Marine CO2 system and inorganic nutrients in the water column along the Torungen- Hirtshals section in the Skagerrak in 2020
Marine CO2 system data (total alkalinity, and total dissolved inorganic carbon) and nutrients were collected from full water column on the IMR repeat Torungen-Hirtshals section in the Skagerrak. Sampling was performed in January on board RV GM Dannevig. The seawater samples were collected from a CTD...
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| Format: | Dataset |
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Institute of Marine Research
2021
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| Online Access: | https://dx.doi.org/10.21335/nmdc-1996337184 http://metadata.nmdc.no/metadata-api/landingpage/df906748aafb2e14ef93020b85949538 |
| Summary: | Marine CO2 system data (total alkalinity, and total dissolved inorganic carbon) and nutrients were collected from full water column on the IMR repeat Torungen-Hirtshals section in the Skagerrak. Sampling was performed in January on board RV GM Dannevig. The seawater samples were collected from a CTD-Rosette (12-Niskin bottle) following standard procedures and analyzed at Institute of Marine Research, Tromsø, Norway after the cruises following the method described in Dickson et al. (2007). DIC was determined using gas extraction of acidified samples followed by coulometric titration and photometric detection using a Versatile Instrument for the Determination of Titration carbonate (VINDTA 3D, Marianda, Germany). determined by potentiometric titration with 0.1 N hydrochloric acid using a Versatile Instrument for the Determination of Titration Alkalinity (VINDTA 3S, Marianda, Germany). Routine analyses of Certified Reference Materials (CRM, provided by A. G. Dickson, Scripps Institution of Oceanography, United States) ensured the accuracy of the measurements, which was better than ±2 and ±2 µmol kg-1 for DIC and AT, respectively. Description of the analytical methods can be found as a summary in the data file, as well as in the annual reports by Chierici et al., 2012 to 2017, Jones et al., 2018 to 2020, Skjelvan et al., 2021. Water samples for analysis of nutrients [NO2, NO-, Si(OH)4, PO4] were preserved with 250 µL chloroform until post-cruise analysis following standard methods (Grasshoff et al., 2009) at the chemical laboratory at IMR, Bergen. Three replicates were analyzed for each sample. This study is a contribution to the project Monitoring ocean acidification in Norwegian waters/Havforsuringsovervåking i norske farvann” funded by the Norwegian Environment Agency (Miljødirektoratet) project# 17078007. Data is also published in Vannmiljø as well as contributes to SDG 14.3.1 Indicator: Average marine acidity (pH) |
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