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 help characterize the environment and assess the orientation and speed of the MOCNESS. The flow and net angle can be used to calculate the volume of water filtered for each net. Data were collected during DP07 (R/V Point Sur PS21-13, cruise doi https://doi.org/10.7284/909100) 2021-04-25 - 2021-05-06. The biological, CTD, and ship data collected during this cruise are available in GRIIDC datasets NO.x959.000:0012 (underway ADCP, https://doi.org/10.7266/8DPG0DRY), NO.x959.000:0004 (CTD, https://doi.org/10.7266/717AC8SA), and NO.x959.000:0005 (fauna inventory, https://doi.org/10.7266/941JKZCZ). 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, Matthew Johnston. 2023. Multiple Opening Closing Net Environmental Sensing System (MOCNESS) instrument data for Cruise DP07 (R/V Point Sur PS21-13) in-situ deep seawater and associated fauna in the Gulf of Mexico from 2021-04-25 to 2021-05-06. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/ZYHTVRHY

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: EntryNum - record ID, TrawlNo - trawl ID, TrawlNo_NetNo - trawl and net #, CruiseName - cruise name, CruiseNo - cruise #, Gear - type of gear, StationID - station ID, SolarCycle - solar cycle [day/night], NetNo - net number, SampleID - sample ID, SampleDate - sample date [DDMMMYY], StartLat - starting lat [dd], StartLon - starting lon [dd], EndLat - ending lat [dd], EndLon - ending lon [dd], TowStartTime_CDT - start time [HH:MM], TowEndTime_CDT - end time [HH:MM], ElapsedTime - trawl duration [HH:MM], MOC10FileName - unique file name, MinDepth - min. depth [m], MaxDepth - max depth [m], DepthRange - depth range [m], DepthCode - depth code, DepthBin - depth bin, MaxWaterDepth - max water depth [m], MaxDeployDepth - max deployment depth [m], DepthUnits - depth units, Volume - volume of water [cubic m], VolUnits - volume units, Quant_or_Meat - trawl purpose, NetMeshSize - net mesh size, NetMeshSizeUnits - net mesh size units, SampPres - type of sample preservation, Start_Water_Depth - water column depth at start of trawl [m], End_Water_Depth - water column depth at end of trawl [m], 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, no units], salinity [smax, no units], salinity [savg, no units], 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: