Convective environment in ALADIN Reanalysis

In the framework of the national project PERUN (Prediction, Evaluation and Research for Understanding National sensitivity and impacts of drought and climate change for Czechia) new ALADIN (Aire Limitée, Adaptation Dynamique, Development International) Reanalyses are now available for the evaluation purposes. The reanalyses use boundary conditions from European reanalysis ERA5, the first reanalysis uses an assimilation of various meteorological every six hours. The domain of the reanalyses covers Europe with 2.3 km of horizontal resolution. As the evaluation domain we use primarily the area of the Czech Republic.

The reanalysis contain, among other things, outputs describing the convective environment in a 25-year series (1990-2014). The aim of this work is evaluation of CAPE (Convective Available Potential Energy), CIN (Convective INhibition) and wind shear data, as the key values for convection formation. These data are assessed in the perspective of the common temporal and spatial characteristics. Within this study, reanalysis data were verified by sounding data at least from meteorological station Praha-Libuš. These results will be applied for comparison with the ALADIN climate model for period 2025 – 2100. This run use boundary conditions from the climate model CMIP6 with scenario SSP5-8.5 where emissions follow a worst-case pathway until 2040 from all other emission scenarios.