Geeta Persad

Senior Climate Scientist

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Geeta Persad was a senior climate scientist with the Climate & Energy Program at the Union of Concerned Scientists from 2018 to 2020. In her role, Dr. Persad conducted research and analysis related to climate change in the Western United States.

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Photo: Caltrans

What Climate Change Could Mean for the Future of California’s Springtime Snowpack

Despite the abundant water year we’ve had, over the long term climate change is transforming the California snowpack and will make no-snow snow surveys more common in the future. Not only is climate change making good snow years like this one less likely, it’s also changing what good snow years mean for our water resources. And that’s going to mean a very different April snow survey in the future. Read more >

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Photo: Patrick Dirden/Flickr

Why Wet Weather in California Now Doesn’t Equal Lots of Water for Californians Later

California has been blessed with a wet winter this year. At the time of publishing, most of the state is at or well above the historical average precipitation to date for this time of year and Sierra Nevada snowpack is at more than 140% of historical average. That’s been good news for the California plants, animals, and humans that rely on water to survive and recreate. But lots of precipitation now doesn’t necessarily mean that California will have lots of water when it needs it. That’s because what matters is not only how much water we get, but when and how we get it.

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Photo: Patrick Dirden/Flickr
CA Department of Water Resources
Singh et al., 2013
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Photo: Craig Ulrich/Berkeley Lab

Climate Change and Groundwater: Incorporating Climate Realities and Uncertainties into California’s Groundwater Planning

Climate change is fundamentally transforming the way we manage water in the Western U.S. The recent Fourth California Climate Change Assessment lays out the many pressures facing water managers in California in detail. Luckily, the science available to us today creates opportunities for water managers and others to plan for changing climatic conditions. Read more >

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Voting on I-1631? Here’s How Much Healthier You Could Make Washington’s Climate

The Pacific Northwest has already warmed by at least 1.5°F since the first half of the 20th century. How will I-1631 help? Read more >

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