气候变化领域集成服务门户(CCPortal): Impact of groundwater representation on heat events in regional climate simulations over Europe

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DOI	10.5194/esd-15-167-2024
	Impact of groundwater representation on heat events in regional climate simulations over Europe
	Poshyvailo-Strube, Liubov; Wagner, Niklas; Goergen, Klaus; Furusho-Percot, Carina; Hartick, Carl; Kollet, Stefan
发表日期	2024
ISSN	2190-4979
EISSN	2190-4987
起始页码	15
结束页码	2
卷号	15 期号:2
英文摘要	The representation of groundwater is simplified in most regional climate models (RCMs), potentially leading to biases in the simulations. This study introduces a unique dataset from the regional Terrestrial Systems Modelling Platform (TSMP) driven by the Max Planck Institute Earth System Model at Low Resolution (MPI-ESM-LR) boundary conditions in the context of dynamical downscaling of global climate models (GCMs) for climate change studies. TSMP explicitly simulates full 3D soil and groundwater dynamics together with overland flow, including complete water and energy cycles from the bedrock to the top of the atmosphere. By comparing the statistics of heat events, i.e., a series of consecutive days with a near-surface temperature exceeding the 90th percentile of the reference period, from TSMP and those from GCM-RCM simulations with simplified groundwater dynamics from the COordinated Regional Climate Downscaling EXperiment (CORDEX) for the European domain, we aim to improve the understanding of how groundwater representation affects heat events in Europe.The analysis was carried out using RCM outputs for the summer seasons of 1976-2005 relative to the reference period of 1961-1990. While our results show that TSMP simulates heat events consistently with the CORDEX ensemble, there are some systematic differences that we attribute to the more realistic representation of groundwater in TSMP. Compared to the CORDEX ensemble, TSMP simulates fewer hot days (i.e., days with a near-surface temperature exceeding the 90th percentile of the reference period) and lower interannual variability and decadal change in the number of hot days on average over Europe. TSMP systematically simulates fewer heat waves (i.e., heat events lasting 6 d or more) compared to the CORDEX ensemble; moreover, they are shorter and less intense. The Iberian Peninsula is particularly sensitive with respect to groundwater. Therefore, incorporating an explicit 3D groundwater representation in RCMs may be a key in reducing biases in simulated duration, intensity, and frequency of heat waves in Europe. The results highlight the importance of hydrological processes for the long-term regional climate simulations and provide indications of possible potential implications for climate change projections.
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001190498400001
来源期刊	EARTH SYSTEM DYNAMICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/290776
作者单位	Helmholtz Association; Research Center Julich; INRAE; Helmholtz Association; Research Center Julich
推荐引用方式 GB/T 7714	Poshyvailo-Strube, Liubov,Wagner, Niklas,Goergen, Klaus,et al. Impact of groundwater representation on heat events in regional climate simulations over Europe[J],2024,15(2).
APA	Poshyvailo-Strube, Liubov,Wagner, Niklas,Goergen, Klaus,Furusho-Percot, Carina,Hartick, Carl,&Kollet, Stefan.(2024).Impact of groundwater representation on heat events in regional climate simulations over Europe.EARTH SYSTEM DYNAMICS,15(2).
MLA	Poshyvailo-Strube, Liubov,et al."Impact of groundwater representation on heat events in regional climate simulations over Europe".EARTH SYSTEM DYNAMICS 15.2(2024).