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OAS accession Detail for 0278472
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| accessions_id: | 0278472 | archive |
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| Title: | CARIACO time series individual CTD profiles from B/O Hermano Gines HG93_CARIACO in the CARIACO basin from 1995-2017 (CARIACO project) (NCEI Accession 0278472) |
| Abstract: | This dataset contains biological, chemical, optical, and physical data collected on B/O Hermano Gines during cruise HG93_CARIACO in the Caribbean Sea from 1995-11-03 to 2017-01-12. These data include Nitrogen, O2 saturation, Oxygen in volts, PAR, beam attenuation, conductivity, depth, dissolved Oxygen, fluorescence, potential temperature, salinity calculated from CTD primary sensors, sigma-t, sigma-theta potential density, water pressure, and water temperature. The instruments used to collect these data include CTD Sea-Bird 25, CTD Sea-Bird SEACAT 19, Sea Tech Fluorometer, Sea-Bird SBE 43 Dissolved Oxygen Sensor, and Wet Labs CSTAR Transmissometer. These data were collected by Anadiuska Rondon, Jaimie Rojas, Javier Gutierrez, Juan Capelo, Laurencia Guzman, Ramon Varela, and Yrene Astor of Estacion de Investigaciones Marinas de Margarita, Dr Gordon T. Taylor and Dr Mary I. Scranton of Stony Brook University - MSRC, Claudia Benitez-Nelson and Dr Robert C. Thunell of University of South Carolina, and Digna Rueda-Roa, Dr Frank Muller-Karger, Dr Kent Fanning, Enrique Montes, Kristen N. Buck, and Laura Lorenzoni of University of South Florida as part of the "CARIACO Ocean Time-Series Program (CARIACO)" project and "Ocean Carbon and Biogeochemistry (OCB)", "Ocean Time-series Sites (Ocean Time-series)", and "U.S. Joint Global Ocean Flux Study (U.S. JGOFS)" programs. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2019-07-17. The following is the text of the dataset description provided by BCO-DMO: CARIACO time series individual CTD profiles Dataset Description: The CARIACO Ocean Time-Series Program (formerly known as CArbon Retention In A Colored Ocean) started on November 1995 (CAR-001) and ended on January 2017 (CAR-232). Monthly cruises were conducted to the CARIACO station (10.50° N, 64.67° W) onboard the R/V Hermano Ginés of the Fundación La Salle de Ciencias Naturales de Venezuela. During each cruise, a minimum of four hydrocasts were performed to collect a suite of core monthly observations. We conducted separate shallow and deep casts to obtain a better vertical resolution of in-situ Niskin-bottles samples for chemical observations, and for productivity, phytoplankton, and pigment observations. This collection of data comprises all the Individual CTD profiles from the Cariaco basin taken as part of the CARIACO Ocean Time-Series Program from November 1995 to January 2017. These include all the CTD profiles taken during the monthly hydrographic cruises at the CARIACO station (10.50° N, 64.67° W), as well as other CTD profiles from extra legs of the monthly cruises, and few spatial cruises collected in and around the Cariaco basin. CTD’s Salinity and Oxygen where calibrated with in-situ measurements (see Acquisition Description). This dataset is complimentary to the monthly “CTD Composite Profiles” (https://www.bco-dmo.org/dataset/3092), and many fields are very similar to that data-base. The difference with that dataset, is that here we present all the CTD casts for each cruise, the CTD profiles are single (not composite), and the salinity and oxygen profiles were calibrated with in-situ measurements, but fluorescence was no calibrated. More information can be found in the following web pages: Web page of the CARIACO Ocean Time-Series Program: http://imars.usf.edu/cariaco General description: http://www.imars.usf.edu/cariaco Methodology: http://imars.usf.edu/publications/methods-cariaco List of publications: http://imars.usf.edu/view/biblio/803738/year |
| Date received: | 20190717 |
| Start date: | 19951103 |
| End date: | 20170112 |
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| West boundary: | -65.584 |
| East boundary: | -64.387 |
| North boundary: | 11.37 |
| South boundary: | 10.05 |
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| Submitting institution: | Biological and Chemical Oceanography Data Management Office |
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| Supplementary information: | Acquisition Description: During each cruise, a minimum of four hydrocasts were performed to collect a suite of core monthly observations. Additional hydrocasts were performed for specific process studies, in the CARIACO station or in extra stations. We conducted separate shallow and deep casts to obtain better vertical resolution for chemical observations, and for productivity and pigment observations. Water was collected with a SeaBird rosette equipped with 12 (8 liter) teflon-coated Niskin bottles (bottle springs were also teflon-coated) at 20 depths between the surface and 1310 m. The rosette housed the CTD, which collected continuous profiles of temperature and salinity (SBE-19, SBE-25). The CTD also had an SBE-43 oxygen probe, and a Wetlabs ECO fluorometer outfitted for chlorophyll- a estimates. A C-Star transmissometer (660 nm, Wetlabs) was also part of the instrument suite. Beam attenuation measurements were added to the time series on its 11th month, originally using a SeaTech transmissometer. The rosette was controlled with a SeaBird deck unit via conducting cable, but alternatively has been actuated automatically based on pressure recordings via an Autofire Module (SBE AFM) when breaks in cable conductivity have occurred. Between November 1995 and September 1996, three separate SBE-19 CTDs were used in repeated casts until a reliable salinity profile was obtained below the oxycline. The SBE-19 model CTDs frequently failed to provide reliable conductivity values below the oxycline in the Cariaco Basin. Starting in September 1996, the SBE-19 CTDs were replaced by an SBE-25 CTD, which provided extremely accurate and reliable data in anoxic waters. All CTDs were calibrated at the Sea-Bird factory once per year. The accuracy of the pressure sensor is 3.5 m and has a resolution of 0.7 m. The temperatures accuracy is 0.002°C with a resolution of 0.0003°C. The conductivity accuracy is 0.003 mmho/cm with a resolution of 0.0004 mmho/cm. Discrete Salinity Continuous salinity profiles were calculated from the CTD measurements. Discrete salinity samples were analyzed using a Guildline Portasal 8410 salinometer standardized with IAPSO Standard Seawater, with a precision of better than ± 0.003 and a resolution of 0.0003 mS/cm at 15° C and 35 psu, the accuracy was ±0.003 at the same set point temperature as standardization and within -2° and +4°C of ambient. These salinity values were used to check, and when necessary calibrate, the CTD salinity profiles. Discrete Oxygen Continuous dissolved oxygen (O2) profiles were obtained with a SBE-43 Dissolved Oxygen Sensor coupled to the SBE-25 CTD. Discrete oxygen samples were collected in duplicate using glass-stoppered bottles and analyzed by Winkler titration (Strickland and Parsons, 1972, as modified by Aminot, 1983). The analytical precision for discrete oxygen analysis was ±3 mM, based on analysis of duplicate samples, with a detection limit of 5 mM. The in-situ oxygen values were used to check, and when necessary calibrate, the CTD oxygen profiles. A detailed log for each cruise with sensors used, calibrations, malfunctions, etc. can be found in the supplemental document . |
| Availability date: | |
| Metadata version: | 1 |
| Keydate: | 2023-05-19 04:59:10+00 |
| Editdate: | 2023-05-19 04:59:59+00 |