Jet Propulsion Laboratory
California Institute of Technology
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Early data shows the greatest net gain of water over the winter in nearly 22 years, but the state’s groundwater levels still suffer from the effects of years of drought.
US-German Satellites Show California Water Gains After Record Winter
Scientists have predicted that droughts and floods will become more frequent and severe as our planet warms and climate changes, but detecting this on regional and continental scales has proven difficult. Now a new NASA-led study confirms that major droughts and pluvials – periods of excessive precipitation and water storage on land – have indeed been occurring more often.
Warming Makes Droughts, Extreme Wet Events More Frequent, Intense
In a recent study, scientists found that a previously unmeasured source – water percolating through soil and fractured rock below California’s Sierra Nevada mountains – delivers an average of 4 million acre feet (5 cubic kilometers) of water to the state’s Central Valley each year. This underground source accounts for about 10% of all the water that enters this highly productive farmland each year from every source (including river inflows and precipitation).
NASA Measures Underground Water Flowing From Sierra to Central Valley
Researchers have untangled puzzling patterns of sinking and rising land to pin down the underground locations where water is being pumped for irrigation.
NASA Finds New Way to Monitor Underground Water Loss
Decades of drought across the U.S. Southwest has led some scientists to classify the intense, prolonged dryness as a “megadrought.” But drought in North America took a different shape in 2021, affecting areas that do not face long-term or intense drought as often. The northern Great Plains has been coping with drought for months.
Drought in the Northern Great Plains
Focusing on the GRACE and GRACE-FO missions, the award cites the “outstanding leadership of the international consortium in the planning and implementation of the successful Earth gravity missions.”
International Cooperation Award for NASA JPL's Michael Watkins, Michael Gross