Sentences with phrase «reduce precipitation»

After a political scientist unjustifiably labeled his mainstream views «zombie science,» the President's Science Advisor, Dr. John P. Holdren, explained in an extended debunking how climate change worsens Western droughts even if it doesn't reduce precipitation (see here and below).

All this isn't «proof» that human caused climate change helped shift and reduce precipitation in California during its record - setting drought.

Furthermore, it is suggested that aerosols with high absorptivity such as black carbon absorb solar radiation in the lower atmosphere, cool the surface, stabilise the atmosphere and reduce precipitation (Ramanathan et al., 2001).

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.

And white roofs can reduce precipitation as well, by reducing the amount of warm, humid air rising and, thus, the number of clouds and eventual rainfall.

Indeed, conventional wisdom held that higher levels of aerosol pollution in the atmosphere should cool the earth's climate because aerosols can increase cloudiness; they not only reduce precipitation, which raises the water content in clouds, but they also increase the size of the individual water droplets, which in turn causes more warming sunlight to be reflected back into space.

«Ones that keep temperature from changing reduce precipitation, and ones that keep precipitation from changing don't reduce the temperature,» he said.

That shift caused warmer temperatures in the north - west US, fewer storms in the south - east, and reduced precipitation in the west — conditions that persisted for about a decade.

Researchers attributed this to reduced precipitation and snow melt, a change in the type of crops being cultivated and hotter temperatures.

Already a water - stressed part of the country, this region is projected to experience reduced precipitation by midcentury.

«This cooling reduced precipitation over Africa, and in combination with a range of other complex climate feedback mechanisms tipped the humid system towards aridification,» explains the first author of the study, James Collins from Helmholtz Centre Potsdam — GFZ German Research Centre for Geosciences and Alfred Wegener Institute — Helmholtz Center for Polar and Marine Research (AWI) in Bremerhaven.

It caused warmer temperatures in the north - west US, fewer storms in the south - east, and reduced precipitation in the west — conditions that persisted for about a decade.

Research shows that reduced precipitation is already holding back wheat yields.

Soil water deficits, from increased temperatures and reduced precipitation, can result in larger pathogen populations and lower tree and forest defenses against pathogens (Lorio 1993; Chakraborty et al. 2008).

August is also the month when westerly winds begin to replace offshore breezes, a period known locally as the «Little Dry» with reduced precipitation and abundant sunshine.

The indirect effect, as it is simulated in this model, reduces precipitation efficency and helps keep rel.

US precipitation deficits remain large in the second winter while the region of reduced precipitation shifts northeastward.

Researchers project a combination of higher temperatures, increased evaporation and reduced precipitation that could, in 70 years, increase burned areas in California by up to 125 percent.

For California, this particular meteorological setup is especially effective at reducing precipitation.

It is worth noting that the PDO is currently in a negative phase, which historically favors reduced precipitation across much of California during ENSO - neutral years.

By extrapolating from its radiative forcing in the current climate, we estimate that dust reduces precipitation during glacial times by as much as half the reduction due to the colder climate alone.

«MCB changes the precipitation rates globally and in regions of reduced precipitation — notably the Amazon but also South East Asia — we would expect an increase in crop failures.

Thus, there is a strong potential that the added dust in the atmosphere during this drought could have intensified the drought by reducing precipitation over the plains.

Even in light of the complexities and uncertainties, Hulme et al. (2001) state that a «warming climate will nevertheless place additional stresses on water resources [in Africa], whether or not future rainfall is significantly altered» and they project reduced precipitation over Tunisia.

Scidev.net: Scientists in Saudi Arabia say that by the end of 2050 parts of the country will be hotter and have reduced precipitation, which could affect agricultural productivity.

The scientists attributed most of the change to a rise in temperature and the remainder to reduced precipitation.

What Jimmy D also ignores is that ice mass loss can also be due to: a) reduced precipitation b) reduced albedo due to reduced cloudiness (goes together with reduced precipitation) c) reduced albedo due to soot and / or volcanic ash, both of which have been seen in the last five years d) other local phenomena

Scientists who advocate human - CO2 caused global warming predicted that African regions, such as the Lake Victoria area, would suffer from reduced precipitation because of the warming.

One high - priority activity in phase one will explore how tropical forests respond to reduced precipitation, which is expected in some tropical regions.

An increase in aerosols of similar hygroscopicity leads to an increase in cloud droplet number concentration that reduces the precipitation efficiency for warm clouds.

Although rising temperatures are an underlying factor, glaciologists find a complex cycle at work: A warming Pacific Ocean has created disruptive El Nino climate periods more frequently and powerfully, reducing precipitation, including snows to replenish glaciers.

The warming over southern Africa may also be a result of reduced precipitation.

This result suggests that the reduced precipitation has caused drier soils, which in turn have enhanced the warming owing to reduced cooling by evaporation.

The areas with enhanced warming over the USA may also be caused by drier soils from reduced precipitation, although the poor model agreement in precipitation changes for this region means this conclusion is uncertain.

For example, increased precipitation in already well - watered areas can increase concerns about drainage and water - logging (Parkinson and Mark, 2005), while reduced precipitation in areas already subject to water shortages could lead to infrastructure crises.

The study, based on a computer model used to simulate rainfall under different land - use conditions, found that cutting down tropical forests in West Africa reduces precipitation over neighboring forest areas by about 50 percent due to increased temperatures over cropland areas.

Not exact matches

«Understanding which factors lead to more or less [precipitation] and how this happens is critical to developing infrastructure to capture more water, reduce flooding, et cetera,» Kimberly Prather, a study author who holds appointments at the Scripps Institution of Oceanography and the department of chemistry and biochemistry at UC San Diego, wrote in an email.

Aerosol particles also reduce solar radiation penetration to the surface, which can suppress precipitation.

«As powerful as the cycle is, it is also surprisingly susceptible to environmental changes — and humankind is imposing massive perturbations on Amazonia by both cutting down the trees and heating up the air with greenhouse gases, which reduces large - scale moisture transport and precipitation, and end up affecting even the untouched patches of the forests.»

In particular, human - induced aerosols like soot and combustion particulates actually work the opposite, reducing the amount of precipitation clouds can form.

Standard laboratory DNA isolation methods, such as sonication, ribonuclease (RNase) treatment, and ethanol precipitation may reduce the available pool of DNA enough to prevent recovering usable sequences from the oldest samples.

The increased production in these crops is driven by higher precipitation predicted to occur in the central U.S., combined with higher concentrations of carbon dioxide, which reduces a plant's water requirements.

The combination of higher evaporation and lower precipitation depletes soil moisture and reduces runoff, making droughts more intense and more frequent.

Less precipitation leads to reduced runoff for communities, industry and agriculture.

In South America, lower precipitation, which reduces the growth of plants, was largely responsible.

Changes in precipitation and temperatures are likely to reduce habitat suitability for some tree species, including iconic species such as American beech, eastern hemlock, eastern white pine, red spruce, and sugar maple.

At the opposite end of precipitation extremes, drought also poses risks to public health and safety.192 Drought conditions may increase the environmental exposure to a broad set of health hazards including wildfires, dust storms, extreme heat events, flash flooding, degraded water quality, and reduced water quantity.

Projected shifts in temperature and precipitation are likely to reduce diffuse recharge to the Fox Hills — Hell Creek aquifer and accelerate the current depletion by water users.

Spring precipitation as rain or snow can also help to augment years of relatively low winter snow and prevent reduced streamflow.

With higher precipitation, portions of this snow may not melt during the summer and so glacial ice can form at lower altitudes and more southerly latitudes, reducing the temperatures over land by increased albedo as noted above.