Woodward, E Malcolm S; Harris, Carolyn; Al-Moosawi, Lisa (2011): Nutrient concentrations in surface water from time series station L4 in the western English Channel in 2002. PANGAEA, https://doi.org/10.1594/PANGAEA.771811, In: Woodward, EMS et al. (2011): Nutrient concentration profiles from time series stations E1 and L4 in the western English Channel from 2000 to 2010. Plymouth Marine Laboratory, PANGAEA, https://doi.org/10.1594/PANGAEA.771850
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Latitude: 50.250000 * Longitude: -4.216670
Date/Time Start: 2002-01-07T00:00:00 * Date/Time End: 2002-12-15T00:00:00
Minimum DEPTH, water: 0 m * Maximum DEPTH, water: 0 m
WCO_L4 * Latitude: 50.250000 * Longitude: -4.216670 * Date/Time Start: 1988-01-01T00:00:00 * Date/Time End: 2009-12-31T00:00:00 * Elevation: -55.0 m * Location: English Channel * Campaign: Western Channel Observatory * Basis: Coastal station * Device: Monitoring (MON) * Comment: Weekly sampling has been carried out since 1988. L4 is located 10 nm south-west of Plymouth.
Nutrient samples for nitrate, nitrite, silicate and phosphate are taken weekly, when possible, at station L4 of the Plymouth Marine Laboratory Western Channel Observatory long-term hydrographic time series. They are sampled under clean conditions and returned in the cool and dark, and as soon as possible, to the laboratory in Plymouth where triplicate samples are analysed both for filtered (0.2 µm Millipore Fluoropore) and non-filtered water. Samples are not stored or frozen unless there are extenuating circumstances making the live analysis impossible. The analyser is a 5-channel Bran and Luebbe segmented flow system using well tested methodologies, and the same as those used by the PML nutrient group in all their International Research cruises, and research programmes. Quality control procedures are carried out using certified reference materials, and also the group participates in the Quasimeme programme. This has been the protocol since 2007, and prior to that the samples were stored frozen and then analysed in batches.
|#||Name||Short Name||Unit||Principal Investigator||Method||Comment|
|2||DEPTH, water||Depth water||m||Geocode|
|3||Nitrite||[NO2]-||µmol/l||Woodward, E Malcolm S|
|4||Nitrate and Nitrite||[NO3]- + [NO2]-||µmol/l||Woodward, E Malcolm S|
|5||Silicate||Si(OH)4||µmol/l||Woodward, E Malcolm S|
|6||Phosphate||[PO4]3-||µmol/l||Woodward, E Malcolm S|
126 data points