WARMER WORLD GETS WETTER

Surprised?


Satellite observations suggest climate models are wrong on rainfall.

Harvey Leifert

Global warming will increase worldwide precipitation by three times the amount predicted by current climate models, according to a study based on two decades' worth of satellite observations.

The discrepancy between the models and the data might mean that the models are wrong. Or it might be that two decades is not long enough to test their predictions. But researchers believe that the work is a step towards understanding the thorny issue of how global temperatures affect rainfall.

Warmer air holds more water. Satellite observations and climate models agree that each rise of 1 °C in global temperatures increases the amount of water vapour in the atmosphere by about 6.5%.

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