Abstract:

The remotely operated undulating towed vehicle known as the Scanfish was equipped with a SEA-BIRD Scientific fastcast 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 for 1-2 hour durations in four separate sampling sections from the R/V Pelican on November 6-7, 2015 during the Fall CONCORDE Cruise that took place from November 2-7, 2015. The dataset includes only the raw files. 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.

Suggested Citation:

Alan Weidemann, Jeffrey Book, Inia Soto, Wesley Goode, Mark Hulbert, Andrew Quaid. 2020. Raw data: CTD, optical, and oxygen data from the remotely operated undulating towed vehicle (Scanfish) collected during fall R/V Pelican cruise PE16-11 in the Mississippi Bight from 2015-11-05 to 2015-11-07. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/n7-jf54-gs81

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-a, [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 (BetaP(532), [m^-1 sr^-1]), Backscattering of particles at 532 nm (bbP(532), [m^-1 sr^-1]), Total Backscattering at 532 nm (bb(532), [m^-1 sr^-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 sr^-1]), Total Backscattering at 660 nm (bb(660), [m^-1 sr^-1]), Attenuation coefficient (9c, [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, 503.5, 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, [V]), 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 (VSm [V] and VA [V])

Methods:

The remotely operated undulating towed vehicle known as the Scanfish was towed for 1-2 hour durations in four separate sampling sections from the R/V Pelican on November 6-7, 2015 during the Fall CONCORDE Cruise. Data collection was interrupted by an internal setting that stopped data collection if the Scanfish reached an internal heating threshold. The scanfish was equipped with a Sea-Bird Scientific fastcast 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. All the instruments were interfaced with a WET Labs DH4 data logger.

Individual Files: