Abstract:

The Multiple Opening Closing Net and Environmental Sensing System[s] [MOCNESS] deployed during the DEEPEND field program collects data (e.g., pressure, temperature, conductivity, volume filtered, horizontal and vertical velocity, latitude, and longitude) from several sensors while the instrument is in use. These data helped characterize the environment and assess the orientation and speed of the MOCNESS. The flow and net angle were used to calculate the volume of water filtered for each net. The dataset includes the measured environmental data for each of the nine tows during DEEPEND cruise DP09 (R/V Point Sur cruise PS23-22, https://doi.org/10.7284/910034), collected between 2023-05-02 and 2023-05-12. Also included is a summary spreadsheet, an explanation of the binning of the depth intervals for the various trawls, a copy of the ship's logbook for the cruise, and a copy of the notes for each tow. The biological data, CTD, and underway data collected during this cruise are available in GRIIDC datasets NO.x959.000:0011, NO.x959.000:0009 (https://doi.org/10.7266/J7BWR482), and NO.x959.000:0016 (https://doi.org/10.7266/m39kxewk), respectively. This dataset is a result of research funded by the National Oceanic and Atmospheric Administration's RESTORE Science Program (ROR - https://ror.org/0042xzm63) under award #NA19NOS4510193 to Nova Southeastern University.

Suggested Citation:

Cook, April, Tracey Sutton, Gray Lawson, and Matthew Johnston. 2024. Multiple Opening Closing Net Environmental Sensing System [MOCNESS] instrument data for R/V Point Sur PS23-22 (Cruise DP09) in-situ deep seawater and associated fauna, from 2022-05-02 to 2023-05-12, Gulf of Mexico. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/JKEQE8B4

Purpose:

To assess environmental data associated with the biological samples collected in the 10-meter Multiple Opening Closing Net and Environmental Sensing System (MOCNESS).

Data Parameters and Units:

.PRO files: time - elapsed time [s], pres - pressure [decibars], echo [N/A], temp - temperature [degrees Celsius], theta - potential temperature [degrees Celsius], sal - salinity [percentage], sigmawater - water density (calculated from depth, temp, and salinity - [kg/m^3]), angle - net angle [degrees], flow [m/s], hzvel - horizontal velocity [m/s], vtvel - vertical velocity [m/s], vol - volume filtered [m^3], net [N/A], fluor [N/A], ptran [N/A], oxygen [N/A], Irradcurrent [N/A], Irradiance [N/A] , lat [N/A], lon [N/A]. Zero values indicate variable not measured. Data are organized into folders named by trawl number. Trawl summary data file: TrawlNo - trawl ID, TrawlNo_NetNo - trawl and net #, Cruise_Name_No - cruise name and number, Gear - type of gear, StationID - station ID, SolarCycle - solar cycle [day/night], NetNo - net number, SampleID - sample ID, SampleDateStart - sample date (CDT, [DDMMMYY]), StartLat - starting lat [dd], StartLon - starting lon [dd], EndLat - ending lat [dd.dddd], EndLon - ending lon [dd.dddd], TowStartTime_CDT - start time [HH:MM], TowEndTime_CDT - end time [HH:MM], ElapsedTime - trawl duration [HH:MM], MOC10FileName - unique file name, MinSampleDepth - min. depth [m], MaxSampleDepth - max depth [m], DepthCode - depth code, DepthBin - depth bin, MaxWaterColumnDepth - max water depth [m], DepthUnits - depth units, Volume_cubic_meters - volume of water [cubic m], Quant_or_Meat - trawl purpose, NetMeshSize - net mesh size, NetMeshSizeUnits - net mesh size units, SampPres - type of sample preservation, Comments .RAW files: Date [MM/DD/YYYY], Conductivity Probe #, Temperature Probe #, Pressure Probe # .TAB files: Yearday/Time, HH:MM:SS, min depth [pmin, meters], max depth [pmax, meters], average depth [pavg], min temperature [tmin, deg C], max temperature [tmax, deg C], average temperature [tavg, deg C], density [thmin, no units], density [thmax, no units], density [thavg, no units], salinity [smin, per mille], sigma [smax, per mille], sigma [savg, per mille], sigma [simin, no units], sigma [simax, no units], sigma [siavg, no units] beam attenuation [cmin, meters], beam attenuation [cmax, meters], beam attenuation [cavg, meters], fluorescence [fmin, volts], fluorescence [fmax, volts], fluorescence [favg, volts], oxygen [oxmin, ml/l], oxygen [oxmax, ml/l], oxygen [oxavg, ml/l], irradiance [irrmin, volts], irradiance, [irrmax, volts], irradiance [irravg, volts], angle [amin, degrees], angle [amax, degrees], angle [average, degrees], speed [min, knots], speed [max, knots], speed [average, knots], ascent/descent rate [min, meters/minute], ascent/descent rate [max, meters/minute], ascent/descent rate [average, meters/minute] , # observed, volume [m^3] Note: References to depth are actually measured pressure [dbar].

Methods:

Multiple Opening Closing Net Environmental Sensing System (MOCNESS) instrument data collected during trawls.

Individual Files: