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

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

ISBN-10: 030905429X

ISBN-13: 9780309054294

Panel on Aerosol Radiative Forcing and weather swap, setting and assets fee on Geosciences, department in the world and existence stories, nationwide examine Council

This ebook recommends the initiation of an "integrated" study software to check the position of aerosols within the envisioned worldwide weather switch. present figuring out recommend that, even now, aerosols, basically from anthropogenic assets, might be decreasing the speed of warming brought on by greenhouse fuel emissions. as well as particular study suggestions, this ebook forcefully argues for 2 forms of learn software integration: integration of the person laboratory, box, and theoretical examine actions and an built-in administration constitution that consists of all the involved federal enterprises.

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95 (White, 1990). , 1992b). , 1991). , 1991). 1, most anthropogenic sulfate is produced in the Northern Hemisphere. Numerous quantitative estimates of the direct effect of anthropogenic sulfate alone have been made based on models of atmospheric radiative properties. 3 W m-2 for the global average forcing. The two-and three-dimensional models suggest annual average maxima in the Northern Hemisphere midlatitudes from -4 to -11 W m-2. Uncertainties are estimated crudely as a factor of 2. 6 W m-2 globally averaged.

9 W m-2. , 1994b). Consequently, given inadequate uncertainty analyses along with incomplete sensitivity tests, a single best estimate (and its uncertainty) of the global mean forcing is currently unavailable. 3 suggests that the magnitude of the net forcing could be small if the lower magnitudes of sulfate and organic aerosol forcing are combined with the higher values for soot. It is clear that the magnitudes of the uncertainties at present are too large to allow a resolution of this situation and that more measurements About this PDF file: This new digital representation of the original work has been recomposed from XML files created from the original paper book, not from the original typesetting files.

Engardt and Rodhe (1993) compared seasonal mean temperatures during two 20-year periods (1926-1945 versus 1971-1990). 4°C cooler than in regions where the reverse was true. 5°C warmer in the high SOx source regions. Regions of high sulfate concentrations warmed faster than low-sulfate areas in the summer between 1910 and 1940 but cooled more rapidly from 1950 to 1970. Whereas relative cooling in 1950-1970 during summer is consistent with an aerosol forcing, the temperature response for the 1910-1940 period and the winter warming are not.

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A Plan for a Research Program on Aerosol Radiative Forcing and Climate Change by National Research Council, Division on Earth and Life Studies, Environment and Resources Commission on Geosciences, Panel on Aerosol Radiative Forcing and Climate Change


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