Refreeze Graphic (IMAGE) Columbia Climate School Caption Scientists hypothesize that cold temperatures and high pressures push the water uphill, in the same direction as overlying ice flows. This causes ridgelines to refreeze, thus warding off erosion. Credit Tim Creyts 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.