Sentences with phrase «about atmospheric aerosols»

Schneider coauthored a 1971 article in the journal Science about atmospheric aerosols — floating particles of soil dust, volcanic ash, and human - made pollutants.

Not exact matches

Non-polar glacial ice holds a wealth of information about past changes in climate, the environment and especially atmospheric composition, such as variations in temperature, atmospheric concentrations of greenhouse gases and emissions of natural aerosols or human - made pollutants... The glaciers therefore hold the memory of former climates and help to predict future environmental changes.

«Scientists have talked about Arctic melting and albedo decrease for nearly 50 years,» said Ramanathan, a distinguished professor of climate and atmospheric sciences at Scripps who has previously conducted similar research on the global dimming effects of aerosols.

The results may help to explain discrepancies between observations and theories about how volatile organic compounds produced by vegetation are converted into atmospheric aerosol — especially over forested regions.

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.

Scientists use data from the SGP to learn about cloud, aerosol, and atmospheric processes, which in turn leads to improvements in models of the Earth's climate.

This method tries to maximize using pure observations to find the temperature change and the forcing (you might need a model to constrain some of the forcings, but there's a lot of uncertainty about how the surface and atmospheric albedo changed during glacial times... a lot of studies only look at dust and not other aerosols, there is a lot of uncertainty about vegetation change, etc).

Ice sheet albedo forcing is estimated to have caused a global mean forcing of about — 3.2 W m — 2 (based on a range of several LGM simulations) and radiative forcing from increased atmospheric aerosols (primarily dust and vegetation) is estimated to have been about — 1 W m — 2 each.

The trouble is that there remains little empirical evidence to support the idea, as we were surprised to find out when we talked to UC San Diego atmospheric physicist Veerabhadran Ramanathan about his research showing that another type of aerosol — black carbon — had a significant warming effect:

Differences in future atmospheric burdens and radiative forcing for aerosols are dominated by divergent assumptions about emissions from South and East Asia.

In turn, these optical depths may be used to derive information about the column abundances of ozone and water vapor, as well as aerosol and other atmospheric constituents.

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.

Putting those two, theoretical, processes together with some shaky assumptions about aerosols, clouds and other atmospheric phenomena, and arriving at an assumption that the theoretical minor warming of CO2 is tripled is what concerns a true skeptic.

In principle, at least, the recent results from the CLOUD project at CERN provide information about the role of ionizing particles in «sensitizing» atmospheric aerosols which might, later, give rise to cloud droplets.

A short while ago, Eli posted about Finnish research on the formation of small atmospheric aerosols.

Would you care to explain to me why you are confident about the estimates of atmospheric aerosol levels that are available for that period?

We need to know more about things like continental distribution, ocean currents, ice sheet coverage, solar output, atmospheric composition for other relevant species — O3, CH4, and H2O just to name a few — not to mention dust, and aerosols.

The ENA is providing a rare, long - term data set about the response of these low clouds to changes in atmospheric greenhouse gases and aerosols — a major source of uncertainty in global and regional climate models.

The annual average is about 0.25 of the peak — but you expect as well that the reflected SW would not vary as much as you suggest albedo of oceans being influenced by «solar zenith angle, wind speed, transmission by atmospheric cloud / aerosol, and ocean chlorophyll concentration.»

Additionally, solar spectral measurements provide information about atmospheric composition including column concentrations of trace gases and aerosol optical properties and optical depths.

In about ten years both ocean heat accumulation and atmospheric aerosol effects should be much better defined (assuming that the Glory Mission finally launches successfully).

«Scientists have talked about Arctic melting and albedo decrease for nearly 50 years,» said Ramanathan, a distinguished professor of climate and atmospheric sciences who has previously conducted similar research on the global dimming effects of aerosols.