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Climate Change Assessment for Water Resources Region 03 <br />a) Annual precipitation <br />b) 901' percentile daily <br />precipitation <br />c) Precipitation intensity <br />(annual total / number of <br />precipitation days) <br />d) Number of <br />precipitation days per <br />year <br />30 <br />5 <br />.,a <br />27 <br />23 <br />uhf 1 <br />South Atlantic -Gulf <br />4 <br />3 <br />2; <br />1 <br />51 <br />4F <br />S <br />�r <br />73 <br />5, <br />47 <br />4; <br />'35' <br />27 <br />1 L wovriigtWe F, 1) <br />Figure 2.7. Historical precipitation trends in the 201' century. a.) annual totals, b.) 901' <br />percentile daily, c.) precipitation intensity (annual total /number of precipitation days), and d.) <br />number of precipitation days per year. Note that blue dots indicate positive trend, red circles <br />indicate negative trend, and symbol sizes are scaled to 3% change per decade. The South <br />Atlantic -Gulf Region is within the red oval (Pryor et al., 2009). <br />Brommer et al. (2007) investigated changes in long duration precipitation events over the past <br />century. This study found no significant changes for the South Atlantic -Gulf Region during the <br />201' century, despite such changes quantified for many other areas in the U.S. <br />A number of recent studies have focused more specifically on the southeast region of the U.S., <br />including the South Atlantic -Gulf Region. As above, regional investigations have targeted trends, <br />or changes, in annual precipitation and the occurrence of extreme events. The work of Small et <br />al. (2006) included analysis of the South Atlantic -Gulf Region specifically. These authors <br />investigated for significant trends in various precipitation and flow metrics based on USGS <br />Hydroclimatologic Data Network (HCDN) climate data from 1948 to 1997. Statistically <br />USACE Institute for Water Resources 14 January 9, 2015 <br />