Climate studies only considered temperature, usually and incorrectly attributing changes
caused by precipitation to temperature.
Not exact matches
Climate change is having a dramatic impact on Earth's biodiversity,
by causing rapid fluctuations in temperature and
precipitation that alter species» environments.
The excessive heat increased the rate of water loss
by evaporation and
caused precipitation to shift from snow to rain, leaving a meager snowpack and parched reservoirs.
Acid rain is now
caused by nitric rather than sulfuric acid — and it comes from more sources than the earlier acidic
precipitation did
It also
caused a decrease in
precipitation by approximately 70 - 85 percent on land and a decrease of approximately 5 - 7 °C in seawater temperature at a 50 - m water depth, leading to mass extinction of life forms including dinosaurs and ammonites.
This is achieved
by slow addition of dilute calcium chloride solution into dilute carbonate buffer to induce supersaturation,
causing nucleation and
precipitation of calcium carbonate.
Extreme weather does not prove the existence of global warming, but climate change is likely to exaggerate it —
by messing with ocean currents, providing extra heat to forming tornadoes, bolstering heat waves, lengthening droughts and
causing more
precipitation and flooding.
However, carbon dioxide fertilization isn't the only
cause of increased plant growth — nitrogen, land cover change and climate change
by way of global temperature,
precipitation and sunlight changes all contribute to the greening effect.
Ongoing climate change
caused by human influences will alter the nature of how rain and snow falls; areas that are prone to dry conditions will receive their
precipitation in narrower windows of time.
The case illustrates the challenges involved in attributing
precipitation extremes and storms, which are
caused by multiple factors, Hoerling said.
The researchers developed a novel approach to the issue
by using climate data from the IPCC and directly modeling all of the components that
cause flooding at the coast including, waves, tides, winds blowing over the surface of the ocean and estuaries,
precipitation, and stream flow.
They will look for evidence of temperature changes
caused by ocean circulation patterns in both the North Atlantic and tropical Pacific Oceans, which drive
precipitation in Tibet as well as the Indian monsoons.
'' [S] ea - ice loss of the magnitude expected in the next decades could substantially impact California's
precipitation, thus highlighting another mechanism
by which human -
caused climate change could exacerbate future California droughts,» the study says.
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.
For example, westerly wind and air temperature can
cause a 7 - ounce change in average chick weights, as compared to 3.5 - ounce change
caused by wind speed and
precipitation.
Using a model of water flow into the lake, the researchers found that 60 % of this decline was
caused by climate changes, such as change in
precipitation and temperature, and that the remaining 40 % of the decline could be attributed to water resources development, such as diverting water for irrigation that would otherwise flow into the lake.
It is commonly thought that hydrologic change is driven
by precipitation and radiation changes
caused by climate change, and that as the land surface adjusts, rising temperatures and lower
precipitation will make the planet drier.
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.
The global science community still isn't entirely sure what
caused the repeated cycles — there may have been larger oceans in the northern hemisphere that powered a hydrological cycle (evaporation, condensation,
precipitation), or shorter cycles could've been
caused by volcanic activity or asteroid / comet impacts.
For example, [Kruss 1983] has this to say about the Lewis glacier on Mt. Kenya: «A decrease in the annual
precipitation on the order of 150 mm in the last quarter of the 19th century, followed
by a secular air temperature rise of a few tenths of a degree centigrade during the first half of the 20th century, together with associated albedo and cloudiness variation, constitute the most likely
cause of the Lewis Glacier wastage during the last 100 years.»
I was thinking instead perhaps more easily controlled polar - orbit satellites might be used, which would rotate with some fixed ratio to their orbital period, casting greater shadows at higher latitudes... or some other arrangment... for a targetted offset polar amplification of AGW especially and in particular perhaps avoiding the reduction in
precipitation that can be
caused by SW - radiation - based «GE» (although aerosols that actually absorb some SW in the troposphere while shielding the surface would have the worst effect in that way, I'd think)... strategic distribution of solar shading has been suggested with
precipitation effects in mind, such as here... sorry, I don't have the link (I'm sure I saved it, just as Steve Fish would suggest — but where?).
However, higher temperatures do
cause an increased chance of heavy
precipitation events, and it is likely that the flooding in some of this year's U.S. flooding disasters were significantly enhanced
by the presence of more water vapor in the air due to global warming.
The way I think about is that for
precipitation there is a shift in distribution
caused by increased water vapor.
In the Northeast, «Communities are affected
by heat waves, more extreme
precipitation events, and coastal flooding due to sea level rise and storm surge,» for example, while in the Southeast and Caribbean, «Decreased water availability, exacerbated
by population growth and land - use change,
causes increased competition for water.
the attribution of a specific heavy
precipitation event to human -
caused GHG's is not an extra development in science that is needed to add to the burden of proof regarding the human influence on climate already provided
by the current scientific evidence.»
We propose that the recent disproportionate rise and fall in CO2 growth rate were
caused mainly
by interannual variations in global air temperature (which altered both the terrestrial biospheric and the oceanic carbon sinks), and possibly also
by precipitation.
Also part of the explanation is the claim that more humid air results in more
precipitation, but again I'm unclear on why warmer air can
cause more water to be evaporated, but warmer air does not
by the same mechanism prevent the same water from condensing.
These facts help explain why, in spite of the Earth's air temperature increasing to a level that the IPCC claims is unprecedented in the the past millennium or more, a recent study
by Randall et al. (2013) found that the 14 % extra carbon dioxide fertilization
caused by human emissions between 1982 and 2010
caused an average worldwide increase in vegetation foliage
by 11 % after adjusting the data for
precipitation effects.
For every degree of global warming, the forest needs a 15 percent increase in
precipitation to compensate for the increased drying
caused by warming, according to a recent study.
As noted
by Reager (2016) in A Decade of Sea Level Rise Slowed
by Climate - Driven Hydrology, researchers had determined the seasonal delay in the return of
precipitation to the oceans
causes sea levels to oscillate
by 17 ± 4 mm [~ 0.7 inches] per year.
Under this scenario, peak
precipitation rates are likely to increase
by 25 % as a result of increases in maximum tropical cyclone wind intensities, which in turn
cause higher storm surges.
Most downdrafts associated with thunderstorms, I believe, are
caused by falling
precipitation showers.
Separate research out of the Lawrence Berkeley National Laboratory found that, thanks to climate change, the amount of
precipitation caused by the hurricane could have been nearly 40 percent higher than expected.
al.)
cause precipitation, and these events are both unpredictable and not determined
by global mean temperature.
Urban flooding can be
caused by short - duration very heavy
precipitation.
«Even though California historically has periods of dry and wet years, there isn't an analog for climate extremes like the ones we've observed in recent years, such as those record - breaking prolonged periods of drought following
by periods of intense
precipitation pulses that
cause flooding,» Woodburn said.
Flash floods occur in small and steep watersheds and waterways and can be
caused by short - duration intense
precipitation, dam or levee failure, or collapse of debris and ice jams.
A nice example is a near flooding situation in Northern Netherlands (January 2012),
caused by a combined occurrence of a saturated soil due to excessive antecedent
precipitation, a heavy
precipitation event in the coastal area and a storm surge with a duration of several days that hindered the discharge of excess water from the area.
Alaska's warm spell was
caused by high pressure conditions in the Pacific Ocean, which pushed the warm air and
precipitation that usually ends up in California this time of year into the 49th state.
Of course the * one * model prediction that is argued incessantly is the stratosphere / troposphere temperature gradient, which has been shown can also be
caused by differences in
precipitation and relative humidity.
«You're also correct in pointing out that snow accumulating in the East Antarctic interior is increasing, presumably due to increased
precipitation caused by more humid conditions
caused by warming air.»
Using a simple physical model, O'Gorman suggests that this is due to the balance between two competing effects
caused by the warming: increasing moisture available for humidity and the decreases in the fraction of
precipitation that falls as snow.
They also captured rapid changes in wind speed that occur around the eye of the cyclone, which did not appear to be affected
by any data loss, like what can be
caused by heavy
precipitation in other satellite data.
My guess would be any decline is
caused by ablation and a lack of
precipitation.
New research from an international team of atmospheric scientists published
by Geophysical Research Letters investigates for the first time the possibility of using a «cocktail» of geoengineering tools to reduce changes in both temperature and
precipitation caused by atmospheric greenhouse gases.
There is little evidence for a human influence on
precipitation deficits, but a lot of evidence for a human fingerprint on surface soil moisture deficits — starting with increased evapotranspiration
caused by higher temperatures.
A 2015 study found that warm conditions induced
by human -
caused global warming have already increased the risk of severe drought in California, even in the absence of trends in
precipitation.
The more relevant situation is
precipitation falling at terminal velocity, since that
causes a downdraft countered
by an updraft surrounding it.
[4] Thanks to a strong El Niño that brought near average
precipitation to the northern California, the statewide April 1 snowpack measurement in 2016 showed state water resources at 87 percent of the long - term average; however, the snowpack was not sufficient to undo water deficits
caused by years of drought.
Scientists say the tropical storm was likely intensified
by climate change: rising sea levels means larger storm surges, warmer ocean waters
cause more
precipitation, and unseasonal weather means hurricane season may be lasting longer.