Other forms of severe weather are also closely linked to climate change, including a
rise in extreme precipitation events in some regions and increasingly severe droughts in others.
PCIC Climatologist Faron Anslow delivered a talk titled, «Climatology of Extreme Precipitation Events in British Columbia Using a New Comprehensive Climate Dataset» and PCIC Director Francis Zwiers delivered a talk titled, «Future
trends in extreme precipitation events in the Pacific and Yukon Region.»
The freshly released Intergovernmental Panel on Climate Change fifth assessment report found «high confidence» of a «likely» overall increase
in extreme precipitation events in North America.
Another study examined the potential flood damage impacts of
changes in extreme precipitation events using the Canadian Climate Centre model and the IS92a emissions scenario for the metropolitan Boston area in the north - eastern USA (Kirshen et al., 2005b).
Evidence that extreme precipitation is increasing is based primarily on analysis1, 2,3 of hourly and daily precipitation observations from the U.S. Cooperative Observer Network, and is supported by observed increases in atmospheric water vapor.4 Recent publications have projected an
increase in extreme precipitation events, 1,5 with some areas getting larger increases6 and some getting decreases.7, 2
You can also have an increase
in extreme precipitation events, with a whole year's precipitation in just a few storms.»
The rise is related to the increase
in extreme precipitation events.
Hurricanes (50 % higher «destructive potential» in future): Emanuel (1987); a trend had been detected of greater storminess in the North Atlantic 1962 - 1988, Carter and Draper (1988); for more recent work, e.g., Knutson et al. (1998); droughts («severe drought, 5 % frequency today, will occur about 50 % of the time by the 2050s» in the U.S.): Rind et al. (1990); Karl et al. (1995) reported a rise
in extreme precipitation events.