14 Jun '12, 5pm

Big Uncertainties in the Global Water Budget

Big Uncertainties in the Global Water Budget

“We found very big uncertainties in the global water budget estimates,” says Kunstmann. The mean precipitations analyzed in some regions deviate by up to four liters per square meter and day. For comparison: In Germany, about two liters of rain fall per day and square meter on the average. Hence, these models do not allow for a reliable derivation as to when and where how much precipitation occurs. The models do not even provide simple relationships, such as that between the evaporation surplus above the oceans and precipitation above the continents. “Models will continue to tell us with very big uncertainties how much precipitation and, hence, permanently renewed freshwater is available on earth.”

Full article: http://greenbuildingelements.com/2012/06/14/big-uncertain...

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