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Climate projections of human thermal comfort for indoor workplaces

Author

Listed:
  • Markus Sulzer

    (University of Freiburg)

  • Andreas Christen

    (University of Freiburg)

Abstract

Climate models predict meteorological variables for outdoor spaces. Nevertheless, most people work indoors and are affected by heat indoors. We present an approach to transfer climate projections from outdoors to climate projections of indoor air temperature (Ti) and thermal comfort based on a combination of indoor sensors, artificial neural networks (ANNs), and 22 regional climate projections. Human thermal comfort and Ti measured by indoor sensors at 90 different workplaces in the Upper Rhine Valley were used as training data for ANN models predicting indoor conditions as a function of outdoor weather. Workplace-specific climate projections were modeled for the time period 2070–2099 and compared to the historical period 1970–1999 using the same ANNs, but ERA5-Land reanalysis data as input. It is shown that heat stress indoors will increase in intensity, frequency, and duration at almost all investigated workplaces. The rate of increase depends on building and room properties, the workplace purpose, and the representative concentration pathway (RCP2.6, RCP4.5, or RCP8.5). The projected increase of the mean air temperature in the summer (JJA) outdoors, by + 1.6 to + 5.1 K for the different RCPs, is higher than the increase in Ti at all 90 workplaces, which experience on average an increase of + 0.8 to + 2.5 K. The overall frequency of heat stress is higher at most workplaces than outdoors for the historical and the future period. The projected hours of indoor heat stress will increase on average by + 379 h, + 654 h, and + 1209 h under RCP2.6, RCP4.5, and RCP8.5, respectively.

Suggested Citation

  • Markus Sulzer & Andreas Christen, 2024. "Climate projections of human thermal comfort for indoor workplaces," Climatic Change, Springer, vol. 177(2), pages 1-22, February.
    • Handle: RePEc:spr:climat:v:177:y:2024:i:2:d:10.1007_s10584-024-03685-7
    DOI: 10.1007/s10584-024-03685-7
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    References listed on IDEAS

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    1. N. W. Arnell & J. A. Lowe & A. J. Challinor & T. J. Osborn, 2019. "Global and regional impacts of climate change at different levels of global temperature increase," Climatic Change, Springer, vol. 155(3), pages 377-391, August.
    2. Muñoz González, C.Mª & León Rodríguez, A.L. & Suárez Medina, R. & Ruiz Jaramillo, J., 2020. "Effects of future climate change on the preservation of artworks, thermal comfort and energy consumption in historic buildings," Applied Energy, Elsevier, vol. 276(C).
    3. Weijia Qian & Howard H. Chang, 2021. "Projecting Health Impacts of Future Temperature: A Comparison of Quantile-Mapping Bias-Correction Methods," IJERPH, MDPI, vol. 18(4), pages 1-12, February.
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