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Introduction <br />Historical Conditions <br />California's serious water shortages, brought on in part by drought conditions, have persisted over time. <br />California's climate has been heating up and periods of drought have been deepening and lengthening. <br />Using surface temperature data, a team led by University of Maryland atmospheric chemist Clark weaver <br />calculates that California, since 1895, has been growing warmer at a rate of about 2.1° Fahrenheit per <br />century. The warming sped up over that time: From 196o to today, the rate is 4.8° per century. <br />62 <br />60 <br />58 <br />California <br />900 1920 1940 1960 1980 2000 2020 <br />Additionally, an August zozo study in Environmental Research Letters finds that since 1979, there have <br />been rising temperatures and falling average precipitation. The researchers report trends for the months <br />of September, October, and November (SON) in both temperatures (up about 1' Celsius) and precipitation <br />(down an average of 30 percent). <br />bend = 0.030 <br />pva1 ue = 0.0 15 <br />980 11990 2000 2010 <br />treed = -1,203 <br />pvalue= 0.095 <br />1980 1990 2000 2010 <br />P a g e 11 October 2021 <br />