Výsledky vyhledávání - "R. I. Albrecht"

Akademický článek

Illustration of microphysical processes in Amazonian deep convective clouds in the gamma phase space: introduction and potential applications

Publikováno v: Atmospheric Chemistry and Physics, Vol 17, Pp 14727-14746 (2017)

The behavior of tropical clouds remains a major open scientific question, resulting in poor representation by models. One challenge is to realistically reproduce cloud droplet size distributions (DSDs) and their evolution over time and space. Many

Externí odkaz: https://doaj.org/article/9727efb2428746a398bb0c0c13f9c020

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Akademický článek

Further evidence for CCN aerosol concentrations determining the height of warm rain and ice initiation in convective clouds over the Amazon basin

Autor: R. C. Braga, D. Rosenfeld, R. Weigel, T. Jurkat, M. O. Andreae, M. Wendisch, U. Pöschl, C. Voigt, C. Mahnke, S. Borrmann, R. I. Albrecht, S. Molleker, D. A. Vila, L. A. T. Machado, L. Grulich

Publikováno v: Atmospheric Chemistry and Physics, Vol 17, Pp 14433-14456 (2017)

We have investigated how aerosols affect the height above cloud base of rain and ice hydrometeor initiation and the subsequent vertical evolution of cloud droplet size and number concentrations in growing convective cumulus. For this purpose we us

Externí odkaz: https://doaj.org/article/ac41c3f549ac41c59f10261b8d763bce

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Akademický článek

Sensitivities of Amazonian clouds to aerosols and updraft speed

Autor: M. A. Cecchini, L. A. T. Machado, M. O. Andreae, S. T. Martin, R. I. Albrecht, P. Artaxo, H. M. J. Barbosa, S. Borrmann, D. Fütterer, T. Jurkat, C. Mahnke, A. Minikin, S. Molleker, M. L. Pöhlker, U. Pöschl, D. Rosenfeld, C. Voigt, B. Weinzierl, M. Wendisch

Publikováno v: Atmospheric Chemistry and Physics, Vol 17, Pp 10037-10050 (2017)

The effects of aerosol particles and updraft speed on warm-phase cloud microphysical properties are studied in the Amazon region as part of the ACRIDICON-CHUVA experiment. Here we expand the sensitivity analysis usually found in the literature by

Externí odkaz: https://doaj.org/article/a06cc8dd280a488496fec24461de81b3

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Akademický článek

Comparing parameterized versus measured microphysical properties of tropical convective cloud bases during the ACRIDICON–CHUVA campaign

Autor: R. C. Braga, D. Rosenfeld, R. Weigel, T. Jurkat, M. O. Andreae, M. Wendisch, M. L. Pöhlker, T. Klimach, U. Pöschl, C. Pöhlker, C. Voigt, C. Mahnke, S. Borrmann, R. I. Albrecht, S. Molleker, D. A. Vila, L. A. T. Machado, P. Artaxo

Publikováno v: Atmospheric Chemistry and Physics, Vol 17, Pp 7365-7386 (2017)

The objective of this study is to validate parameterizations that were recently developed for satellite retrievals of cloud condensation nuclei supersaturation spectra, NCCN(S), at cloud base alongside more traditional parameterizations connecting

Externí odkaz: https://doaj.org/article/2a62222ecb014fe68bf265ac5470abb2

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Akademický článek

Effect of bacterial ice nuclei on the frequency and intensity of lightning activity inferred by the BRAMS model

Autor: F. L. T. Gonçalves, J. A. Martins, R. I. Albrecht, C. A. Morales, M. A. Silva Dias, C. E. Morris

Publikováno v: Atmospheric Chemistry and Physics, Vol 12, Iss 13, Pp 5677-5689 (2012)

Many studies from the last decades have shown that airborne microorganisms can be intrinsically linked to atmospheric processes. Certain bacteria may constitute the most active ice nuclei found in the atmosphere and might have some influence on the f

Externí odkaz: https://doaj.org/article/4f0ff5707df6410a8af8ea61cde430f9

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