Sentences with phrase «other aerosols in the atmosphere»

Furthermore, while soot on the snow / ice surface will enhance melt, soot and other aerosols in the atmosphere have a cooling effect that would slow melt.

Not exact matches

By analyzing satellite data and other measures, Daniel and his colleagues found that such aerosols have been on the rise in Earth's atmosphere in the past decade, nearly doubling in concentration.

How much radiation is reflected by sulphur dioxide aerosols varies according to the size of the droplets, their height in the atmosphere, whether it is night or day, what season it is and several other factors.

In particular, they propose that cloud changes associated with aerosol particles in the atmosphere could be causing the weekend effect, though other pollution processes can not be ruled out at this timIn particular, they propose that cloud changes associated with aerosol particles in the atmosphere could be causing the weekend effect, though other pollution processes can not be ruled out at this timin the atmosphere could be causing the weekend effect, though other pollution processes can not be ruled out at this time.

A few of the main points of the third assessment report issued in 2001 include: An increasing body of observations gives a collective picture of a warming world and other changes in the climate system; emissions of greenhouse gases and aerosols due to human activities continue to alter the atmosphere in ways that are expected to affect the climate; confidence in the ability of models to project future climate has increased; and there is new and stronger evidence that most of the warming observed over the last 50 years is attributable to human activities.

Other aerosols can bring about temporary atmospheric cooling, mainly by seeding clouds that linger in the atmosphere longer than they normally would, or by scattering light.

Aerosols are also produced when molecules in the gaseous state enter the atmosphere and react with other chemicals, he adds.

And we now have a gloomier picture of the extent to which smogs and other human - made aerosols in the atmosphere shade us from the worst of global warming.

Various aerosols also rise up in the atmosphere, but their net effect on global warming or cooling is still uncertain, as some aerosols reflect sunlight away from Earth, and others, in contrast, trap warmth in the atmosphere.

The PNNL study measured how, in the atmosphere, these aerosols interact with and mix with other volatile or semi-volatile organic compounds, the carbon - centric chemicals that evaporate from both natural and human - made sources.

Maybe one could add instead: «This downward radiation from greenhouse gases (and some fine solid air particles («aerosols») e.g. can be measured at the surface in nights with clear sky and no other radiation sources in the atmosphere (e.g. Philipona and Dürr 2004 doi / 10.1029 / 2004GL020937).

If carbon dioxide and other long - lived greenhouse gases were not building up in the atmosphere, we would not be particularly worried about the climate effect from the short - lived gases and aerosols.

It hardly takes imagination to posit that while initial aerosol dimming might depress temperatures, the aerosols and atmosphere might react in ways that change heat balance in other directions as they disperse, through stratospheric chemistry, and the fact that, unsurprisingly, there is a difference in aerosol behaviour depending on day vs night (you can't reduce the sunlight that reaches the south pole on June 23rd....).

The effect of both CO2 and aerosols by mass in the atmosphere are not linear and do not follow each other in lock step, hence to claim that aerosols would have a cancelling effect no matter what the rate of fossil fuel combustion would be a false assumption.

We've changed the atmosphere in other ways, mainly by adding ozone and aerosols at the ground, and destroying ozone high in the atmosphere with CFCs.

These analyses indicate that it is likely that greenhouse gases alone would have caused more than the observed warming over the last 50 years of the 20th century, with some warming offset by cooling from natural and other anthropogenic factors, notably aerosols, which have a very short residence time in the atmosphere relative to that of well - mixed greenhouse gases (Schwartz, 1993).

Not it is not similar because one event injected sulfate aerosols into the stratosphere where they stayed for years and affected the globe while the other («human particulates and aerosol pollution») were produced in the troposphere and have a residency time in the atmosphere of about 4 days and had only a regional effect.

Some models include volcanic effects by simply perturbing the incoming shortwave radiation at the top of the atmosphere, while others simulate explicitly the radiative effects of the aerosols in the stratosphere.

The meeting will mainly cover the following themes, but can include other topics related to understanding and modelling the atmosphere: ● Surface drag and momentum transport: orographic drag, convective momentum transport ● Processes relevant for polar prediction: stable boundary layers, mixed - phase clouds ● Shallow and deep convection: stochasticity, scale - awareness, organization, grey zone issues ● Clouds and circulation feedbacks: boundary - layer clouds, CFMIP, cirrus ● Microphysics and aerosol - cloud interactions: microphysical observations, parameterization, process studies on aerosol - cloud interactions ● Radiation: circulation coupling; interaction between radiation and clouds ● Land - atmosphere interactions: Role of land processes (snow, soil moisture, soil temperature, and vegetation) in sub-seasonal to seasonal (S2S) prediction ● Physics - dynamics coupling: numerical methods, scale - separation and grey - zone, thermodynamic consistency ● Next generation model development: the challenge of exascale, dynamical core developments, regional refinement, super-parametrization ● High Impact and Extreme Weather: role of convective scale models; ensembles; relevant challenges for model development

Like other tiny atmospheric particles called aerosols, black carbon (BC) has a short lifetime in the atmosphere of about a week because it is removed by rain or snow.

As humankind adds carbon dioxide, aerosol particles, and other nasty things to the atmosphere, we can expect our climate to change over the 21st Century, but it's not easy to predict how fast the climate should change and how it will change in different parts of the world.

As we (and a number of other mainstream news outlets) reported, Robert Kaufmann and colleagues analysed the impact of growing coal use, particularly in China, and the cooling effect of the sulphate aerosol particles emitted into the atmosphere.

In the mid-20th century, coal - burning power plants and other sources released huge amounts of sulfur dioxide, which then formed toxic sulfate aerosols in the atmospherIn the mid-20th century, coal - burning power plants and other sources released huge amounts of sulfur dioxide, which then formed toxic sulfate aerosols in the atmospherin the atmosphere.

As part of that calculation, researchers have relied on simplifying assumptions when accounting for the temperature impacts of climate drivers other than carbon dioxide, such as tiny particles in the atmosphere known as aerosols, for example.»

Aerosols have both natural and human sources, so if we just assume aerosol concentration variation in the atmosphere will continue as it has for the last 165 years, then future AGW can be projected with TCR (1 + beta) where beta is the historical fraction of CO2 radiative forcing caused by all other GHG and aAerosols have both natural and human sources, so if we just assume aerosol concentration variation in the atmosphere will continue as it has for the last 165 years, then future AGW can be projected with TCR (1 + beta) where beta is the historical fraction of CO2 radiative forcing caused by all other GHG and aerosolsaerosols.

At least two «counterfactual» ensembles will be simulated in addition to that: one with the greenhouse gas response removed, representing the «world that might have been» without anthropogenic greenhousre gas forcing and the other one without some key climate relevant aerosols in the atmosphere.

Natural Variability Doesn't Account for Observed Temperature Increase In it's press release announcement, NASA points out that while there are other factors than greenhouse gases contributing to the amount of warming observed — changes in the sun's irradiance, oscillations of sea surface temperatures in the tropics, changes in aerosol levels in the atmosphere — these factors are not sufficient to account for the temperature increases observed since 188In it's press release announcement, NASA points out that while there are other factors than greenhouse gases contributing to the amount of warming observed — changes in the sun's irradiance, oscillations of sea surface temperatures in the tropics, changes in aerosol levels in the atmosphere — these factors are not sufficient to account for the temperature increases observed since 188in the sun's irradiance, oscillations of sea surface temperatures in the tropics, changes in aerosol levels in the atmosphere — these factors are not sufficient to account for the temperature increases observed since 188in the tropics, changes in aerosol levels in the atmosphere — these factors are not sufficient to account for the temperature increases observed since 188in aerosol levels in the atmosphere — these factors are not sufficient to account for the temperature increases observed since 188in the atmosphere — these factors are not sufficient to account for the temperature increases observed since 1880.

They are referring to a 1971 article written by climatologist Stephen Schneider, in which he did, indeed, make that prediction; however, as he himself now acknowledges, new evidence soon followed its publication that suggested that 1) the cooling impact of aerosols was not nearly as high as originally estimated and 2) there were many other gases in the atmosphere, including methane, CFCs and ozone, that had the same warming effect as carbon dioxide.

- > was that the apparent halt in GW seized on by Carter, was due to the extra heat going into the oceans rather than the atmosphere, and that other heat was being reflected by aerosols, and that Carter was overlooking these.