Not exact matches
The aerosols catalyze the formation of ice in the clouds, which could
increase precipitation, although more research needs to be done
on that linkage, Creamean said.
Losing Amazon forest had a significant positive impact
on the neighboring forests in eastern South America, mostly by
increasing the
precipitation there during the Southern Hemisphere summer.
«We realized in 2013 that there was almost no data
on the drought resistance of Amazonian canopy trees, and several recent droughts raised the question of how these trees would fare if climate change caused
increased anomalies in
precipitation.»
«Furthermore, our work focuses
on increases / decreases in temperatures, but similar analyses are needed to estimate consensus changes in other meteorological variables such as
precipitation.
Wahl published a paper in Nature Communications in 2015
on the effects of compound flooding, which is when
increased river discharge,
precipitation and storm surges happen at the same time.
With the 2 - degree temperature
increase, California would not see a noticeable impact
on precipitation patterns.
Given the revised timeline in this region, Willenbring and colleagues determined that the
increased precipitation resulted from changes in the intensity of the sun's radiation
on the Earth, which is based
on the planet's tilt in orbit.
«Plants, animals, and people all depend
on forests and may all face additional challenges as temperatures
increase and
precipitation patterns shift,» said John Shuey, a co-author of the study and Director of Conservation Science for the Indiana Chapter of The Nature Conservancy.
Increasing temperature is likely to lead to increasing precipitation but the effects on storms are l
Increasing temperature is likely to lead to
increasing precipitation but the effects on storms are l
increasing precipitation but the effects
on storms are less clear.
Making the outlook murky is the fact that climate models do not agree
on whether future
precipitation in the Colorado Basin will
increase or decrease.
«Our study has found evidence to the contrary, suggesting that in fact, the future long - term trend based
on paleoclimate reconstructions is likely towards diminishing
precipitation, with no relief in the form of
increased Mediterranean storms, the primary source of annual
precipitation to the region, in the foreseeable future.»
The CO2 physiological response has a dominant role in evapotranspiration and has a major effect
on long - term runoff and soil moisture compared to radiative or
precipitation changes due to
increased atmospheric CO2.
An
increased risk of intense, short - duration rainfall events in mid-latitude regions has been predicted consistently for well over a decade as part of the pattern of human influence
on precipitation.
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.
The study concludes that the growth of the Mauna Kea glacier caused by the AMOC current changes was a result of both colder conditions and a huge
increase of
precipitation on Mauna Kea — triple that of the present — that scientists believe may have been caused by more frequent cyclonic storm events hitting the Hawaiian Islands from the north.
This new research shows the first clear evidence of the long - term effects of pollution particles
on cloud height and thickness, and how those changes both reduce
precipitation in dry regions and
increase precipitation in wet regions.
Rising temperatures and shifts in
precipitation and moisture balance of forests are likely to
increase negative direct effects
on forests, particularly in water - limited systems and in years with low
precipitation.
Projected future shifts in
precipitation are varied, with not all models agreeing
on whether
precipitation will
increase or decrease in Montana.
If local temperature
increases are limited to 1 to 3 °C, some regions, such as Northern Europe and North America, could benefit from a longer growing season, more
precipitation, and less frost, depending
on the crop.
In locations that are accustomed to getting snow during the winter, the total amount of snow each year is already decreasing as the planet warms from
increasing greenhouse gases; the percentage of
precipitation falling as snow is
on the decline, with more of it falling as rain.
The review by O'Gorman et al (3) reports that a 1C
increase in global mean temperature will result in a 2 % — 7 %
increase in the
precipitation rate; the lower values are results of GCM output, and the upper values are results from regressing estimated annual rainfalls
on annual mean temperatures.
The potential risks around sulfate aerosol solar geoengineering include alteration of regional
precipitation patterns, its effects
on human health, and the potential damage to Earth's ozone layer by
increased stratospheric sulfate particles.
Data analyses have found an
increase of drought intensity at many locations [130]--[131] The magnitude of change depends
on the drought index employed [132], but soil moisture provides a good means to separate the effect of shifting seasonal
precipitation and confirms an overall drought intensification [37].
«The rising risk results from decreases in
precipitation, based
on 16 leading climate models, and
increases in water demand, based
on current growth trends.
The direct effects of climate change
on forests include
increased temperatures and shifts in
precipitation that together alter humidity, soil moisture, and water stress.
An
increase of intense
precipitation events has been found
on much of the world's land area [127]--[129].
Half the
increase in urban land across the world over the next 20 years will occur in Asia, with the most extensive change expected to take place in India and China Urban areas modify their local and regional climate through the urban heat island effect and by altering
precipitation patterns, which together will have significant impacts
on net primary production, ecos...
The likelihood of
precipitation making an appearance during your holiday starts off at 5 %
on May 1st and gradually
increases up to 38 % by May 31st, making the first week of May the best time to visit if you want to avoid any wet weather.
The likelihood of
precipitation making an appearance slightly
increases as the month develops, starting off at 78 %
on July 1st and rising up to 89 % by July 31st, making the start of the month the best time to visit if you want to keep rainfall to a minimum.
The probability of
precipitation occurring greatly
increases as the month develops, starting off at 39 %
on June 1st and rising up to 78 % by June 30th.
By looking at the signatures of climate change in
precipitation intensity and comparing that to the internal variability and the observation, the researchers conclude that the probability of intense
precipitation on any given day has
increased by 7 percent over the last 50 years — well outside the bounds of natural variability.
«During November 2011 - January 2012, there is an
increased chance of above - average temperatures across the south - central U.S. with the odds favoring below - average temperatures over the north - central U.S.. Also, above - average
precipitation is favored across the northern tier of states, excluding New England, and drier - than - average conditions are more probable across the southern tier of the U.S. (see 3 - month seasonal outlook released
on 20 October 2011).»
Here is an interesting report
on the links between tropical temperatures and
increased likelihood of extreme
precipitation events:
But total
precipitation (including rain / snow
on the Arctic ocean) is estimated to have
increased with 500 km3 / yr.
They say that that warming will have some adverse consequences (drought, sea - level rise,
increased impulsive
precipitation, and so
on).
The natural oscillations intrigue me because of their potential to dramatically
increase precipitation on shifts, which reduces heat content that may not be accurately reflected in the surface temperature record.
Heavy
precipitation has
increased worldwide, but the effect of this
on flood magnitude has been difficult to pinpoint.
Although data are not complete, and sometimes contradictory, the weight of evidence from past studies shows
on a global scale that
precipitation, runoff, atmospheric water vapor, soil moisture, evapotranspiration, growing season length, and wintertime mountain glacier mass are all
increasing.
So a local spike in
precipitation releases a lot of heat — but as the heat
increases, this negatively affects the vapor - > water transition (
precipitation, or raindrop formation), since warm air holds more water then cool air — and so the limit
on precipitation vis - a-vis the radiative balance of the atmosphere appears.
Further, let's agree that this will
on average cause more
precipitation due to
increased evaporation at these higher temperatures (the best data I have seen say that the
precipitation trend over the continental US — where we have the best long term records — is up 5 - 10 % over the last century).
On the matter of the role of condensation nuclei, a few general circulation models do have some crude representation of nucleation microphysics in their convection or cloud schemes, but it certainly isn't the key factor in the weak
increase of
precipitation with temperature, which is seen in all GCM's including those with very basic representations of convection.
So: The study finds a fingerprint of anthropogenic influences
on large scale
increase in
precipitation extremes, with remaining uncertainties — namely that there is still a possibility that the widespread
increase in heavy
precipitation could be due to an unusual event of natural variability.The intensification of extreme rainfall is expected with warming, and there is a clear physical mechanism for it, but it is never possible to completely separate a signal of external forcing from climate variability — the separation will always be statistical in nature.
«If there are no while zones
on top of the volcanoes, the solar radiation is absorbed, which generated an
increase in temperature and local climate change, like desertification or the inhibition of pluvial
precipitation,» Degaldo told SciDev.net in an interview.
Availability of resources such as usable water will also depend
on changing rates of
precipitation, with decreased availability in many places but possible
increases in runoff and groundwater recharge in some regions like the high latitudes and wet tropics.
«Since the AR4, there is some new limited direct evidence for an anthropogenic influence
on extreme
precipitation, including a formal detection and attribution study and indirect evidence that extreme
precipitation would be expected to have
increased given the evidence of anthropogenic influence
on various aspects of the global hydrological cycle and high confidence that the intensity of extreme
precipitation events will
increase with warming, at a rate well exceeding that of the mean
precipitation..
As temperatures go up,
on average the ratio between
precipitation and evaporation goes down,
increasing droughts.
In commenting
on their findings, the three researchers write that «the large number of stable glacier termini and glacier advances is influenced by positive glacier mass balances in the central Karakoram during the last decade,» citing Gardelle et al. (2012, 2013) and Kaab et al. (2012), which they indicate is «induced by
increasing winter
precipitation and decreasing summer temperatures since the 1960s,» citing Archer and Fowler (2004), Williams and Ferrigno (2010), Bolch et al. (2012), Yao et al. (2012) and Bocchiola and Diolaiuti (2013).
On average in the United States, the amount of rain falling during the heaviest 1 percent of rainstorms has
increased nearly 20 percent during the past 50 years — almost three times the rate of
increase in total
precipitation.4, 5 The Midwest saw an even larger average
increase of 31 percent, surpassed only by the Northeast (at 67 percent).4 Scientists attribute the rise in heavy
precipitation to climate change that has already occurred over the past half - century.6
On a tangent, the claim is made that tropical
precipitation has
increased, but the IPCC said in AR4 that it had decreased.
For the entire Northern Hemisphere, there is evidence of an
increase in both storm frequency and intensity during the cold season since 1950,1 with storm tracks having shifted slightly towards the poles.2, 3 Extremely heavy snowstorms
increased in number during the last century in northern and eastern parts of the United States, but have been less frequent since 2000.11,15 Total seasonal snowfall has generally decreased in southern and some western areas, 16
increased in the northern Great Plains and Great Lakes region, 16,17 and not changed in other areas, such as the Sierra Nevada, although snow is melting earlier in the year and more
precipitation is falling as rain versus snow.18 Very snowy winters have generally been decreasing in frequency in most regions over the last 10 to 20 years, although the Northeast has been seeing a normal number of such winters.19 Heavier - than - normal snowfalls recently observed in the Midwest and Northeast U.S. in some years, with little snow in other years, are consistent with indications of
increased blocking (a large scale pressure pattern with little or no movement) of the wintertime circulation of the Northern Hemisphere.5 However, conclusions about trends in blocking have been found to depend
on the method of analysis, 6 so the assessment and attribution of trends in blocking remains an active research area.