Classifying Spatial Homogeneity of Thermally-Stabilized Surface to Define Differentiation Local Atmospheric Zones in Chiang Mai City

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Manat Srivanit
Sudarat Auttarat


The aim of this research paper is to examine ways to integrated impact of the natural environment and typical urban morphological features on the thermal load into urban climate planning using spatially distributed information of local atmospheric zones (LAZs). To achieve this, the form and morphology of urban planning and their contents concerning urban heat island issues were examined in the 2557 BE summer season in Chiang Mai city area. Spatially distributed information on local atmospheric zones and their homogeneity of thermally-stabilized surface in the study area was generated using the spatial-multivariate analysis, which is an approach of urban climate analysis and evaluation tool suitable for planning purposes. The results found that the downtown-suburb continuum of local atmospheric zones with a hierarchy of 8 zones and an urban heat island intensity (UHII) can often exceed 4.35 Celsius in summer. An urban core of 20.88 square kilometer as the highly temperature-sensitive urban area is very densely built with a very high thermal load with the mean land surface temperature of 34.49 Celsius. Remedial measures and mitigation actions are urgently needed. Excessive development and construction should be strictly prohibited along the potential ventilation paths. Reasonable planning and reconstruction should improve severe urban climatic problems if possible. Building height imitations, rational spatial distribution, and controlling the aspect ratio of building height to canyon width and orientation in streets should be considered to avoid further urban environmental damage. Additional greenery and tree planting in open spaces and streets in this planning zone are strongly recommended. Moreover, greenery should be largely introduced around existing buildings, which can alleviate the thermal load and promote cool air exchange among buildings. Widening streets and preserving open space are long-term and effective measures.


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American Meteorological Society US [AMS]. (2014). The definition of Urban Canopy Layer glossary of meteorology. Retrieved April 2014, from

American Meteorological Society US [AMS]. (2015). The definition of Urban Microclimate glossary of meteorology. Retrieved November 2015, from

Baumüller, J., Hoffmann, U. & Reuter, U. (1992). Climate booklet for urban development, Ministry of Economy Baden-Wuerttemberg, Environmental Protection Department, Germany.

Baumüller, J. & Reuter, U. (1999). Demands and requirements on a climate atlas for urban planning and design. Office of Environmental Protection: Stuttgart.

Baumüller, J. (2006). Implementation of climatic aspects in urban development: the example Stuttgart. In Paper Presented at the Urban Climate + Urban Greenery. 42–52, PGBC, Hong Kong.Charoentrakulpeeti, W. (2014). Physical Characteristics and Ventilation Pattern in Uthai Thani city. Journalof Architectural/Planning Research and Studies, 11(2), 99-112.

Esser, G. (1989). Global land-use changes from 1860 to 1980 and future projections to 2500. Ecological Modelling, 44, 307–316.

He, X., Shen, S., Miao, S., Dou, J. & Zhang, Y. (2015). Quantitative detection of urban climate resources and the establishment of an urban climate map (UCMap) system in Beijing. Building and Environment, 92, 668-678.

Knoch, K. (1951). Uber das Wesen einer Landesklimaaufnahme. Meteorologische Zeitschrift, 5, 173.

Knoch, K. (1963). Die Landsklima-aufanhme, Wesen und Methodik. Berichte der Deutschen Wetterdienst, 85, 64.

Klimaatlas. (1992). Nachbarschaftsverband Stuttgart (Stuttgart Regional Federation), Climate study for the area of the Stuttgart Regional Federation and bordering areas of the Stuttgart region. Landeschauptstadt Stuttgart, Amt fur Umweltschutz, Abteilung Stadtklimatologie: Stuttgart.

Lanchanon, P. (2014). The potential of agricultural lands for conservation of green area in Chiang Mai city. Journal of Architectural/Planning Research and Studies, 10(2), 115-137.

Lambin, E. F., Baulies, X., Bockstael, N., Fischer, G., Krug, T., Leemans, R., Moran, E. F., Rindfuss, R. R., Sato, Y., Skole, D., Turber, B. L. & Vogel, C. (1999). IGBP Report No.48/IHDP Report No.10: Land-use and Landcover Change Implementation Strategy. IGBP Secretariat, The Royal Swedish Academy of Sciences: Stockholm, 75–85.

McMichael, A. J., Wilkinson, P., Kovats, R. S., Pattenden, S., Hajat, S., Armstrong, B., Vajanapoom, N., Niciu, E. M., Mahomed, H., Kingkeow, C., Kosnik, M., O’Neill, M. S., Romieu, I., Ramirez-Aguilar, M., Barreto, M.L., Gouveia, N. & Nikiforov, B. (2008). International study of temperature, heat and urban mortality: the ‘ISOTHURM’ project. International Journal of Epidemiology, 37(5), 1121-1131.

Mills, G. (1997). An urban canopy-layer climate model. Theoretical and Applied Climatology, 57, 229–244.

Mitraka, Z., Chrysoulakis, N., Gastellu-Etchegorry, J. P. & Del Frate, F. (2015). Exploiting earth observation data products for mapping local climate zones. Proceedings of the 9th International Conference on Urban Climate (ICUC9), Toulouse France.

Oke, T. R. (1987). Boundary layer climates. Routledge: London.

Oke, T. R. (2004). Initial guidance to obtain representative meteorological observations at urban sites. Instrument and Observing Methods, Report No. 81, WMO/TD-No.1250.

Ren, C., Ng, E. & Katzschner, L. (2011). Urban climatic map studies: a review. International Journal of Climatology, 31, 2213-2233.

Santamouris, M., Cartalis, C., Synnefa, A. & Kolokotsa, D. (2015). On the impact of urban heat island and global warming on the power demand and electricity consumption of buildings—A review. Energy and Buildings, 98, 119–124.

Srivanit, M., Hokao, K. & Phonekeo, V. (2012). Assessing the impact of urbanization on urban thermal environment: a case study of Bangkok metropolitan. International Journal of Applied Science Technology, 2(7), 243-256.

Srivanit, M. & Kokao, K. (2012). Effects of urban development and spatial characteristics on urban thermal environment in Chiang Mai metropolitan, Thailand. Lowland Technology International, 14(2), 9-22.

Srivanit, M. & Auttarat, S. (2015). The Summer Thermal Environment and Human Comfort of Shaded Outdoor and Semi-Outdoor Spaces to Living in the Urban Area of Chiang Mai City. Journal of Architectural/Planning Research and Studies, 12(2), 53-52.

Thai Meteorological Department [TMD]. (2015). Chiang Mai Annual Weather Summary. Retrieved November 2015, from

United Nations Population Fund [UNFPA]. (2007). Earlier UN estimates indicated that this urban transition would occur in 2007. United Nations Population Fund, 1.

United Nations [UN]. (2008). State of the World’s Cities 2008/2009 – Harmonious Cities. United Nations Human Settlements Programme (UN-HABITAT): Earthscan, London, Sterling, VA.

Virtual Desktop Infrastructure [VDI]. (1997). VDI-Guideline 3787, Part 1, Environmental Meteorology-Climate and Air Pollution Maps for Cities and Regions. Beuth Verlag: Berlin.

Zhou, L., Dickinson, R. E., Tian, Y., Fang, J., Li, Q., Kaufmann, R. K., Tucker, C. J. & Myneni, R. B. (2004). Evidence for a significant urbanization effect on climate in China. Proceedings of the National Academy of Sciences of the United States of America, 101, 9540–9544.