Heat stress standard ISO 7243 and its global application
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TLDR
ISO 7243 has face validity and within limits is applicable worldwide and a 'clothed WBGT' is proposed to account for the effects of clothing.Abstract:
This paper presents heat stress Standard ISO 7243, which is based upon the wet bulb globe temperature index (WBGT), and considers its suitability for use worldwide. The origins of the WBGT index are considered and how it is used in ISO 7243 and across the world as a simple index for monitoring and assessing hot environments. The standard (and index) has validity, reliability and usability. It is limited in application by consideration of estimating metabolic heat and the effects of clothing. Use of the standard also requires interpretation in terms of how it is used. Management systems, involving risk assessments, that take account of context and culture, are required to ensure successful use of the standard and global applicability. For use outdoors, a WBGT equation that includes solar absorptivity is recommended. A 'clothed WBGT' is proposed to account for the effects of clothing. It is concluded that as a simple assessment method, ISO 7243 has face validity and within limits is applicable worldwide.read more
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Journal ArticleDOI
Wet-bulb globe temperature (WBGT)—its history and its limitations
TL;DR: WBGT can provide only a general guide to the likelihood of adverse effects of heat, and a much clearer assessment can be obtained by measuring the individual elements of the thermal environment, and using those measurements to estimate the requirement for evaporative cooling, thelihood of achieving it, and more accurate and comprehensive indices of heat stress.
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Future temperature in southwest Asia projected to exceed a threshold for human adaptability
TL;DR: In this paper, regional climate models for the Persian Gulf indicate that extremes of wet-bulb temperature may exceed a critical threshold for human tolerance with implications for the future human habitability of the region.
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Reductions in labour capacity from heat stress under climate warming
TL;DR: In this paper, the authors show that individual labour capacity has reduced to 90% in peak months owing to environmental heat stress over the past few decades, with most tropical and mid-latitude regions experiencing extreme heat stress.
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The emergence of heat and humidity too severe for human tolerance
TL;DR: The most extreme humid heat is highly localized in both space and time and is correspondingly substantially underestimated in reanalysis products, underscore the serious challenge posed by humid heat that is more intense than previously reported and increasingly severe.
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Calculating Workplace WBGT from Meteorological Data: A Tool for Climate Change Assessment
TL;DR: Compared published methods to calculate outdoor and indoor WBGT from standard climate data, such as air temperature, dew point temperature, wind speed and solar radiation, and recommend the method of Liljegren et al. (2008) for calculating outdoor WBGT when estimating climate change impacts on occupational heat stress at a population level.
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