Naslov
Application of verification method SAL on a regional climate model simulations of heavy precipitation events

Autori
Ivušić, Sarah ; Güttler, Ivan ; Horvath, Kristian ;

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

Skup
Znanstveno-stručni skup s međunarodnim sudjelovanjem: Meteorološki izazovi 6: Napredne tehnologije u rješavanju meteoroloških izazova

Mjesto i datum
Zagreb, Hrvatska, 15.11.2018. - 16.11.2018

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Domaća recenzija

Ključne riječi
regional climate model, ALADIN-Climate, heavy precipitation event, MESCAN, SAL, quantitative precipitation forecast

Sažetak
During the first HyMeX Special Observation Period (SOP1) in autumn of 2012 the coastal mountainous region in Croatia was affected by heavy precipitation events (HPEs) which caused considerable damage. We are analysing the ability of regional climate model ALADIN-Climate (ALD) to reproduce the HPEs. The method used for the verification of quantitative precipitation is object-based three-dimensional quality measure SAL (S – the structure, A – the amplitude, L – the location). Reference data used for verification is precipitation analysis system MESCAN, available on 5.5 km resolution every 6 h. Additionally, SAL was computed for two ALD versions, version 5.2 (ALD5) and the newest 6.3 version (ALD6), both driven by ERA-Interim reanalysis over the Med-CORDEX domain on 0.11 (~12.5 km) grid resolution. Also, the spectral nudging technique (SN) is applied on both ALD versions (ALD5SN and ALD6SN). ALD6SN limits the rain overestimation and improves the A component, but the objects are still too large and/or too flat than in ALD5SN. SN improves model behaviour, comparing the ALD5 and ALD5SN, by giving less spread SAL values for all three components. The results indicate that use of SN technique limits the timing errors and as such may be required for evaluation of cases. Overall, the study shows that it is relevant to evaluate RCMs on cases, despite the usual usage in climate mode.

Izvorni jezik
Engleski

Znanstvena područja
Geofizika

POVEZANOST RADA