气候变化领域集成服务门户(CCPortal): Recent trends of groundwater temperatures in Austria

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DOI	10.5194/hess-22-3143-2018
	Recent trends of groundwater temperatures in Austria
	Benz S.A.; Bayer P.; Winkler G.; Blum P.
发表日期	2018
ISSN	1027-5606
起始页码	3143
结束页码	3154
卷号	22 期号:6
英文摘要	Climate change is one of if not the most pressing challenge modern society faces. Increasing temperatures are observed all over the planet and the impact of climate change on the hydrogeological cycle has long been shown. However, so far we have insufficient knowledge on the influence of atmospheric warming on shallow groundwater temperatures. While some studies analyse the implication climate change has for selected wells, large-scale studies are so far lacking. Here we focus on the combined impact of climate change in the atmosphere and local hydrogeological conditions on groundwater temperatures in 227 wells in Austria, which have in part been observed since 1964. A linear analysis finds a temperature change of +0.7 ± 0.8 K in the years from 1994 to 2013. In the same timeframe surface air temperatures in Austria increased by 0.5 ± 0.3 K, displaying a much smaller variety. However, most of the extreme changes in groundwater temperatures can be linked to local hydrogeological conditions. Correlation between groundwater temperatures and nearby surface air temperatures was additionally analysed. They vary greatly, with correlation coefficients of -0.3 in central Linz to 0.8 outside of Graz. In contrast, the correlation of nationwide groundwater temperatures and surface air temperatures is high, with a correlation coefficient of 0.83. All of these findings indicate that while atmospheric climate change can be observed in nationwide groundwater temperatures, individual wells are often primarily dominated by local hydrogeological conditions. In addition to the linear temperature trend, a step-wise model was also applied that identifies climate regime shifts, which were observed globally in the late 70s, 80s, and 90s. Hinting again at the influence of local conditions, at most 22 % of all wells show these climate regime shifts. However, we were able to identify an additional shift in 2007, which was observed by 37 % of all wells. Overall, the step-wise representation provides a slightly more accurate picture of observed temperatures than the linear trend. © Author(s) 2018.
语种	英语
scopus关键词	Climate change; Climate models; Groundwater; Hydrogeology; Climate regime shift; Correlation coefficient; Groundwater temperatures; Hydrogeological conditions; Hydrogeological cycle; Increasing temperatures; Large-scale studies; Surface air temperatures; Atmospheric temperature; climate change; correlation; hydrogeology; temperature inversion; trend analysis; warming; water temperature; well water; Austria; Graz; Linz; Styria; Upper Austria
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160009
作者单位	Benz, S.A., Institute of Applied Geosciences (AGW), Karlsruhe Institute of Technology (KIT), Karlsruhe, 76131, Germany; Bayer, P., Institute of New Energy Systems (InES), Ingolstadt University of Applied Sciences, Ingolstadt, 85019, Germany; Winkler, G., Institute of Earth Sciences (IEW), NAWI Graz Geocenter, University of Graz, Graz, 8010, Austria; Blum, P., Institute of Applied Geosciences (AGW), Karlsruhe Institute of Technology (KIT), Karlsruhe, 76131, Germany
推荐引用方式 GB/T 7714	Benz S.A.,Bayer P.,Winkler G.,et al. Recent trends of groundwater temperatures in Austria[J],2018,22(6).
APA	Benz S.A.,Bayer P.,Winkler G.,&Blum P..(2018).Recent trends of groundwater temperatures in Austria.Hydrology and Earth System Sciences,22(6).
MLA	Benz S.A.,et al."Recent trends of groundwater temperatures in Austria".Hydrology and Earth System Sciences 22.6(2018).