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.
The projections also indicate an increase in the basin - averaged precipitation and an increase in the frequency
of extreme precipitation events over the region as a whole.
In addition to the immediate health hazards associated with
extreme precipitation events when flooding occurs, other hazards can often appear once a storm has passed.
Our state level analyses of
extreme precipitation events shows a strong increasing trend since the 1950s, with 40 of 48 states showing at least some increasing incidence.
«This increase in water vapor has contributed to increasing total precipitation in the fall season, but does not necessarily mean an increase
in extreme precipitation events,» she added.
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.
«We know that in particular that [the regions around] Houston, Louisiana, and Florida are prone to some of the
most extreme precipitation events in the United States,» said Sarah Kapnick, a researcher at NOAA's Geophysical Fluid Dynamics Laboratory.
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.
The results indicate that
extreme precipitation events consistently increase by the middle of the twenty - first century for all return periods (49 — 52 %), but changes may become more profound by the end of the twenty - first century (81 — 101 %).
Nearly all studies to date published in the peer - reviewed literature agree that
extreme precipitation event number and intensity have risen, when averaged over the United States.
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).
The estimated return time of the 3 - day precipitation event exceeds 50 years over a large region, and an increase in the occurrence of
similar extreme precipitation events is projected by the end of the 21st century.
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.
And sea level rise is one of the most conclusive impacts of climate change that can lead to more urban flooding in coastal areas, as well
as extreme precipitation events.
Here is an excerpt of the research paper, «When It Rains It Pours», from Environment America, showing a statistically significant spike in flash flooding and
other extreme precipitation events since 1948: «Weather records show that storms with extreme precipitation have become more frequent over the last 60 years.
In the most absurd case of Pielke misdirection, Field accurately reports the SREX findings
on extreme precipitation events, which Pielke Jr. purports is a misrepresentation because of something that report said about flood losses.
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.
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.
Every time you have
an extreme precipitation event, whether it's rain or snowfall or whatever, look at the cost of cleaning up.
In some other parts of the world, climate change was linked, although in a small way, to
extreme precipitation events.
Our study shows is that increases in the number of extreme heat and
extreme precipitation events, particularly during summer months, lead to more asthma hospitalizations in Maryland.»
Similarly,
extreme precipitation events during summer months increased the risk of asthma hospitalizations by 11 %.
Based on over a decade of asthma hospitalization data (115,923 cases from 2000 - 2012), researchers observed higher risk of asthma hospitalization after extreme heat or
extreme precipitation events.
Climate scientists know that the intensity of
extreme precipitation events is on the rise because there's more water vapor in the atmosphere caused by higher global and sea temperatures.
Computer models showed a reduction in what Edwards called «
extreme precipitation events» in the fall season in western South Dakota when compared to climate conditions in the 1800s.
At PNNL, our scientists are studying atmospheric rivers, which are the narrow bands of tropical moisture that stream toward the West Coast of the United States each winter and often contribute to
extreme precipitation events.
This rhythm in storm frequency may explain some of the recently observed increases in
extreme precipitation events.
Here is an interesting report on the links between tropical temperatures and increased likelihood of
extreme precipitation events:
Add in the extreme floods last year (a period not included in the study) and you have more relevance, although Roger Pielke Jr. this morning notes the importance of distinguishing between analysis of certain kinds of
extreme precipitation events and disastrous flooding.