Abstract:
This dataset includes the underway data collected aboard the R/V F.G. Walton Smith cruise WS17121 in the Gulf of Mexico from 2017-04-30 to 2017-05-09. Underway and CTD data were collected for 9 days in the northeastern Gulf of Mexico while deploying EM-APEX floats that were instrumented to measure physical and biogeochemical parameters. The expedition started in Gulfport, MS, spent 9 days moving along two parallel deployment lines (including a weather delay), before heading to port in Miami, FL. The Walton Smith underway system includes a Sea-Bird Electronics MicroThermoSalinoGraph (SBE 45 MicroTSG) and Sea-Bird Electronics Digital Oceanographic Thermometer (SBE 38) that measures temperature, conductivity and salinity; a Seapoint chlorophyll-a fluorometer (SCF) and Dissolved Organic Matter fluorometer (SUVF); and a Turner Designs C6 multi-sensor platform that measures chlorophyll, colored dissolved organic matter (CDOM), phycoerythrin, phycocyanin, and turbidity. This dataset includes the POSMV navigation files. CTD, meteorological and ship navigation data collected during this cruise are available under GRIIDC UDIs R5.x275.000:0004, R5.x275.000:0006, and R5.x275.000:0008. These data are part of the Rolling Deck to Repository Program (DOI:10.7284/907283).
Suggested Citation:
Shay, Lynn; Jaimes, Benjamin; Brewster, Jodi. 2018. Ship underway data collected aboard the R/V F.G. Walton Smith cruise WS17121 in the Gulf of Mexico from 2017-04-30 to 2017-05-09. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/n7-fr3b-1k20
Data Parameters and Units:
All files include the computer date (MM/DD/YY) and time (HH:MM:SS). Folder Debubbler_In_Flow: pump outflow (LPM), raw voltage. Folder Depth: Knudsen Water Depth (feet, meter, Fathom), mnemonic, checksum, DBT string. Folder DisOrgMat (Seapoint SUVF fluorometer): dissolved organic matter concentration (micrograms/L), raw voltage, gain, and flow. Folder DisOrgMat_Flow: dissolved organic matter flow (micrograms/s), raw voltage, gain. Folder Documentation: cruise information. Folder Fluorometer (Seapoint SCF fluorometer): chlorophyll-a concentration (micrograms/L), raw voltage, gain, and flow. Folder Fluorometer-Flow: chlorophyll-a flow (micrograms/s), raw voltage, gain. Folder MicroTSG and Folder SBTemp: temperature (degrees C), conductivity (Seimens), remote temperature (degrees C), salinity (PSU), raw temperature, raw conductivity, raw remote temperature, TSG flow, hex string, temperature frequency, conductivity frequency, remote temperature frequency. Folder Output_Pressure: output pressure (PSI), raw voltage. Folder POSMV: latitude (degrees/minutes), longitude (degrees/minutes), position, altitude, geoid height, horizontal dilution, satellites, mnemonic, checksum, GGA String, VTG String, HDT String. Folder Post-Strainer_Pressure: post-strainer pressure (PSI), raw voltage. Folder Pre-Strainer_Pressure: pre-strainer pressure (PSI), raw voltage. Folder Pump_Out_Flow: pump outflow (L/min), raw voltage. Folder Turner_C7: chlorophyll-a raw fluorescence units, chlorophyll-a calibrated fluorescence units (micrograms/L), CDOM raw fluorescence units, CDOM calibrated fluorescence units (ppb), turbidity raw fluorescence units, turbidity calibrated fluorescence units (NTU), no sensor installed (no data), no sensor installed (no data), phycoerythrin raw fluorescence units, phycoerythrin calibrated fluorescence units (ppb), phycocyanin raw fluorescence units, phycocyanin calibrated fluorescence units (ppb), depth (m), temperature (degrees C), instrument string.
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