05). Moreover, the area proportion of the UHI is significantly larger than that of the UGS, and the differences in the UGS cooling contribution were found in different land uses and zones of the cities. In the study periods, the spatial pattern of LST was significantly controlled by NDBI, and its coefficient in the OLS followed the pattern NDVI > MNDWI > latitudes > longitudes > population density > DEM. Due to the large proportions of buildings While green land and water bodies show significant capability to mitigate UHI effects, cooling effects are not apparent when their sizes are small. Besides, the SRMs show that UHI intensities were significantly influenced by MNDWI in Bahir Dar and Hawassa (p < 0.01).Cities' LAMBDA coefficients have a positive relationship with UHII (p < 0.01). Our study could help city planners and the government understand the current cooling potential of existing UGS to mitigate the dynamics of UHI and sustain the sustainability of green space management in cities. |
| first_indexed | 2024-04-10T06:20:29Z |
| format | Article |
| id | doaj.art-4f69fd8466ac4adeb1fffb551ddd41fb |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-04-10T06:20:29Z |
| publishDate | 2023-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-4f69fd8466ac4adeb1fffb551ddd41fb2023-03-02T05:00:45ZengElsevierHeliyon2405-84402023-02-0192e13274Dynamics of green spaces- Land surface temperature intensity nexus in cities of EthiopiaMekonnen Amberber Degefu0Mekuria Argaw1Gudina Legese Feyisa2Sileshi Degefa3Kotebe University of Education, Addis Ababa, Ethiopia; Corresponding author.Center for Environmental Science, Addis Ababa University, Addis Ababa, EthiopiaCenter for Environmental Science, Addis Ababa University, Addis Ababa, EthiopiaCenter for Environmental Science, Addis Ababa University, Addis Ababa, EthiopiaIn this study, the dynamics of green spaces and land surface temperature patterns in four cities in Ethiopia were investigated using Landsat imagery. The typical characteristics of LST over the past three decades (1990–2020) in relation to green space dynamics were first investigated; subsequently, the spatial distribution of LST was characterized based on hybrid geospatial techniques and mono-window algorithm analysis, in which the contributions of green spaces to LST were studied. In addition, the multiple linear regression method and spatial regression models (SRMs) were employed to investigate and predict the spatial dependence of LST and urbanization-induced green space dynamics. Results show that cities horizontally expanded unceasingly from 1990 to 2020, with a substantial discrepancy in expansion rates and the spatial patterns of UHI intensities among the cities (p < 0.05). Moreover, the area proportion of the UHI is significantly larger than that of the UGS, and the differences in the UGS cooling contribution were found in different land uses and zones of the cities. In the study periods, the spatial pattern of LST was significantly controlled by NDBI, and its coefficient in the OLS followed the pattern NDVI > MNDWI > latitudes > longitudes > population density > DEM. Due to the large proportions of buildings While green land and water bodies show significant capability to mitigate UHI effects, cooling effects are not apparent when their sizes are small. Besides, the SRMs show that UHI intensities were significantly influenced by MNDWI in Bahir Dar and Hawassa (p < 0.01).Cities' LAMBDA coefficients have a positive relationship with UHII (p < 0.01). Our study could help city planners and the government understand the current cooling potential of existing UGS to mitigate the dynamics of UHI and sustain the sustainability of green space management in cities.http://www.sciencedirect.com/science/article/pii/S2405844023004814CitiesLand surface temperatureUrban ecosystemSpatial dependence |
| spellingShingle | Mekonnen Amberber Degefu Mekuria Argaw Gudina Legese Feyisa Sileshi Degefa Dynamics of green spaces- Land surface temperature intensity nexus in cities of Ethiopia Heliyon Cities Land surface temperature Urban ecosystem Spatial dependence |
| title | Dynamics of green spaces- Land surface temperature intensity nexus in cities of Ethiopia |
| title_full | Dynamics of green spaces- Land surface temperature intensity nexus in cities of Ethiopia |
| title_fullStr | Dynamics of green spaces- Land surface temperature intensity nexus in cities of Ethiopia |
| title_full_unstemmed | Dynamics of green spaces- Land surface temperature intensity nexus in cities of Ethiopia |
| title_short | Dynamics of green spaces- Land surface temperature intensity nexus in cities of Ethiopia |
| title_sort | dynamics of green spaces land surface temperature intensity nexus in cities of ethiopia |
| topic | Cities Land surface temperature Urban ecosystem Spatial dependence |
| url | http://www.sciencedirect.com/science/article/pii/S2405844023004814 |
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