Dissolved inorganic carbon (DIC), total alkalinity, water temperature, salinity and other variables collected from discrete sample and profile observations during the R/V Marion Dufresne OISO-22 cruise (EXPOCODE 35MV20130209) in the South Indian Ocean and the corresponding Southern Ocean sector from 2013-02-10 to 2013-03-09 (NCEI Accession 0290746)
INVESTIGATORS:
Claire Lo Monaco 
- LOCEAN-IPSL / Sorbonne University, Paris, France
- LOCEAN-IPSL / Sorbonne University, Paris, France
Nicolas Metzl
- LOCEAN-IPSL / CNRS, Sorbonne Universite, Paris, France
- LOCEAN-IPSL / CNRS, Sorbonne Universite, Paris, FrancePACKAGE DESCRIPTION: This dataset is part of the long-term monitoring program OISO (Ocean Indien Service d'Observations) initiated in 1998, and covering contrasting regions in the South-West Indian Ocean from the subtropics to the Antarctic zone. It includes hydrological and biogeochemical measurements (temperature, salinity, oxygen, total CO2, alkalinity, nutrients, chlorophyll-a, d13C and d18O) collected in the water column (9 stations) using a rosette-CTD equipped with 24 Niskin bottles. Most of the samples were collected from the surface down to 1200m, except for 2 deep stations (down to the bottom at 30°S and 56.5°S). During the OISO-22 cruise we also collected underway fCO2 data (NCEI Accession 0116410), as well as underway total CO2 and alkalinity data (NCEI Accession 0173575) and complementary parameters collected in surface waters every 4h to 8h (nutrients, chlorophyll-a, d13C and d18O). The OISO data are regularly included in international data syntheses (SOCAT, GLODAP).
CITE AS: Lo Monaco, Claire; Metzl, Nicolas; Aït-Ouferoukh, Lydia; Gomez, Renaud; Howa, Hélène; Meilland, Julie; Pierre, Catherine; Ridame, Céline (2024). Dissolved inorganic carbon (DIC), total alkalinity, water temperature, salinity and other variables collected from discrete sample and profile observations during the R/V Marion Dufresne OISO-22 cruise (EXPOCODE 35MV20130209) in the South Indian Ocean and the corresponding Southern Ocean sector from 2013-02-10 to 2013-03-09 (NCEI Accession 0290746). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/eyca-bk79. Accessed [date].
DATA LICENSE:
- This dataset is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) License.
- https://creativecommons.org/licenses/by/4.0/
IDENTIFICATION INFORMATION FOR THIS DATA PACKAGE:
NCEI ACCESSION: 0290746
NCEI DOI: https://doi.org/10.25921/eyca-bk79
EXPOCODE: 35MV20130209;
CRUISE ID: OISO-22;
SECTION/LEG: OISO;
TYPES OF STUDY:
Discrete measurement;Profile;
TEMPORAL COVERAGE:
SPATIAL COVERAGE:
GEOGRAPHIC NAMES:
PLATFORMS:
RESEARCH PROJECT(S):
Discrete measurement;Profile;
TEMPORAL COVERAGE:
START DATE: 2013-02-10
END DATE: 2013-03-09
SPATIAL COVERAGE:
NORTH: -26
WEST: 49
EAST: 81
SOUTH: -56
GEOGRAPHIC NAMES:
South Indian Ocean;Southern Ocean;
PLATFORMS:
Marion Dufresne (ID: 35MV);
RESEARCH PROJECT(S):
none;
VARIABLES / PARAMETERS:
| Dissolved Inorganic Carbon | |
|---|---|
| Abbreviation: | TCO2 |
| Unit: | µmol/kg |
| Observation type: | Profile |
| In-situ / Manipulation / Response variable: | IN-SITUOBSERVATION |
| Measured or calculated: | MEASURED |
| Sampling instrument: | Niskin bottles |
| Analyzing instrument: | Metrohm titrator (794 Basic Titrino) |
| Detailed sampling and analyzing information: | Seawater was collected in 500 ml glass bottles for the simultaneous analysis of total CO2 and total alkalinity. The samples were poisoned and stored in the dark in a cold environment. Measurements were performed onboard within a few days following a potentiometric titration method (Edmond, 1970, DSR), using an automated system with a closed cell described by Metzl et al. (2006, DSR). The equivalence point is determined using a non-linear regression method (D.O.E., 1994, eds. ORNL/CDIAC-74). |
| Replicate information: | Deep replicate samples were collected from two different Niskin bottles (1200m or bottom). The mean difference between two deep replicates was 1.3±1.9 µmol/kg (n=9). |
| Standardization description: | Measurements were calibrated using Certified Reference Materials (CRMs) |
| Standardization frequency: | Twice a day |
| CRM manufacturer: | Dr. A. Dickson, SIO, University of California |
| CRM batch number: | 111, 119 |
| Preservation method: | HgCl2 |
| Preservative volume: | 300 µL of saturated solution |
| Preservative correction: | no correction |
| Uncertainty: | 3 µmol/kg |
| Quality flag convention: | WOCE/GLODAP (2 Acceptable, 3 Questionable, 4 Known bad, 9 No data) |
| Method reference: | Metzl, N., C.Brunet, Jabaud-Jan A, A.Poisson and B.Schauer, 2006. Summer and winter air-sea CO2 fluxes in the Southern Ocean Deep Sea Res I, 53, 1548-1563, https://doi.org/10.1016/j.dsr.2006.07.006 |
| Researcher name: | C. Lo Monaco |
| Researcher institution: | LOCEAN-IPSL, Sorbonne Universite |
| Total alkalinity | |
|---|---|
| Abbreviation: | TA |
| Unit: | µmol/kg |
| Observation type: | Profile |
| In-situ / Manipulation / Response variable: | IN-SITUOBSERVATION |
| Measured or calculated: | MEASURED |
| Sampling instrument: | Niskin bottles |
| Analyzing instrument: | Metrohm titrator (794 Basic Titrino) |
| Type of titration: | Potentiometric titration |
| Cell type (open or closed): | CLOSED |
| Curve fitting method: | non-linear regression method (D.O.E., 1994, eds. ORNL/CDIAC-74) |
| Detailed sampling and analyzing information: | Seawater was collected in 500 ml glass bottles for the simultaneous analysis of total CO2 and total alkalinity. The samples were poisoned and stored in the dark in a cold environment. Measurements were performed onboard within a few days following a potentiometric titration method (Edmond, 1970, DSR), using an automated system with a closed cell described by Metzl et al. (2006, DSR). The equivalence point is determined using a non-linear regression method (D.O.E., 1994, eds. ORNL/CDIAC-74). |
| Replicate information: | Deep replicate samples were collected from two different Niskin bottles (1200m or bottom). The mean difference between two deep replicates was 2.7±3.5 µmol/kg (n=9). |
| Standardization description: | Measurements were calibrated using Certifie Referenced Materials (CRMs) |
| Standardization frequency: | Twice a day |
| CRM manufacturer: | Dr. A. Dickson, SIO, University of California |
| CRM batch number: | 111, 119 |
| Preservation method: | HgCl2 |
| Preservative volume: | 300 µL of saturated solution |
| Preservative correction: | no correction |
| Uncertainty: | 3 µmol/kg |
| Quality flag convention: | WOCE/GLODAP (2 Acceptable, 3 Questionable, 4 Known bad, 9 No data) |
| Method reference: | Metzl, N., C.Brunet, Jabaud-Jan A, A.Poisson and B.Schauer, 2006. Summer and winter air-sea CO2 fluxes in the Southern Ocean Deep Sea Res I, 53, 1548-1563, https://doi.org/10.1016/j.dsr.2006.07.006 |
| Researcher name: | C. Lo Monaco |
| Researcher institution: | LOCEAN-IPSL, Sorbonne Universite |
| Pressure from CTD sensor | |
|---|---|
| Abbreviation: | CTD_PRES |
| Unit: | dbar |
| Observation type: | Profile |
| In-situ / Manipulation / Response variable: | IN-SITUOBSERVATION |
| Measured or calculated: | MEASURED |
| Sampling instrument: | CTD Sea-Bird SBE 911plus |
| Analyzing instrument: | SBE pressure sensor, SN: 0402, calibration: 1-May-2005 |
| Quality flag convention: | WOCE/GLODAP (2 Acceptable, 3 Questionable, 4 Known bad, 9 No data) |
| Researcher name: | C. Lo Monaco |
| Researcher institution: | LOCEAN-IPSL, Sorbonne Universite |
| Depth calculated from CTD_PRES | |
|---|---|
| Abbreviation: | Depth |
| Unit: | m |
| Observation type: | Profile |
| In-situ / Manipulation / Response variable: | IN-SITUOBSERVATION |
| Measured or calculated: | CALCULATED |
| Calculation method and parameters: | calculated from CTD_PRES using the Seabird processing software |
| Sampling instrument: | CTD Sea-Bird SBE 911plus |
| Analyzing instrument: | SBE pressure sensor, SN: 0402, calibration: 1-May-2005 |
| Quality flag convention: | WOCE/GLODAP (2 Acceptable, 3 Questionable, 4 Known bad, 9 No data) |
| Researcher name: | C. Lo Monaco |
| Researcher institution: | LOCEAN-IPSL, Sorbonne Universite |
| Temperature from CTD sensor | |
|---|---|
| Abbreviation: | CTD_TEMP |
| Unit: | degree Celsius |
| Observation type: | Profile |
| In-situ / Manipulation / Response variable: | IN-SITUOBSERVATION |
| Measured or calculated: | MEASURED |
| Sampling instrument: | CTD Sea-Bird SBE 911plus |
| Analyzing instrument: | SBE temperature sensor, SN: 1820, calibration: 23-Apr-2004 |
| Uncertainty: | 0.001 degree Celsius. |
| Quality flag convention: | WOCE/GLODAP (2 Acceptable, 3 Questionable, 4 Known bad, 9 No data) |
| Researcher name: | C. Lo Monaco |
| Researcher institution: | LOCEAN-IPSL, Sorbonne Universite |
| Salinity from CTD sensor | |
|---|---|
| Abbreviation: | CTD_SAL |
| Unit: | psu |
| Observation type: | Profile |
| In-situ / Manipulation / Response variable: | IN-SITUOBSERVATION |
| Measured or calculated: | CALCULATED |
| Calculation method and parameters: | Salinity calculated from conductivity using the Seabird processing software. |
| Sampling instrument: | CTD Sea-Bird SBE 911plus |
| Analyzing instrument: | SBE conductivity sensor, SN: 2706, calibration: 13-Nov-2012 |
| Detailed sampling and analyzing information: | CTD data were compared to Meas_Salinity and corrected by +0.018. After correction the mean difference between CTD and measured salinity is -0.003±0.011 (n=71). |
| Uncertainty: | 0.005 |
| Quality flag convention: | WOCE/GLODAP (2 Acceptable, 3 Questionable, 4 Known bad, 9 No data) |
| Researcher name: | C. Lo Monaco |
| Researcher institution: | LOCEAN-IPSL, Sorbonne Universite |
| Measured Salinity | |
|---|---|
| Abbreviation: | Meas_Salinity |
| Unit: | psu |
| Observation type: | Profile |
| In-situ / Manipulation / Response variable: | IN-SITUOBSERVATION |
| Measured or calculated: | MEASURED |
| Sampling instrument: | Niskin bottles |
| Analyzing instrument: | Guidline salinometer |
| Detailed sampling and analyzing information: | Sea water was collected in 150 ml salinity bottles provided by Ocean Scientific International Ltd. Samples were measured at LOCEAN (within 6 months). IAPSO standards were used (provided by Ocean Scientific International Ltd). |
| Uncertainty: | 0.005 |
| Quality flag convention: | WOCE/GLODAP (2 Acceptable, 3 Questionable, 4 Known bad, 9 No data) |
| Researcher name: | C. Lo Monaco |
| Researcher institution: | LOCEAN-IPSL, Sorbonne Universite |
| Dissolved oxygen from SBE sensor, uncorrected data | |
|---|---|
| Abbreviation: | CTD_OXY |
| Unit: | µmol/kg |
| Observation type: | Profile |
| In-situ / Manipulation / Response variable: | IN-SITUOBSERVATION |
| Measured or calculated: | MEASURED |
| Sampling instrument: | CTD Sea-Bird SBE 911plus |
| Analyzing instrument: | SBE Oxygen sensor, SN: 0359, calibration: 12-Nov-2012 |
| Uncertainty: | Uncorrected data |
| Quality flag convention: | WOCE/GLODAP (2 Acceptable, 3 Questionable, 4 Known bad, 9 No data) |
| Researcher name: | C. Lo Monaco |
| Researcher institution: | LOCEAN-IPSL, Sorbonne Universite |
| Dissolved oxygen from SBE sensor, corrected data | |
|---|---|
| Abbreviation: | CTD_OXY_CAL |
| Unit: | µmol/kg |
| Observation type: | Profile |
| In-situ / Manipulation / Response variable: | IN-SITUOBSERVATION |
| Measured or calculated: | MEASURED |
| Sampling instrument: | CTD Sea-Bird SBE 911plus |
| Analyzing instrument: | SBE Oxygen sensor, SN: 0359, calibration: 12-Nov-2012 |
| Detailed sampling and analyzing information: | Oxygen sensor data were corrected with respect to bottle data (Winkler titration) using linear regressions determined for each station. The calibrated oxygen data flagged good agree with the measured oxygen data to within +/-3 µmol/kg (the mean difference is -0.1±1.5, n=132). |
| Uncertainty: | 1 µmol/kg |
| Quality flag convention: | WOCE/GLODAP (2 Acceptable, 3 Questionable, 4 Known bad, 9 No data) |
| Researcher name: | C. Lo Monaco |
| Researcher institution: | LOCEAN-IPSL, Sorbonne Universite |
| Dissolved oxygen (Winkler) | |
|---|---|
| Abbreviation: | Meas_Oxygen |
| Unit: | µmol/kg |
| Observation type: | Profile |
| In-situ / Manipulation / Response variable: | IN-SITUOBSERVATION |
| Measured or calculated: | MEASURED |
| Sampling instrument: | Niskin bottles |
| Analyzing instrument: | Metrohm titrator |
| Detailed sampling and analyzing information: | Sea water was collected in calibrated glass bottles (150-200 ml), stored in the dark, and measured within 3 days. Dissolved oxygen was measured onboard following Winkler’s method with photometric detection (Williams and Jenkinson,1982). Iodate standard solutions provided by Ocean Scientific International Ltd were used as a reference. |
| Replicate information: | Deep replicate samples were collected from two different Niskin bottles (1200m or bottom). The mean difference between two deep replicates was 1.0±0.7 µmol/kg (n=5). |
| Uncertainty: | 1 µmol/kg |
| Quality flag convention: | WOCE/GLODAP (2 Acceptable, 3 Questionable, 4 Known bad, 9 No data) |
| Method reference: | Williams, P. J. LeB, and N. W. Jenkinson, 1982. A transportable microprocessor-controlled precise Winkler titration suitable for field station and shipboard use. Limnol. Oceanogr,. 27, 576-585. |
| Researcher name: | C. Lo Monaco |
| Researcher institution: | LOCEAN-IPSL, Sorbonne Universite |
| Silicic acid | |
|---|---|
| Abbreviation: | Silicate |
| Unit: | µmol/kg |
| Observation type: | Profile |
| In-situ / Manipulation / Response variable: | IN-SITUOBSERVATION |
| Measured or calculated: | MEASURED |
| Sampling instrument: | Niskin bottles |
| Analyzing instrument: | SEAL Analytical AA3 |
| Detailed sampling and analyzing information: | Sea water samples were immediately filtered (0.2 µm) in 20 ml plastic bottles, poisoned with 100 µL of HgCl2 (saturated solution). Samples were measured at LOCEAN following the segmented flow method described by Coverly et al. (2009), except for stations A3 and E measured at LOMIC (Banyuls, France) following the same protocole. |
| Quality flag convention: | WOCE/GLODAP (2 Acceptable, 3 Questionable, 4 Known bad, 9 No data) |
| Method reference: | Coverly, S. C., Aminot, A., and R. Kérouel, 2009. Nutrients in Seawater Using Segmented Flow Analysis, In Practical Guidelines for the Analysis of Seawater, Ed. Oliver Wurl, CRC Press, June 2009, doi: 10.1201/9781420073072.ch8. |
| Researcher name: | C. Lo Monaco |
| Researcher institution: | LOCEAN-IPSL, Sorbonne Universite |
| Nitrate + Nitrite | |
|---|---|
| Abbreviation: | NOx |
| Unit: | µmol/kg |
| Observation type: | Profile |
| In-situ / Manipulation / Response variable: | IN-SITUOBSERVATION |
| Measured or calculated: | MEASURED |
| Sampling instrument: | Niskin bottles |
| Analyzing instrument: | SEAL Analytical AA3 |
| Detailed sampling and analyzing information: | Sea water samples were immediately filtered (0.2 µm) in 20 ml plastic bottles, poisoned with 100 µL of HgCl2 (saturated solution). Samples were measured at LOCEAN following the segmented flow method described by Coverly et al. (2009), except for stations A3 and E measured at LOMIC (Banyuls, France) following the same protocole. |
| Quality flag convention: | WOCE/GLODAP (2 Acceptable, 3 Questionable, 4 Known bad, 9 No data) |
| Method reference: | Coverly, S. C., Aminot, A., and R. Kérouel, 2009. Nutrients in Seawater Using Segmented Flow Analysis, In Practical Guidelines for the Analysis of Seawater, Ed. Oliver Wurl, CRC Press, June 2009, doi: 10.1201/9781420073072.ch8. |
| Researcher name: | C. Lo Monaco |
| Researcher institution: | LOCEAN-IPSL, Sorbonne Universite |
| Nitrite | |
|---|---|
| Abbreviation: | Nitrite |
| Unit: | µmol/kg |
| Observation type: | Profile |
| In-situ / Manipulation / Response variable: | IN-SITUOBSERVATION |
| Measured or calculated: | MEASURED |
| Sampling instrument: | Niskin bottles |
| Analyzing instrument: | SEAL Analytical AA3 |
| Detailed sampling and analyzing information: | Sea water samples were immediately filtered (0.2 µm) in 20 ml plastic bottles, poisoned with 100 µL of HgCl2 (saturated solution) and stored in the fridge. Samples were measured at LOCEAN following the segmented flow method described by Coverly et al. (2009), except for stations A3 and E measured at LOMIC (Banyuls, France) following the same protocole. |
| Quality flag convention: | WOCE/GLODAP (2 Acceptable, 3 Questionable, 4 Known bad, 9 No data) |
| Method reference: | Coverly, S. C., Aminot, A., and R. Kérouel, 2009. Nutrients in Seawater Using Segmented Flow Analysis, In Practical Guidelines for the Analysis of Seawater, Ed. Oliver Wurl, CRC Press, June 2009, doi: 10.1201/9781420073072.ch8. |
| Researcher name: | C. Lo Monaco |
| Researcher institution: | LOCEAN-IPSL, Sorbonne Universite |
| Phosphate | |
|---|---|
| Abbreviation: | Phosphate |
| Unit: | µmol/kg |
| Observation type: | Profile |
| In-situ / Manipulation / Response variable: | IN-SITUOBSERVATION |
| Measured or calculated: | MEASURED |
| Sampling instrument: | Niskin bottles |
| Analyzing instrument: | Spectrophotometer |
| Detailed sampling and analyzing information: | Sea water samples were immediately filtered (0.2 µm) in 20 ml plastic bottles, poisoned with 100 µL of HgCl2 (saturated solution) and stored in the fridge. Samples were measured at LOMIC (Banyuls, France) following the segmented flow method described by Coverly et al. (2009). |
| Quality flag convention: | WOCE/GLODAP (2 Acceptable, 3 Questionable, 4 Known bad, 9 No data) |
| Method reference: | Coverly, S. C., Aminot, A., and R. Kérouel, 2009. Nutrients in Seawater Using Segmented Flow Analysis, In Practical Guidelines for the Analysis of Seawater, Ed. Oliver Wurl, CRC Press, June 2009, doi: 10.1201/9781420073072.ch8. |
| Researcher name: | C. Lo Monaco |
| Researcher institution: | LOCEAN-IPSL, Sorbonne Universite |
| Chlorophyll-a | |
|---|---|
| Abbreviation: | Chla |
| Unit: | µg/l |
| Observation type: | Profile |
| In-situ / Manipulation / Response variable: | IN-SITUOBSERVATION |
| Measured or calculated: | MEASURED |
| Sampling instrument: | Niskin bottles |
| Analyzing instrument: | Hitaschi F-4500 spectrofluorometer |
| Detailed sampling and analyzing information: | Sea water samples were collected in polycarbonate bottles (between 1L and 2L depending on fluorecence data), and immediately filtered on 25mm GF/F Whatman filters (pressure< 200 mbar). Filters were stored at -80°C. Fluorescence was measured at LOCEAN, using a Hitaschi F-4500 spectrofluorometer, after extraction of the filters in 90% acetone, following the method described by Neveux and Lantoine (1993, DSR) |
| Uncertainty: | 5% (replicate samples analysis) |
| Quality flag convention: | WOCE/GLODAP (2 Acceptable, 3 Questionable, 4 Known bad, 9 No data) |
| Method reference: | Neveux, J., and Lantoine, F.: Spectrofluorometric assay of chlorophylls and phaeopigments using the least squares approximation technique, Deep-Sea Res. I, 40(9), 1747-1765, 1993. |
| Researcher name: | C. Ridame |
| Researcher institution: | LOCEAN-IPSL, Sorbonne Universite |
PUBLICATIONS DESCRIBING THIS DATASET:
none;
ADDITIONAL INFORMATION:
none;
FUNDING AGENCY:
Institut National des Sciences de l’Univers (INSU), Institut polaire français Paul Emile Victor (IPEV), Institut Pierre Simon Laplace (IPSL), Sorbonne Universirty
PROJECT TITLE:
Océan Indien Service d'Observations (OISO)
PROJECT ID:
SUBMITTED BY: Claire Lo Monaco (Claire.LoMonaco@locean-ipsl.upmc.fr)
SUBMISSION DATE: 2024-04-02
