Effects of Area and Shape of Greenspace on Urban Cooling in Nanjing, China
Publication: Journal of Urban Planning and Development
Volume 145, Issue 4
Abstract
Urban greenspaces play a key role in mitigating the urban heat-island (UHI) effect. The aim of this study is to quantify the effects of area and shape of a greenspace on urban cooling using correlation analyses and regression models. This was achieved by taking a very densely populated urban area in Nanjing, China, as a case study and classifying 78 greenspaces within the study area into nine groups based on size and shape. Cooling distance and intensity values were calculated based on the land surface temperature derived using remote sensing. The results indicate that (1) large and regular greenspaces have a greater cooling distance than small and irregular ones; (2) in general, an increase of area can enhance the cooling intensity of a greenspace when it is smaller than a certain threshold (i.e., 10 ha); and (3) reducing the shape complexity of a greenspace can enhance cooling intensity when greenspaces are larger than 5 ha. This study provides insights for urban planners and landscape designers to determine better combinations of area and shape of urban greenspace in order to effectively alleviate the UHI effect.
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Acknowledgments
The authors sincerely thank the editors and three anonymous reviewers for their constructive comments and suggestions. This research was supported by the National Key Research and Development Program of China (Project No. 2017YFD0600701) and the Doctorate Fellowship Foundation of Nanjing Forestry University.
References
Arnfield, A. J. 2003. “Two decades of urban climate research: A review of turbulence, exchanges of energy and water, and the urban heat island.” Int. J. Climatol. 23 (1): 1–26. https://doi.org/10.1002/joc.859.
Bacci, L., M. Morabito, A. Raschi, and F. Ugolini. 2002. “Thermohygrometric conditions of some urban parks of Florence (Italy) and their effects on human well-being.” Trees 6: 49.
Bowler, D. E., L. Buyung-Ali, T. M. Knight, and A. S. Pullin. 2010. “Urban greening to cool towns and cities: A systematic review of the empirical evidence.” Landscape Urban Plann. 97 (3): 147–155. https://doi.org/10.1016/j.landurbplan.2010.05.006.
Cao, X., A. Onishi, J. Chen, and H. Imura. 2010. “Quantifying the cool island intensity of urban parks using ASTER and IKONOS data.” Landscape Urban Plann. 96 (4): 224–231. https://doi.org/10.1016/j.landurbplan.2010.03.008.
Chen, A., X. A. Yao, R. Sun, and L. Chen. 2014. “Effect of urban green patterns on surface urban cool islands and its seasonal variations.” Urban For. Urban Greening 13 (4): 646–654. https://doi.org/10.1016/j.ufug.2014.07.006.
Chen, X., Y. Su, D. Li, G. Huang, W. Chen, and S. Chen. 2012. “Study on the cooling effects of urban parks on surrounding environments using Landsat TM data: A case study in Guangzhou, southern China.” Int. J. Remote Sens. 33 (18): 5889–5914. https://doi.org/10.1080/01431161.2012.676743.
Cheng, X., B. Wei, G. Chen, J. Li, and C. Song. 2015. “Influence of park size and its surrounding urban landscape patterns on the park cooling effect.” J. Urban Plann. Dev. 141 (3): A4014002. https://doi.org/10.1061/(ASCE)UP.1943-5444.0000256.
Connors, J. P., C. S. Galletti, and W. T. L. Chow. 2013. “Landscape configuration and urban heat island effects: Assessing the relationship between landscape characteristics and land surface temperature in Phoenix, Arizona.” Landscape Ecol. 28 (2): 271–283. https://doi.org/10.1007/s10980-012-9833-1.
Dimoudi, A., and M. Nikolopoulou. 2003. “Vegetation in the urban environment: Microclimatic analysis and benefits.” Energy Build. 35 (1): 69–76. https://doi.org/10.1016/S0378-7788(02)00081-6.
Doick, K., and T. Hutchings. 2013. Air temperature regulation by urban trees and green infrastructure, 1–10. Edinburgh, UK: Forestry Commission.
Doick, K. J., A. Peace, and T. R. Hutchings. 2014. “The role of one large greenspace in mitigating London’s nocturnal urban heat island.” Sci. Total Environ. 493 (Sep): 662–671. https://doi.org/10.1016/j.scitotenv.2014.06.048.
Du, H., X. Song, H. Jiang, Z. Kan, Z. Wang, and Y. Cai. 2016a. “Research on the cooling island effects of water body: A case study of Shanghai, China.” Ecol. Indic. 67 (Aug): 31–38. https://doi.org/10.1016/j.ecolind.2016.02.040.
Du, S., Z. Xiong, Y. C. Wang, and L. Guo. 2016b. “Quantifying the multilevel effects of landscape composition and configuration on land surface temperature.” Remote Sens. Environ. 178 (Jun): 84–92. https://doi.org/10.1016/j.rse.2016.02.063.
Feyisa, G. L., K. Dons, and H. Meilby. 2014. “Efficiency of parks in mitigating urban heat island effect: An example from Addis Ababa.” Landscape Urban Plann. 123 (Mar): 87–95. https://doi.org/10.1016/j.landurbplan.2013.12.008.
Fintikakis, N., et al. 2011. “Bioclimatic design of open public spaces in the historic centre of Tirana, Albania.” Sustainable Cities Soc. 1 (1): 54–62. https://doi.org/10.1016/j.scs.2010.12.001.
Geospatial Data Cloud. 2016. “Data resource: DEM digital elevation data.” Accessed December 14, 2017. https://www.gscloud.cn.
Hajat, S., R. S. Kovats, and K. Lachowycz. 2007. “Heat-related and cold-related deaths in England and Wales: Who is at risk?” Occup. Environ. Med. 64 (2): 93–100. https://doi.org/10.1136/oem.2006.029017.
Hamada, S., and T. Ohta. 2010. “Seasonal variations in the cooling effect of urban green areas on surrounding urban areas.” Urban For. Urban Greening 9 (1): 15–24. https://doi.org/10.1016/j.ufug.2009.10.002.
Henseke, A., and J. H. Breuste. 2015. “Climate-change sensitive residential areas and their adaptation capacities by urban green changes: Case study of Linz, Austria.” J. Urban Plann. Dev. 141 (3): A5014007. https://doi.org/10.1061/(ASCE)UP.1943-5444.0000262.
Jacob, D. J., and D. A. Winner. 2009. “Effect of climate change on air quality.” Atmos. Environ. 43 (1): 51–63. https://doi.org/10.1016/j.atmosenv.2008.09.051.
Jansson, C., P. E. Jansson, and D. Gustafsson. 2007. “Near surface climate in an urban vegetated park and its surroundings.” Theor. Appl. Climatol. 89 (3–4): 185–193. https://doi.org/10.1007/s00704-006-0259-z.
Jauregui, E. 1990. “Influence of a large urban park on temperature and convective precipitation in a tropical city.” Energy Build. 15 (3–4): 457–463. https://doi.org/10.1016/0378-7788(90)90021-A.
Jim, C. Y., and S. S. Chen. 2003. “Comprehensive greenspace planning based on landscape ecology principles in compact Nanjing city, China.” Landscape Urban Plann. 65 (3): 95–116. https://doi.org/10.1016/S0169-2046(02)00244-X.
Klein, P. M., and R. Coffman. 2015. “Establishment and performance of an experimental green roof under extreme climatic conditions.” Sci. Total Environ. 512–513 (Apr): 82–93.
Kolokotroni, M., Y. Zhang, and R. Watkins. 2007. “The London heat island and building cooling design.” Sol. Energy 81 (1): 102–110. https://doi.org/10.1016/j.solener.2006.06.005.
Kong, F., H. Yin, P. James, L. R. Hutyra, and H. S. He. 2014. “Effects of spatial pattern of greenspace on urban cooling in a large metropolitan area of eastern China.” Landscape Urban Plann. 128 (Aug): 35–47. https://doi.org/10.1016/j.landurbplan.2014.04.018.
Kotharkar, R., and M. Surawar. 2016. “Land use, land cover, and population density impact on the formation of canopy urban heat islands through traverse survey in the Nagpur urban area, India.” J. Urban Plann. Dev. 142 (1): 04015003. https://doi.org/10.1061/(ASCE)UP.1943-5444.0000277.
Lau, S. S., P. Lin, and H. Qin. 2012. “A preliminary study on environmental performances of pocket parks in high-rise and high-density urban context in Hong Kong.” Int. J. Low-Carbon Technol. 7 (3): 215–225. https://doi.org/10.1093/ijlct/cts033.
Lee, S. H., K. S. Lee, W. C. Jin, and H. K. Song. 2009. “Effect of an urban park on air temperature differences in a central business district area.” Landscape Ecol. Eng. 5 (2): 183–191. https://doi.org/10.1007/s11355-009-0067-6.
Li, X., W. Zhou, and Z. Ouyang. 2013. “Relationship between land surface temperature and spatial pattern of greenspace: What are the effects of spatial resolution?” Landscape Urban Plann. 114 (Jun): 1–8. https://doi.org/10.1016/j.landurbplan.2013.02.005.
Li, X., W. Zhou, Z. Ouyang, W. Xu, and H. Zheng. 2012. “Spatial pattern of greenspace affects land surface temperature: Evidence from the heavily urbanized Beijing metropolitan area, China.” Landscape Ecol. 27 (6): 887–898. https://doi.org/10.1007/s10980-012-9731-6.
Lin, W., T. Yu, X. Chang, W. Wu, and Y. Zhang. 2015. “Calculating cooling extents of green parks using remote sensing: Method and test.” Landscape Urban Plann. 134 (Feb): 66–75. https://doi.org/10.1016/j.landurbplan.2014.10.012.
Liu, H. Q., and A. Huete. 1995. “Feedback based modification of the NDVI to minimize canopy background and atmospheric noise.” IEEE Trans. Geosci. Remote Sens. 33 (2): 457–465.
Mao, K., Z. Qin, J. Shi, and P. Gong. 2005. “A practical split-window algorithm for retrieving land-surface temperature from MODIS data.” Int. J. Remote Sens. 26 (15): 3181–3204. https://doi.org/10.1080/01431160500044713.
Matsushita, B., W. Yang, J. Chen, Y. Onda, and G. Qiu. 2007. “Sensitivity of the enhanced vegetation index (EVI) and normalized difference vegetation index (NDVI) to topographic effects: A case study in high-density cypress forest.” Sensors 7 (11): 2636–2651. https://doi.org/10.3390/s7112636.
Miura, T., A. R. Huete, W. J. D. Van Leeuwen, and K. Didan. 1998. “Vegetation detection through smoke-filled AVIRIS images: An assessment using MODIS band passes.” J. Geophys. Res. Atmos. 103 (D24): 32001–32011. https://doi.org/10.1029/98JD00051.
Nanjing Municipal Bureau Statistics. 2016. “Nanjing statistical yearbook 2015.” Accessed December 17, 2017. http://221.226.86.104/file/2016/index.htm.
Nielsen, T. S., and K. B. Hansen. 2007. “Do green areas affect health? Results from a Danish survey on the use of green areas and health indicators.” Health Place 13 (4): 839–850. https://doi.org/10.1016/j.healthplace.2007.02.001.
Norton, B. A., A. M. Coutts, S. J. Livesley, R. J. Harris, A. M. Hunter, and N. S. G. Williams. 2015. “Planning for cooler cities: A framework to prioritise green infrastructure to mitigate high temperatures in urban landscapes.” Landscape Urban Plann. 134 (Feb): 127–138. https://doi.org/10.1016/j.landurbplan.2014.10.018.
Oke, T. R. 1973. “City size and the urban heat island.” Atmos. Environ. 7 (8): 769–779. https://doi.org/10.1016/0004-6981(73)90140-6.
Oke, T. R. 1988. “Street design and urban canopy layer climate.” Energy Build. 11 (1–3): 103–113. https://doi.org/10.1016/0378-7788(88)90026-6.
Oliveira, S., H. Andrade, and T. Vaz. 2011. “The cooling effect of green spaces as a contribution to the mitigation of urban heat: A case study in Lisbon.” Build. Environ. 46 (11): 2186–2194. https://doi.org/10.1016/j.buildenv.2011.04.034.
Onishi, A., X. Cao, T. Ito, F. Shi, and H. Imura. 2010. “Evaluating the potential for urban heat-island mitigation by greening parking lots.” Urban For. Urban Greening 9 (4): 323–332. https://doi.org/10.1016/j.ufug.2010.06.002.
Park, J., J. H. Kim, D. K. Lee, C. Y. Park, and S. G. Jeong. 2017. “The influence of small green space type and structure at the street level on urban heat island mitigation.” Urban For. Urban Greening 21 (Jan): 203–212. https://doi.org/10.1016/j.ufug.2016.12.005.
Patz, J. A., D. Campbell-Lendrum, T. Holloway, and J. A. Foley. 2005. “Impact of regional climate change on human health.” Nature 438 (7066): 310–317. https://doi.org/10.1038/nature04188.
Potchter, O., P. Cohen, and A. Bitan. 2006. “Climatic behavior of various urban parks during hot and humid summer in the Mediterranean city of Tel Aviv, Israel.” Int. J. Climatol. 26 (12): 1695–1711. https://doi.org/10.1002/joc.1330.
Purevdorj, T. S., R. Tateishi, T. Ishiyama, and Y. Honda. 1998. “Relationships between percent vegetation cover and vegetation indices.” Int. J. Remote Sens. 19 (18): 3519–3535. https://doi.org/10.1080/014311698213795.
Sanesi, G., R. Lafortezza, M. Bonnes, and G. Carrus. 2006. “Comparison of two different approaches for assessing the psychological and social dimensions of green spaces.” Urban For. Urban Greening 5 (3): 121–129. https://doi.org/10.1016/j.ufug.2006.06.001.
Schwarz, N., and A. M. Manceur. 2015. “Analyzing the influence of urban forms on surface urban heat islands in Europe.” J. Urban Plann. Dev. 141 (3): A4014003. https://doi.org/10.1061/(ASCE)UP.1943-5444.0000263.
Schwarz, N., U. Schlink, U. Franck, and K. Großmann. 2012. “Relationship of land surface and air temperatures and its implications for quantifying urban heat island indicators—An application for the city of Leipzig (Germany).” Ecol. Indic. 18 (Jul): 693–704. https://doi.org/10.1016/j.ecolind.2012.01.001.
Spronken-Smith, R. A., and T. R. Oke. 1998. “The thermal regime of urban parks in two cities with different summer climates.” Int. J. Remote Sens. 19 (11): 2085–2104. https://doi.org/10.1080/014311698214884.
Tan, C. L., N. H. Wong, and S. K. Jusuf. 2014. “Effects of vertical greenery on mean radiant temperature in the tropical urban environment.” Landscape Urban Plann. 127 (Jul): 52–64. https://doi.org/10.1016/j.landurbplan.2014.04.005.
Tan, M., and X. Li. 2013. “Integrated assessment of the cool island intensity of green spaces in the mega city of Beijing.” Int. J. Remote Sens. 34 (8): 3028–3043. https://doi.org/10.1080/01431161.2012.757377.
Tan, M., X. Li, C. Lu, W. Luo, X. Kong, and S. Ma. 2008. “Urban population densities and their policy implications in China.” Habitat Int. 32 (4): 471–484. https://doi.org/10.1016/j.habitatint.2008.01.003.
Tran, H., D. Uchihama, S. Ochi, and Y. Yasuoka. 2006. “Assessment with satellite data of the urban heat island effects in Asian mega cities.” Int. J. Appl. Earth Obs. Geoinf. 8 (1): 34–48. https://doi.org/10.1016/j.jag.2005.05.003.
United Nations. 2015. World urbanization prospects: The 2014 revision. New York: United Nations.
UNPFA (United Nations Population Fund). 2007. The state of world population 2007: Unleashing the potential of urban growth. New York: United Nations Publications.
Upmanis, H., I. Eliasson, and S. Lindqvist. 1998. “The influence of green areas on nocturnal temperatures in a high latitude city (Goteborg, Sweden).” Int. J. Climatol. 18 (6): 681–700. https://doi.org/10.1002/(SICI)1097-0088(199805)18:6%3C681::AID-JOC289%3E3.0.CO;2-L.
USGS. 2017. “Geological survey.” Accessed December 16, 2017. https://glovis.usgs.gov/.
Voogt, J., and T. Oke. 2003. “Thermal remote sensing of urban climates.” Remote Sens. Environ. 86 (3): 370–384. https://doi.org/10.1016/S0034-4257(03)00079-8.
Wang, J., S. Li, X. Cui, H. Li, X. Qian, C. Wang, and Y. Sun. 2016. “Bioaccessibility, sources and health risk assessment of trace metals in urban park dust in Nanjing, southeast China.” Ecotoxicol. Environ. Saf. 128 (Jun): 161–170. https://doi.org/10.1016/j.ecoenv.2016.02.020.
Weng, Q., D. Lu, and J. Schubring. 2004. “Estimation of land surface temperature-vegetation abundance relationship for urban heat island studies.” Remote Sens. Environ. 89 (4): 467–483. https://doi.org/10.1016/j.rse.2003.11.005.
Xie, M., Y. Gao, Y. Cao, J. Breuste, M. Fu, and D. Tong. 2015. “Dynamics and temperature regulation function of urban green connectivity.” J. Urban Plann. Dev. 141 (3): A5014008. https://doi.org/10.1061/(ASCE)UP.1943-5444.0000266.
Yan, E., G. Wang, H. Lin, C. Xia, and H. Sun. 2015. “Phenology-based classification of vegetation cover types in northeast China using MODIS NDVI and EVI time series.” Int. J. Remote Sens. 36 (2): 489–512. https://doi.org/10.1080/01431161.2014.999167.
Yu, X., X. Guo, and Z. Wu. 2014. “Land surface temperature retrieval from Landsat 8 TIRS-comparison between radiative transfer equation-based method, split window algorithm and single channel method.” Remote Sens. 6 (10): 9829–9852. https://doi.org/10.3390/rs6109829.
Zhou, W., G. Huang, and M. L. Cadenasso. 2011. “Does spatial configuration matter? Understanding the effects of land cover pattern on land surface temperature in urban landscapes.” Landscape Urban Plann. 102 (1): 54–63. https://doi.org/10.1016/j.landurbplan.2011.03.009.
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Journal of Urban Planning and Development
Volume 145 • Issue 4 • December 2019
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©2019 American Society of Civil Engineers.
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Received: Jun 5, 2018
Accepted: Feb 20, 2019
Published online: Aug 29, 2019
Published in print: Dec 1, 2019
Discussion open until: Jan 29, 2020
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