Figure : extreme-precipitation-increased-across-much-united-states

Extreme Precipitation Has Increased Across Much of the United States

Figure -.6

Cooperative Institute for Climate and Satellites - NC
Kenneth E. Kunkel

This figure appears in chapter executive-summary of the Climate Science Special Report: The Fourth National Climate Assessment: Volume I report.

These maps show the percentage change in several metrics of extreme precipitation by NCA4 region, including (upper left) the maximum daily precipitation in consecutive 5-year periods; (upper right) the amount of precipitation falling in daily events that exceed the 99th percentile of all non-zero precipitation days (top 1% of all daily precipitation events); (lower left) the number of 2-day events with a precipitation total exceeding the largest 2-day amount that is expected to occur, on average, only once every 5 years, as calculated over 1901–2016; and (lower right) the number of 2-day events with a precipitation total exceeding the largest 2-day amount that is expected to occur, on average, only once every 5 years, as calculated over 1958–2016. The number in each black circle is the percent change over the entire period, either 1901–2016 or 1958–2016. Note that Alaska and Hawai‘i are not included in the 1901–2016 maps owing to a lack of observations in the earlier part of the 20th century. (Figure source: CICS-NC / NOAA NCEI). Based on figure 7.4 in Chapter 7.

Free to use with credit to the original figure source.

This figure was created on June 26, 2017.

This figure was submitted on October 25, 2017.


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