Climate change impacts on agriculture

Marapi , R. Climate change impacts on agriculture

Posted by CEPES in : The Agrarian Journal 150 , April 2013 , Peru

The impacts of climate change on agricultural production are still a matter of debate, given the complexity of the issue and the lack of information . Rainfall changes affect crop yields , especially combined with temperature changes have an effect on the evaporation. Extreme events such as heat waves, extreme cold , prolonged drought , heavy rain , floods, have a negative impact on production. Regarding water resources are anticipated problems in freshwater supply by 2050 , an increase of pronounced water stress in many regions.

The impacts of climate change on agricultural production are still a matter of debate, given the complexity of the issue and the lack of information . Based on the content of the Fourth Report of the International Panel on Climate Change ( IPCC ), FAO summarized as follows the state of knowledge by region :

Rainfall changes affect crop yields , especially combined with temperature changes  have an effect on evaporation. These effects may be somewhat offset by a more efficient use of water, by closing stomata and greater root density level due to a higher carbon dioxide , although there is little analize of this last level of entire ecosystems .

Extreme events such as heat waves, extreme cold , prolonged drought and heavy rains and durable, will have negative effects on production. An increased frequency of extreme events may result in unexpected impacts , early and expanded in the agriculture, with serious consequences for food production .

Regarding water resources are anticipated problems in freshwater supply , an increase of water stress in many regions marked 2050 . Even in areas with increases in precipitation , water supply may be insufficient for the negative effects of variability  seasonal changes in the precipitation, in water quality and flood risk .

 

http://www.larevistaagraria.org/content/los-impactos-del-cambio-clim%C3%A1tico-sobre-la-agricultura

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