Global climate change is occurring at an accelerating pace, and the global greenhouse gas (GHG) emissions that are forcing climate change continue to increase.

This report addresses some of the major questions facing climate change researchers, and how those puzzles are being addressed by NSF-funded activities. Complex computer models are being developed and refined to predict Earth

An unexpected and unwelcome Indian contribution to climate change is beginning to be highlighted: that of so-called black carbon (or, more colloquially, soot) which, according to recent studies, may account for almost 1/5 of global warming

Plans to cool the planet by creating a sunshade could cut the amount of electricity generated by solar power.

More radiation generally increases vegetation photosynthesis, but field studies show that a given amount of diffuse radiation leads to more fixed carbon than direct radiation.

educing emissions of black carbon and other short-lived pollutants that contribute to global warming could buy the world crucial time while governments begin the slow overhaul of global energy systems that will be required to reduce emissions of CO2, climate modelers reported in Nature Geosciences.

Fundamental to the onset of the Indian Summer Monsoon is the land-sea thermal gradient from the Indian Ocean to the Himalayas-Tibetan Plateau (HTP). The timing of the onset is strongly controlled by the meridional tropospheric temperature gradient due to the rapid pre-monsoon heating of the HTP compared to the relatively cooler Indian Ocean.

Greenhouse gases (GHGs) warm the surface and the atmosphere with significant implications for rainfall, retreat of glaciers and sea ice, sea level, among other factors. About 30 years ago, it was recognized that the increase in tropospheric ozone from air pollution (NOx, CO and others) is an important greenhouse forcing term.

Traffic is one of the major sources of harmful airborne particles worldwide. To relate exposure to adverse health effects it is important to determine the deposition probability of the inhaled particles in the human respiratory tract.

WASHINGTON - Visibility on clear days has declined in much of the world since the 1970s thanks to a rise in airborne pollutants, scientists said on Thursday.

They described a "global dimming" in particular over south and east Asia, South America, Australia and Africa, while visibility remained relatively stable over North America and improved over Europe, the researchers said.

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