Underway data from R/V Atlantis AT26-15 in the Gulf of Mexico from May 2014 (SEEPC project)

Website: https://www.bco-dmo.org/dataset/518399
Version: 2014-07-08

Project
» Connectivity in western Atlantic seep populations: Oceanographic and life-history processes underlying genetic structure (SEEPC)
ContributorsAffiliationRole
Van Dover, CindyDuke University (Duke - Bio)Chief Scientist
Ball, BernardDuke University (Duke - Bio)Contact
Copley, NancyWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager


Dataset Description

This alongtrack data set contains information on environmental conditions for each day of the RV/Atlantis cruise AT26-15.

Start: Depart Gulfport, MS 05/21/2014
End:  Arrive St. Petersburg, FL 06/14/2014

Further information on the instruments is available at: http://dlacruisedata.whoi.edu/AT/AT026L15/underway/doc


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Parameters

ParameterDescriptionUnits
dateDate (utc) mm/dd/yyyy
timeTime (utc) HH:MM:SS
yrday_gmtGMT day and decimal time; as 326.5 for the 326th day of the year or November 22 at 1200 hours (noon). unitless
latLatitude; south is negative decimal degrees
lonLongitude; west is negative decimal degrees
speed Speed through the water knots
headShip's heading degrees true
cogGPS course over ground degrees
sogGPS speed over ground knots
temp_air_pAir temperature from port side using WXT520 degrees C
temp_air_sAir temperature from starboard side using WXT520 degrees C
press_bar_pBarometric pressure from port side using WXT520 unitless
press_bar_sBarometric pressure from starboard side using WXT520 unitless
rain_intensity_pRain intensity from port side using WXT520 mm/h
rain_intensity_sRain intensity from starboard side using WXT520 mm/h
rain_accum_pRain accumulation from port side using WXT520 mm
rain_accum_sRain accumulation from starboard side using WXT520 mm
wind_dir_r_pRelative wind direction from port side using WXT520 degrees
wind_dir_r_sRelative wind direction from starboard side using WXT520 degrees
wind_speed_r_pRelative wind speed from port side using WXT520 m/sec
wind_speed_r_sRelative wind speed from starboard side using WXT520 m/sec
humidity_pRelative humidity from port side using WXT520 percent
humidity_sRelative humidity from starboard side using WXT520 percent
wind_speed_c_pTrue wind speed from port side m/s
wind_speed_c_sTrue wind speed from starboard side m/s
wind_dir_c_pTrue wind direction from port side deg
wind_dir_c_sTrue wind direction from starboard side deg
radiation_sIMET shortwave radiation watts/square meter
radiation_lLongwave radiation watts/square meter
parPhotosyntheticly Active Radiation; not collected uE/cm^2/sec
sal_ssSea surface salinity psu
temp_ssSea surface temperature degrees C
flvoltFluorescence milliVolts
sound_velSound velocity meters/second
ISO_DateTime_UTCDate/Time (UTC) ISO formatted yyyy-mm-ddTHH:MM:SS[.xx]Z


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Instruments

Dataset-specific Instrument Name
GPS
Generic Instrument Name
Global Positioning System Receiver
Dataset-specific Description
Starboard Vaisala
Generic Instrument Description
The Global Positioning System (GPS) is a U.S. space-based radionavigation system that provides reliable positioning, navigation, and timing services to civilian users on a continuous worldwide basis. The U.S. Air Force develops, maintains, and operates the space and control segments of the NAVSTAR GPS transmitter system. Ships use a variety of receivers (e.g. Trimble and Ashtech) to interpret the GPS signal and determine accurate latitude and longitude.

Dataset-specific Instrument Name
MicroTSG
Generic Instrument Name
MicroTSG Thermosalinograph
Dataset-specific Description
SBE-45
Generic Instrument Description
An externally powered, high-accuracy instrument, designed for shipboard determination of sea surface (pumped-water) conductivity and temperature. Salinity and sound velocity can also be computed.

Dataset-specific Instrument Name
WXT520
Generic Instrument Name
Weather Transmitter
Generic Instrument Description
The ship-mounted Vaisala Weather Transmitter WXT520 measures: Wind speed and direction; Liquid precipitation: rainfall, duration, intensity; Barometric pressure; Air temperature and Relative humidity. (for more information see http://www.vaisala.com/en/products/multiweathersensors/Pages/WXT520.aspx)

Dataset-specific Instrument Name
SBE48
Generic Instrument Name
Sea-Bird SBE 48 Hull Temperature Sensor
Generic Instrument Description
The SBE 48 is a high-accuracy temperature recorder with non-volatile memory, designed for shipboard determination of sea surface temperature. Installed with magnets just below the water line, the SBE 48's temperature sensor is in contact with the inside of the ship's hull. For more information, see the SBE48 Manual.


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Deployments

AT26-15

Website
Platform
R/V Atlantis
Start Date
2014-05-21
End Date
2014-06-14
Description
Start: Depart Gulfport, MS 05/21/2014 End:  Arrive St. Petersburg, FL 06/14/2014 The AT26-15 cruise was conducted as part of the project "Connectivity in western Atlantic seep populations: Oceanographic and life-history processes underlying genetic structure" (SeepC) funded by NSF OCE-1031050. The cruise included coordinated deployments of DSV Alvin and AUV Sentry. Science objectives (from the WHOI Cruise Planning Synopsis): The primary objective of the SeepC Project is to advance our general knowledge of connectivity in the deep sea using taxa found at seeps as model systems. The focus is on species and processes occurring in the Intra-American Sea (including the Caribbean, Gulf of Mexico, and eastern seaboard of the US), with attention to oceanographic circulation, life histories, and genetics. Our efforts include improving the oceanographic model for the IAS near the seabed using current data from moorings at several depths and locations and coupling this model to a Lagrangian larval transport model. We stress the importance of iterative interactions among the science teams to advance our understanding of connectivity in the deep sea through descriptive and hypothesis-driven research. We will develop effective and best methods for hypothesis testing under the constraints of working in a relatively inaccessible environment and will build capacity in understanding connectivity in deep-sea systems.


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Project Information

Connectivity in western Atlantic seep populations: Oceanographic and life-history processes underlying genetic structure (SEEPC)

Coverage: Western Atlantic, Gulf of Mexico, Intra-American Sea


This project will evaluate connectivity on spatial scales that match those at which vent systems are being studied (3500 km), with a set of nested seeps (within the Barbados system) within which connectivity can be explored at more local spatial scales (30 to 130 km), and with species that span depth (600 m to 3600 m) and geographic ranges (30 km to 3500 km) and that have diverse life-history characteristics.  Five deep-sea seep systems in the Intra- American Sea (IAS) are targeted: Blake Ridge, Florida Escarpment, Alaminos Canyon, Brine Pool, Barbados (El Pilar, Orenoque A, Orenoque B). The primary objective is to advance our general knowledge of connectivity in the deep sea. The focus is on species and processes occurring in the IAS, with attention to oceanographic circulation, life histories, and genetics. Questions that apply in shallow-water systems motivate this study:

1. What phylogeographic breaks occur in the system? It is important to distinguish between phylogeographic history and connectivity. A phylogeographic break with no shared alleles between populations implies a long history of isolation or possibly cryptic speciation.

2. Are populations connected by ongoing migration? This is the fundamental question about connectivity and the scale of genetic variation in marine species with planktonic larvae.

3. What biophysical processes underlie observed connectivities? Biological processes (e.g., larval distributions in the water column, timing of reproduction, and planktonic larval duration) and physical processes of transport and dispersion interact to determine connectivity.

The oceanographic model for the IAS will be improved and coupled to a Lagrangian larval transport model. The field program includes time-series sampling of larvae at seeps with records of current velocities, water column sampling to determine larval distribution potential, shipboard studies of larval biology and behavior, and sampling of benthic target species. Phylogenetic and population genetic tools will be used to explore historical and contemporary gene flow. Iterative interactions among the science teams will advance our understanding of connectivity in the deep sea and to develop effective and best methods for hypothesis testing under the constraints of working in a relatively inaccessible environment. Since their discovery, deep-sea chemosynthetic ecosystems have been novel systems within which to test the generality of paradigms developed for shallow-water species. This study will explore scale-dependent biodiversity and recruitment dynamics in deep-sea seep communities, and will identify key factors underlying population persistence and maintenance of biodiversity in these patchy systems.

Google Earth map showing positions of stations, CTD, XBT, multibeam locations (KMZ file dlownload)



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Funding

Funding SourceAward
NSF Division of Ocean Sciences (NSF OCE)

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