[Needed: 11 Trillion Gallons to Replenish California Drought ](http://science.nasa.gov/science-news/science-at-nasa/2014/16dec_drought/)

John, space measurements are the future of climate data mining and research:

"Spaceborne and airborne measurements of Earth's changing shape, surface height and gravity field now allow us to measure and analyze key features of droughts better than ever before, including determining precisely when they begin and end and what their magnitude is at any moment in time," Famiglietti said. "**That's an incredible advance and something that would be impossible using only ground-based observations.**"