Underway data from cruise R/V Endeavor EN531 in the Blake Ridge, Cape Fear Diapir from Aug. 2013 (SEEPC project)

Website: https://www.bco-dmo.org/dataset/537062
Version: 2014-08-15

» Connectivity in western Atlantic seep populations: Oceanographic and life-history processes underlying genetic structure (SEEPC)
He, RuoyingNorth Carolina State University - Marine, Earth and Atmospheric Sciences (NCSU MEAS)Chief Scientist
Young, Craig M.University of OregonCo-Chief Scientist
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/Endeavor cruise EN531.

Start: Depart Morehead City, NC 08/15/2013
End:  Arrive Morehead City, NC 08/18/2013

Further information on the instruments is available at: http://www.rvdata.us/catalog/EN531

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Data Files

(Comma Separated Values (.csv), 1.43 MB)
Primary data file for dataset ID 537062

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datedate (UTC) yyyy-mm-dd
monthmonth 1:12
dayday of month 1:31
yearyear YYYY
yrday_gmtGMT day and decimal time; as 326.5 for the 326th day of the year or November 22 at 1200 hours (noon) unitless
ISO_DateTime_UTCDate/Time (UTC) ISO formatted YYYY-MM-DDTHH:MM:SS[.xx]Z
timetime of day (UTC) HH:MM:SS
latLatitude; south is negative decimal degrees
lonLongitude; west is negative decimal degrees
temp_airAir temperature degrees Celsius
humidityRelative humidity percent
press_barBarometric pressure millibars
sst_5mSea surface temperature at 5 meters degrees Celsius
sst_1mSea surface temperature at 1 meter degrees Celsius
radiation_l_2Longwave radiation Watts/m^2
radiation_s_2IMET shortwave radiation Watts/m^2
precip_curr_hrPrecipitation accumulation mm
precip_last24Precipitation accumulation last 24 hours mm
precip_ratePrecipitation rate mm/hr
wind_speed_r_pwind speed raw; from port knots
wind_dir_r_pwind direction raw; from port degrees
wind_speed_c_pwind speed corrected; from port knots
wind_dir_c_pwind direction corrected; from port degrees
wind_speed_r_swind speed raw; from starboard knots
wind_dir_r_swind direction raw; from starboard degrees
wind_speed_c_swind speed corrected; from starboard knots
wind_dir_c_swind direction corrected; from starboard degrees
head1heading degrees
sogGPS speed over ground knots
flvoltfluorometer from Turner inst. volts
sal_sbe21salinity from SBE21 PSU
temp_ss_tsalsea surface temperature used in salinity calculation degrees Celsius
temp_sssea surface temperature degrees Celsius
cond_sssea surface conductivity Siemans/meter
sal_sssea surface salinity PSU

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Dataset-specific Instrument Name
Generic Instrument Name
Global Positioning System Receiver
Dataset-specific Description
Trimble differential GPS
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
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
Generic Instrument Name
Generic Instrument Description
Compass with a motorized gyroscope that tracks true north (heading).

Dataset-specific Instrument Name
SeaBird SBE-21
Generic Instrument Name
Sea-Bird SeaCAT Thermosalinograph SBE 21
Generic Instrument Description
A platinum-electrode conductivity sensor and a thermistor mounted in a corrosion-resistant plastic and titanium housing designed to be continuously plumbed into a vessel's pumped seawater supply. The instrument may be interfaced to a remote SBE 38 temperature sensor mounted either on the hull or in the seawater inlet. Data are both stored in internal memory and output to a serial port for external logging.  Conductivity is measured in the range 0-7 S/m with an accuracy of 0.001 S/m and a resolution  of 0.0001 S/m. Housing temperature is measured in the range -5-35C with an accuracy of 0.01 C and a resolution  of 0.001 C. Remote temperature is measured in the range -5-35C  with an accuracy of 0.001 C and a resolution  of 0.0003 C. More information at http://www.seabird.com/products/spec_sheets/21data.htm.

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R/V Endeavor
Start Date
End Date
SEEPC project cruise. Cruise information and original data are available from the NSF R2R data catalog.

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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 SourceAward
NSF Division of Ocean Sciences (NSF OCE)

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