Dataset: CTD - Nutrients Profiles

Name: CTD nutrient profile data from USCGC Healy cruise HLY1202 from the Arctic, North of Alaska in 2012 (OA - Canada Basin project)
Published: 2014-09-09
Keywords: oceans

Cite This Dataset

Spatial Extent: N:83.31367 E:-157.768 S:74.2673 W:-163.29833

Project:

Ocean Acidification in the Canada Basin: Roles of Sea Ice (OA - Canada Basin)

Program:

Science, Engineering and Education for Sustainability NSF-Wide Investment (SEES): Ocean Acidification (formerly CRI-OA) (SEES-OA)

Principal Investigator:

Dr Bogdan Onac (University of South Florida, USF)

Dr Jonathan Wynn (University of South Florida, USF)

Co-Principal Investigator:

Dr Lisa Robbins (United States Geological Survey, USGS)

Contact:

Dr Lisa Robbins (United States Geological Survey, USGS)

BCO-DMO Data Manager:

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

Version:

09 September 2014

Version Date:

2014-09-09

Current State:

Preliminary and in progress

CTD nutrient profile data from USCGC Healy cruise HLY1202 from the Arctic, North of Alaska in 2012 (OA - Canada Basin project)

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Description

USGS Arctic Ocean Carbon Cruise 2012: Nutrients Data
Nutrient data from the HLY 1202 cruise

For aditional information see:
HLY1202 Cruise Report, Appendix E
U.S. Geological Survey Data Series 862 - Methods

Methods & Sampling

Samples were numbered incrementally throughout the duration cruises. A "surface" prefix indicates a sample taken from the ship's flow-through system. A two-number code indicates a sample taken from a rosette sampler at a vertical profile station and consists of the station number followed by the bottle number (e.g. 3.5 indicates station 3, bottle 5.)

For aditional information see:
HLY1202 Cruise Report, Appendix E
U.S. Geological Survey Data Series 862 - Methods

Data Processing Description

A syringe that was pre-rinsed with sample water was used to collect approximately 60 mL of seawater. A Sterivex filter cartridge (pore size 0.22 micrometer, ¼m) was attached to the Luer-Lock fitting of the syringe and was rinsed with approximately 40 mL of sample. The remaining 20 mL of sample was then collected in a 20-mL glass scintillation vial and frozen. Samples were analyzed for NH4, silica, PO4, and NO2+N at the Woods Hole Oceanographic Institution (WHOI) Nutrient Analytical Facility.

For aditional information see:
HLY1202 Cruise Report, Appendix E
U.S. Geological Survey Data Series 862 - Methods

BCO-DMO Processing Notes
- Generated from original file: "HLY1202_Nutrients_Profile.csv" contributed by Lisa Robbins
- Parameter names edited to conform to BCO-DMO naming convention found at Choosing Parameter Name
- Station 'Name, Data and Time' inserted from CTD Stations for consistency with other data sets
- Single Date/Time field split into separate Date and Time fields
- Date reformatted from MM/DD/YYYY to YYYYMMDD
- Time reformatted from HH:MM to HHMM

Data Files

File
CTD_Nutrients_Profile.csv (Comma Separated Values (.csv), 2.51 KB) MD5:f773ac427b3d455ceea0aec2f8fe13ec Primary data file for dataset ID 527355

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Arctic Sciences	PLR-1220032

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
HLY1202		2012-08-26	USCGC Healy	Dr Larry A. Mayer (Chief Scientist) Dr Andrew A. Armstrong (Co-Chief Scientist)	data info

Instruments

CTD Sea-Bird SBE 911plus

Supplied Name: CTD SBE 911plus

Supplied Description:

Discrete samples from vertical profile casts were collected at 4 locations. A 24-bottle Niskin rosette (12-L bottle volume) with an electronic trigger was fitted with a Sea-Bird SBE 911plus CTD and altimeter.

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 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.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Sample_ID	Sample identification number. Duplicate samples identified by additional letter qualifier.	text	sample
Name	Station name and number	text	station
Date	Date in Coordinated Universal Time (UTC); NIST	YYYYMMDD	date
Time	Time in Coordinated Universal Time (UTC); NIST	HHMM	time
Latitude	Latitude (South is negative); WGS 84	decimal degrees	lat
Longitude	Longitude (West is negative); WGS 84	decimal degrees	lon
Depth	Depth in meters at which sample was taken. Zero (0) indicates surface sample.	meters	depth
NH4	Concentration of ammonium (NH4) in micromoles	uM	NH4
Silicate	Concentration of silicate (SiO2) in micromoles	uM	Silicate
PO4	Concentration of phosphate (PO4) in micromoles	uM	PO4
NO2_plus_NO3	Concentration of nitrogen (NO2 + NO3) in micromoles	uM	NO3_NO2

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Database

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Dataset: CTD - Nutrients Profiles