| |
 |
UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2025-04-04 21:03 |
 |
|
|
|
Conference: Bucharest University Faculty of Physics 2007 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
A climatology of sounding derived parameters associated with deep, moist convection
Authors:
Bogdan Antonescu
Carolina Oprea
Affiliation:
National Meteorological Administration
E-mail
bogdan.antonescu@meteo.inmh.ro
Keywords:
sounding,climatology,lapse rate,shear
Abstract:
Our primary goal in this paper is to determine the relationships between sounding-derived parameters and thunderstorm occurrence in the southern part of Romania. In order to determine this relationship we used proximity sounding analysis, a tool to determine environmental conditions associated with different kinds of weather events and to discriminate between them. For Bucharest-Afumati we define a proximity sounding as being within 185 km of the sounding release location, and during the period from 0900 UTC to 1500 UTC (6-hour period centered on the 1200 UTC sounding). Cloud-to-ground lightning data from National Lightning Detection Network and reports from weather station situated in the proximity area, are used to categorize soundings as representative of conditions for no thunder, general thunder and severe. Among the detailed calculations are correlation between the cloud-to-ground lightning activity and convective indices (CAPE, CIN, LI, etc.). Lapse rates for several different layers are inspected to determine the utility of using static stability versus CAPE to forecast thunderstorm. Lastly, low-level shear is studied in an attempt to distinguish between severe and general thunder episodes.
|
|
|
|