Dataset: CliOMZ Nutrient profile data
Deployment: AT50-10

View Data: For data, See Dataset Metadata Page: https://osprey.bco-dmo.org/dataset/948503

Principal Investigator:

Alyson E. Santoro (University of California-Santa Barbara, UCSB)

Scientist:

Barbara Bayer (University of Vienna)

Contact:

Barbara Bayer (University of Vienna)

Data Manager:

Sawyer Newman (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

Collaborative Research: Underexplored Connections between Nitrogen and Trace Metal Cycling in Oxygen Minimum Zones Mediated by Metalloenzyme Inventories (CliOMZ)

Version:

Deployment Synonyms:

CliOMZ

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Description

Methods & Sampling

Dataset acquisition description

Water samples were collected during cruises RR2104 and AT50-10 in the eastern tropical and subtropical Pacific Ocean. Discrete water samples were obtained using a CTD rosette sampler equipped with 24 x 10 L Niskin bottles. Different depths were sampled ranging from 10 meters to 2200 meters.

Ammonium concentrations were measured on board from unfiltered 40 mL seawater samples using the o-phthaldialdehyde derivatization method with modifications as suggested in (Taylor et al. 2007) on an Aquafluor 8000 handheld fluorometer. Samples for nitrite and nitrate concentration measurements were syringe-filtered (0.22 µm, Sterivex) and stored at −20°C before concentrations were determined by Cd reduction coupled to colorimetric detection via the Griess assay on a Lachat autoanalyzer.

Data Processing Description

Dataset Processing Description

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1924512	NSF Division of Ocean Sciences

Instruments

Flow Injection Analyzer

Supplied Name: QuikChem 8500 Series 2 Flow Injection System (Lachat Instruments)

Supplied Description:

Samples for nitrite and nitrate concentration measurements were syringe-filtered (0.22 µm, Sterivex) and stored at −20°C before concentrations were determined by Cd reduction coupled to colorimetric detection via the Griess assay on a Lachat autoanalyzer.

Instrument Type

Generic Name: Flow Injection Analyzer

Acronym: FIA

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB36/

Generic Description:

An instrument that performs flow injection analysis. Flow injection analysis (FIA) is an approach to chemical analysis that is accomplished by injecting a plug of sample into a flowing carrier stream. FIA is an automated method in which a sample is injected into a continuous flow of a carrier solution that mixes with other continuously flowing solutions before reaching a detector. Precision is dramatically increased when FIA is used instead of manual injections and as a result very specific FIA systems have been developed for a wide array of analytical techniques.

Fluorometer

Supplied Name: Aquafluor 8000 (Turner Designs)

Supplied Description:

Instrument Type

Generic Name: Fluorometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/113/

Generic Description:

A fluorometer or fluorimeter is a device used to measure parameters of fluorescence: its intensity and wavelength distribution of emission spectrum after excitation by a certain spectrum of light. The instrument is designed to measure the amount of stimulated electromagnetic radiation produced by pulses of electromagnetic radiation emitted into a water sample or in situ.

Niskin bottle

Supplied Name: 24x10 L Niskin Bottles

Supplied Description:

Discrete water samples were collected using a rosette sampler equipped with 24×10 L Niskin bottles.

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.

Parameters

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Database

Contribute Data

Dataset: CliOMZ Nutrient profile data
Deployment: AT50-10

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: CliOMZ Nutrient profile dataDeployment: AT50-10

Dataset acquisition description

Dataset Processing Description

Dataset: CliOMZ Nutrient profile data
Deployment: AT50-10