Dataset: DOC TDN Nutrients
Deployment: NBP1302

TRACERS: DOC, TDN, Nutrients

Principal Investigator:

Dennis Hansell (University of Miami Rosenstiel School of Marine and Atmospheric Science, UM-RSMAS)

Contact:

Sarah Bercovici (University of Miami Rosenstiel School of Marine and Atmospheric Science, UM-RSMAS)

Dennis Hansell (University of Miami Rosenstiel School of Marine and Atmospheric Science, UM-RSMAS)

BCO-DMO Data Manager:

Stephen R. Gegg (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

TRacing the fate of Algal Carbon Export in the Ross Sea (TRACERS)

Current State:

Final no updates expected

Version:

30 November 2015

Deployment Synonyms:

TRACERS 2013

Version Date:

2015-09-30

Data URL:

https://www.bco-dmo.org/dataset-deployment/614700/data

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Description

This dataset includes water column concentrations of DOC, TDN, and nutrients collected from February 13, 2013 to March 18, 2013 along the Ross Sea shelf. Sampling focus was in the western Ross Sea along with a zonal section on 76° 30ˈS.

Related files and references:
Physical data from NBP 1302 are archived by the Marine Geoscience Data System. Data held there include shipboard continuous underway (e.g., thermosalinograph and fluorescence), bathymetry, CTD, meteorological, XBT, and navigation. The project link: http://www.marine-geo.org/tools/search/entry.php?id=NBP1302

DOC methodology
Dickson, A.G., Sabine, C.L., Christian, J.R. (Eds.) Guide to best practices for ocean CO₂ measurements. PICES Special Publication 3, 191.

Phosphate methodology
K Grasshoff. 1976. Methods of seawater analysis. Verlga Chemie, Weinheim

Silicate methodology
J.D.H Strickland and T.R. Parsons. 1968. A Practical Handbook of Seawater Analyses. Ottawa: Fisheries Research Board of Canada, Bulletin.

Nitrate methodology
Braman, R.S. and S.A. Hendrix. 1989. Nanogram nitrite and nitrate determination in biological materials by vanadium(III) reduction with chemiluminescence detection. Anal. Chem. 61 (24). 2715-2718.

Methods & Sampling

Dataset acquisition description

Sampling and Analytical Methodology
DOC: Samples were run through an inline GF/F 0.7 uM filter by gravity filtration directly from the Niskin bottles and stored frozen in polycarbonate bottles until shore-based analyses. DOC concentrations determined by high temperature catalytic oxidation (TOC-VCPN analyzer, Shimadzu) according to Dickson et al. (2007). Hansell Deep Reference Water was used as an external standard.
Standard deviation: 1.5 µM

Phosphate: Samples were stored in HDPE bottles at 4oC until analysis (within one week of sampling). Phosphate was determined colorimetrically according to Grasshoff (1976) using a fiber optic spectrophotometer (Ocean Optics) onboard RV NBP. Potassium phosphate monobasic (KH₂PO₄) was used as a standard.
Standard deviation of reference water: 0.04 µM PO₄

Silicic Acid: Samples were stored in HDPE bottles at 4oC until analysis (within one week of sampling). Silicic acid was determined colorimetrically according to Strickland and Parsons (1968) using a spectrophotometer onboard RV NBP and standardized with sodium fluorosilicate Na₂SiF₆ in artificial seawater (Salinity=28 ppt).
Standard deviation of reference water: 1.44 µM Si/p>

Nitrate (Note: NO₃ refers to NO₂+NO₃): Samples were stored frozen (for up to 6 months) prior to analysis in a shore-based laboratory. Sample NO₃ was reduced to NO using a heated, acidic V (III) solution and determined by chemiluminescent detection of NO. [Braman and Hendrix 1989]. Potassium nitrate (KNO₃) was used as a standard.
Standard deviation for replicate analyses/sample: 0.2 µM NO₃

Data Processing Description

Dataset Processing Description

Data Processing:
Data converted from micromol/L to micromol/kg

Quality flag descriptions:
2: QC was performed; considered good data
7: QC was performed; considered bad / questionable data
5: Value is missing

BCO-DMO Processing Notes
- Generated from original file "TRACERS_DOC_TDN_NUTS_Hansell2.xls" contributed by Sarah Bercovici
- Parameter names edited to conform to BCO-DMO naming convention found at Choosing Parameter Name
- Date formatted to YYYYMMDD

More information about this dataset deployment

Funding

Award Number	Funding Source
PLR-1142117	NSF Division of Polar Programs

Instruments

Chemiluminescence NOx Analyzer

Supplied Name: chemiluminescent detector

Supplied Description:

Sample NO3 was reduced to NO using a heated, acidic V (III) solution and determined by chemiluminescent detection of NO. [Braman and Hendrix 1989]

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 Sea-Bird SBE 911plus

Supplied Name: Sea-Bird 911+ CTD

Supplied Description:

Sea-Bird 911+ CTD

Instrument Type

Generic Name: CTD Sea-Bird SBE 911plus

Acronym: CTD SBE 911plus

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0058/

Generic Description:

The Sea-Bird SBE 911 plus is a type of CTD instrument package for continuous measurement of conductivity, temperature and pressure. The SBE 911 plus includes the SBE 9plus Underwater Unit and the SBE 11plus Deck Unit (for real-time readout using conductive wire) for deployment from a vessel. The combination of the SBE 9 plus and SBE 11 plus is called a SBE 911 plus. The SBE 9 plus uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 plus and SBE 4). The SBE 9 plus CTD can be configured with up to eight auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorescence, light (PAR), light transmission, etc.). more information from Sea-Bird Electronics

Niskin bottle

Supplied Name: Niskin Bottle

Supplied Description:

Niskin Bottle

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.

Shimadzu TOC-V Analyzer

Supplied Name: TOC-VCPN analyzer, Shimadzu

Supplied Description:

DOC concentrations determined by high temperature catalytic oxidation (TOC-VCPN analyzer, Shimadzu)

Instrument Type

Generic Name: Shimadzu TOC-V Analyzer

Acronym: Shimadzu TOC-V

Community Identifier: http://onto.nerc.ac.uk/CAST/124

Generic Description:

A Shimadzu TOC-V Analyzer measures DOC by high temperature combustion method.

Spectrophotometer

Supplied Name: fiber optic spectrophotometer (Ocean Optics)

Supplied Description:

Phosphate was determined colorimetrically according to Grasshoff (1976) using a fiber optic spectrophotometer (Ocean Optics)

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
STATION	Station Number	dimensionless	station
BOTTLE	Bottle Number	dimensionless	bottle
DATE	Station Date	YYYYMMDD	date
LATITUDE	Latitude (South is negative)	decimal degrees	lat
LONGITUDE	Longitude (West is negative)	decimal degrees	lon
DEPTH	Depth	meters	depth
SALINITY_CTD	Salinty	PSU	sal
TEMP_CTD	Temperature	Degrees C	temp
DOC	DOC	micromol/kg	DOC
DOC_FLAG	DOC_FLAG Quality flag descriptions: 2: QC was performed; considered good data 7: QC was performed; considered bad / questionable data 5: Value is missing	dimensionless	q_flag
TDN	TDN	micromol/kg	TDN
TDN_FLAG	TDN_FLAG Quality flag descriptions: 2: QC was performed; considered good data 7: QC was performed; considered bad / questionable data 5: Value is missing	dimensionless	q_flag
PHOSPHATE	PHOSPHATE	micromol/kg	PO4
PHOSPHATE_FLAG	PHOSPHATE_FLAG Quality flag descriptions: 2: QC was performed; considered good data 7: QC was performed; considered bad / questionable data 5: Value is missing	dimensionless	q_flag
SILICATE	SILICATE	micromol/kg	SiO4
SILICATE_FLAG	SILICATE_FLAG Quality flag descriptions: 2: QC was performed; considered good data 7: QC was performed; considered bad / questionable data 5: Value is missing	dimensionless	q_flag
NITRATE	NITRATE	micromol/kg	NO3
NITRATE_FLAG	NITRATE_FLAG Quality flag descriptions: 2: QC was performed; considered good data 7: QC was performed; considered bad / questionable data 5: Value is missing	dimensionless	q_flag

Database

Contribute Data

Dataset: DOC TDN Nutrients
Deployment: NBP1302

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: DOC TDN NutrientsDeployment: NBP1302

Dataset acquisition description

Dataset Processing Description

Dataset: DOC TDN Nutrients
Deployment: NBP1302