Saturday, June 24, 2017

Global risk of deadly heat: Bangkok compared

Publication of this paper "Global risk of deadly heat" in the prestigious Nature Climate Change journal last week 

http://www.nature.com/nclimate/journal/vaop/ncurrent/full/nclimate3322.html

has created a considerable stir. It concludes that a deadly increase in tropical health problems is a likely outcome following man-made global warming.

How well does this hold up for Thailand? This question will be examined here starting with this brief entry showing the results of the Nature study (right) compared to recent years including the record (?) 2016 in Bangkok (left).



Following this study, almost all days in the Bangkok hot seasons (March-June) for the past few years would be categorized as "deadly", that is, they are hotter than the red line which is meant to divide various historical heat waves with and without fatalities. With humidity typically 70 percent, it follows from this study which draws from a global database (not specific to Thailand or other tropical regions) that average daily temperatures of higher than about 27 deg should be classified as "deadly". This line also corresponds closely to a wet bulb temperature of 26. Is this suggestive of fatalities? How does this compare with observations here in Thailand over the past few years, both personal and published by local researchers? Or with standards developed for military training and sports internationally?

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