The 2014 National Climate Assessment predicted that many U.S. communities will
see extreme precipitation events more often as global temperatures rise.
At the state level, Rhode Island, New Hampshire, Massachusetts, Vermont, New York and Louisiana
all saw extreme precipitation events increase in frequency by more than 50 percent.
Not exact matches
It also has
seen a 71 percent increase in the frequency of
extreme precipitation events — more than any other region in the United States, according to the paper.
Still, he says, «One of the clearest signals we
see is that an increase in global temperatures leads to an increase in
extreme or heavy
precipitation events.»
With rising global temperatures, the 2014 National Climate Assessment predicts that many communities will
see more frequent
extreme precipitation events like the one that hit Baton Rouge, La., last year.
3:28 p.m. Updated I contacted Kevin Trenberth, a climate scientist at the National Center for Atmospheric Research who was just interviewed by Joe Romm on
extreme precipitation and warming, to
see if he thinks it's appropriate to call such storms «global warming type»
events.
2: Our Changing Climate).48, 190 Increases in both
extreme precipitation and total
precipitation have contributed to increases in severe flooding
events in certain regions (
see Ch.
Maine could also
see two to three times more
extreme precipitation events, defined as four inches over 48 hours, said Wake.
It is instructive to compare these numbers with those characteristic of a set of the years during 1979 — 2012 with no or only one major regional
extreme event (in terms of land surface temperature and land
precipitation anomalies) in the NH midlatitudes, from late April / early May to late September / early October, as reported yearly since 1993 in the World Meteorological Organization statements on the status of the global climate (
see also ref.
Because we may
see really
extreme precipitation events, with very powerful atmospheric rivers, that dump a ton of rain and put us in danger of devastating floods, we need to continue investing in our flood management infrastructure.
Changes in some types of
extreme events have already been observed, for example, increases in the frequency and intensity of heat waves and heavy
precipitation events (
see FAQ 3.3).
Indicators based on daily
precipitation data show more mixed patterns of change but significant increases have been
seen in the
extreme amount derived from wet spells and number of heavy rainfall
events.