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High‐resolution numerical simulations of the convective system observed in the Lago Maggiore area on 17 September 1999 (MAP IOP 2a)
Author(s) -
Richard Evelyne,
Cosma Stephanie,
Tabary Pierre,
Pinty Jeanpierre,
Hagen Martin
Publication year - 2003
Publication title -
quarterly journal of the royal meteorological society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.744
H-Index - 143
eISSN - 1477-870X
pISSN - 0035-9009
DOI - 10.1256/qj.02.50
Subject(s) - graupel , mesoscale meteorology , meteorology , precipitation , weather research and forecasting model , radar , environmental science , climatology , numerical weather prediction , grid , geology , geography , geodesy , computer science , telecommunications
During Intensive Observing Period (IOP) 2a of the Mesoscale Alpine Programme (MAP) a significant convective system developed in the Lago Maggiore area. Its evolution is simulated using the Meso‐NH model run over three nested domains with a 2 km horizontal resolution for the finest grid. Model results are assessed by comparing computed precipitation and model radar reflectivities with observed parameters. A control simulation initialized with European Centre for Medium‐Range Weather Forecasts analyses and run with the standard microphysical scheme of the model yields fairly realistic results. Neglecting the ice processes in the microphysical scheme degrades the numerical results, whereas, significant improvement is obtained when heavy rimed particles are considered to be hail instead of graupel. Copyright © 2003 Royal Meteorological Society.