Dataset: Bottle chemistry data from AT37-12
Deployment: AT37-12

View Data: For data, See Dataset Metadata Page: https://www.bco-dmo.org/dataset/889539

Principal Investigator:

Andrew R. Babbin (Massachusetts Institute of Technology, MIT)

Co-Principal Investigator:

Ryan Woosley (Massachusetts Institute of Technology, MIT)

Student:

Timur Cinay (Massachusetts Institute of Technology, MIT)

Contact:

Andrew R. Babbin (Massachusetts Institute of Technology, MIT)

BCO-DMO Data Manager:

Taylor Heyl (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

Collaborative Research: Environmental Drivers of Chemoautotrophic Carbon Production at Deep-Sea Hydrothermal Vents - Comparative Roles of Oxygen and Nitrate (vent O2 NO3 roles)

Version:

Deployment Synonyms:

Dark Life II

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Description

Methods & Sampling

Dataset acquisition description

This dataset represents bottle chemistry (Nitrite, pH, alkalinity, and oxygen) data that were collected from discrete depths by CTD rosette during the AT37-12 cruise on R/V Atlantis in the southern part of the Eastern Tropical North Pacific (ETNP) in April–May 2017. Samples were acquired using a 24-bottle CTD rosette equipped with temperature, salinity, pressure, and oxygen sensors at 8 stations. We measured nitrite using the Griess method, Nitrate by chemiluminescence detection via vanadium reduction, pH by colorimetric determination, and Total Alkalinity by titration.

Nitrite was measured using an Ocean Optics QEPRO spectrophotometer with a 10-centimeter Starna flow-through quartz cell. Nitrate is reported as the difference from the total nitrogen oxides measured with a Teledyne T200 NOx analyzer with a custom front end for vanadium reduction and nitrite measurement. pH was measured using an Agilent 8454 spectrophotometer with a custom front end for automated syringe injection. Total Alkalinity was measured using a custom total alkalinity titrator built by the lab of Andrew Dickson at UCSD-Scripps Institute for Oceanography.

Further details in Cinay et al. 2022, Global Biogeochemical Cycles

Data Processing Description

Dataset Processing Description

BCO-DMO Processing Description:
- Converted dates to format (YYYY-MM-DD)

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1559042	NSF Division of Ocean Sciences
OCE-1559198	NSF Division of Ocean Sciences

Instruments

Automatic titrator

Supplied Name: Custom Alkalinity Titrator

Supplied Description:

Instrument Type

Generic Name: Automatic titrator

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB12/

Generic Description:

Instruments that incrementally add quantified aliquots of a reagent to a sample until the end-point of a chemical reaction is reached.

Chemiluminescence NOx Analyzer

Supplied Name: Teledyne T200 NOx analyzer

Supplied Description:

Instrument Type

Generic Name: Chemiluminescence NOx Analyzer

Generic Description:

The chemiluminescence method for gas analysis of oxides of nitrogen relies on the measurement of light produced by the gas-phase titration of nitric oxide and ozone. A chemiluminescence analyzer can measure the concentration of NO/NO2/NOX.

One example is the Teledyne Model T200: https://www.teledyne-api.com/products/nitrogen-compound-instruments/t200

CTD - profiler

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: CTD - profiler

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/130/

Generic Description:

The Conductivity, Temperature, Depth (CTD) unit is an integrated instrument package designed to measure the conductivity, temperature, and pressure (depth) of the water column. The instrument is lowered via cable through the water column. It permits scientists to observe the physical properties in real-time via a conducting cable, which is typically connected to a CTD to a deck unit and computer on a ship. The CTD is often configured with additional optional sensors including fluorometers, transmissometers and/or radiometers. It is often combined with a Rosette of water sampling bottles (e.g. Niskin, GO-FLO) for collecting discrete water samples during the cast.

This term applies to profiling CTDs. For fixed CTDs, see https://www.bco-dmo.org/instrument/869934.

Niskin bottle

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: Niskin bottle

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/

Generic Description:

A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.

Spectrophotometer

Supplied Name: Ocean Optics QEPro

Supplied Description:

Instrument Type

Generic Name: Spectrophotometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB20/

Generic Description:

An instrument used to measure the relative absorption of electromagnetic radiation of different wavelengths in the near infra-red, visible and ultraviolet wavebands by samples.

Spectrophotometer

Supplied Name: Agilent 8454

Supplied Description:

Instrument Type

Generic Name: Spectrophotometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB20/

Generic Description:

An instrument used to measure the relative absorption of electromagnetic radiation of different wavelengths in the near infra-red, visible and ultraviolet wavebands by samples.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
CRUISEID	Cruise identifier	unitless	cruise_id
STNNBR	Station identifier	unitless	station
SAMPNO	Sample identifier	unitless	sample
DATE	Date of sampling	unitless	date
LATITUDE	Latitude of sampling site North (South is negative)	decimal degrees	lat
LONGITUDE	Longitude of sampling site East (West is negative)	decimal degrees	lon
DEPTH	Depth of sampling	dbar	depth
NITRITE	Nitrite concentration	micromoles per liter (umol/L)	NO2
NITRATE	Nitrate concentration	micromoles per liter (umol/L)	NO3
PH_SWS	pH, seawater scale	unitless	pH
TA	Total alkalinity	micromoles per liter (umol/L)	TALK
SIGMA0	Potential density anomaly at sea surface	kilograms per cubic meter	sigma_theta

Database

Contribute Data

Dataset: Bottle chemistry data from AT37-12
Deployment: AT37-12

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Bottle chemistry data from AT37-12Deployment: AT37-12

Dataset acquisition description

Dataset Processing Description

Dataset: Bottle chemistry data from AT37-12
Deployment: AT37-12