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Jan

16

2009
 
 

Field of Gleams



Shinier crops could cool the earth

Shining CropsFarm fields with bling may be the next big thing in agriculture, if scientists from the University of Bristol have their say. In Current Biology, they propose that farmers fight climate change by planting crops that reflect more sunlight back to space.

The authors note that some varieties of corn, wheat, and barley have leaves that are especially reflective. So why not breed crops to maximize this effect? Farmers already pick seed strains that yield the juiciest tomatoes and wheat that’s good for making bread. All they’d have to do is add another criteria to their list.

Inserting such a change into a global climate model, the authors found that glimmering fields could cool summertime temperatures in much of Europe, North America, and Asia by up to one degree Celsius–enough to relieve the worst droughts and heat waves. The reduction is equivalent to offsetting one-fifth of the seasonal regional warming expected by the end of the century. In other words, this “bio-geoengineering” approach might be a relatively cheap and simple way to beat the heat. —Jessica Leber

Source: Ridgwell, A. et al. 2009. Tackling Regional Climate Change By Leaf Albedo Bio-geoengineering. Current Biology DOI: 10.1016/j.cub.2008.12.025

Image © Ian Bracegirdle Photography / iStock.com

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