Dataset Overview | National Centers for Environmental Information (NCEI)

Discrete profile measurements of total alkalinity, pH on total scale, water temperature, salinity, dissolved oxygen concentration, nutrients and other chemical and hydrographic parameters obtained during the R/V Sarmiento de Gamboa RADPROF 2014 cruise (EXPOCODE 29AH20140804) in the North East Atlantic Ocean from 2014-08-04 to 2014-08-24 (NCEI Accession 0290484)

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This NCEI accession contains discrete profile measurements of total alkalinity, pH on total scale, water temperature, salinity, dissolved oxygen concentration, nutrients and other chemical and hydrographic parameters obtained during the R/V Sarmiento de Gamboa RADPROF 2014 cruise (EXPOCODE 29AH20140804) in the North East Atlantic Ocean from 2014-08-04 to 2014-08-24. The RADPROF project is an annual routine monitoring activity associated with the Finisterre deep section, RADPROF, which contributes to the IEO oceanography observation system, IEOOS since 2003. RADPROF contributes to time series of hydrography, circulation, inorganic biogeochemistry and biology in the slope region of the Galicia-Cantabrian region, passing through the protected area of the Bank of Galicia since 2014. The time series began in 2003 with the VACLAN National Plan project, continued by COVACLAN (2005) and later integrated as a structural program of the IEO under the pseudonym RADPROF. The basic activity is reinforced and expanded thanks to competitive projects of the National Plan such as MODUPLAN (2014), or Interreg EU iFADO (2020), complementary sampling activities using gliders (FinisGlider). Currently RADPROF is basic in Chapter 6 of the Marine Strategy Framework Directive, as it also would be for the Ocean Acidification and Prevailing Conditions chapter. From 2024 to 2026 it will contribute to the EuroGOSHIP project in support of the improvement of European hydrography. RADPROF is recognized as a GO-SHIP Associated line due to the high density and quality of its thermohaline, circulation and inorganic biogeochemistry data, especially CO2 variables.

Dataset Citation

Cite as: Álvarez, Marta; González-Pola, César (2024). Discrete profile measurements of total alkalinity, pH on total scale, water temperature, salinity, dissolved oxygen concentration, nutrients and other chemical and hydrographic parameters obtained during the R/V Sarmiento de Gamboa RADPROF 2014 cruise (EXPOCODE 29AH20140804) in the North East Atlantic Ocean from 2014-08-04 to 2014-08-24 (NCEI Accession 0290484). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/g5ve-8n15. Accessed [date].

Dataset Identifiers

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gov.noaa.nodc:0290484

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Distribution Formats	Originator data format
Ordering Instructions	Contact NCEI for other distribution options and instructions.
Distributor	NOAA National Centers for Environmental Information +1-301-713-3277 NCEI.Info@noaa.gov
Dataset Point of Contact	NOAA National Centers for Environmental Information ncei.info@noaa.gov

Time Period	2014-08-04 to 2014-08-24
Spatial Bounding Box Coordinates	West: -14.0543 East: -3.7812 South: 42.993 North: 45
Spatial Coverage Map

General Documentation

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Associated Resources

NOAA National Centers for Environmental Information (2022). Ocean Carbon and Acidification Data System (OCADS). NOAA National Centers for Environmental Information. https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system
- https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system
  OCADS website
Original Cruise Information and Data Table for RADPROF Cruises
- https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/RADPROF/RADPROF_Table.html
  related resource
Data Management Support for the International Global Ocean Carbon and Repeat Hydrography Program
- https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/RepeatSections/
  related resource

Publication Dates	publication: 2024-04-03
Data Presentation Form	Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status	Complete - production of the data has been completed Historical archive - data has been stored in an offline storage facility
Data Update Frequency	As needed
Supplemental Information	This dataset is associated with the following EXPOCODE(s): 29AH20140804, and cruise ID(s): RADPROF_2014. This data package (Submission ID: BHE6UAHTF) was acquired by NCEI from the Scientific Data Integration System (SDIS) at the NOAA Pacific Marine Environmental Laboratory (PMEL) in accordance with the archival submission agreement between NCEI and PMEL.
Purpose	annually hydrographic repeat line, associated GOSHIP line
Use Limitations	accessLevel: Public Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives. Please contact authors for collaboration.

Dataset Citation	Cite as: Álvarez, Marta; González-Pola, César (2024). Discrete profile measurements of total alkalinity, pH on total scale, water temperature, salinity, dissolved oxygen concentration, nutrients and other chemical and hydrographic parameters obtained during the R/V Sarmiento de Gamboa RADPROF 2014 cruise (EXPOCODE 29AH20140804) in the North East Atlantic Ocean from 2014-08-04 to 2014-08-24 (NCEI Accession 0290484). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/g5ve-8n15. Accessed [date].
Cited Authors	Álvarez, Marta González-Pola, César Spanish Institute of Oceanography
Principal Investigators	Marta Álvarez Spanish Institute of Oceanography (IEO) César González-Pola Spanish Institute of Oceanography (IEO)
Contributors	Spanish Institute of Oceanography (IEO)
Resource Providers	Marta Álvarez Spanish Institute of Oceanography (IEO) Spanish Institute of Oceanography (IEO)
Publishers	NOAA National Centers for Environmental Information
Acknowledgments	Funding Information: Agencia Estatal de Investigación (MODUPLAN RADPROF, CTM2011-24008) Funding Information: European Union (FEMP, FEMP)

Theme keywords	NODC DATA TYPES THESAURUS DISSOLVED OXYGEN nitrate + nitrite content (concentration) pH phosphate SALINITY silicate total alkalinity WATER TEMPERATURE NODC OBSERVATION TYPES THESAURUS chemical discrete sample physical profile WMO_CategoryCode oceanography Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ALKALINITY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRATE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRITE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > OXYGEN EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PH EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PHOSPHATE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > SILICATE EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY OCADS Study Type Discrete measurement Profile Provider Variable Abbreviations ALKALI NITRATE OXYGEN PHSPHT PHTS25P0 SILCAT
Data Center keywords	NODC COLLECTING INSTITUTION NAMES THESAURUS Spanish Institute of Oceanography NODC SUBMITTING INSTITUTION NAMES THESAURUS Spanish Institute of Oceanography Global Change Master Directory (GCMD) Data Center Keywords IEO > Instituto Espanol de Oceanografia
Platform keywords	NODC PLATFORM NAMES THESAURUS RV Sarmiento De Gamboa Global Change Master Directory (GCMD) Platform Keywords Ships ICES/SeaDataNet Ship Codes SARMIENTO DE GAMBOA (call sign: EAKF, ICES code: 29AH)
Instrument keywords	NODC INSTRUMENT TYPES THESAURUS CTD Niskin bottle nutrient autoanalyzer pH sensor temperature sensor thermosalinograph titrator Global Change Master Directory (GCMD) Instrument Keywords AUTOANALYZER > AUTOANALYZER CTD > Conductivity, Temperature, Depth NISKIN BOTTLES PH METERS > PH METERS TEMPERATURE SENSORS > TEMPERATURE SENSORS THERMOSALINOGRAPHS
Place keywords	NODC SEA AREA NAMES THESAURUS Bay of Biscay North Atlantic Ocean Global Change Master Directory (GCMD) Location Keywords OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN Provider Geographic Names North East Atlantic Ocean
Project keywords	NODC PROJECT NAMES THESAURUS The Global Ocean Ship-based Hydrographic Investigations Program (GO-SHIP) Cruise ID RADPROF_2014 EXPOCODE 29AH20140804 Ocean Acidification Search Keywords Ocean Carbon and Acidification Data System (OCADS) Project Reference Section ID RADPROF Research Projects RADPROF
Keywords	NCEI ACCESSION NUMBER 0290484

Use Constraints	Cite as: Álvarez, Marta; González-Pola, César (2024). Discrete profile measurements of total alkalinity, pH on total scale, water temperature, salinity, dissolved oxygen concentration, nutrients and other chemical and hydrographic parameters obtained during the R/V Sarmiento de Gamboa RADPROF 2014 cruise (EXPOCODE 29AH20140804) in the North East Atlantic Ocean from 2014-08-04 to 2014-08-24 (NCEI Accession 0290484). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/g5ve-8n15. Accessed [date].
Data License	This dataset is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) License. SPDX License: Creative Commons Attribution 4.0 International (CC-BY-4.0)
Access Constraints	Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Fees	In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.

Lineage information for: dataset
Processing Steps	2024-04-03T18:57:28Z - NCEI Accession 0290484 v1.1 was published.
Output Datasets	NCEI Accession 0290484 v1.1 NCEI Accession 0290484 v1.1 (download) published 2024-04-03T18:57:28Z

Lineage information for: dataset
Processing Steps	Parameter or Variable: Total alkalinity; Abbreviation: ALKALI; Unit: umol/kg; Observation type: Profile (discrete samples); In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Sampling instrument: Niskin bottle - transferred to Borosilicate bottle; Analyzing instrument: Potentiometric method; Type of titration: end point; Cell type (open or closed): open; Detailed sampling and analyzing information: Samples for total alkalinity determination were collected in 600mL borosilicate bottles and were analysed within one or three days after sampling, no poisoning was needed (Dickson et al., 2007) Samples were analysed following the double end point potentiometric technique by Pérez and Fraga (Mar. Chem., 1987) and Pérez et al. (CC.MM., 2000). Potentiometric titration with Metrohm Titrando system with 5 ml burete and a pH Aquatrode electrode with Pt1000 for temperature measurement Measurements of CO2 Certified Reference Material (CRM) were performed in order to control the accuracy of the alkalinity measurements. The accuracy of the alkalinity measurements (i.e. including sampling errors) was better than ±3 µmol/kg. The precision of the alkalinity measurements was better than ±2 µmol/kg determined from repeated samples of the same sample, although no proper reproducibility analysis was done during the cruise. The pH, which was measured by the electrode, was corrected to obtain the closest mean alkalinity to the CRM. This pH correction was never larger than 0.05. The daily drift of the system was determined by regular measurements of a substandard surface seawater at the beginning and end of each batch of analysis.; Replicate information: The precision of the alkalinity measurements was better than ±2 µmol/kg determined from repeated samples of the same sample, although no proper reproducibility analysis was done during the cruise.; Standardization description: with CRMs; Standardization frequency: every batch; CRM manufacturer: Dickson's lab; Preservation method: dark and cold place; Preservative volume: none; Preservative correction: none; Uncertainty: 3; Quality flag convention: WOCE flags; Method reference: Pérez, F. F. and Fraga, F. (1987) A precise and rapid analytical procedure for alkalinity determination, Mar. Chem., 21, 169–182.; Researcher name: Marta Álvarez; Researcher institution: IEO-CSIC. Parameter or Variable: pH; Abbreviation: PHTS25P0; pH scale: Total scale (T); Observation type: Profile (discrete samples); In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Sampling instrument: Niskin bottle transferred to 10 cm cuvette; Analyzing instrument: spectrophotometer SHIMADZU UV2600.; Detailed sampling and analyzing information: pH was measured in cylindrical optical glass 10-cm pathlength cells with a manual spectrophotometric procedure (Clayton and Byrne, 1993 & Dickson et al., 2007) pH is reported in total scale at 25 ºC and at surface pressure. A double beam spectrophotometer was used, SHIMADZU UV2600. All the absorbance measurements were obtained in the thermostatted (25±0.2 ºC) cell compartment of the spectrophotometer. The temperature was controlled with a POLYSCIENCE (12L) thermostatic bath. Unpurified m-cresol purple (2mM Sigma Aldrich) was used and spiked (50 µL) with a repeatable pipette. The double addition applied to the absorbance ratios is the following: Rreal = Rmeasured – (-0.0048·Rm + 0.0033) which was obtained during the HOTMIX cruise a month after pH calculated with the Clayton & Byrne (1993). No other correction applied. The precision was estimated to be better than 0.001 pH units independently of the pH range. No TRIS or CRM were measured for pH; Replicate information: The precision was estimated to be better than 0.001 pH units independently of the pH range.; Standardization description: No TRIS or CRM were measured for pH; Standardization frequency: none; pH standard values: none; Temperature of standardization: none; At what temperature was pH reported: 25; Uncertainty: 0.005; Quality flag convention: WOCE flags; Method reference: Clayton, T. D. and Byrne, R. H. (1993). Spectrophotometric seawater pH measurements: total hydrogen ion concentration scale concentration scale calibration of m-cresol purple and at-sea results, Deep-Sea Res. Pt. I, 40, 2115–2129.; Researcher name: Marta Álvarez; Researcher institution: IEO-CSIC. Parameter or Variable: Dissolved oxygen (DO); Abbreviation: OXYGEN; Unit: umol/kg; Observation type: Profile (discrete samples); In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Sampling instrument: Niskin bottle; Analyzing instrument: Automated oxygen titrator using amperometric end-point detection (Langdon 2010).; Detailed sampling and analyzing information: Potentiometric titration with Metrohm Titrando system with 5 ml, blanks determined, following Langdon (2010), standarization with OSIL KIO3 0.01 N, precision better than ±1 µmol/kg from replicate analysis. Iodate additions were done with a multipipette.; Replicate information: The precision was estimated to be better than 1 umol/kg; Uncertainty: 1; Quality flag convention: WOCE flags; Method reference: Langdon, C. (2010) Determination of Dissolved Oxygen in Seaweater By Winkler Titration using Amperometric Technique. In, The GO-SHIP Repeat Hydrography Manual: A Collection of Expert Reports and Guidelines. Version 1, (eds Hood, E.M., C.L. Sabine, and B.M. Sloyan). 18pp.. (IOCCP Report Number 14; ICPO Publication Series Number 134). Available online at: http://www.go-ship.org/HydroMan.html.; Researcher name: Marta Álvarez; Researcher institution: IEO-CSIC. Parameter or Variable: Nitrate and Nitrite; Abbreviation: NITRATE; Unit: umol/kg; Observation type: Profile (discrete samples); Measured or calculated: Measured; Sampling instrument: Niskin bottle transferred to PP tubes; Analyzing instrument: Nutrient autoanalyzer; Detailed sampling and analyzing information: Samples were collected in 12mL PP tubes and inmediately frozen. Inorganic nutrient salts in seawater were determined by SFA (Segmented Flow Autoanalyzer) (Aminot & Kérouel, 2007) with a SEAL Analytical QuAAtro analyzer using colorimetric methods (Hydes et al.,2010 & Becker et al., 2020) RMNs (Reference Material for Nutrients in seawater) with different ranges of concentration were used for quality control and accuracy of our analysis Low Nutrient Seawater (surface seawater filtered and aged) is also used to control low nutrient concentrations. Samples were analyzed in 2019, so quality is questioned.; Replicate information: none; Uncertainty: high; Quality flag convention: WOCE flags; Researcher name: Marta Álvarez; Researcher institution: IEO-CSIC. Parameter or Variable: Phosphate concentration in sea water; Abbreviation: PHSPHT; Unit: umol/kg; Observation type: Profile (discrete samples); Sampling instrument: Niskin bottle transferred to PP tube; Analyzing instrument: Nutrient autoanalyzer; Detailed sampling and analyzing information: Samples were collected in 12mL PP tubes and inmediately frozen. Inorganic nutrient salts in seawater were determined by SFA (Segmented Flow Autoanalyzer) (Aminot & Kérouel, 2007) with a SEAL Analytical QuAAtro analyzer using colorimetric methods (Hydes et al.,2010 & Becker et al., 2020) RMNs (Reference Material for Nutrients in seawater) with different ranges of concentration were used for quality control and accuracy of our analysis Low Nutrient Seawater (surface seawater filtered and aged) is also used to control low nutrient concentrations. Samples were analyzed in 2019, so quality is questioned.; Uncertainty: high; Quality flag convention: WOCE flags; Researcher name: Marta Álvarez; Researcher institution: IEO-CSIC. Parameter or Variable: Silicate concentration in sea water; Abbreviation: SILCAT; Unit: umol/kg; Observation type: Profile (discrete samples); Measured or calculated: Measured; Sampling instrument: Niskin bottle transferred to PP tube; Analyzing instrument: Nutrient autoanalyzer; Detailed sampling and analyzing information: Samples were collected in 12mL PP tubes and inmediately frozen. Inorganic nutrient salts in seawater were determined by SFA (Segmented Flow Autoanalyzer) (Aminot & Kérouel, 2007) with a SEAL Analytical QuAAtro analyzer using colorimetric methods (Hydes et al.,2010 & Becker et al., 2020) RMNs (Reference Material for Nutrients in seawater) with different ranges of concentration were used for quality control and accuracy of our analysis Low Nutrient Seawater (surface seawater filtered and aged) is also used to control low nutrient concentrations. Samples were analyzed in 2019, so quality is questioned.; Uncertainty: high; Quality flag convention: WOCE flags; Researcher name: Marta Álvarez; Researcher institution: IEO-CSIC .

Lineage information for: dataset

Processing Steps

Parameter or Variable: Total alkalinity; Abbreviation: ALKALI; Unit: umol/kg; Observation type: Profile (discrete samples); In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Sampling instrument: Niskin bottle - transferred to Borosilicate bottle; Analyzing instrument: Potentiometric method; Type of titration: end point; Cell type (open or closed): open; Detailed sampling and analyzing information: Samples for total alkalinity determination were collected in 600mL borosilicate bottles and were analysed within one or three days after sampling, no poisoning was needed (Dickson et al., 2007) Samples were analysed following the double end point potentiometric technique by Pérez and Fraga (Mar. Chem., 1987) and Pérez et al. (CC.MM., 2000). Potentiometric titration with Metrohm Titrando system with 5 ml burete and a pH Aquatrode electrode with Pt1000 for temperature measurement Measurements of CO2 Certified Reference Material (CRM) were performed in order to control the accuracy of the alkalinity measurements. The accuracy of the alkalinity measurements (i.e. including sampling errors) was better than ±3 µmol/kg. The precision of the alkalinity measurements was better than ±2 µmol/kg determined from repeated samples of the same sample, although no proper reproducibility analysis was done during the cruise. The pH, which was measured by the electrode, was corrected to obtain the closest mean alkalinity to the CRM. This pH correction was never larger than 0.05. The daily drift of the system was determined by regular measurements of a substandard surface seawater at the beginning and end of each batch of analysis.; Replicate information: The precision of the alkalinity measurements was better than ±2 µmol/kg determined from repeated samples of the same sample, although no proper reproducibility analysis was done during the cruise.; Standardization description: with CRMs; Standardization frequency: every batch; CRM manufacturer: Dickson's lab; Preservation method: dark and cold place; Preservative volume: none; Preservative correction: none; Uncertainty: 3; Quality flag convention: WOCE flags; Method reference: Pérez, F. F. and Fraga, F. (1987) A precise and rapid analytical procedure for alkalinity determination, Mar. Chem., 21, 169–182.; Researcher name: Marta Álvarez; Researcher institution: IEO-CSIC.
Parameter or Variable: pH; Abbreviation: PHTS25P0; pH scale: Total scale (T); Observation type: Profile (discrete samples); In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Sampling instrument: Niskin bottle transferred to 10 cm cuvette; Analyzing instrument: spectrophotometer SHIMADZU UV2600.; Detailed sampling and analyzing information: pH was measured in cylindrical optical glass 10-cm pathlength cells with a manual spectrophotometric procedure (Clayton and Byrne, 1993 & Dickson et al., 2007) pH is reported in total scale at 25 ºC and at surface pressure. A double beam spectrophotometer was used, SHIMADZU UV2600. All the absorbance measurements were obtained in the thermostatted (25±0.2 ºC) cell compartment of the spectrophotometer. The temperature was controlled with a POLYSCIENCE (12L) thermostatic bath. Unpurified m-cresol purple (2mM Sigma Aldrich) was used and spiked (50 µL) with a repeatable pipette. The double addition applied to the absorbance ratios is the following: Rreal = Rmeasured – (-0.0048·Rm + 0.0033) which was obtained during the HOTMIX cruise a month after pH calculated with the Clayton & Byrne (1993). No other correction applied. The precision was estimated to be better than 0.001 pH units independently of the pH range. No TRIS or CRM were measured for pH; Replicate information: The precision was estimated to be better than 0.001 pH units independently of the pH range.; Standardization description: No TRIS or CRM were measured for pH; Standardization frequency: none; pH standard values: none; Temperature of standardization: none; At what temperature was pH reported: 25; Uncertainty: 0.005; Quality flag convention: WOCE flags; Method reference: Clayton, T. D. and Byrne, R. H. (1993). Spectrophotometric seawater pH measurements: total hydrogen ion concentration scale concentration scale calibration of m-cresol purple and at-sea results, Deep-Sea Res. Pt. I, 40, 2115–2129.; Researcher name: Marta Álvarez; Researcher institution: IEO-CSIC.
Parameter or Variable: Dissolved oxygen (DO); Abbreviation: OXYGEN; Unit: umol/kg; Observation type: Profile (discrete samples); In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Sampling instrument: Niskin bottle; Analyzing instrument: Automated oxygen titrator using amperometric end-point detection (Langdon 2010).; Detailed sampling and analyzing information: Potentiometric titration with Metrohm Titrando system with 5 ml, blanks determined, following Langdon (2010), standarization with OSIL KIO3 0.01 N, precision better than ±1 µmol/kg from replicate analysis. Iodate additions were done with a multipipette.; Replicate information: The precision was estimated to be better than 1 umol/kg; Uncertainty: 1; Quality flag convention: WOCE flags; Method reference: Langdon, C. (2010) Determination of Dissolved Oxygen in Seaweater By Winkler Titration using Amperometric Technique. In, The GO-SHIP Repeat Hydrography Manual: A Collection of Expert Reports and Guidelines. Version 1, (eds Hood, E.M., C.L. Sabine, and B.M. Sloyan). 18pp.. (IOCCP Report Number 14; ICPO Publication Series Number 134). Available online at: http://www.go-ship.org/HydroMan.html.; Researcher name: Marta Álvarez; Researcher institution: IEO-CSIC.
Parameter or Variable: Nitrate and Nitrite; Abbreviation: NITRATE; Unit: umol/kg; Observation type: Profile (discrete samples); Measured or calculated: Measured; Sampling instrument: Niskin bottle transferred to PP tubes; Analyzing instrument: Nutrient autoanalyzer; Detailed sampling and analyzing information: Samples were collected in 12mL PP tubes and inmediately frozen. Inorganic nutrient salts in seawater were determined by SFA (Segmented Flow Autoanalyzer) (Aminot & Kérouel, 2007) with a SEAL Analytical QuAAtro analyzer using colorimetric methods (Hydes et al.,2010 & Becker et al., 2020) RMNs (Reference Material for Nutrients in seawater) with different ranges of concentration were used for quality control and accuracy of our analysis Low Nutrient Seawater (surface seawater filtered and aged) is also used to control low nutrient concentrations. Samples were analyzed in 2019, so quality is questioned.; Replicate information: none; Uncertainty: high; Quality flag convention: WOCE flags; Researcher name: Marta Álvarez; Researcher institution: IEO-CSIC.
Parameter or Variable: Phosphate concentration in sea water; Abbreviation: PHSPHT; Unit: umol/kg; Observation type: Profile (discrete samples); Sampling instrument: Niskin bottle transferred to PP tube; Analyzing instrument: Nutrient autoanalyzer; Detailed sampling and analyzing information: Samples were collected in 12mL PP tubes and inmediately frozen. Inorganic nutrient salts in seawater were determined by SFA (Segmented Flow Autoanalyzer) (Aminot & Kérouel, 2007) with a SEAL Analytical QuAAtro analyzer using colorimetric methods (Hydes et al.,2010 & Becker et al., 2020) RMNs (Reference Material for Nutrients in seawater) with different ranges of concentration were used for quality control and accuracy of our analysis Low Nutrient Seawater (surface seawater filtered and aged) is also used to control low nutrient concentrations. Samples were analyzed in 2019, so quality is questioned.; Uncertainty: high; Quality flag convention: WOCE flags; Researcher name: Marta Álvarez; Researcher institution: IEO-CSIC.
Parameter or Variable: Silicate concentration in sea water; Abbreviation: SILCAT; Unit: umol/kg; Observation type: Profile (discrete samples); Measured or calculated: Measured; Sampling instrument: Niskin bottle transferred to PP tube; Analyzing instrument: Nutrient autoanalyzer; Detailed sampling and analyzing information: Samples were collected in 12mL PP tubes and inmediately frozen. Inorganic nutrient salts in seawater were determined by SFA (Segmented Flow Autoanalyzer) (Aminot & Kérouel, 2007) with a SEAL Analytical QuAAtro analyzer using colorimetric methods (Hydes et al.,2010 & Becker et al., 2020) RMNs (Reference Material for Nutrients in seawater) with different ranges of concentration were used for quality control and accuracy of our analysis Low Nutrient Seawater (surface seawater filtered and aged) is also used to control low nutrient concentrations. Samples were analyzed in 2019, so quality is questioned.; Uncertainty: high; Quality flag convention: WOCE flags; Researcher name: Marta Álvarez; Researcher institution: IEO-CSIC .

Acquisition Information (collection)
Instrument	CTD Niskin bottle nutrient autoanalyzer pH sensor temperature sensor thermosalinograph titrator
Platform	RV Sarmiento De Gamboa

Last Modified: 2024-07-22T12:48:28Z
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