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Sensors were deployed on a titanium trace metal rosette (TMR) in tandem with trace metal clean bottle samples during the RVIB Nathaniel B. Palmer cruise (NBP18-01) from December 2017 to February 2018 in coastal Antarctica. TMR casts were performed at 26 stations in the Amundsen Sea, Ross Sea and Terra Nova Bay. Parameters collected include pressure, temperature, conductivity, oxygen, fluorescence, beam transmission, PAR, and salinity.
The profiles in the dataset are from the up-cast of the TMR cast. More information on sensor data acquisition and processing can be found in "Data Report NBP18-01" from the United States Antarctic Program prepared by Matt Pullen and Bryan Chambers (see Supplemental Docs section). Trace metal rosette sensors are detailed on p.29.
For all duplicate sensors, the primary sensor was used for temperature and conductivity, and the secondary sensor was used for oxygen in the final hydrography dataset.
Problem report: The PAR sensor was only included on the TMR beginning at station 35.
The profiles in the dataset are from the up-cast of the TMR cast. More information on sensor data acquisition and processing can be found in "Data Report NBP18-01" (see Supplemental Docs section)
An instrument that measures height above a fixed surface. The data can be used to map ocean-surface topography and generate gridded surface height fields.
Unspecified Biospherical PAR. An irradiance sensor, designed to measure Photosynthetically Active Radiation (PAR).
The Sea-Bird SBE 911 plus is a type of CTD instrument package for continuous measurement of conductivity, temperature and pressure. The SBE 911 plus includes the SBE 9plus Underwater Unit and the SBE 11plus Deck Unit (for real-time readout using conductive wire) for deployment from a vessel. The combination of the SBE 9 plus and SBE 11 plus is called a SBE 911 plus. The SBE 9 plus uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 plus and SBE 4). The SBE 9 plus CTD can be configured with up to eight auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorescence, light (PAR), light transmission, etc.). more information from Sea-Bird Electronics
The Paroscientific 410K Pressure Transducer is an absolute pressure transducer with a Digiquartz pressure sensor and precision thermometer. Operates over a temperature range of 0-125 degC and a pressure range of 0-10000 psia with a typical accuracy of 0.01% and a resolution of 0.0001%.
PRR (Underwater): Biospherical Instruments PRR-800 PRR (Mast): Biospherical Instruments PRR-810
Radiometer is a generic term for a range of instruments used to measure electromagnetic radiation (radiance and irradiance) in the atmosphere or the water column. For example, this instrument category includes free-fall spectral radiometer (SPMR/SMSR System, Satlantic, Inc), profiling or deck cosine PAR units (PUV-500 and 510, Biospherical Instruments, Inc). This is a generic term used when specific type, make and model were not specified.
Trace metal rosette had hydrographic sensors including Sea-Bird 3plus 10500m temperature sensor
The Sea-Bird SBE 3plus water temperature sensor is designed for use on the SBE 9plus CTD system. The sensor operates over the range -5 to +35 °C, a resolution of 0.0003 °C at 24 Hz and an initial accuracy of ± 0.001 °C. The typical sampling rate is 24 Hz, and the sensor has a depth rating of 6800 meters (aluminium housing) or 10500 meters (titanium housing).
The Sea-Bird SBE 43 dissolved oxygen sensor is a redesign of the Clark polarographic membrane type of dissolved oxygen sensors. more information from Sea-Bird Electronics
Trace metal rosette had hydrographic sensors including Sea-Bird 4C 10500m conductivity sensor
The Sea-Bird SBE-4 conductivity sensor is a modular, self-contained instrument that measures conductivity from 0 to 7 Siemens/meter. The sensors (Version 2; S/N 2000 and higher) have electrically isolated power circuits and optically coupled outputs to eliminate any possibility of noise and corrosion caused by ground loops. The sensing element is a cylindrical, flow-through, borosilicate glass cell with three internal platinum electrodes. Because the outer electrodes are connected together, electric fields are confined inside the cell, making the measured resistance (and instrument calibration) independent of calibration bath size or proximity to protective cages or other objects.
Trace metal (TM) clean rosette bottle used for collecting trace metal clean seawater samples.
The Environmental Characterization Optics (ECO) series of single channel fluorometers delivers both high resolution and wide ranges across the entire line of parameters using 14 bit digital processing. The ECO series excels in biological monitoring and dye trace studies. The potted optics block results in long term stability of the instrument and the optional anti-biofouling technology delivers truly long term field measurements. more information from Wet Labs
The C-Star transmissometer has a novel monolithic housing with a highly intgrated opto-electronic design to provide a low cost, compact solution for underwater measurements of beam transmittance. The C-Star is capable of free space measurements or flow-through sampling when used with a pump and optical flow tubes. The sensor can be used in profiling, moored, or underway applications. Available with a 6000 m depth rating.
More information on Sea-Bird website: https://www.seabird.com/c-star-transmissometer/product?id=60762467717
Latitude of sampling location (South is negative)
Longitude of sampling location (West is negative)
Trace metal rosette Start datetime
Station number
Pressure of seawater from CTD pressure sensor
Depth of rosette from CTD altimeter
Temperature of seawater from CTD temperature sensor
Conductivity of seawater from CTD conductivity sensor
Concentration of dissolved oxygen from CTD oxygen sensor
Fluorescence of seawater from CTD fluorometer
Beam Transmission from CTD Transmissometer
Photosynthetically Active Radiation (PAR) from CTD PAR sensor
Salinity derived from conductivity measurements
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