Naslov
The performance of the RegCM4 ensemble in simulating historical climate

Autori
Ivan Güttler, Tomislav Stilinović, Lidija Srnec, Čedomir Branković

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Skup
Challenges in Meteorology 4 / Meteorološki izazovi 4

Mjesto i datum
Zagreb, Hrvatska, 24.11.2015. - 25.11.2015

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Domaća recenzija

Ključne riječi
regional climate model; systematic errors; discretization
(ional climate model; systematic errors; discretization)

Sažetak
An ensemble of regional climate model (RegCM4) simulations applied over the EURO-CORDEX domain is used to estimate model performance for historical climate. Earlier experiments at the 12.5 km and 50 km, when RegCM4 was forced by ERA-Interim, showed strong sensitivity of simulated near-surface temperature, total cloud cover and total precipitation to horizontal resolution. In this study, we assess an enlarged set of experiments when RegCM4 was forced by global climate models (GCMs) HadGEM2-ES, EC-EARTH, MPI-ESM-LR and CNRM- CM5 for the period 1970–2005 at the 50-km resolution and for the period 1970–1974 at the 12.5-km resolution. Model performance is evaluated against the E-OBS gridded temperature, precipitation and the mean sea-level pressure data and also compared with the results from forcing GCMs. In order to estimate potential impact of reduced time step on the RegCM 12.5-km simulations, an additional set of 50-km simulations is performed with the same time step as in the 12.5-km simulations. We explore how the RegCM4 time stepping relates to overestimation of the total cloud cover when large time step is used in model integrations.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

POVEZANOST RADA