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• W4220825008 abstract "&lt;p&gt;It&amp;#8217;s now recognized that a global climate change is taking place, leading to an increase in temperatures and a variation in precipitation regime, also affecting groundwater (GW) (Taylor et al., 2013).&lt;/p&gt;&lt;p&gt;In this study we want to evaluate how climate variability affects GW temperature (GWT) in the Piedmont Po plain (NW Italy).&lt;/p&gt;&lt;p&gt;The Piedmont Po plain covers the 27% of the whole region and it&amp;#8217;s the most important GW reservoir of Piedmont. It consists, from top to bottom, by Alluvial deposit complex (lower Pleistocene-Holocene), that hosts a shallow unconfined aquifer, the &amp;#8220;Villafranchiano&amp;#8221; transitional complex (late Pliocene-early Pleistocene), that hosts a multilayered aquifer, and a Marine complex (Pliocene) hosting a confined aquifer.&lt;/p&gt;&lt;p&gt;For this research, 41 wells in the shallow aquifer and 20 weather stations were selected throughout the Piedmont Po plain area, and GW and air temperature parameters were analysed for the period 2010-2019.&lt;/p&gt;&lt;p&gt;Both GW and air temperature data (respectively, GWT and AT) were firstly studied with basic statistical analysis (mean, maxima, minima) and then with the Mann-Kendall and Theil-Sen methods to evaluate the trend. &lt;br&gt;The AT monthly mean data have a mean increase of 1,69 &amp;#176;C/10years; the monthly mean GWT also show a general increase in all the plain, with a mean of 0.85 &amp;#176;C/10years.&lt;/p&gt;&lt;p&gt;Then to compare water and air temperature, the Voronoi polygons method was used on QGis by centring the polygons on the weather stations. From this comparison, it was possible to highlight that in most cases (37 on 41, thus 90% of the analysed couples of temperature data) there is a greater increase in the monthly mean AT than in the monthly mean GWT.&lt;/p&gt;&lt;p&gt;The same behaviour was observed for the monthly minima and maxima GW and AT.&lt;/p&gt;&lt;p&gt;These results testify a greater resilience of GWT to climate variability. Future insights will be a detailed analysis of the factors influencing the more or less evident increase in GWT in relation to AT (e.g. depth of the water table, position of the monitoring well, position of the probe inside the well).&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;&lt;p&gt;&lt;strong&gt;References&lt;/strong&gt;&lt;/p&gt;&lt;p&gt;Taylor R.G., Scanlon B., D&amp;#246;ll P., Rodell M., van Beek R., Wada Y., Longuevergne L.,&lt;/p&gt;&lt;p&gt;Leblanc M., Famiglietti J.S., Edmunds M., Konikow L., Green T.R., Chen J.,&lt;/p&gt;&lt;p&gt;Taniguchi M., Bierkens M.F.P., MacDonald A., Fan Y., Maxwell R.M., Yechieli&lt;/p&gt;&lt;p&gt;Y., Gurdak J.J., Allen D., Shamsudduha M., Hiscock K., Yeh P.J.F., Holman I.,&lt;/p&gt;&lt;p&gt;Treidel H. 2013. Ground water and climate change. Nat. Clim. Change 3, 322-329.&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;" @default.
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• W4220825008 date "2022-03-28" @default.
• W4220825008 modified "2023-10-17" @default.
• W4220825008 title "The impact of climate change on groundwater temperature of the Piedmont Po plain (NW Italy)" @default.
• W4220825008 doi "https://doi.org/10.5194/egusphere-egu22-7242" @default.
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