Unit:
Κατεύθυνση Φυσική ΠεριβάλλοντοςLibrary of the School of Science
Supervisors info:
Sotiropoulou Georgia, Assistant Professor, Department of Physics, NKUA
Platon Patlakas, Co-Lecturer, Department of Physics, NKUA
Elissavet Bossioli, Assistant Professor, Department of Physics, NKUA
Original Title:
Effects of Secondary Ice Processes on a Medicane Evolution
Translated title:
Effects of Secondary Ice Processes on a Medicane Evolution
Summary:
In this study, a case of cyclogenesis that took place over the central
Mediterranean Sea during 6-10 November 2014, is being examined. The pre-
existing low-level depression obtained a Tropical-Like Cyclone structure on 7
November 2014 and affected mostly Sicily and Malta. Baroclinic instability
appeared to be important for its formation, combining deep convection with
upper-level dynamics such as a dynamic tropopause anomaly.
The medicane is simulated by the non-hydrostatic Weather Research &
Forecasting Model (WRF). Satellite and reanalysis products are further used
for the model evaluation.
Intense cyclonic activity in the Mediterranean often results in heavy
precipitation: especially in cases of extreme storms like the medicanes,
precipitation often results in floodings associated with severe damage and
even human casualties. While there is continuous effort to understand the
dynamic evolution of these systems, little is known about the underlying
microphysical, cloud-scale processes, which cannot be resolved explicitly and
have to be parameterized in atmospheric models.
In this study we investigate the impact of Secondary Ice Production (SIP)
processes, which are ice multiplication mechanisms that have been frequently
linked to the onset of heavy precipitation and generation of high concentration
of precipitation particles. While Hallett-Mossop, is the only SIP process
extensively implemented in atmospheric models, our results reveal that the
impact of additional three SIP mechanisms which are not represented in the
default version of WRF, is significant for the evolution of the medicane.
Main subject category:
Science
Keywords:
Medicane, precipitation, microphysical processes, Secondary Ice Production (SIP)
Number of references:
105
File:
File access is restricted until 2024-10-10.
thesis.pdf
52 MB
File access is restricted until 2024-10-10.
