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Estimation of Time-Course Core Temperature and Water Loss in Realistic Adult and Child Models with Urban Micrometeorology Prediction

Author

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  • Toshiki Kamiya

    (Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan)

  • Ryo Onishi

    (Center for Earth Information Science and Technology, Japan Agency for Marine-Earth Science and Technology, Yokohama 236-0001, Japan)

  • Sachiko Kodera

    (Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan)

  • Akimasa Hirata

    (Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan
    Center of Biomedical Physics and Information Technology, Nagoya Institute of Technology, Nagoya 466-8555, Japan
    Frontier Research Institute of Information Science, Nagoya Institute of Technology, Nagoya 466-8555, Japan)

Abstract

Ambient conditions may change rapidly and notably over time in urban areas. Conventional indices, such as the heat index and wet bulb globe temperature, are useful only in stationary ambient conditions. To estimate the risks of heat-related illness, human thermophysiological responses should be followed for ambient conditions in the time domain. We develop a computational method for estimating the time course of core temperature and water loss by combining micrometeorology and human thermal response. We firstly utilize an urban micrometeorology prediction to reproduce the environment surrounding walkers. The temperature elevations and sweating in a standard adult and child are then estimated for meteorological conditions. With the integrated computational method, we estimate the body temperature and thermophysiological responses for an adult and child walking along a street with two routes (sunny and shaded) in Tokyo on 7 August 2015. The difference in the core temperature elevation in the adult between the two routes was 0.11 °C, suggesting the necessity for a micrometeorology simulation. The differences in the computed body core temperatures and water loss of the adult and child were notable, and were mainly characterized by the surface area-to-mass ratio. The computational techniques will be useful for the selection of actions to manage the risk of heat-related illness and for thermal comfort.

Suggested Citation

  • Toshiki Kamiya & Ryo Onishi & Sachiko Kodera & Akimasa Hirata, 2019. "Estimation of Time-Course Core Temperature and Water Loss in Realistic Adult and Child Models with Urban Micrometeorology Prediction," IJERPH, MDPI, vol. 16(24), pages 1-15, December.
  • Handle: RePEc:gam:jijerp:v:16:y:2019:i:24:p:5097-:d:297712
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    References listed on IDEAS

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    1. Ana Casanueva & Annkatrin Burgstall & Sven Kotlarski & Alessandro Messeri & Marco Morabito & Andreas D. Flouris & Lars Nybo & Christoph Spirig & Cornelia Schwierz, 2019. "Overview of Existing Heat-Health Warning Systems in Europe," IJERPH, MDPI, vol. 16(15), pages 1-22, July.
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    Cited by:

    1. Letian Li & Boyang Sun & Zhuqiang Hu & Jun Zhang & Song Gao & Haifeng Bian & Jiansong Wu, 2022. "Heat Strain Evaluation of Power Grid Outdoor Workers Based on a Human Bioheat Model," IJERPH, MDPI, vol. 19(13), pages 1-17, June.
    2. Essam A. Rashed & Sachiko Kodera & Jose Gomez-Tames & Akimasa Hirata, 2020. "Influence of Absolute Humidity, Temperature and Population Density on COVID-19 Spread and Decay Durations: Multi-Prefecture Study in Japan," IJERPH, MDPI, vol. 17(15), pages 1-14, July.

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