Dataset: AT42-24 Alvin Dive Summary

Name: Summary of the HOV Alvin dives that occurred on R/V Atlantis cruise AT42-24 in the Western Atlantic margin and Gulf of Mexico in February and March 2020
Published: 2023-04-12
Keywords: alvin, methane seep, Gulf of Mexico, Western Atlantic Margin, oceans

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Spatial Extent: N:38.0475 E:-73.8225 S:26.0287 W:-91.5049

Temporal Extent: 2020-02-25 - 2020-03-11

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:

2023-04-12

Restricted:

Validated:

Current State:

Data not available

Summary of the HOV Alvin dives that occurred on R/V Atlantis cruise AT42-24 in the Western Atlantic margin and Gulf of Mexico in February and March 2020

Abstract:

This dataset is a summary of the HOV Alvin dives that occurred on R/V Atlantis cruise AT42-24 in the Western Atlantic margin and Gulf of Mexico (from Woods Hole to Gulfport, Mississippi) in February and March 2020. This was the first sampling cruise of a series of four for 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.

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Data Processing Description

BCO-DMO Processing:
- renamed fields to comply with BCO-DMO naming conventions;
- changed date format to YYYY-MM-DD.

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
AT42-24	SALT Spring 2020 cruise	2020-02-24	R/V Atlantis	Craig M. Young (Chief Scientist)	data info

Instruments

HOV Alvin

Supplied Description:

Instrument Type

Generic Name: HOV Alvin

Generic Description:

Human Occupied Vehicle (HOV) Alvin is part of the National Deep Submergence Facility (NDSF). Alvin enables in-situ data collection and observation by two scientists to depths reaching 6,500 meters, during dives lasting up to ten hours.

Commissioned in 1964 as one of the world’s first deep-ocean submersibles, Alvin has remained state-of-the-art as a result of numerous overhauls and upgrades made over its lifetime. The most recent upgrades, begun in 2011 and completed in 2021, saw the installation of a new, larger personnel sphere with a more ergonomic interior; improved visibility and overlapping fields of view; longer bottoms times; new lighting and high-definition imaging systems; improved sensors, data acquisition and download speed. It also doubled the science basket payload, and improved the command-and-control system allowing greater speed, range and maneuverability.

With seven reversible thrusters, it can hover in the water, maneuver over rugged topography, or rest on the sea floor. It can collect data throughout the water column, produce a variety of maps and perform photographic surveys. Alvin also has two robotic arms that can manipulate instruments, obtain samples, and its basket can be reconfigured daily based on the needs of the upcoming dive.

Alvin's depth rating of 6,500m gives researchers in-person access to 99% of the ocean floor. Alvin is a proven and reliable platform capable of diving for up to 30 days in a row before requiring a single scheduled maintenance day. Recent collaborations with autonomous vehicles such as Sentry have proven extremely beneficial, allowing PIs to visit promising sites to collect samples and data in person within hours of their being discovered, and UNOLs driven technological advances have improved the ability for scientific outreach and collaboration via telepresence

Alvin is named for Allyn Vine, a WHOI engineer and geophysicist who helped pioneer deep submergence research and technology.

(from https://www.whoi.edu/what-we-do/explore/underwater-vehicles/hov-alvin/, accessed 2022-09-09)

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Date	Date of dive Format: %Y-%m-%d	unitless	date
Dive_Number	Dive number	unitless	dive_id
Site_Name	Site name	unitless	site
Lat	Latitude of dive	degrees North	lat
Lon	Longitude of dive	degrees East	lon
Depth	Depth of dive	meters	depth
Pilot	Alvin Pilot	unitless	person
Port_observer	Name of observer	unitless	person
Stbd_observer	Name of observer	unitless	person

Database

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Dataset: AT42-24 Alvin Dive Summary