A new study finds that if temperatures rise and more precipitation falls as rain rather than snow, it will reduce the total amount of water in rivers.
It is a surprising observation. One might expect the timing of water flow to change but not the overall volume.
But this is precisely what scientists discovered when they examined the histories of 420 catchment basins in the US spanning the period 1948-2001.
The researchers report their work in the journal Nature Climate Change.