The application of a new approach to bias-correct Earth System Model (ESM) driving data for regional Climate Model (RCM) downscaling is presented. The approach employs a novel Empirical Runtime Bias Correction (ERBC) of the ESM, designed to self-consistently reduce climatological biases in the driving data. The impact of such ESM bias reduction on RCM downscaling is evaluated through an experimental protocol where a single ESM...

An empirical runtime bias correction (ERBC) technique is applied to a global model used to drive two RCMs: CRCM5 (Ouranos) and CanRCM5 (CCCma). While the ERBC is constructed to improve the climatological annual cycle, due to its application at runtime, it also indirectly improves time-dependent circulation dynamics and maintains physical coherence among adjusted atmospheric variables. We analyze the regional impacts of this pr...

This paper presents results from high-resolution climate change simulations that permit convection and resolve mesoscale orography at 3-km grid spacing over Fenno-Scandinavia using the HARMONIE-Climate (HCLIM) model. Two global climate models (GCMs) have been dynamically down-scaled for the RCP4.5 and RCP8.5 emission scenarios and for both near and far future periods in the 21st century. The warmer and moister climate conditio...

European climate is associated with variability and changes in the mid-latitude atmospheric circulation. In this study, we aim to investigate potential future change in circulation over Europe by using the EURO-CORDEX regional climate projections at 0.11° grid mesh. In particular, we analyze future change in 500-hPa geopotential height (Gph), 500-hPa wind speed and mean sea level pressure (MSLP) addressing different warming le...

Using a sub-selection of regional climate models at 0.11° ( $$\approx$$ ≈ 12 km) grid resolution from the EURO-CORDEX ensemble, we investigate how the spatial extent of areas associated with the most intensive daily precipitation events changes as a consequence of global warming. We address this by analysing three different warming levels: 1 °C, 2 °C and 3 °C. We find that not only does the intensity of such events increase, b...

Convection-permitting climate models have shown superior performance in simulating important aspects of the precipitation climate including extremes and also to give partly different climate change signals compared to coarser-scale models. Here, we present the first long-term (1998–2018) simulation with a regional convection-permitting climate model for Fenno-Scandinavia. We use the HARMONIE-Climate (HCLIM) model on two nested...