The American River Current

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  • R

    Robert HansenMar 16, 2016 at 4:05 pm

    According to the Union of Concerned Scientists, Global warming affects evapotranspiration—the movement of water into the atmosphere from land and water surfaces and plants due to evaporation and transpiration— which is expected to lead to:

    Increased drought in dry areas. In drier regions, evapotranspiration may produce periods of drought—defined as below-normal levels of rivers, lakes, and groundwater, and lack of enough soil moisture in agricultural areas. Precipitation has declined in the tropics and subtropics since 1970. Southern Africa, the Sahel region of Africa, southern Asia, the Mediterranean, and the U.S. Southwest, for example, are getting drier. Even areas that remain relatively wet can experience long, dry conditions between extreme precipitation events.
    Expansion of dry areas. Scientists expect the amount of land affected by drought to grow by mid-century—and water resources in affected areas to decline as much as 30 percent. These changes occur partly because of an expanding atmospheric circulation pattern known as the Hadley Cell—in which warm air in the tropics rises, loses moisture to tropical thunderstorms, and descends in the subtropics as dry air. As jet streams continue to shift to higher latitudes, and storm patterns shift along with them, semi-arid and desert areas are expected to expand.

  • C

    Carl martinMar 12, 2016 at 11:05 am

    Why don’t you look beyond the rhetoric supplied by the state annd research the actual data. On March 8th Folsom lake set an all time high in water level for that date yet you lead with a photo of dried mud. The floodgates at Folsom are open because they’re afraid of losing flood control. Shasta Lake, the largest reservoir in the state, is 75% full and rising rapidly. We are no longer in a drought. We have a water shortage because we don’t have enough storage to support our population and agricultural needs.

    By the way, I do believe the climate is change, but you’re talking two separate problems. A water shortage caused by population growth without parallel infrastructure growth is not a drought.

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