Controlling land-based water recycling can offer new ways to wet large areas. But how much can we regreen a place for it to make a difference?
Wetsus and UU Copernicus institute scientists found a local moisture recycling ratio (LMR). Calculated as the fraction of evaporated moisture that precipitates within 50 km of its source. A much greater resolution than before. They confirmed that wetness, orography, latitude, convective available potential energy, wind speed, and total cloud cover are correlated with LMR.
The results – highlight that wet region with little wind and strong ascending air favor high LMR. And a map that can tell where adding trees will and will not help local precipitation.
Theeuwen, J.J.E., A. Staal, O.A. Tuinenburg, B.V.M. Hamelers, S.C. Dekker. 2023. “Local Moisture Recycling across the Globe.” Hydrology and Earth System Sciences 27 (7): 1457–76. https://doi.org/10.5194/hess-27-1457-2023.