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OAS accession Detail for 0084544, meta_version: 6. Current meta_version is: 12
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| accessions_id: | 0084544 | archive |
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| Title: | Dissolved inorganic carbon, alkalinity, nitrate+nitrite, phosphate, silicate, dissolved oxygen, AOU, temperature, and salinity collected by CTD profiles from R/V Aegaeo in Adriatic Sea from February 9, 1995 to February 10, 1995 (NODC Accession 0084544) |
| Abstract: | NODC Accession 0084544 includes chemical, physical, profile data collected aboard the AEGAEO in Adriatic Sea, Mediterranean Sea from [start date] to [end date] 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. |
| Date received: | 20120124 |
| Start date: | 19950209 |
| End date: | 19950210 |
| Seanames: | |
| West boundary: | 18.5083 |
| East boundary: | 19.3 |
| North boundary: | 39.8333 |
| South boundary: | 39.8333 |
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| Instrument types: | |
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| Submitter: | Kozyr, Alex |
| Submitting institution: | Carbon Dioxide Information Analysis Center |
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| Number of observations: | |
| Supplementary information: | Dataset ID: HCMR_OTRANTO-5 Cruise TCO2 Analysis Method: The seawater samples for the determination of AT and CT 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 to prevent further biological activity, stored at room temperature away from light and analysed on shore as soon as possible. AT and CT 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 AT corresponds to the carbonic acid endpoint and the CT concentration is computed by the difference between the two endpoints, which were calculated using a modified Gran approach, a procedure recognized by DOE (1994). Standardization Technique: CRM Batch Number: #24 supplied by Dr A.G. Dickson of Scripps Institution of Oceanography, La Jolla, CA, USA CRM Analysis Info: Poisoning Info: 0.2-0.5 mL depending on sample volume Poisoning Correction Description: Poison Volume: 0.2-0.5 mL depending on sample volume Accuracy Info: The analytical precision for CT based on duplicate seawater samples was 6.3 umol/kg. The accuracy of CT 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 +/-5.6 umol/kg. Method References: 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 Alkalinity: Curve Fitting Method: Modified Gran approach Cell Type: thermostated closed cell Accuracy Info: The analytical precision for AT based on duplicate seawater samples was 5.3 umol/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 umol/kg. Method References: 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/oceanspCO2 Data. |
| Availability date: | |
| Metadata version: | 6 |
| Keydate: | 2012-01-24 16:17:31+00 |
| Editdate: | 2012-11-14 16:29:12+00 |