Overestimating Impacts of Urbanization on Regional Temperatures in Developing Megacity: Beijing as an Example
Land-use and land cover changes may have important local, regional, and global climatic impacts by modifying the underlying land surface conditions, which in turn influence the exchange of energy and moisture between the land surface and atmosphere. Many studies have shown that urbanization has cont...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2019/3985715 |
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| author | Wei Cao Lin Huang Lulu Liu Jun Zhai Dan Wu |
| author_facet | Wei Cao Lin Huang Lulu Liu Jun Zhai Dan Wu |
| author_sort | Wei Cao |
| collection | DOAJ |
| description | Land-use and land cover changes may have important local, regional, and global climatic impacts by modifying the underlying land surface conditions, which in turn influence the exchange of energy and moisture between the land surface and atmosphere. Many studies have shown that urbanization has contributed to climate warming, and the amount of warming has varied. As the capital of China and one of the world’s megacities, Beijing has experienced rapid urbanization over the past 30 years. In this study, we quantitatively investigated the impacts of urbanization on regional temperatures based on observations from meteorological stations and National Centers for Environmental Prediction (NCEP) reanalysis data and overestimating of the impacts were found. Comparing the temperature trends of land-use types, forest showed stronger inhibitory effects on temperature increase (−0.085°C/10a). Cropland also had a negative effect on climate warming yearly and seasonally, especially in winter (−1.133°C/10a) and spring (−0.299°C/10a). Conversely, the urban area showed strong warming effects (0.438°C/10a). The conversion of cropland to urban land appeared to show the highest warming trend (0.548°C/10a). However, the cooling effect of forest and grassland with high vegetation coverage inhibited climatic warming attributed to rapid urbanization. In addition, planting trees or grass along roadsides and increasing green parks and green roofs can also suppress surface warming. Therefore, the actual warming effects of urbanization on temperatures were overestimated in megacities or urban agglomeration regions. The results showed that the green space and landscape configuration should be considered in urban planning to increase green space and reduce the influence of urban heat island effect. |
| format | Article |
| id | doaj-art-3f130add336d418dbe5402142c027d9f |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
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| series | Advances in Meteorology |
| spelling | doaj-art-3f130add336d418dbe5402142c027d9f2025-02-03T05:58:12ZengWileyAdvances in Meteorology1687-93091687-93172019-01-01201910.1155/2019/39857153985715Overestimating Impacts of Urbanization on Regional Temperatures in Developing Megacity: Beijing as an ExampleWei Cao0Lin Huang1Lulu Liu2Jun Zhai3Dan Wu4Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, ChinaKey Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, ChinaSchool of Architecture and Civil Engineering, Chengdu University, Chengdu 610106, ChinaSatellite Environment Center, Ministry of Ecology and Environment, Beijing 100094, ChinaNanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, ChinaLand-use and land cover changes may have important local, regional, and global climatic impacts by modifying the underlying land surface conditions, which in turn influence the exchange of energy and moisture between the land surface and atmosphere. Many studies have shown that urbanization has contributed to climate warming, and the amount of warming has varied. As the capital of China and one of the world’s megacities, Beijing has experienced rapid urbanization over the past 30 years. In this study, we quantitatively investigated the impacts of urbanization on regional temperatures based on observations from meteorological stations and National Centers for Environmental Prediction (NCEP) reanalysis data and overestimating of the impacts were found. Comparing the temperature trends of land-use types, forest showed stronger inhibitory effects on temperature increase (−0.085°C/10a). Cropland also had a negative effect on climate warming yearly and seasonally, especially in winter (−1.133°C/10a) and spring (−0.299°C/10a). Conversely, the urban area showed strong warming effects (0.438°C/10a). The conversion of cropland to urban land appeared to show the highest warming trend (0.548°C/10a). However, the cooling effect of forest and grassland with high vegetation coverage inhibited climatic warming attributed to rapid urbanization. In addition, planting trees or grass along roadsides and increasing green parks and green roofs can also suppress surface warming. Therefore, the actual warming effects of urbanization on temperatures were overestimated in megacities or urban agglomeration regions. The results showed that the green space and landscape configuration should be considered in urban planning to increase green space and reduce the influence of urban heat island effect.http://dx.doi.org/10.1155/2019/3985715 |
| spellingShingle | Wei Cao Lin Huang Lulu Liu Jun Zhai Dan Wu Overestimating Impacts of Urbanization on Regional Temperatures in Developing Megacity: Beijing as an Example Advances in Meteorology |
| title | Overestimating Impacts of Urbanization on Regional Temperatures in Developing Megacity: Beijing as an Example |
| title_full | Overestimating Impacts of Urbanization on Regional Temperatures in Developing Megacity: Beijing as an Example |
| title_fullStr | Overestimating Impacts of Urbanization on Regional Temperatures in Developing Megacity: Beijing as an Example |
| title_full_unstemmed | Overestimating Impacts of Urbanization on Regional Temperatures in Developing Megacity: Beijing as an Example |
| title_short | Overestimating Impacts of Urbanization on Regional Temperatures in Developing Megacity: Beijing as an Example |
| title_sort | overestimating impacts of urbanization on regional temperatures in developing megacity beijing as an example |
| url | http://dx.doi.org/10.1155/2019/3985715 |
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