Performance evaluation of RegCM4 in simulating extreme rainfall and temperature indices over the CORDEX‐Southeast Asia region

• DOI: 10.1002/joc.4803
• Publication Date: 2016-06-29T05:35:55Z
• Authors: Thanh Ngo‐Duc; Fredolin T. Tangang; Jerasorn Santisir...; Faye Cruz; Long Trinh‐Tuan; Thanh Nguyen‐Xuan; Tan Phan‐Van; Liew Juneng; Gemma Narisma; Patama Singhruck; Dodo Gunawan; Edvin Aldrian
• Keywords: 13. Climate action; 01 natural sciences; 0105 earth and related environmental sciences

ABSTRACT In this study, simulations over Southeast Asia (15°S–40°N, 80°–145°E) at 36 km resolution were conducted for the period 1989–2007 using Regional Climate Model version 4.3 ( RegCM4.3 ) under framework of Downscaling/Coordinated Downscaling Experiment – (or SEACLID / CORDEX ‐ SEA project. Forced by European Centre Medium‐Range Weather Forecasts (ECMWF) Interim Reanalysis (ERA‐Interim), 18 experiments carried out different combinations cumulus parameterization and ocean flux schemes. Twelve extreme indices both rainfall temperature estimated from model output. A statistical omega index was used to measure degree similarity among in phase shape. The results showed relatively high similarities mainland compared those Maritime Continent seasonal inter‐annual variability. had a lower that temperature. Observed daily data 52 meteorological stations region validate simulated indices. generally underestimated across region. Systematic biases each also identified. score ranking system established compare relative performance selected objectively. It shown with Massachusetts Institute Technology MIT )‐Emanuel scheme performed better than other convective combination ‐Emanuel Biosphere–Atmosphere Transfer BATS1e produced best performance.