Nutrient concentrations in water samples collected at Station MARCH-1997-GN36199704603MNB01 in the Aegean Sea

DOI

For oxygen determination samples were analysed on board immediately after collection with the Winkler method according to Carpenter (1965a, 1965b). Titration was done with a Metrohm Dosimat 665 automatic burette. Precision of the method is estimated at 0.05 ml O2/l.Apparent oxygen utilisation (AOU) was calculated according to difference of measured oxygen values and oxygen saturation given by the equations of Benson and Krause (1984), which are recommended by Millero (1986).Percentage of oxygen saturation in water was calculated from the following equation (at temperature 0-40ºC and salinity 0-40 promille): %O2 = (O2/O2') X100, where O2 is oxygen concentration in a sample, O2' is oxygen solubility in sea water at the same temperature and salinity as in the sample.Samples for determination of nutrients were collected in 100 ml polyethylene bottles and kept continuously under deep freeze (-20°C ) until analysis in the laboratory. Nitrate and nitrite were analysed by a Bran and Luebbe Autoanalyser II according to the procedure of Treguer and Le Corre (1975). Phosphate was measured by a Perkin Elmer Lambda 2S UV/VIS Spectrometer according to the method described by Murphy and Riley (1962). Precision is estimated at ±0.1 µmol/l for nitrate and ±0.02 µmol/l for phosphate and nitrite. Detection limit was 0.08 µmol/l for nitrate and nitrite and 0.01 µmol/l for phosphate.

Identifier
DOI https://doi.org/10.1594/PANGAEA.684629
Related Identifier https://doi.org/10.12681/mms.292
Related Identifier https://doi.org/10.12681/mms.258
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.684629
Provenance
Creator Souvermezoglou, Ekaterini; Krasakopoulou, Evangelia ORCID logo; Pavlidou, Alexandra ORCID logo
Publisher PANGAEA
Contributor Hellenic Center of Marine Research, Institut of Oceanography, Greece
Publication Year 2008
Funding Reference Fourth Framework Programme https://doi.org/10.13039/100011105 Crossref Funder ID IC21960002 https://cordis.europa.eu/project/id/IC21960002 Mass Transfer and Ecosystem Response; Fourth Framework Programme https://doi.org/10.13039/100011105 Crossref Funder ID MAS3960051 https://cordis.europa.eu/project/id/MAS3960051 Mass Transfer and Ecosystem Response
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Resource Type Dataset
Format text/tab-separated-values
Size 133 data points
Discipline Earth System Research
Spatial Coverage (25.200 LON, 40.248 LAT)