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dcterms:title "Surface temperature, surface oxygen, water clarity, water chemistry and phytoplankton chlorophyll a data from Blelham Tarn, UK, 2021-2022" ;
dcterms:identifier <https://catalogue.ceh.ac.uk/id/3890dcf8-da31-430c-942e-4baa5219a7b7> ;
adms:identifier <https://doi.org/10.5285/3890dcf8-da31-430c-942e-4baa5219a7b7> ;
dcterms:bibliographicCitation "Feuchtmayr, H., Clarke, M.A., Dodd, B.A., Guyatt, H., Hunt, A.G., James, J.B., Kelsall, M., Mackay, E.B., McShane, G., Rankin, G., Rhodes, G., Thackeray, S.J., Maberly, S.C. (2025). Surface temperature, surface oxygen, water clarity, water chemistry and phytoplankton chlorophyll a data from Blelham Tarn, UK, 2021-2022. NERC EDS Environmental Information Data Centre. https://doi.org/10.5285/3890dcf8-da31-430c-942e-4baa5219a7b7" ;
dcterms:description "This is part of an ongoing long-term monitoring dataset of surface temperature, surface oxygen, water clarity, water chemistry and phytoplankton chlorophyll a from fortnightly sampling at Blelham Tarn in Cumbria, England that began in 1945 for some variables. The data have been collected by the UK Centre for Ecology & Hydrology (UKCEH). The data available to download comprise surface temperature (TEMP) in degree Celsius, surface oxygen saturation (OXYG) in % air-saturation, Secchi depth (SECC) in metres, alkalinity (ALKA) in µg per litre as CaCO3 and pH. Ammonium (NH4N), nitrate (NO3N), soluble reactive phosphate (PO4P), total phosphorus (TOTP), dissolved reactive silicon expressed as SiO2 (SIO2) and phytoplankton chlorophyll a (TOCA) are all given in µg per litre. Water samples are based on a sample integrated from 0 to 5 m. All data are from January 2021 until the end of 2022." ;
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rdfs:label "Please note that the data presented here are raw data that have not yet been quality-controlled and calibrated. However, the data has been double-entered and checked visually. Missing data are due to weather conditions, COVID-19 restrictions, or staff shortages. Measurements are made from a boat at a marked location (buoy) at the deepest part of the lake. When it was not possible to visit the buoy, samples were taken from the shore, thus water samples were not integrated on these occasions, marked as Flag 2."
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