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A Plan for a Research Program on Aerosol Radiative Forcing by National Research Council, Division on Earth and Life

By National Research Council, Division on Earth and Life Studies, Environment and Resources Commission on Geosciences, Panel on Aerosol Radiative Forcing and Climate Change

Panel on Aerosol Radiative Forcing and weather swap, surroundings and assets fee on Geosciences, department in the world and existence reports, nationwide learn Council

This ebook recommends the initiation of an "integrated" examine application to check the function of aerosols within the anticipated worldwide weather switch. present figuring out recommend that, even now, aerosols, essentially from anthropogenic resources, can be lowering the speed of warming because of greenhouse fuel emissions. as well as particular study strategies, this e-book forcefully argues for 2 types of learn application integration: integration of the person laboratory, box, and theoretical examine actions and an built-in administration constitution that comprises the entire involved federal organizations.

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Boers et al. (1994) examined monthly mean CCN concentration in marine boundary layer air at Cape Grim, Tasmania, versus optical depth of low marine clouds derived from satellite data; a trend of increasing optical depth with increasing CCN was found. Kim and Cess (1993), in evaluating monthly averaged albedo for low-level marine clouds as obtained from the Earth Radiation Budget Experiment (ERBE) for regions of the North Pacific and North Atlantic versus regions of the Southern Hemisphere, found albedo enhancement in coastal areas influenced by anthropogenic emissions.

1993) on cloud droplet size distributions upwind and downwind of Denver, Colorado. They found that the droplet size distribution in the downwind air was shifted to smaller diameters than that of the nonurban air (median volume diameter of 14 versus 28 µm) and the droplet concentration was increased by an order of magnitude (22 versus 226 cm-3). Hudson and Li (1995) found significantly higher droplet number concentrations, and smaller mean drop diameters, in "polluted" clouds compared to "nonpolluted" clouds.

Polarization lidar observations by Sassen (1992) in the northern midlatitudes following the Pinatubo eruption indicate that resulting changes in upper-tropospheric aerosols may have modified the microphysical and optical characteristics of upper-tropospheric clouds. Inferences from Stratospheric Aerosol Research Major volcanic eruptions provide a test of our ability to model climate change caused by transient, near-global, aerosol-induced perturbations. For the Pinatubo eruption, the fact that both computed forcing and modeled response of the climate system are in reasonable agreement with observations is encouraging.

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