Discrete measurements of carbon dioxide and other parameters in the Aegean Sea during the HCMR OTRANTO-5 cruise from 1995-02-09 to 1995-02-10 (NCEI Accession 0084544)
INVESTIGATOR:
Emmanuel Papageorgiou
- National Centre for Marine Research, Athens, Greece
PACKAGE DESCRIPTION: This dataset includes oceanographic profile chemical, nutrient, and physical data collected aboard the AEGAEO in the Adriatic Sea and Mediterranean Sea from 19950209 to 19950210 and retrieved during cruise 36AE19950209, GN36199502905, OTRANTO-5-94. These data include ALKALINITY, DISSOLVED INORGANIC CARBON, DISSOLVED OXYGEN, NITRATE + NITRITE CONTENT (CONCENTRATION), OXYGEN - APPARENT UTILIZATION (AOU), PHOSPHATE, SALINITY, SILICATE, and TEMPERATURE. The instruments used to collect these data include CTD, and bottle. These data were collected by Evangelia Krasakopoulou and Ekaterini Souvermezoglou of Hellenic Centre for Marine Research (HCMR) - Institute of Oceanography.
CITE AS: Papageorgiou, Emmanuel; Krasakopoulou, Evangelia; Souvermezoglou, Ekaterini (2013). Discrete measurements of carbon dioxide and other parameters in the Aegean Sea during the HCMR OTRANTO-5 cruise from 1995-02-09 to 1995-02-10 (NCEI Accession 0084544). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.3334/cdiac/otg.hcmr_otr5_1995. Accessed [date].
DATA PACKAGES RELATED TO THIS ONE:
none;
none;
IDENTIFICATION INFORMATION FOR THIS DATA PACKAGE:
NCEI ACCESSION: 0084544
NCEI DOI: https://doi.org/10.3334/cdiac/otg.hcmr_otr5_1995
EXPOCODE: 36AE19950209;
CRUISE ID: COASTAL_HCMR_OTRANTO-5;
SECTION/LEG: MedSea;
TYPES OF STUDY:
Profile;
TEMPORAL COVERAGE:
SPATIAL COVERAGE:
GEOGRAPHIC NAMES:
PLATFORMS:
RESEARCH PROJECT(S):
Profile;
TEMPORAL COVERAGE:
START DATE: 1995-02-09
END DATE: 1995-02-10
SPATIAL COVERAGE:
NORTH: 39.8333
WEST: 18.5083
EAST: 19.3
SOUTH: 39.8333
GEOGRAPHIC NAMES:
Aegean Sea;
PLATFORMS:
R/V Aegaeo (ID: 36AE);
RESEARCH PROJECT(S):
none;
VARIABLES / PARAMETERS:
| Dissolved Inorganic Carbon | |
|---|---|
| Abbreviation: | TCABN |
| Observation type: | discrete |
| In-situ / Manipulation / Response variable: | In-situ observation |
| Sampling instrument: | Niskin Bottles |
| Detailed sampling and analyzing information: | The seawater samples for the determination of ALKALI and TCARBN were drawn into 500-1000 mL borosilicate glass bottles sealed with glass stoppers according to the collection methods of DOE (1994). The samples were poisoned with saturated mercuric chloride solution (Poison Volume (mL): 0.2-0.5 mL depending on sample volume) to prevent further biological activity, stored at room temperature away from light and analysed on shore as soon as possible. ALKALI and TCARBN measurements were preformed simultaneously using the potentiometric acid titration method in a closed cell, which was maintained at constant temperature (25 ± 0.1 ºC) by a thermostated water bath. The ionic strength of the hydrochloric acid solution (0.1 N) used for the titrations was adjusted with NaCl in order to be similar to that of the samples. The hydrochloric acid solution was added with an automatic burette (ABU 80, Radiometer) and the progress of the titration was monitored using a glass electrode/reference electrode pH cell (PHM-84, Radiometer). The burette and the pH-meter were interfaced with a computer using data-acquisition software. The ALKALI corresponds to the carbonic acid endpoint and the TCARBN concentration is computed by the difference between the two endpoints, which were calculated using a modified Gran approach, a procedure recognized by DOE (1994). The analytical precision for TCARBN based on duplicate seawater samples was 6.3 µmol Kg-1. The accuracy of TCARBN was assessed by CRM measurements and was ±5.6 µmol Kg-1. The analytical precision for ALKALI based on duplicate seawater samples was 5.3 µmol Kg-1. The accuracy of the ALKALI was assessed by CRM measurements and was ±3.2 µmol Kg-1. Batch #24 supplied by Dr A.G. Dickson (SIO,USA) were used to control the analytical precision. |
| CRM batch number: | #24 supplied by Dr A.G. Dickson of Scripps Institution of Oceanography, La Jolla, CA, USA |
| Total alkalinity | |
|---|---|
| Abbreviation: | ALKALI |
| Observation type: | discrete |
| In-situ / Manipulation / Response variable: | In-situ observation |
| Measured or calculated: | Measured |
| Sampling instrument: | Niskin Bottles |
| Type of titration: | potentiometric acid titration method |
| Cell type (open or closed): | thermostated closed cell |
| Curve fitting method: | Modified Gran approach |
| Detailed sampling and analyzing information: | The seawater samples for the determination of ALKALI and TCARBN were drawn into 500-1000 mL borosilicate glass bottles sealed with glass stoppers according to the collection methods of DOE (1994). The samples were poisoned with saturated mercuric chloride solution (Poison Volume (mL): 0.2-0.5 mL depending on sample volume) to prevent further biological activity, stored at room temperature away from light and analysed on shore as soon as possible. ALKALI and TCARBN measurements were preformed simultaneously using the potentiometric acid titration method in a closed cell, which was maintained at constant temperature (25 ± 0.1 ºC) by a thermostated water bath. The ionic strength of the hydrochloric acid solution (0.1 N) used for the titrations was adjusted with NaCl in order to be similar to that of the samples. The hydrochloric acid solution was added with an automatic burette (ABU 80, Radiometer) and the progress of the titration was monitored using a glass electrode/reference electrode pH cell (PHM-84, Radiometer). The burette and the pH-meter were interfaced with a computer using data-acquisition software. The ALKALI corresponds to the carbonic acid endpoint and the TCARBN concentration is computed by the difference between the two endpoints, which were calculated using a modified Gran approach, a procedure recognized by DOE (1994). The analytical precision for TCARBN based on duplicate seawater samples was 6.3 µmol Kg-1. The accuracy of TCARBN was assessed by CRM measurements and was ±5.6 µmol Kg-1. The analytical precision for ALKALI based on duplicate seawater samples was 5.3 µmol Kg-1. The accuracy of the ALKALI was assessed by CRM measurements and was ±3.2 µmol Kg-1. Batch #24 supplied by Dr A.G. Dickson (SIO,USA) were used to control the analytical precision. |
| Uncertainty: | The analytical precision for AT based on duplicate seawater samples was 5.3 μmol/kg. The accuracy of the AT was assessed by measurements of certified reference material (CRM, Batch #24 supplied by Dr A.G. Dickson of Scripps Institution of Oceanography, La Jolla, CA, USA) and was +/-3.2 μmol/kg. |
| Method reference: | DOE, 1994. Handbook of methods for the analysis of the various parameters of the carbon dioxide system in sea water, version 2, A.G. Dickson & C. Goyet (Eds.), ORNL/CDIAC-74. Available at: http://cdiac.esd.ornl.gov/oceans pCO2 Data: |
| CTD WATER TEMPERATURE | |
|---|---|
| Abbreviation: | CTDTMP |
| Unit: | DEG_C |
| Controlled vocabulary name: | CTD WATER TEMPERATURE |
| In-situ / Manipulation / Response variable: | in-situ |
| Researcher name: | E. Papageorgiou, A. Theocharis, D. Georgopoulos (HCMR) |
| SALINITY | |
|---|---|
| Abbreviation: | SALNTY |
| Controlled vocabulary name: | SALINITY |
| In-situ / Manipulation / Response variable: | in-situ |
| Researcher name: | E. Papageorgiou, A. Theocharis, D. Georgopoulos (HCMR) |
| Dissolved Oxygen | |
|---|---|
| Abbreviation: | OXYGEN |
| Unit: | UMOL/KG |
| Controlled vocabulary name: | Dissolved Oxygen |
| Observation type: | Bottle discrete |
| In-situ / Manipulation / Response variable: | in-situ |
| Researcher name: | E. Krasakopoulou (HCMR) |
| PHOSPHATE | |
|---|---|
| Abbreviation: | PHSPHT |
| Unit: | UMOL/KG |
| Controlled vocabulary name: | phosphate |
| Observation type: | Bottle discrete |
| In-situ / Manipulation / Response variable: | in-situ |
| Researcher name: | E. Souvermezoglou, E. Krasakopoulou (HCMR) |
| SILICATE | |
|---|---|
| Abbreviation: | SILCAT |
| Unit: | UMOL/KG |
| Controlled vocabulary name: | silicate |
| Observation type: | Bottle discrete |
| In-situ / Manipulation / Response variable: | in-situ |
| Researcher name: | E. Souvermezoglou, E. Krasakopoulou (HCMR) |
| NITRATE | |
|---|---|
| Abbreviation: | NITRAT |
| Unit: | UMOL/KG |
| Controlled vocabulary name: | nitrate |
| Observation type: | Bottle discrete |
| In-situ / Manipulation / Response variable: | in-situ |
| Researcher name: | E. Souvermezoglou, E. Krasakopoulou (HCMR) |
PUBLICATIONS DESCRIBING THIS DATASET:
Krasakopoulou, E., Souvermezoglou, E., Goyet, C. (2011). Anthropogenic CO2 fluxes in the Otranto Strait (E. Mediterranean) in February 1995. Deep Sea Research I 58, 1103-1114.
ADDITIONAL INFORMATION:
none;
FUNDING AGENCY:
SUBMITTED BY: Alex Kozyr (Alex.Kozyr@noaa.gov)
SUBMISSION DATE: 2013-01-14
REVISION DATE: 2022-05-20
PREVIOUS VERSIONS: Version 1.1Version 2.2
