[MCN] Heat: At least 2 broad consequences for Earth's most well-studied mammal

[Lance Olsen]

              +++=======Direct consequence======+++
 
“Based on the climatic conditions of those lethal heat events, we identified a global threshold beyond which daily mean surface air temperature and relative humidity become deadly. Around 30% of the world’s population is currently exposed to climatic conditions exceeding this deadly threshold for at least 20 days a year. By 2100, this percentage is projected to increase to ∼48% under a scenario with drastic reductions of greenhouse gas emissions and ∼74% under a scenario of growing emissions. An increasing threat to human life from excess heat now seems almost inevitable, but will be greatly aggravated if greenhouse gases are not considerably reduced. “
 
Camilo Mora et al. Global risk of deadly heat. Nature Climate Change. PUBLISHED ONLINE: 19 JUNE 2017
 
            ========+++ Indirect consequence +++++=======
 
“We used observational data and output from 23 global climate models to show a high probability (>90%) that growing season temperatures in the tropics and subtropics by the end of the 21st century will exceed the most extreme seasonal temperatures recorded from 1900 to 2006. In temperate regions, the hottest seasons on record will represent the future norm in many locations.”
 
“Coping with the short-run challenge of food price volatility is daunting. But the longer-term challenge of avoiding a perpetual food crisis under conditions of global warming is far more serious. “
 
David. S. Battisti  and Rosamond L. Naylor.
Historical Warnings of Future Food Insecurity with Unprecedented Seasonal Heat. 
SCIENCE 9 JANUARY 2009
 

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