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Bringing Climate Projections Down To Size For Water Managers

/in , /by /Earth and Space Science News (Washington D.C.)by Kimberley M. S. Cartier

Models of what global climate will look like in 10, 50, and 100 years get more sophisticated every year. But what will climate change mean for water resources in regional communities? A group of researchers is building tools to help scientists and regional water managers answer that question. “We’ve been developing new models and new techniques…to refine our understanding of the uncertainty in projections going forward—for hydrology, for snowpack, for important water resources, for flood extremes,” said Andy Wood, a hydrometeorologist at the National Center for Atmospheric Research (NCAR) in Boulder, Colo. Wood is the principal investigator of the project. “We’re creating a large set of projections that go forward and tell us about future water security,” he said.

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What Climate Models Get Wrong About Future Water Availability

/in , /by /Earth and Space Science News (Washington D.C.)by Emily Underwood

One of the most challenging questions about climate change is how Earth’s warming atmosphere will affect water availability across the globe. Climate models present a range of possible scenarios—some more extreme than others—which can make it difficult for cities, states, and countries to plan ahead. Now, however, in a new study, Padrón et al. suggest a way to reduce uncertainty using precipitation patterns from the past. A rule of thumb for global warming’s impact on Earth’s water availability that was sometimes proposed in the past was that dry regions will get drier and wet regions will get wetter, also known as the DDWW hypothesis. But mounting evidence suggests the reality is more complicated.

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