Dataset: ETNP 2012 McClane Pump POM
Deployment: TN278

View Data: For data, See Dataset Metadata Page: https://osprey.bco-dmo.org/dataset/948746

Principal Investigator:

Richard Keil (University of Washington, UW)

Scientist:

Clara Fuchsman (University of Washington, UW)

Student:

Megan E. Duffy (University of Washington, UW)

Technician:

Jacquelyn A. Neibauer (University of Washington, UW)

BCO-DMO Data Manager:

Amber D. York (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

The role of cryptic nutrient cycling within sinking particles on trace element transport in oxygen minimum zones (OMZ Nutrient Cycling)

Version:

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Description

Methods & Sampling

Dataset acquisition description

Suspended organic carbon and nitrogen concentrations and stable isotopes were obtained on the R/V Thompson cruise TN278 at St P2 (16.53 N 107.15 W; known as BB2 on this cruise) and at St P1 (20.1 N 106.0 W; known as BB1 on this cruise) in the Eastern Tropical North Pacific Oxygen Deficient Zone in April 2012. Water was filtered onto 142 mm pre-combusted GF/F filters in situ using McClane pumps (on average ~300-500 L) in a depth profile. Two 21 mm diameter punches from a size 12 core bore punch were obtained from each 142 mm filter and used for organic matter analysis. Sample punches were wafted with HCl overnight to remove carbonate, dried at 40°C, packed into silver capsules, and sent to the UC Davis Stable Isotope Facility (Davis, CA) for C and N analysis utilizing an elemental analyzer (Elementar Vario EL Cube) attached to an isotope ratio mass spectrometer (Isoprim VisION). Blank combusted GF/F filters were included in analyses and did not show measurable material.

Data Processing Description

Dataset Processing Description

Data were processed in Microsoft Excel. In particularly, ug C and N were converted to concentrations using volume filtered.

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1636332	NSF Division of Ocean Sciences

Instruments

Elementar Vario EL Cube elemental analyzer

Supplied Name:

Supplied Description:

UC Davis Stable Isotope Facility (Davis, CA) analysed for C and N utilizing an elemental analyzer (Elementar Vario EL Cube) attached to an isotope ratio mass spectrometer (Isoprim VisION).

Instrument Type

Generic Name: Elementar Vario EL Cube elemental analyzer

Acronym: Vario EL Cube

Generic Description:

A laboratory instrument used for quantifying organic elements. It can measure C, H, N and S and optionally O, Cl and TIC. It was first developed in 2006 as a successor to the vario EL III. It uses a high-temperature combustion unit that is able to complete sample digestion at up to 1200 deg C (or 1800 deg C at the point of combustion when tin foil is used) and a jet injection of oxygen directly to the sample during combustion. Separation of gas components are performed on up to 3 gas-selective columns which trap gases until they are heated up and the prior gas peak has reached the baseline during detection. It uses a Thermal Conductivity Detector (TCD) as standard. An infrared (IR) detector for sulfur and oxygen and electrochemical detector for chlorine are optionally available. The instrument can measure C / N elemental ratios of up to 12,000:1 and provides an elemental detection limit of < 40 ppm (TCD).

Isotope-ratio Mass Spectrometer

Supplied Name: Isoprim VisION

Supplied Description:

UC Davis Stable Isotope Facility (Davis, CA) analysed for C and N utilizing an elemental analyzer (Elementar Vario EL Cube) attached to an isotope ratio mass spectrometer (Isoprim VisION).

Instrument Type

Generic Name: Isotope-ratio Mass Spectrometer

Acronym: IR Mass Spec; IRMS

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB16/

Generic Description:

The Isotope-ratio Mass Spectrometer is a particular type of mass spectrometer used to measure the relative abundance of isotopes in a given sample (e.g. VG Prism II Isotope Ratio Mass-Spectrometer).

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Sample	sample name	unitless	sample
St	station sampled	unitless	station
latitude	location sampled (latitude)	decimal degrees	lat
longitude	location sampled (longitude)	decimal degrees	lon
Date	date sampled (ISO 8601 format)	unitless	date
Depth	depth sampled	meters (m)	depth
Nitrogen	concentration of organic N. Detection limit for N is 5 ug	micromolar (uM)	N
Carbon	concentration of organic C. Detection limit for C is 30 ug.	micromolar (uM)	C
d15N_Air	isotopic composition of N (d15N with respect to reference standard air).	permil (0/00)	d15N
d13C_VPDB	isotopic composition of C (d13C). Reference standard VPDB="Vienna Pee Dee Belemnite"	permil (0/00)	d13C
C_to_N	ratio of molar carbon to nitrogen concentrations (C:N)	unitless	C_to_N

Database

Contribute Data

Dataset: ETNP 2012 McClane Pump POM
Deployment: TN278

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: ETNP 2012 McClane Pump POMDeployment: TN278

Dataset acquisition description

Dataset Processing Description

Dataset: ETNP 2012 McClane Pump POM
Deployment: TN278