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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 17:44 |
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Conference: Bucharest University Faculty of Physics 2014 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Characteristics of the ice crystals in cirrus clouds
Authors:
Andreea BOSCORNEA(1,2), Sabina STEFAN(1), S. N. VAJAIAC(1,2)
Affiliation:
1)University of Bucharest, Faculty of Physics, 405 Atomistilor Str., Magurele 077125, P.O. BOX MG-11, Romania
2)National Institute for Aerospace Research “Elie Carafoli” INCAS - Bucharest, Romania
E-mail
boscornea.a@gmail.com
Keywords:
cirrus, airborne, microphysics properties
Abstract:
Characterization of shape and size of ice crystals in terms of their environmental parameters continues to be a subject of extensive research in cloud physics. It is a crucial topic for cloud-climate knowledge. The present study is focused on investigation of the microphysics properties of cirrus clouds based on aircraft measurements in flights over Romania. The aircraft ATMOSLAB - Airborne Laboratory for Environmental Atmospheric Research, property of the National Institute for Aerospace Research "Elie Carafoli" (INCAS), Bucharest, Romania special equipped for research was used for this study. The airborne laboratory is equipped with a Cloud, Aerosol and Precipitation Spectrometer - CAPS (30 bins, 0.51- 50 μm). Data was recorded during 4 flights during winter 2012-2013, spring 2013 and winter 2013-2014. Using state of the art airborne equipments, it was possible to analyze the variation of the major parameters that influencing the life cycle of a cold cloud: temperature, pressure, number concentrations of ice crystals, effective diameters and 2 D images of droplets and ice crystals. In addition, the occurrence of processes as nucleation, accretion and droplet coalescence in cirrus and cirrostratus clouds can be analyzed. The measurements reveal that the cirrus particle size distributions are in all cases bimodal and they are in a strong relation with the temperature variations.
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