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| Hauptseite > Publikationsdatenbank > Groundwater in Terrestrial Systems Modelling over Europe: New Heat Events Climatology for Historical Time Span and Projections |
| Hauptseite > Publikationsdatenbank > Groundwater in Terrestrial Systems Modelling over Europe: New Heat Events Climatology for Historical Time Span and Projections |
| Report | FZJ-2024-01345 |
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2022
Report No.: Final report 2022
Abstract: The number of extreme hydroclimatic events (e.g., droughts, heat waves, heavy precipitation) increased during the recent years, and will likely occur even more often in the future (e.g., Hari et al. 2020; Molina et al. 2020; IPCC, 2021), resulting in multiple socio-economic impacts. In order to develop useful adaptation strategies consistent, high-resolution climate data are needed. The groundwater (GW) representation in most regional climate models (RCMs) is generally oversimplified or absent, as well as its interaction with soil moisture and atmosphere, leading to biases in simulation of extreme heat events. In fact, many RCMs overestimate the heat waves frequency, duration and intensity (e.g., Vautard et al. 2013; Lhotka et al. 2018).In this project, we explicitly simulate full 3D soil and GW dynamics, closing the terrestrial water cycle from GW across the land surface into the atmosphere, by utilizing the Terrestrial Systems Modelling Platform (TSMP) over the EURO-CORDEX domain. We obtained all terrestrial essential climate variables and indices for historical time span and the climate change projections with the Representative Concentration Pathways (RCP) 2.6 and RCP 8.5 (a rise in global temperature by 1.5°C and 4°C by 2100 respectively). Our analysis focused on the assessment of the effects of GW on the evolution of heat waves by investigating its frequency, duration and intensity.
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