Sentences with phrase «aerosol cloud»

The ash and aerosol clouds from large volcanic eruptions spread quickly through the atmosphere.

There have been some regional aerosol clouds due to mankind's activity.

This would require dust and aerosol clouds which would stay in the upper atmosphere blocking the sun for thousands of years, which seems very unlikely.

If you like, you can read a discussion of the relative inputs to aerosol clouds here.

Jasper Kirkby and colleagues present the first results from the CLOUD experiment at CERN, which studies nucleation and other ion - aerosol cloud interactions under precisely controlled conditions.

Using a NASA computer model, Oman tracked the worldwide effects of the sulfate aerosol cloud that formed following the Laki eruption.

At best there were a few regional aerosol clouds covering less than 1 % of the globe.

MacDonald's atlas shows 12 other aerosol clouds all being downwind from desert regions and likely natural.

Stothers, R.B., 1997: Stratospheric aerosol clouds due to very large volcanic eruptions of the early twentieth century: Effective particle sizes and conversion from pyrheliometric to visual optical depth.

«Surprisingly, these brown aerosol clouds seem to have potent climate consequences that affect the entire region,» Lau said.

In fact, these «brown clouds» — soot - filled aerosol clouds — have been increasing atmospheric warming over India by about 50 %.

«There is nothing inherently wrong with defining aerosol changes to be a forcing, but it is practically impossible to accurately determine the aerosol forcing because it depends sensitively on the geographical and altitude distribution of aerosols, aerosol absorption, and aerosol cloud effects for each of several aerosol compositions.

The top panel shows the direct effects of the individual components, while the second panel attributes various indirect factors (associated with atmospheric chemistry, aerosol cloud interactions and albedo effects) and includes a model estimate of the «efficacy» of the forcing that depends on its spatial distribution.

Oman, L., A. Robock, G. Stenchikov, T. Thordarson, D. Koch, D. Shindell, and C. Gao, 2006: Modeling the distribution of the volcanic aerosol cloud from the 1783 Laki Eruption.

Investigators are least certain of the climatic influence of something called the aerosol cloud albedo effect, in which aerosols from human origins interact with clouds in complex ways and make the clouds brighter, reflecting sunlight back to space.

The sulfuric acid condensed into minute droplets — each two hundred times finer than the width of a human hair — that could easily remain suspended in the air as an aerosol cloud.

Had the aerosol cloud ascended only into the lowest part of the atmosphere, the troposphere, where clouds form, rain would soon have cleansed the ash from the air.

The sheer power of the jet stream allowed the aerosol cloud to circumnavigate Earth in two weeks; but the cloud did not remain coherent.

While it took only two weeks for the aerosol cloud to cover the globe at the equator, it was likely more than two months before it reached the North and South Poles.

Ultraviolet light would quickly kill the virus in an aerosol cloud, he argued — and if it had somehow survived, it would have infected more than just one crew member aboard the ship.

The formation and properties of the aerosol cloud that sits above the monsoon are a major unknown in climate science, and their potential future changes represent one of the largest uncertainties in climate predictions.

Like many earlier eruptions, we know they were tropical eruptions if volcanic deposits are found for the same year in ice cores at both the North and South Poles — that only happens if the aerosol makes it into the tropical stratosphere (where large - scale air currents ultimately distribute the aerosol cloud into both hemispheres — there are some really nice satellite images of this process for the ’91 Pinatubo eruption).

A few days ago a paper (Sato et al) dealing with some aspects of the «Aerosol Cloud Interactions», (ACI, also called «aerosol indirect effects») was released.

Volcanoes eject their aerosol cloud directly into the stratosphere where they cause warming at first and then cooling a few years later.

The protective layers of the atmosphere, most specifically the ozone layer and the ionosphere, are being shredded by the aerosol clouds.