Atmospheric aerosols (a mixture of solid or liquid particles suspended in the air medium) are short-lived, with a residence time of about a week in the lower troposphere. Unlike the principal greenhouse gases, aerosols are more concentrated in the source regions and exhibit strong spatial and temporal variations.

As the Group of Eight began discussions on targets for reducing climate emissions, talk was circulating of a possible commitment to limit warming to 2

With their focus on greenhouse gases, atmospheric scientists have largely overlooked lowly soot particles. But black carbon is now a hot topic among researchers and politicians. Jeff Tollefson investigates.

The ambient air we breathe is a mixture of nitrogen and oxygen with minor constituents, like CO2 and trace gases. Pollutants are substances which are not normally present, for example dust, smoke, industrial and automobile exhaust gaseous and particulate matter.

Environmental pollution study was undertaken in the stone crushers of Chitrakoot area, U.P., to assess the dust exposure risk in stone crushers. The stone available in the area is igneous rock based granite.

There is increasing evidence that the amount of solar radiation incident at the Earth's surface is not stable over the years but undergoes significant decadal variations. Here I review the evidence for these changes, their magnitude, their possible causes, their representation in climate models, and their potential implications for climate change.

Particulate solar absorption is a critical factor in determining the value and even sign of the direct radiative forcing of aerosols. The heating to the atmosphere and cooling to the Earth's surface caused by this absorption are hypothesized to have significant climate impacts.

Studies of chronic health effects due to exposures to particulate matter with aerodynamic diameters ? 2.5 ?m (PM2.5) are often limited by sparse measurements. Satellite aerosol remote sensing data may be used to extend PM2.5 ground networks to cover a much larger area.

Central, northern India have a new date with the rains april, May and early June may be the future monsoon months of north and central India. As of now, the official date for the beginning of monsoons is June 29. But there has been a clear increase in rainfall in the months preceding June. This is because the atmosphere in north India is warming at a rate much faster than the rest of

Climate warming has advanced the biological spring and delayed the arrival of biological winter. These changes in the annual cycle of plants and the lengthening of the green-cover season have many consequences for ecological processes, agriculture, forestry, human health, and the global economy.

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