Abstract:

The remotely operated undulating towed vehicle known as the ScanFish was equipped with a Sea-Bird Scientific FastCAT CTD (SBE-49) and oxygen sensor (SBE-43), Sea-Bird Scientific-Satlantic OCR-507 multispectral radiometer, and four Sea-Bird Scientific-WET Labs optical instruments: Spectral Absorption and Attenuation meter (AC-s), ECO Triplet Fluorimeter (FL3: chlorophyll-a, Color Dissolved Organic Matter (CDOM) and Phycoerythrin), ECO Triplet Backscattering sensor (BB3: 470 nm, 532 nm, 660 nm) and a C-Star Transmissometer. The scanfish was towed continuously from the R/V Pelican cruise PE16-19A for four days (2016-03-31 22:45 UTC through 2016-04-02 23:47 UTC) during the first leg of the Spring CONCORDE cruise that took place from 2016-03-29 to 2016-04-03. The dataset includes only the raw files. Processed data can be found under GRIIDC Unique Dataset Identifier (UDI) R4.x260.000:0086 (DOI: 10.7266/N71N7ZK4).

Suggested Citation:

Alan Weidemann, Jeffrey Book, Inia Soto, and Wesley Goode. 2020. Raw data: CTD, optical, and oxygen data from the remotely operated undulating towed vehicle (ScanFish) collected during the R/V Pelican cruise PE16-19A in the northern Gulf of Mexico from 2016-03-31 to 2016-04-02. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/DS262YWK

Purpose:

Characterize the seasonal bio-optical and physical properties of the Mississippi Sound and Bight. Capture the tri-dimensional physical and optical properties of the Mississippi and Mobile River Plumes.

Data Parameters and Units:

Year [YYYY], Month [MM], Day [DD], Hour [HH], Minutes [MM], Seconds [SS], Matlab_time [UTC-6), Latitude [decimal degrees], Longitude [decimal degrees], Pressure [dbar], Temperature [°C], Conductivity [S/m], Salinity [PSU]) Chlorophyll fluorescence (CHL [ug/L]), Phycoerythrin (PE, [ppb]), Colored Dissolved Organic Matter fluorescence (CDOM, [ppb]), Total Volume Scattering at 470 nm (Beta(470), [m^-1 sr^-1]), Volume Scattering of Particles at 470 nm (BetaP(470), m^-1 sr^-1]), Backscattering of particles at 470 nm (bbP(470), [m^-1]}, Total Backscattering at 470 nm (bb(470), [m^-1]), Total Volume Scattering at 532 nm (Beta(532), [m^-1 sr^-1], Volume Scattering of Particles at 532 nm (Beta(532), [m^-1 sr^-1]), Backscattering of particles at 532 nm (bbP(532), [m^-1]), Total Backscattering at 532 nm (bb(532), [m^-1]), Total Volume Scattering at 660 nm (Beta(660), [m^-1 sr-1]), Volume Scattering of Particles at 660 nm (BetaP(660), [m^-1 sr^-1]), Backscattering of particles at 660 nm (bbP(660), [m^-1]), Total Backscattering at 660 nm (bb(660), [m^-1]), Attenuation coefficient (c, [m^-1; wavelengths: 399.6, 404.3, 408.5, 412.8, 417.1, 422.6, 427.6, 431.8, 436.4, 440.9, 445.6, 450.9, 455.5, 459.7, 464.1, 469.0, 474.0, 479.0, 483.8, 488.3, 492.8, 497.0, 501.7, 506.4, 511.4, 516.5, 521.5, 525.8, 530.3, 534.8, 539.6, 543.9, 548.8, 553.4, 557.5, 561.6, 565.9, 570.5, 574.7, 578.8, 583.2, 587.8, 592.5, 596.9, 602.1, 606.6, 611.3, 616.0, 620.7, 625.5, 629.9, 634.4, 638.7, 643.1, 647.8, 652.7, 657.2, 661.9, 666.4, 670.9, 675.2, 679.6, 683.8, 688.2, 692.3, 696.3, 700.4, 704.1, 707.8, 711.3, 715.0, 718.8, 722.0, 725.1, 728.8, 731.9, 734.8, 737.8, 741.0, 743.7, 746.2, 748.7, 751.1]), Absorption coefficient (a, [m^-1; wavelengths: 401.0, 405.7,410.3, 414.4, 418.9, 424.0, 429.0, 433.2, 438.0, 442.5, 447.4, 452.5, 456.9, 461.5, 466.1, 470.6, 475.9, 480.6, 485.5, 489.7, 494.6, 498.8, 5^03.5, 508.0, 513.0, 518.0, 523.0, 527.5, 532.0, 536.5, 541.3, 545.7, 550.2, 555.1, 558.2, 562.7, 566.8, 571.3, 575.4, 579.5, 583.9, 588.5, 592.7, 597.4, 602.1, 606.8, 611.7, 616.4, 621.2, 625.5, 630.0, 634.5, 639.0, 643.5, 648.1, 652.5, 657.3, 661.9, 666.2, 670.9, 675.4, 679.6, 683.8, 688.1, 692.1, 696.2, 699.9, 703.7, 707.5, 710.8, 714.5, 718.0, 721.6, 724.8, 728.4, 731.5, 734.5, 737.0, 740.5, 743.0, 745.3, 748.3, 750.8]), Transmittance (CSTAR, [Volts]), Downwelling Irradiance (ED, [µW cm^-2 nm^-1]; wavelengths: 411.4, 443.3, 490.6, 532.7, 555.4, 669.5]), Photosynthetically Available Radiation (PAR, [µMol m^-2 sec^-1]), Ancillary measurements for the OCR instrument (VS, [Volts and VA, [Volts]). Please note that raw files allow for the optical data to be processed with different scattering algorithms. A document on how to process these files is included. WET Labs software to process the files is publicly available.

Instruments:

Seabird SBE49 FastCAT, EIVA ScanFish ROTV

Individual Files: