Sentences with phrase «absorbing aerosols»
Absorbing aerosols refer to tiny particles in the air that can absorb or soak up sunlight or heat energy from the environment. These particles include dust, soot, or other pollutants, and they can have an impact on the Earth's temperature and climate. Full definition
We invite studies representing the full range of cloud and absorbing aerosol regimes, including ice clouds, and from recent field experiments.
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A highly - absorbing aerosol reduces the solar radiation reaching the ground, but causes warming at the altitude the aerosol is located at.
Session Description: Clouds adjust to the presence of absorbing aerosols in myriad ways, depending on the large - scale meteorological conditions, the relative vertical location of the clouds and aerosols and aerosol properties.
For absorbing aerosols like soil (or «mineral») dust, radiative forcing at the surface differs substantially from the value at the top of the atmosphere (TOA).
portant not just for absorbing aerosols but also for the gaseous species.
«But another possibility is a contribution from the black carbon and other absorbing aerosols, including dust.»
In the past, numerous studies have identified black carbon aerosols emitted from combustion of fossil fuels and residential biofuels as the dominant light - absorbing aerosol over South Asia.
Prospero, J.M. et al. (2002): Environmental characterization of global sources of atmospheric soil dust identified with the nimbus 7 total ozone mapping spectrometer (TOMS) absorbing aerosol product, Rev. Geophys.
As effective for breathing life back into second -(or third --RRB- day - after - a-wash hair as it is for drawing out beachy waves on day one, this oil - absorbing aerosol spray keeps hair feeling and looking fresh — not crunchy or full of product buildup.
In their calculations, the direct tropo - spheric aerosol effect does not play a large net role, because the moderately absorbing aerosol assumption leads to an offset between its sunlight reflecting and absorbing properties insofar as the top of the atmosphere irradiance change is concerned.
Ocko, IB, V Ramaswamy, P Ginoux, Y Ming, and LW Horowitz (2012), Sensitivity of scattering and absorbing aerosol direct radiative forcing to physical climate factors, J. Geophys.
Reductions of absorbing aerosol pollution from transportation and residential burning would help to reduce global warming and while also improving air quality.
Schuster, G. L., Dubovik, O., and Arola, A.: Remote sensing of soot carbon — Part 1: Distinguishing different absorbing aerosol species, Atmos.
In India and China, where absorbing aerosols have been added, increased rising motions are seen as well as increased subsidence to the south and north (Menon et al., 2002b).
Using a large eddy simulation, Feingold et al. (2005) show that the reduction in net surface radiation and in surface latent and sensible heat fluxes is the most simple explanation of the reduction in cloudiness associated with absorbing aerosols.
The semi-direct effect has been simulated with GCMs and high - resolution cloud - resolving models, since it is implicitly accounted for whenever absorbing aerosols coupled to the radiation scheme are included (Hansen et al., 1997; Lohmann and Feichter, 2001; Jacobson, 2002; Menon et al., 2002b; Penner et al., 2003; Cook and Highwood, 2004; Hansen et al., 2005).
Black carbon has likely played a far more significant role there, because of the contrast between absorbing aerosols deposited on the ice surface, and the high albedo perennial ice cover, and thus in this particular region black carbon has likely been an aggravating factor when it comes to anthropogenic surface warming.
This is especially important for volcanic aerosols, whose TOA forcing is large and comparable to the surface forcing, as opposed to absorbing aerosols like dust where the surface forcing is larger than at TOA.
Careful and comprehensive scientific assessments have clearly demonstrated that the Earth's climate system is changing rapidly in response to growing atmospheric burdens of greenhouse gases and absorbing aerosol particles (IPCC, 2007).
Well - known examples of such cases are the direct radiative forcing of black carbon (BC) and other absorbing aerosols and the changes in latent and sensible heat fluxes due to land - use modifications.
Transportation, especially diesel vehicles, would then become the largest source of absorbing aerosols.
This linear relationship breaks down for absorbing aerosols, which may have small TOA forcing, but disproportionately larger surface forcing due to absorption of solar radiation (Lohmann and Feichter, 2001; Ramanathan et al., 2001a).
Soot is a strong, light - absorbing aerosol that caused global climate changes that triggered the mass extinction of dinosaurs, ammonites, and other animals, and led to the macroevolution of mammals and the appearance of humans.
«But we will need to include the absorbing aerosols in future model predictions.»
This is crucial because the sign of simulated aerosol semidirect effect can change depending on whether the bulk of the absorbing aerosols is present within or above the cloud levels in a model.
Current growth in forcings is dominated by increasing CO2, with potentially a small role for decreases in reflective aerosols (sulphates, particularly in the US and EU) and increases in absorbing aerosols (like soot, particularly from India and China and from biomass burning).
Nations collectively to begin to reduce sharply global atmospheric emissions of greenhouse gases and absorbing aerosols, with the goal of urgently halting their accumulation in the atmosphere and holding atmospheric levels at their lowest practicable value;
We also briefly discuss the complex problem of estimating surface UV radiation in presence of UV - absorbing aerosols.
The position statement opens with the following: «Careful and comprehensive scientific assessments have clearly demonstrated that the Earth's climate system is changing rapidly in response to growing atmospheric burdens of greenhouse gases and absorbing aerosol particles (IPCC, 2007).
absorbing aerosols, which lead to a positive radiative forcing of the troposphere with little net radiative effect at the top of the atmosphere;
Another issue is the potential for light - absorbing aerosols to increase in - cloud absorption of solar radiation and correspondingly decrease the cloud albedo when incorporated inside cloud droplets.
concept is inappropriate to predict the sign or the magnitude of the global mean precipitation changes due to both scattering and absorbing aerosols, which affect precipitation differently in summer and winter.
Moreover, the semi-direct effect is not exclusive to absorbing aerosol, as potentially any radiative heating of the mid-troposphere can produce a similar response in a GCM (Hansen et al., 2005; see also Section 2.8).
They also show that for forcings due to absorbing aerosols, their newly defined forcing is more meaningful than the stratospheric adjusted forcing, in that the climate sensitivity parameter is largely independent of how the absorbing aerosols are vertically distributed, unlike the standard stratospheric adjusted approach.
Alexandrov, M.D., B. Cairns, A.A. Lacis, and B.E. Carlson, 2006: Remote sensing of absorbing aerosols and precipitable water vapor using MFRSR measurements.