Precipitation Changes (IMAGE) Princeton University Caption The researchers found that deforestation could mean 20 percent less rain for the coastal Northwest. The figure above shows the change (in millimeters per day) in daily average precipitation after total Amazon deforestation compared to before deforestation. The pink to dark-pink range indicates a drop in precipitation of up 1.6 mm less per day once the Amazon is gone. Areas with statistically significant changes are hatched. Credit Image by David Medvigy Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.