The climate of the region around Norville is of the oceanic type and falls within the climatic zone known as the “Eastern English Channel Coast”, characterized by low sunshine (1,550 hours per year), high air humidity (more than 20 hours per day with relative humidity above 80% in winter), and frequent strong winds. More specifically, the Normandy IPCC (https://www.normandie.fr/giec-normanddistinguishes three main types of climate for the Normandy region, further refined at a finer scale by local geographical factors. The Norville site is therefore exposed to a “contrasted hill climate”, which is less directly influenced by oceanic airflows but nonetheless experiences fairly significant precipitation due to the hilly relief that favors its formation.
Over the period 1971–2020, the average annual temperature was 11.6°C. Average annual precipitation amounted to 844 mm, with an annual average of 46 frost days.
Monitoring
The Norville site is part of the Karst SNO network (https://sokarst.org/sites/karst-de-la-craie/The Karst SNO systems correspond to binary karst systems developed in chalk formations beneath a cover of superficial deposits, with varying degrees of karstification that differ spatially across the Paris Basin.
The Norville site consists of a spring and the Norville borehole; the spring is fed by a main karst conduit into which a small perennial stream sinks. Its catchment area is small and is mainly used for livestock farming. Transfer from the surface is very rapid (less than 24 hours).
High-resolution monitoring is carried out using multi-parameter probes, recording sensors and automatic samplers. This site has some of the longest hydrochemical records of the above networks.
Présentation de la station du Baget
The data collected at the Norville site are monthly and began in January 2021.
The analyses are carried out at the GEOPS laboratory (Orsay).
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