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Details of 1986-2018 near-surface sea temperature registered daily at the pumping station of the Nuclear Power Station of Flamanville (25 km south west of Cherbourg, Northwest Cotentin, sea Channel)


Dataset identification

Title of dataset1986-2018 near-surface sea temperature registered daily at the pumping station of the Nuclear Power Station of Flamanville (25 km south west of Cherbourg, Northwest Cotentin, sea Channel)
Narrative summary of datasetDuring 33 years, from January 1986 to December 2018, seawater temperature has then been registered daily at 4pm in the pumping station([1])-[#_ftn1] of the Nuclear Power Station of Flamanville located 25 km south west of Cherbourg. In order to cool their condensers, seawater has been drawn off with a water flows of 45 m3s-1. The monthly average seawater temperature minimum has been registered in February (8,90°C), with extremes values in 1986 (6,80°C) and 2016 (10,33°C). The maximum of the seawater temperature has been registered in august (17, 81°C), varying from 16,28°C in 1986 to 18,60°C in 2014. The annual average seawater temperature is 13,09°C when using monthly average values and 13,13°C using all 12053 individuals values. Mean annual values differ from 11,37 °C in 1986 to 14,18 °C in 2014. Before this time-series of 33 years, the only dataset available had been registered between 1904 and 1923 and had been published in 35 by J. R. Lumby([5])-[#_ftn5] at 12 meter depth to get an additional time-series of 999 seawater temperatures recorded from September 1976 to May 1980, in a discontinuous way. An increase of 1,2 °C in the annual mean seawater temperature is observed between the first and the third time-series. A key point when analysing those three time-series is to keep in mind the difference in the location, depth and in the sensor. Conclusions from comparisons of those three time series need to be done carefully. Those data are now updated each year before being published in an annual report for Ifremer and EDF([6])-[#_ftn6] about the ecological and fishery monitoring of Flamanville Nuclear Power Station location.   ([1])-[#_ftnref1] Geographical coordinates of the pumping station : 49,53 N – 1,88 W ([2])-[#_ftnref2] LUMBY, J.R. 1935.- « Salinity and temperature of the English Channel ». Fishery Investigations, series II, vol. XIV, n°3 ([3])-[#_ftnref3] Coordonnées géographiques du R 26 : 49° 37’ N – 02° 14’ W ([4])-[#_ftnref4] Today Laboratoire National d'Hydraulique et Environnement (LNHE) ([5])-[#_ftnref5] Geographical coordinates  of Fertex and Aanderaa : 49° 32’ 29’’N -  001° 53’ 49’’W ([6])-[#_ftnref6] ROPERT M., E. ANTAJAN, G. COURTAY, L. DREVES, A. FOVEAU, T. HERNÀNDEZ FARIÑAS, C. LOOTS, I. SCHLAICH , B. SIMON. (2019). Surveillance écologique et halieutique du site électronucléaire de Flamanville : Année 2018. RST/ODE/UL/LERN-19.001. Conv. EDF C4493C0850. 217 p. Important Note: This submission has been initially submitted to SEA scieNtific Open data Edition (SEANOE) publication service and received the recorded DOI. The metadata elements have been further processed (refined) in EMODnet Ingestion Service in order to conform with the Data Submission Service specifications.
Summary of processing methodologyLes mesures techniques sont réalisées par EDF au sein du bâtiment de pompage (donc sous abri). Les pompes sont toujours immergées, même à basse mer de vives eaux. La mesure automatique de la température de l'eau de mer se fait toujours au même point fixe, à 2 ou 3 mètres au-dessus.
Start date1986-01-01
End date2018-12-31
Frequency of observationsday to sub-week

Responsible organisations

Organisation nameIFREMER, SISMER, Scientific Information Systems for the SEA
Role of organisationDataset Holding Organisation
Organisation nameSEANOE (SEA scieNtific Open data Edition) (SEANOE)
Role of organisationPublisher

Dataset availability

Original dataset download link
Date of original dataset publication2020-12-13
Dataset formatDocuments
Public accessNo limitations
License for useCC-BY 4.0


Latitude north boundary49.53
Longitude east boundary-1.88
Latitude south boundary49.53
Longitude west boundary-1.88
Sea areaNorth Atlantic Ocean
North Sea
English Channel
Atlantic Ocean
European mainland
Northeast Atlantic Ocean (40W)
Vertical extent maximum5 Metres

Data types, collection and processing

Observation typeWater column temperature and salinity
ParameterTemperature of the water column
Platform typeland/onshore structure
Platform nameNuclear Power Station of Flamanville
Data quality processing informationQuality controlled data

Process information

Submitting organisationIFREMER, CENTRE MANCHE, MER DU NORD
Submission identifier (UUID)a53ad03f-3731-7313-3133-000000071341
Date of dataset creation2020-01-01
Date of dataset revision2020-06-05
Date of metadata creation2020-6-10
Date of metadata latest revision2020-11-27
Date of publishing2020-12-14
Processing data centreIFREMER, SISMER, Scientific Information Systems for the SEA
Summary record-ID716