Improved bora wind simulation using a nested Eta Model |
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| Authors: | I To?i? L Lazi? |
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| Institution: | (1) Present address: The St.-Petersburg Research Centre of Ecological Safety/the Nansen International Centre of Environment and Remote Sensing, Korpusnaya Str., 18, 197042 St. Petersburg, Russia;(2) Present address: St. Petersburg Trade Academy, St. Petersburg, Russia;(3) Present address: Atmospheric Physics Department, Institute of Physics, St. Petersburg State University, Russia |
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| Abstract: | Summary In connection with a number of recent publications on  anomalous (excessive) absorption of shortwave radiation (SWR) by clouds, the data of aircraft observations of spectral and total SWR vertical profiles in the troposphere obtained within the CAENEX, GAAREX and FGGE programmes have been discussed. These data demonstrated persuasively the existence of substantial SWR absorption by clouds in the visible wavelength region. In this context, the results of simulation numerical medelling of the SWR transfer in clouds have been considered. These show a significant enhancement of the SWR absorption by clouds due to an increase of the mean free path of photons under an impact of multiple scattering in clouds. Another important consideration may be the impact of SWR-absorbing pollutants in clouds, especially soot aerosols.With 4 Figures |
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