Dataset: Vent fluid chemistry: AT26-10 and AT26-23

Name: Vent fluid chemistry from R/V Atlantis AT26-10 and AT26-23 in the East Pacific Rise, Pacific Ocean from 2013-2014 (Microbial Communities at Deep-Sea Vents project)
Published: 2017-01-13
Keywords: oceans

Cite This Dataset

Spatial Extent: N:9.8387 E:-104.2912 S:9.8387 W:-104.2912

Project:

An Integrated Study of Energy Metabolism, Carbon Fixation, and Colonization Mechanisms in Chemosynthetic Microbial Communities at Deep-Sea Vents (Microbial Communities at Deep-Sea Vents)

Program:

Dimensions of Biodiversity (Dimensions of Biodiversity)

Center for Dark Energy Biosphere Investigations (C-DEBI)

Principal Investigator:

Jeffrey S. Seewald (Woods Hole Oceanographic Institution, WHOI)

Co-Principal Investigator:

Stefan M. Sievert (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2017-01-13

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Vent fluid chemistry from R/V Atlantis AT26-10 and AT26-23 in the East Pacific Rise, Pacific Ocean from 2013-2014 (Microbial Communities at Deep-Sea Vents project)

Abstract:

This dataset is the chemical composition of hydrothermal fluids collected during research cruises AT26-10 and AT26-23 at the 9ºN deep-sea hydrothermal vent field on the East Pacific Rise, Pacific Ocean.

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Methods & Sampling

- All fluids were collected using isobaric gas-tight fluid samplers (Seewald et al., 2002).
- Temperature was measured during sample collection using a type-J thermocouple attached to the inlet snorkel. Reported values are maximums observed during sample collection.

Analytical methods:
pH: Ag/AgCl combination reference electrode
Na+, K+, Ca2+, Mg2+, Cl-, Br-, SO42- : ion chromatography with suppressed conductivity detectionCH4: gas chromatography with flame ionization detection
H2: gas chromatography with thermal conductivity detection

Data Processing Description

BCO-DMO Processing:
- Added conventional header with dataset name, PI name, version date
- Modified parameter names to conform with BCO-DMO naming conventions
- Replaced blanks (missing data) and 'nd' to indicate 'no data'
- Added cruise_id column

Data Files

File
vent_fluid_chemistry.csv (Comma Separated Values (.csv), 3.50 KB) MD5:8ffa300d3051a6d117d063ba875d3f9d Primary data file for dataset ID 674781

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1136727

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
AT26-10		2013-12-29	R/V Atlantis	Stefan M. Sievert (Chief Scientist)	data info
AT26-23	EPR 2014 2014B	2014-11-02	R/V Atlantis	Stefan M. Sievert (Chief Scientist)	data info
AT26-23_Alvin_Dives		2014-11-02	Alvin		data info

Instruments

Isobaric Gas-Tight Sampler

Supplied Name:

Supplied Description:

Used for sample collection

Instrument Type

Generic Name: Isobaric Gas-Tight Sampler

Acronym: IGT Sampler

Generic Description:

Isobaric Gas Tight (IGT) samplers, designed and built by scientists and engineers at WHOI, are titanium instruments designed to be used with deep submergence vehicles to sample corrosive hydrothermal vent fluids at high temperature and high pressure. The IGT prevents the sampled fluid from degassing as pressure decreases during the vehicle’s ascent to the surface.

ROV Jason

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: ROV Jason

Generic Description:

The Remotely Operated Vehicle (ROV) Jason is operated by the Deep Submergence Laboratory (DSL) at Woods Hole Oceanographic Institution (WHOI). WHOI engineers and scientists designed and built the ROV Jason to give scientists access to the seafloor that didn't require them leaving the deck of the ship. Jason is a two-body ROV system. A 10-kilometer (6-mile) fiber-optic cable delivers electrical power and commands from the ship through Medea and down to Jason, which then returns data and live video imagery. Medea serves as a shock absorber, buffering Jason from the movements of the ship, while providing lighting and a bird’s eye view of the ROV during seafloor operations. During each dive (deployment of the ROV), Jason pilots and scientists work from a control room on the ship to monitor Jason’s instruments and video while maneuvering the vehicle and optionally performing a variety of sampling activities. Jason is equipped with sonar imagers, water samplers, video and still cameras, and lighting gear. Jason’s manipulator arms collect samples of rock, sediment, or marine life and place them in the vehicle’s basket or on "elevator" platforms that float heavier loads to the surface. More information is available from the operator site at URL.

Water Temperature Sensor

Supplied Name: type-J thermocouple attached to the inlet snorkel

Supplied Description:

Used to measure in-situ temperature.

Instrument Type

Generic Name: Water Temperature Sensor

Acronym: Water Temp Sensor

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/134/

Generic Description:

General term for an instrument that measures the temperature of the water with which it is in contact (thermometer).

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
cruise_id	Cruise identifier	unitless	cruise_id
lat	Latitude; north is positive	degrees	lat
lon	Longitude; east is positive	degrees	lon
sample	Sample identifier	unitless	sample
vent_site	Vent site name	unitless	site
temp	Temperature	degrees Celsius	temp
pH_25C	pH at 25 degrees C	unitless	pH
Na_mmol_kg	Sodium concentration	millimoles/kilogram (mmol/kg)	Na
K_mmol_kg	Potassium concentration	millimoles/kilogram (mmol/kg)	K
Mg_mmol_kg	Magnesium concentration	millimoles/kilogram (mmol/kg)	Mg
Ca_mmol_kg	Calcium concentration	millimoles/kilogram (mmol/kg)	Ca
Cl_mmol_kg	Chloride concentration	millimoles/kilogram (mmol/kg)	chloride
SO4_mmol_kg	Sulfate concentration	millimoles/kilogram (mmol/kg)	SO4
Br_mmol_kg	Bromide concentration	millimoles/kilogram (mmol/kg)	bromides
H2S_mmol_L	Hydrogen sulfide concentration	millimoles/kilogram (mmol/kg)	sulfide
H2_umol_L	Hydrogen gas concentration	micromoles/kilogram (umol/kg)	no_bcodmo_term
CH4_umol_L	Methane concentration	micromoles/kilogram (umol/kg)	CH4

Status message

Database

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Dataset: Vent fluid chemistry: AT26-10 and AT26-23