RT info:eu-repo/semantics/article
T1 Cost-benefit analysis of the nesting approach in HARMONIE-AROME for a supercell outbreak case study
A1 Díaz Fernández, Javier
A1 Calvo Sancho, Carlos
A1 López Reyes, Mauricio
A1 Bolgiani, Pedro
A1 González Alemán, Juan Jesús
A1 Morata, Ana
A1 Santos Muñoz, Daniel
A1 Martín Pérez, María Luisa
K1 Convection
K1 HARMONIE-AROME
K1 Nesting approach
K1 Supercells
K1 Verification
K1 12 Matemáticas
AB Supercells are among the most hazardous convective systems, frequently producing large hail, destructive winds,and severe socio-economic impacts. The enhancement of weather simulations is identified as a primary strategyto optimise short-term forecasting. The present study investigates the performance of two high-resolution con-figurations of the HARMONIE-AROME model during a severe supercell outbreak over eastern Iberia on 31st July2015, when six confirmed supercells caused significant damage. The setups tested include a two-step one-waynested approach (2.5 km outer domain and 500 m inner domain), and a single-domain configuration at 500 mresolution. The model outputs, which include reflectivity, precipitation and temperature, are validated againstOPERA radar composites and surface observations. At the same time, key convective parameters, derived fromthe Murcia sounding, are analyzed to assess the pre-convective environment. Although the simulationsdemonstrate a similar structure to the observed event, the two-domain nested simulation offers a slightly su-perior depiction of reflectivity and thermodynamic profiles. Nevertheless, precipitation analysis reveals thatwhile nesting improves moderate rainfall representation, it introduces larger errors for the most extremeamounts, limiting its overall benefit. The obtained gain is not sufficient to offset the 30% higher computationalcost when the two-domain nested approach is used. The single-domain non-nested configuration demonstrates asuperior level of efficiency, exhibiting equivalent accuracy while exhibiting a diminished resource requirement.
PB Elsevier
SN 0169-8095
YR 2026
FD 2026
LK https://uvadoc.uva.es/handle/10324/82593
UL https://uvadoc.uva.es/handle/10324/82593
LA eng
NO Atmospheric Research, 2026, vol. 334, p. 108774
DS UVaDOC
RD 05-feb-2026