Analysis and mapping of the HDD, CDD and temperatures for southern Caspian Sea (CS) Based Model EH5OM

Document Type : Case Study


1 Faculty of Geography and Urban palnning, Islamic Azad university, Centre Tehran branch, Tehran, Iran

2 Department of Geography, University of Yazd, Yazd, Iran

3 Department of Physical Geography-Climatology, University of Yazd, Yazd, Iran


 In this paper the impact of climate change on southern Caspian Sea (CS) building energy demand was investigated by means of the degree-days method. Estimate heating degree-days (HDD) and cooling degree-days (CDD) from annual and seasonal simulated temperature data are required. To this end, data were received from EH5OM, the website of the Abdus Salam International Theoretical Physics Center (Italy). These data were run from 2015 to 2050 under A1 B scenario by the Intergovernmental Panel on Climate Change. For downscaling purposes, the fourth version of RegCM4 was used Heating and cooling degree-day with 18.3°C and 23.9°C temperature thresholds were calculated and then sum of annual and seasonal means of degree- day were obtained. The Results show that, at the northwestern corner of the Golestan province parts, the maximum temperature is observed; while in the southern parts of the Gilan and Mazandaran province minimum is recorded. Also a strong inverse relationship between temperature and elevation is observed. The lowest Annual energy consumption for Cooling would take place in the south Gilan province and so west and south Mazandaran province; while the highest energy consumption would be observed in the regions have low elevation, such as the northeastern Golestan province. The CDD values are negatively related to elevation and positively related to longitude and latitude.


  1. Abdurafikov, R., Grahn, E., Kannari, L., Ypyä, J., Kaukonen, S., Heimonen, I., & Paiho, S. (2017). An analysis of heating energy scenarios of a Finnish case district. Sustainable Cities and Society.

    Al-Hadhrami, L. M. (2013). Comprehensive review of cooling and heating degree days characteristics over Kingdom of Saudi Arabia. Renewable and sustainable energy reviews, 27, 305-314.

    Berger, T., Amann, C., Formayer, H., Korjenic, A., Pospischal, B., Neururer, C., & Smutny, R. (2014). Impacts of climate change upon cooling and heating energy demand of office buildings in Vienna, Austria. Energy and buildings, 80, 517-530.

    Bolattürk, A. (2008). Optimum insulation thicknesses for building walls with respect to cooling and heating degree-hours in the warmest zone of Turkey. Building and environment, 43(6), 1055-1064.

    Borah, P., Singh, M. K., & Mahapatra, S. (2015). Estimation of degree-days for different climatic zones of North-East India. Sustainable Cities and Society, 14, 70-81.

    Branković, Č., Srnec, L., & Patarčić, M. (2010). An assessment of global and regional climate change based on the EH5OM climate model ensemble. Climatic change, 98(1-2), 21. DOI 10.1007/s10584-009-9731-y.

    CIBSE, T. (2006). Degree-days: theory and application. Chartered Institute of Building Services Engineers, London.

    Coskun, C., Ertürk, M., Oktay, Z., & Hepbasli, A. (2014). A new approach to determine the outdoor temperature distributions for building energy calculations. Energy Conversion and Management, 78, 165-172.

    Cox, R. A., Drews, M., Rode, C., & Nielsen, S. B. (2015). Simple future weather files for estimating heating and cooling demand. Building and Environment, 83, 104-114.

    Csoknyai, T., Hrabovszky-Horváth, S., Georgiev, Z., Jovanovic-Popovic, M., Stankovic, B., Villatoro, O., & Szendrő, G. (2016). Building stock characteristics and energy performance of residential buildings in Eastern-European countries. Energy and Buildings, 132, 39-52.

    Idchabani, R., Garoum, M., & Khaldoun, A. (2015). Analysis and mapping of the heating and cooling degree- for Morocco at variable base temperatures. International Journal of Ambient Energy, 36(4), 190-198.

    Jennings, T. L. (2011). Transcending the adaptation/mitigation climate change science policy debate: Unmasking assumptions about adaptation and resilience. Weather, Climate, and Society, 3(4), 238-248.

    Jiang, F., Li, X., Wei, B., Hu, R., & Li, Z. (2009). Observed trends of heating and cooling degree-days in Xinjiang Province, China. Theoretical and applied climatology, 97(3-4), 349-360.

    Lindelöf, D. (2017). Bayesian estimation of a building's base temperature for the calculation of heating degree-days. Energy and Buildings, 134, 154-161.

    Mazidi, A., (2017). ….. Journal of Wetland Ecobiology, 8(4),

    Mourshed, M. (2012). Relationship between annual mean temperature and degree-days. Energy and buildings, 54, 418-425.

    Moustris, K. P., Nastos, P. T., Bartzokas, A., Larissi, I. K., Zacharia, P. T., & Paliatsos, A. G. (2015). Energy consumption based on heating/cooling degree days within the urban environment of Athens, Greece. Theoretical and Applied Climatology, 122(3-4), 517-529. DOI 10.1007/s00704-014-1308-7.

    Omidvar, K., Ebrahimi, R., & Narangifard, M. (2016). Anticipated Cooling Needs of Fars province with the application data EH5OM. Journal of natural environment hazards, 4(6), 57-75.

    Omidvar, K., Ebrahimi, R., Dadashi Roudbari, A.A., Malek Mirzayi, M., 2016. Evaluation of Extreme cold temperatures Spatio-temporal Iran under the effects of global warming to reduce risks. Environmental management hazards. 2(4), 423-437.

    Omidvar, K., Ebrahimi, R., kykhsrvy Kayani, M., lkzashkoor G. Effect Warm World the fluctuation of Temperature Iran under the Dynamic Model EH5OM. Researches in Geographical Sciences. 2017; 16 (43) :195-216

    Omidvar, K., Ebrahimi, R., Mazidi, A., 2016. The Analysis of the Effect of Global Warming on the Monthly Heating and Cooling Degree-Hours of Iran. The Journal of Spatial Planning. 20(2): 41-64.

    OrtizBeviá, M. J., Sánchez-López, G., Alvarez-Garcìa, F. J., & RuizdeElvira, A. (2012). Evolution of heating and cooling degree-days in Spain: trends and interannual variability. Global and Planetary Change, 92, 236-247.

    Pouliotte, J., Smit, B., & Westerhoff, L. (2009). Adaptation and development: Livelihoods and climate change in Subarnabad, Bangladesh. Climate and Development, 1(1), 31-46.

    1. Roshan, G. R., & Grab, S. W. (2012). Regional climate change scenarios and their impacts on water requirements for wheat production in Iran. Int J Plant Prod, 6(2), 239-266.

    Rosselló-Batle, B., Ribas, C., Moià-Pol, A., & Martínez-Moll, V. (2015). An assessment of the relationship between embodied and thermal energy demands in dwellings in a Mediterranean climate. Energy and Buildings, 109, 230-244.

    Wang, H., & Chen, Q. (2014). Impact of climate change heating and cooling energy use in buildings in the United States. Energy and Buildings, 82, 428-436.

    Yau, Y. H., & Hasbi, S. (2013). A review of climate change impacts on commercial buildings and their technical services in the tropics. Renewable and Sustainable Energy Reviews, 18, 430-441.

    Yu, J., Yang, C., Tian, L., & Liao, D. (2009). A study on optimum insulation thicknesses of external walls in hot summer and cold winter zone of China. Applied energy, 86(11), 2520-2529.

    Zarghami, M., Abdi, A., Babaeian, I., Hassanzadeh, Y., & Kanani, R. (2011). Impacts of climate change on runoffs in East Azerbaijan, Iran. Global and Planetary Change, 78(3), 137-146.

  • Receive Date: 10 May 2020
  • Revise Date: 11 September 2020
  • Accept Date: 20 October 2020
  • First Publish Date: 25 November 2020