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Massive crop failures more likely with global warming

The recent wheat crisis in Russia is a warning sign for potential large-scale global warming impacts. PHOTO COURTESY THE WIKIMEIDA COMMONS.

Holistic approach to agriculture reform needed to avoid  worst-case scenarios

By Summit Voice

SUMMIT COUNTY — Global warming is likely to result in more frequent crop failures like the recent Russian wheat crisis, according to research conducted by the University of Leeds, the Met Office Hadley Centre and University of Exeter.

The worst effects of these events on agriculture could be mitigated by improved farming and the development of new crops, said Dr. Evan Fraser, one of the authors of the study.

“What is becoming clear is that we need to adopt a holistic approach; new crops for a changing climate and better farming practices that can only come about under more favorable socio-economic conditions,” Fraser said. “It appears that more developed countries with a higher gross domestic product tend to evolve more advanced coping mechanisms for extreme events. In China this is happening organically as the economy is growing quickly, but poorer regions such as Africa are likely to require more in the way of aid for such development.”

The researchers zeroed in on China for their study, looking at spring wheat crops in North East China. They used a climate model to make weather projections up to the year 2099 and then looked at the effect on crop yields. In parallel, they looked at socio-economic factors to determine how well farmers were able to adapt to drought.

While the study only looked at crops in China, the authors said the methodology can be applied to many of the other major crop-growing regions around the globe.

The unpredictability of the weather is one of the biggest challenges faced by farmers struggling to adapt to a changing climate. Some areas of the world are becoming hotter and drier, and more intense monsoon rains carry a risk of flooding and crop damage.

A summer of drought and wildfires has dramatically hit harvests across Russia this year, leading the government to place a ban on wheat exports. This led to a dramatic rise prices on the international commodity markets which is likely to cause higher prices of consumer goods.

“Due to the importance of international trade, crop failure is an issue that affects everyone on the planet, not just those in crop-growing regions,” said Dr, Andy Challinor, from the University of Leeds School of Earth and Environment. “More extreme weather events are expected to occur in the coming years due to climate change and we have shown that these events are likely to lead to more crop failures. What we need to do now is think about the solutions.

“It is highly unlikely that we will find a single intervention that is a silver bullet for protecting crops from failure. What we need is an approach that combines building up crop tolerance to heath and water stress with socio-economic interventions.”

The team will now expand their research to look at other crops in different regions and they will look more closely at the reasons why increased GDP appears to protect against drought.

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  1. [...] Massive crop failures more likely with global warming [...]

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