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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:28 |
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Conference: Bucharest University Faculty of Physics 2024 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
A preliminary study of stratocumulus drizzle parameters over Bucharest-Magurele
Authors:
Genica–Liliana SĂFTOIU (GOLEA) (1,2), Bogdan ANTONESCU (1,3), Sabina ȘTEFAN (1,4), Gabriela IORGA (5,1)
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Affiliation:
(1) University of Bucharest, Faculty of Physics, PO Box MG-11, 077125,Bucharest, Romania
(2) “Horia Hulubei” National Institute for Nuclear Physics and Engineering, IFIN-HH, Reactorului 30, 077125, Bucharest-Magurele, Romania
(3) National Institute for Earth Physics, Calugareni 12, 077125, Bucharest-Magurele, Romania
(4) Academy of Romanian Scientists, 050044, Bucharest, Romania
(5) University of Bucharest, Faculty of Chemistry, Bd. Regina Elisabeta 4-12, 030018, Bucharest, Romania
E-mail
liliana.golea@nipne.ro
Keywords:
stratocumulus clouds, drizzle, Cloudnet, CERES
Abstract:
Stratocumulus clouds are low level clouds which form in the planetary boundary layer. These clouds represent one of the key components of the Earth's radiative balance. Drizzle is light precipitation with liquid droplets having diameters between 40 and 500 µm. Detecting drizzle below stratocumulus clouds is important for studying the transition from cloud water to rainwater, process that is called the autoconversion. The aim of the study was to bring some insights into the early stages of autoconversion process over a suburban area under a strong influence of pollution coming from a large city, Bucharest. Time period for analysis was chosen from December 2019 to December 2020, period which included the COVID-19 pandemic. We have identified cases of stratocumulus clouds using CERES database in the Bucharest-Magurele area and analyzed the meteorological target classification using the Cloudnet algorithm, highlighting the stratocumulus clouds (radar reflectivity), characteristics of stratocumulus clouds (liquid water path) and drizzle parameters (median diameter and number concentration). Following the comparison from the satellite data with Cloudnet, we identified 21 cases with drizzle out of 29 cases with stratocumulus clouds. Results help us better understand drizzle below stratocumulus clouds and might help for parameterization of autoconversion process in the global climate models.
Acknowledgement:
GLSG work was supported by the Romanian Nucleu Programme.
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