An environmental stress index (ESI) as a substitute for the wet bulb globe temperature (WBGT)

D. S. Moran, K. B. Pandolf, Y. Shapiro, Y. Heled, Y. Shani, W. T. Mathew, R. R. Gonzalez

Research output: Contribution to journalArticlepeer-review

136 Scopus citations

Abstract

The purpose of this study was to develop a new environmental stress index (ESI) based on different parameters relating to heat stress. Meteorological measurements were taken in three climatic zones (hot/wet, hot/dry, and extremely hot/dry) for 60 days, and a new stress index based on these databases was developed as follows: ESI = 0.63Ta - 0.03RH + 0.002SR + 0.0054(Ta·RH) - 0.073(0.1 + SR)-1. where Ta is the ambient temperature (°C), RH the relative humidity (%), and SR the solar radiation (W·m-1). The correlation coefficients between ESI and wet bulb globe temperature (WBGT) were very high (R2>0.981). Therefore, we conclude that ESI, based on fast response and the more commonly used accurate climatic microsensors (Ta, RH, SR) which can be combined in a small portable device, has the potential to be a practical alternative to the WBGT.

Original languageEnglish
Pages (from-to)427-431
Number of pages5
JournalJournal of Thermal Biology
Volume26
Issue number4-5
DOIs
StatePublished - 2001
Externally publishedYes

Keywords

  • Heat-stress
  • Index
  • Radiation
  • Temperature
  • WBGT

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