Dataset: TN391 Sentry Dive Summary

Name: Summary of AUV Sentry dives that occurred during R/V Thomas G. Thompson cruise TN391 (Woods Hole, Massachusetts to Gulfport, Mississippi) in May and June 2021
Published: 2023-04-17
Keywords: sentry, larval collection, SyPRID, oceans

View Data: Data not available yet

Cite This Dataset

Spatial Extent: N:39.04834 E:-73.8202 S:26.02124 W:-91.5051

Temporal Extent: 2021-05-26 - 2021-06-17

Project:

Collaborative Research: dispersal depth and the transport of deep-sea, methane-seep larvae around a biogeographic barrier (SALT)

Principal Investigator:

Shawn M. Arellano (Western Washington University - Shannon Point Marine Center, SPMC)

David B. Eggleston (North Carolina State University - Center for Marine Science and Technology, NCSU CMAST)

Craig M. Young (University of Oregon, OIMB)

Co-Principal Investigator:

Ruoying He (North Carolina State University - Marine, Earth and Atmospheric Sciences, NCSU MEAS)

BCO-DMO Data Manager:

Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2023-04-17

Restricted:

Current State:

Data not available

Summary of AUV Sentry dives that occurred during R/V Thomas G. Thompson cruise TN391 (Woods Hole, Massachusetts to Gulfport, Mississippi) in May and June 2021

Abstract:

This dataset is a summary of AUV Sentry dives that occurred during R/V Thomas G. Thompson cruise TN391 (Woods Hole, Massachusetts to Gulfport, Mississippi) in May and June 2021. This cruise was number three in a series of four cruises from the project titled "Collaborative Research: dispersal depth and the transport of deep-sea, methane-seep larvae around a biogeographic barrier", also called "SALT" for short.

Expand/Collapse All

Methods & Sampling

ROV Jason dives were coordinated with AUV Sentry Dives utilizing the SyPRID plankton sampler. Dives were conducted during R/V Thomas G. Thompson cruise TN391 (Woods Hole, Massachusetts to Gulfport, Mississippi) in May and June 2021.

Data Processing Description

BCO-DMO Processing:
- converted date-time fields to ISO 8601 format;
- renamed fields to comply with BCO-DMO naming conventions.

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1851286
NSF Division of Ocean Sciences	OCE-1851383
NSF Division of Ocean Sciences	OCE-1851421

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
TN391	SALT summer 2021 cruise	2021-05-25	R/V Thomas G. Thompson	Craig M. Young (Chief Scientist)	data info

Instruments

AUV Sentry

Supplied Name:

Supplied Description:

AUV Sentry with SyPRID attached

Instrument Type

Generic Name: AUV Sentry

Generic Description:

The autonomous underwater vehicle (AUV) Sentry is a fully autonomous underwater vehicle capable of exploring the ocean down to 6,000 meters (19,685 feet) depth. Sentry builds on the success of its predecessor the ABE, with improved speed, range, and maneuverability.

Sentry's hydrodynamic shape also allows faster ascents and descents. Sentry carries a superior science sensor suite and an increased science payload enabling it to be used for both mid-water and near-seabed oceanographic investigations. Sentry produces bathymetric, sidescan, subbottom, and magnetic maps of the seafloor and is capable of taking digital bottom photographs in a variety of deep-sea terrains such as mid-ocean ridges, deep-sea vents, and cold seeps at ocean margins. Sentry is uniquely able to operate in extreme terrain, including volcano caldera and scarps. Sentry's navigation system uses a doppler velocity log and inertial navigation system, aided by acoustic navigation systems (USBL or LBL). The USBL system also provides acoustic communications, which can be used to obtain the vehicle state and sensor status as well as to retask the vehicle while on the bottom. In addition its standard sensors, Sentry has carried a variety of science-supplied sensors, including the Nakamura redox potential probe, ACFR 3-D imaging system, and the Tethys in-situ mass spectrometer.

Sentry can be used to locate and quantify hydrothermal fluxes. Sentry is also capable of a much wider range of oceanographic applications due to its superior sensing suite, increased speed and endurance, improved navigation, and acoustic communications. Sentry can be used as a stand alone vehicle or in tandem with Alvin or an ROV to increase the efficiency of deep-submergence investigations.

More information is available from the operator site at URL: http://www.whoi.edu/main/sentry

Sentry Precision Robotic Impeller Driven Sampler

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: Sentry Precision Robotic Impeller Driven Sampler

Acronym: SyPRID Sampler

Generic Description:

The SyPRID (Sentry Precision Robotic Impeller Driven) sampler is an innovative deep-rated (6000 m) plankton sampler that partners with the Sentry Autonomous Underwater Vehicle (AUV) to obtain paired, large-volume plankton samples at specified depths and survey lines to within 1.5 m of the seabed and with simultaneous collection of sensor data.

SyPRID uses a perforated Ultra-High-Molecular-Weight (UHMW) plastic tube to support a fine mesh net within an outer carbon composite tube (tube-within-a-tube design), with an axial flow pump located aft of the capture filter. The pump facilitates flow through the system and minimizes the bow wave at the mouth opening. The cod end, a hollow truncated cone, is also made of UHMW plastic and is designed to 'soften' the landing of zooplankton on the capture surface. SyPRID attaches as a saddle-pack to the Sentry vehicle.

Sentry itself is configured with a flight control system that enables autonomous survey paths to altitudes as low as 1.5 m. In its inaugural deployment at the Blake Ridge Seep (2160 m) on the US Atlantic Margin, SyPRID was operated for 6 h at an altitude of 5 m. It recovered plankton samples from that stratum in excellent condition and with greater larval numbers than recovered in a typical 'near-bottom' MOCNESS sample from comparable habitats and depths. The prototype SyPRID and its next generations will enable studies of plankton or other particulate distributions associated with patchy habitats, localized physico-chemical strata (e.g., above and below the thermocline), or discrete water masses at an unprecedented spatial resolution for a large volume system [1].

More information is available by contacting:
Carl Kaiser
Program Manager
Applied Ocean Physics & Engineering
NDSF AUV Operations Manager
Office Phone: +1 508 289 3269
ckaiser@whoi.edu

[1] Billings, A., Kaiser, C., Young, C. M., Hiebert, L. S., Cole, E., Wagner, J. K. S., & Van Dover, C. L. (2017). SyPRID sampler: A large-volume, high-resolution, autonomous, deep-ocean precision plankton sampling system. In Deep Sea Research Part II: Topical Studies in Oceanography (Vol. 137, pp. 297–306). Elsevier BV. https://doi.org/10.1016/j.dsr2.2016.05.007

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
Dive_Number	Dive number	unitless	dive_id
Site	Site name	unitless	site
Zooka	?	unitless	no_bcodmo_term
Start_ISO_DateTime_UTC	Start date and time (UTC) of dive in ISO 8601 format Format: %Y-%m-%dT%H:%M:%SZ	unitless	ISO_DateTime_UTC
End_ISO_DateTime_UTC	End date and time (UTC) of dive in ISO 8601 format Format: %Y-%m-%dT%H:%M:%SZ	unitless	ISO_DateTime_UTC
Start_Lat	Latitude at start of Sentry deployment	degrees North	lat
Start_Lon	Longitude at start of Sentry deployment	degrees East	lon
Depth	Depth of sampling	meters (m)	depth
Duration	Duration of deployment in hours and minutes Format: %H:%M	unitless	duration
Volume_sampled	Volume sampled	liters (L)	volume
number_of_larvae	Number of larvae	individuals	count
larvae_per_liter	Number of larvae per liter	larvae per liter	abundance
number_of_morphotypes	Number of morphotypes present	unitless	count
number_of_new_morphotypes	Number of new morphotypes?	unitless	count
Preservation	Preservation method	unitless	sample_descrip
Container	Type of container	unitless	sample_descrip
number_of_containers	Number of containers	unitless	sample_descrip
Container_Packaging	Description of container packaging	unitless	sample_descrip
Storage	Description of container storage	unitless	sample_descrip
Recipient_of_Sample	Recipient of the sample (either WWU or OIMB)	unitless	sample_descrip

Database

Contribute Data

Dataset: TN391 Sentry Dive Summary