Dataset Available Remotely Hosted

Salinity and temperature measurements from an oceanographic glider deployed in the northeastern Gulf of Mexico, cruise DP02, August 2015

Authors: Chuanmin Hu, Chad Lembke
Published On: Feb 27 2017 16:41 UTC
DOI: https://doi.org/10.7266/N7VM49MP
UDI: R4.x257.230:0005
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Project Information

Funded By:
Gulf of Mexico Research Initiative

Funding Cycle:
RFP-IV

Research Group:
Deep-Pelagic Nekton Dynamics of the Gulf of Mexico (DEEPEND)

Point of Contact

Chuanmin Hu
University of South Florida / College of Marine Science
huc@usf.edu

Data Collection Period

2015-08-09 to 2015-08-22

Theme keywords

salinity, temperature, glider, CTD

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Abstract:

A Slocum Glider was deployed within the DEEPEND study area near the time of the DEEPEND cruise DP02 in August 2015. As the glider traverses its transit path, it makes measurements at various depths from ~2m to almost 1000m. The measurements include conductivity, temperature, depth, chlorophyll, dissolved O2, and light field measurements. While the glider is deployed at sea, it surfaces and communicates to an onshore control station at predetermined intervals. A decimated selection of vehicle and science measurement is transmitted during these surface transmissions, and the relevant data becomes available through a USF web site. After the glider’s recovery at the end of the deployment, the complete measurement suite is downloaded from the vehicle and processed, and also becomes available through the USF site as well as a national data archive. The data available during and after the deployment can help correlate the regional NRL hydrographic model and the satellite imagery to in situ measurements of subsurface water characteristics. The Slocum glider data for the DP02 deployment can be found at the Integrated Ocean Observing System (IOOS) glider data website, https://data.ioos.us/gliders/erddap/tabledap/Murphy-20150809T1355Z.html (Dataset ID: Murphy-20150809T1355Z, USF) The glider was deployed from the RV Point Sur on August 9, 2015 at ~12:45 UTC, at approx. 27°N, 89°W. Its initial transit was to the North (to ~ 28°N, 88.5°W). The glider operated at up to 200m depth until 2300 on 10 Aug., when the dive profiles were changed to 400m. The programmed path brought it to the Loop Current. Encountering the increased speed of the Loop Current waters, it was transported to the North, then East, before being advected to the South. The glider was programmed to cross the Loop Current and exit it to the East. Strong density stratification and communication problems resulted in the glider remaining within the Loop Current’s influence and it was unable to clear the current until far to the South of the planned survey area. It was recovered on 22 August, near 25.5°N, 86.5°W.

Suggested Citation:

Chuanmin Hu, Chad Lembke. 2017. Salinity and temperature measurements from an oceanographic glider deployed in the northeastern Gulf of Mexico, cruise DP02, August 2015. Distributed by: Gulf of Mexico Research Initiative Information and Data Cooperative (GRIIDC), Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7VM49MP

Publications:

Androulidakis, Y., Kourafalou, V., Le Hénaff, M., Kang, H., Sutton, T., Chen, S., … Ntaganou, N. (2019). Offshore spreading of Mississippi waters: pathways and vertical structure under eddy influence. Journal of Geophysical Research: Oceans. doi:10.1029/2018jc014661

Purpose:

The data available during and after the deployment can help correlate the regional NRL hydrographic model and the satellite imagery to in situ measurements of subsurface water characteristics.

Data Parameters and Units:

latitude, degrees north longitude, degrees east sea water velocity, m/s Pressure, dBar depth, meters temperature, °C conductivity, S/meter salinity, practical salinity units density, kg/m^3 time