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Your search keyword '"Charlson, R. J."' showing total 9 results
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9 results on '"Charlson, R. J."'

1. THE CALIPSO MISSION : A Global 3D View of Aerosols and Clouds

Author

Winker, D. M., Pelon, J., Coakley, J. A., Ackerman, S. A., Charlson, R. J., Colarco, P. R., Flamant, P., Fu, Q., Hoff, R. M., Kittaka, C., Kubar, T. L., Le Treut, H., Mccormick, M. P., Mégie, G., Poole, L., Powell, K., Trepte, C., Vaughan, M. A., and Wielicki, B. A.

Published
2010

3. Reply

Author

Penner, J. E., Charlson, R. J., Hales, J. M., Laulainen, N. S., Leifer, R., Novakov, T., Ogren, J., Radke, L. F., Schwartz, S. E., and Travis, L.

Published
1994

5. Reply

Author

Charlson, R. J. and Pilat, M. J.

Published
1971

6. Aerosols and Global Warming

Author

Kellogg, William W., Charlson, R. J., Schwartz, S. E., Hales, J. M., Cess, R. D., Coakley,, J. A., Hansen, J. E., and Hofmann, D. J.

Published
1992

8. Laboratory Studies and Numerical Simulations of Cloud Droplet Formation under Realistic Supersaturation Conditions.

Author

Stratmann, F., Kiselev, A., Wurzler, S., Wendisch, M., Heintzenberg, J., Charlson, R. J., Diehl, K., Wex, H., and Schmidt, S.

Subjects
TROPOSPHERIC thermodynamics, ATMOSPHERIC water vapor, CLOUDS, ATMOSPHERIC research, NUMERICAL analysis, METEOROLOGY
Abstract

In this paper, a new device is introduced to study the formation and growth of cloud droplets under heal atmospheric supersaturations. The new device, called the Leipzig Aerosol Cloud Interaction Simulator (LACIS), is based on a laminar flow tube. It has been designed to reproduce the thermodynamic conditions of atmospheric clouds as realistically as possible. A series of experiments have been conducted that Dove the definition and stability of the flow field inside the LACIS as well as the stability and reproducibility of the generated droplet size distributions as a function of the applied thermodynamic conditions. Measured droplet size distributions are in good agreement with those determined by a newly developed Eulerian particle-droplet dynamical model. Further investigations will focus on the influences of latent beat release during vapor condensation on the tube walls and the development of a more suitable optical particle counter for droplet size determination. [ABSTRACT FROM AUTHOR]

Published
2004
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9. Can chemical effects on cloud droplet number rival the first indirect effect?

Author

Athanasios Nenes, Charlson, R. J., Facchini, M. C., Kulmala, M., Laaksonen, A., and Seinfeld, J. H.

Subjects
Aerosols, atmospheric chemistry, Surface tension, aerosol, Accommodation coefficients, cloud droplet, Cloud droplet number, cloud microphysics, Soluble substances, complex mixtures, Organic substances, Number concentration, Solubility, Clouds, Ambient aerosols, sense organs, Chemical effects, Drops, Cloud droplet activation, Cloud droplet number concentrations, albedo
Abstract

An increase in cloud droplet number concentration resulting from an increase in ambient aerosol (and subsequent albedo increase) is typically identified as the first indirect (or "Twomey") climatic effect of aerosols [Twomey, 1974]. A key question is whether chemical effects (dissolution of soluble gases and slightly soluble substances, surface tension depression by organic substances and accommodation coefficient changes) could potentially rival changes in droplet number from changes in aerosol number concentration. We assess the sensitivity of cloud droplet number concentration to such chemical factors, using a cloud parcel model. We find that numerous conditions exist, for which chemical influences on cloud droplet activation can indeed rival the Twomey effect.

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