80% risk of ‘mega drought’ happening in the US study finds

There is an 80% possibility of a ‘mega drought’ event in the south-west and Central Plains of America within the next 1,000 years, US scientists are predicting.

The study states that climate change will be the main cause of such a prolonged drought event.

“Future droughts will occur in a significantly warmer world with higher temperatures than recent historical events, conditions that are likely to be a major added stress on both natural ecosystems and agriculture,” the study states.

Should temperatures remain increasing in their current directions, agricultural production in the Central Plains and south-west regions could deteriorate rapidly, the study says.

The research was carried out by using the North American Drought Atlas (NADA), a tree ring based research method that reconstructs summer seasons.

The risk of prolonged drought periods was calculated for two periods, from 1950-2000 and 2050-2099.

The study found that for the period 1950-2000 the risk of such a ‘megadrought’ was less than 12% for both the Central Plains and the south-west.

The scientists then found that for the period 2050-2099 there is an 80% chance of a ‘megadrought’ in both regions.

The research was recently published in Science Advances  by scientists from NASA, Cornell University and Columbia University.


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