Future
change of precipitation extremes in Europe: Intercomparison of scenarios from regional climate models.
Not exact matches
The 2007 International Panel on Climate
Change (IPCC), the most authoritative source
of climate science, spelled out the likely consequences
of inaction, including
extreme heat and
precipitation, droughts, and rising seas.
Attributable human - induced
changes in the likelihood and magnitude
of the observed
extreme precipitation during Hurricane Harvey.
These findings from University
of Melbourne Scientists at the ARC Centre
of Excellence for Climate System Science, reported in Nature Climate
Change, are the result of research looking at how Australian extremes in heat, drought, precipitation and ocean warming will change in a world 1.5 °C and 2 °C warmer than pre-industrial condi
Change, are the result
of research looking at how Australian
extremes in heat, drought,
precipitation and ocean warming will
change in a world 1.5 °C and 2 °C warmer than pre-industrial condi
change in a world 1.5 °C and 2 °C warmer than pre-industrial conditions.
Human - induced climate
change, which affects temperature,
precipitation and the nature
of extreme events, is increasingly driving biodiversity loss and the reduction
of nature's contributions to people, worsening the impact
of habitat degradation, pollution, invasive species and the overexploitation
of natural resources.»
While the majority
of climate
change scientists focus on the «direct» threats
of changing temperatures and
precipitation after 2031, far fewer researchers are studying how short - term human adaptation responses to seasonal
changes and
extreme weather events may threaten the survival
of wildlife and ecosystems much sooner.
Although the rising average global surface temperature is an indicator
of the degree
of disruption that we have imposed on the global climate system, what's actually happening involves
changes in circulation patterns,
changes in
precipitation patterns, and
changes in
extremes.
Expected increases in
extreme heat and drought events will bring
changes in
precipitation, air and water temperatures, air density and humidity, write Matthew Bartos and Mikhail Chester in the current issue
of the research journal Nature Climate
Change.
Key weather and climate drivers
of health impacts include increasingly frequent, intense, and longer - lasting
extreme heat, which worsens drought, wildfire, and air pollution risks; increasingly frequent
extreme precipitation, intense storms, and
changes in
precipitation patterns that lead to drought and ecosystem
changes (Ch.
But beyond the increased amount
of precipitation, Wehner adds, «this study more generally increases our understanding
of how the various processes in
extreme storms can
change as the overall climate warms.»
As the 2014 Intergovernmental Panel on Climate
Change report notes, models predict that increasing temperature ought to cause greater
precipitation extremes in both directions — both drought and flooding, though there are likely more areas
of heavy
precipitation.
Daniel Swain and colleagues model how the frequency
of these rapid, year - to - year transitions from
extreme dry to wet conditions — which they dub «
precipitation whiplash events» — may
change in California's future as a consequence
of man - made warming.
-- Along with analyzing historical trends in temperature and
precipitation, we performed an analysis
of changes in
extreme climate events since the middle
of last century.
This is addressed by evaluating
change in global or large - scale patterns in the frequency or intensity
of extremes (e.g., observed widespread intensification
of precipitation extremes attributed to human influence, increase in frequency and intensity
of hot
extremes) and by event attribution methods.
Areas
of expertise: Global and regional climate
change and variability; analysis
of extreme climate and weather events (e.g.
precipitation, drought, tropical and mid-latitude storms); climatic signal decomposition methods
Her work focuses on the causes
of change in mean and
extreme temperature and
precipitation.
Anthropogenic climate
change is expected to have an impact on these types
of events: warm temperature
extremes and heavy
precipitation extremes have -LSB-...]
In the second real - time
extreme weather attribution study in the context
of the World Weather Attribution project the team found a 5 - 80 % increase in the likelihood
of heavy
precipitation like those associated with storm Desmond to occur due to anthropogenic climate
change.
Rising CO2 levels have been linked to the globe's average temperature rise as well as a host
of other
changes to the climate system including sea level rise, shifts in
precipitation, ocean acidification, and an increase in
extreme heat.
This influence
of climate
change on some
extremes, including especially heat waves and heavy
precipitation and some kinds
of storm and flood events must no longer be waved away, swept under the rug, or otherwise ignored.
They discussed the effect
of variables being non-iid on the
extreme value analysis, and after taking that into account, propose that
changes in
extreme precipitation are likely to be larger than the corresponding
changes in annual mean
precipitation under a global warming.
In part because
of large intrinsic variability, no evidence was found for
changes in
extreme precipitation attributable to climate
change in the available observed record.»
Second Assessment
of Climate
Change for the Baltic Sea Basin https://books.google.com/books?isbn=3319160060 The BACC II Author Team averaged frequency
of extreme 1 - day
precipitation totals above 15 mm and a... 4.6 Cloudiness and Solar Radiation 4.6.1 Cloudiness Records
of cloudiness and solar... There is a trend
of decreasing cloud cover over the Baltic Sea basin......
No single weather event can be attributed to climate
change, but a warming climate does load the dice in favor
of heavier
extreme precipitation events.
Because
of the limited availability
of daily observations, however, most previous studies have examined only the potential detectability
of changes in
extreme precipitation through model — model comparisons (12 — 15).
These results are based on a comparison
of observed and multi-model simulated
changes in
extreme precipitation over the latter half
of the twentieth century analyzed with an optimal fingerprinting technique.
Some
of the differences were touched on in my recent coverage
of new analysis attributing some
changes in
extreme precipitation in the Northern Hemisphere to human - driven global warming.
Changes in
precipitation regimes and
extreme events can cause ecosystem transitions, increase transport
of nutrients and pollutants to downstream ecosystems, and overwhelm the ability
of natural systems to mitigate harm to people from these events.
Changes in extreme precipitation projected by models, and thus the impacts of future changes in extreme precipitation, may be underestimated because models seem to underestimate the observed increase in heavy precipitation with w
Changes in
extreme precipitation projected by models, and thus the impacts
of future
changes in extreme precipitation, may be underestimated because models seem to underestimate the observed increase in heavy precipitation with w
changes in
extreme precipitation, may be underestimated because models seem to underestimate the observed increase in heavy
precipitation with warming.
In particular, the report authors predicted that with climate
change there would be an increase in certain types
of extreme weather, including daily high temperatures, heat waves, heavy
precipitation and droughts, in some places.
Whether climate
change is expressed as a rise in temperatures, or as
changing precipitation patterns — it is at the
extreme edges
of the graph that the frequency
of weather events suddenly multiplies dramatically.
Impact
of Global Warming Sea level rising Altered
precipitation pattern
Change in soil moisture content Increase in some
extreme weather More flood more.
Warming temperatures,
changes in
precipitation, and more
extreme weather are projected to increase populations
of disease - carrying vectors like mosquitoes with West Nile Virus and
of the types
of bacteria and toxic algae that contaminate shellfish and recreational waters for activities like swimming and boating.
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 %).
No
changes in
extreme precipitation attributable to climate
change were found for the observational period, in large part because
of significant year - to - year variability.
Given projected increases in the frequency and intensity
of extreme precipitation events in the Midwest (Chapter 2: Our
Changing Climate, Key Message 6), 57 it appears that sewer overflow will continue to constitute a significant current health threat and a critical source
of climate
change vulnerability for major urban areas within the Midwest.
2: Our
Changing Climate, Key Message 5).2 Regional climate models (RCMs) using the same emissions scenario also project increased spring
precipitation (9 % in 2041 - 2062 relative to 1979 - 2000) and decreased summer
precipitation (by an average
of about 8 % in 2041 - 2062 relative to 1979 - 2000) particularly in the southern portions
of the Midwest.12 Increases in the frequency and intensity
of extreme precipitation are projected across the entire region in both GCM and RCM simulations (Figure 18.6), and these increases are generally larger than the projected
changes in average
precipitation.12, 2
Precipitation extremes and their potential future
changes were predicted using six - member ensembles
of general circulation models (GCMs) from the Coupled Model Intercomparison Project Phase 5 (CMIP5).
Peer - reviewed literature about the effects
of climate
change are in broad agreement that air and surface water temperatures are rising and will continue to do so, that ice cover is declining steadily, and that
precipitation and
extreme events are on the rise.
Key weather and climate drivers
of health impacts include increasingly frequent, intense, and longer - lasting
extreme heat, which worsens drought, wildfire, and air pollution risks; increasingly frequent
extreme precipitation, intense storms, and
changes in
precipitation patterns that lead to drought and ecosystem
changes (Ch.
In the second real - time
extreme weather attribution study in the context
of the World Weather Attribution project the team found a 5 - 80 % increase in the likelihood
of heavy
precipitation like those associated with storm Desmond to occur due to anthropogenic climate
change.
This post was originally published on this site Today the journal Nature Climate
Change published results
of a groundbreaking paper that explores the
changing character
of precipitation extremes in California.
The relationship between SSTs and spatial gradients in
changes in (
extreme)
precipitation is an important finding for analysing necessary measures to anticipate future
changes in the spatial and temporal distribution
of rainfall in the country.
Output from global circulation models indicates that climate variability will continue to be an important characteristic
of the region in the future [52], but that climate
change may increase the risk
of extreme climatic events such as multi-decade droughts and
extreme winter
precipitation [53], [54].
Shifts in the probability
of extreme drought seasons generally tracked median
precipitation changes; however, some regions skewed toward drought conditions even where median
precipitation changes were small.
«We're seeing increasing temperatures and relatively little
change in average
precipitation, but an increase in the variability and the occurrence
of both wet and dry
extremes,» said Daniel Swain, an atmospheric scientist at Stanford's School
of Earth, Energy & Environmental Sciences and the lead author
of a new paper published in Science Advances.
Overall, the scientists found that
precipitation extremes of different kinds will occur, with only small
changes in the mean
precipitation across the rainy season.
Of the types of extremes that battered the country this year, only certain large - scale phenomena among them — such as heat waves, droughts and heavy precipitation — have links to climate chang
Of the types
of extremes that battered the country this year, only certain large - scale phenomena among them — such as heat waves, droughts and heavy precipitation — have links to climate chang
of extremes that battered the country this year, only certain large - scale phenomena among them — such as heat waves, droughts and heavy
precipitation — have links to climate
change.
A reduced snow cover extent in the mountainous West
changes the peak river flow, as does timing
of increases in heavy and
extreme precipitation reported in the United States, which is best reflected during the warm season.
Although many areas
of the globe have not been analysed, and considerable data remain inaccessible, enough data have been analysed to confirm some basic properties
of the
changes in
extreme precipitation.