Dataset: Discrete Underway

Name: Discrete underway 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:83.4964592 E:-154.7345952 S:71.0864598 W:-175.9580253

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

Discrete underway 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: Discrete Underway Data
Discrete underway seawater samples that were analyzed onboard during the HLY 2012 cruise

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

Methods & Sampling

Discrete Surface Samples

Discrete water samples were collected while underway following protocols outlined in Dickson and others (2007). Surface water samples were collected for measurement of pH, total alkalinity(TA)/total carbon, nutrients (NH4, silica, PO4, and NO2+N), stable carbon and oxygen isotopic composition, elemental analysis, dissolved organic carbon (DOC) and particulate organic carbon (POC). Water samples were removed from the sampling port of the vessel's flow-through seawater system in the main laboratory. More than 525 pH and TA discrete samples were measured underway. Samples of pH and TA samples were collected hourly analyzed. The rest of the suite of samples was typically taken every 2 h. Particulate organic carbon samples were collected twice daily. The results of the land-based analyses of total alkalinity/total carbon, nutrients (NH4, silica, PO4, and NO2+N), stable carbon and oxygen isotopic composition, elemental analysis, DOC, and POC, as well as profile data, will be reported when analyses are completed.

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

Data Processing Description

Discrete Surface Samples

The QA/QC process looked for internal consistencies in the data by calculating the results using CO2SYS and back checking with the collected data.

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_Discrete_Underway.csv" contributed by Lisa Robbins
- Parameter names edited to conform to BCO-DMO naming convention found at Choosing Parameter Name
- Date reformatted from MM/DD/YYYY to YYYYMMDD
- Time reformatted from HH:MM to HHMM

Data Files

File
Discrete_Underway.csv (Comma Separated Values (.csv), 40.51 KB) MD5:0ac9bb2d1b4ff63bd3f02811278c72a5 Primary data file for dataset ID 527879

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

Pump - Surface Underway Ship Intake

Supplied Name: pump-ship intake

Supplied Description:

Water samples were removed from the sampling port of the vessel's flow-through seawater system in the main laboratory.

Instrument Type

Generic Name: Pump - Surface Underway Ship Intake

Acronym: Pump-Ship Intake

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/31/

Generic Description:

The 'Pump-underway ship intake' system indicates that samples are from the ship's clean water intake pump. This is essentially a surface water sample from a source of uncontaminated near-surface (commonly 3 to 7 m) seawater that can be pumped continuously to shipboard laboratories on research vessels. There is typically a temperature sensor near the intake (known as the hull temperature) to provide measurements that are as close as possible to the ambient water temperature. The flow from the supply is typically directed through continuously logged sensors such as a thermosalinograph and a fluorometer. Water samples are often collected from the underway supply that may also be referred to as the non-toxic supply. Ideally the data contributor has specified the depth in the ship's hull at which the pump is mounted.

Sea-Bird SBE 45 MicroTSG Thermosalinograph

Supplied Name: SBE 45 MicroTSG

Supplied Description:

Salt content in Practical Salinity Units measured using the USCGC Healy's SBE45 instrument

Instrument Type

Generic Name: Sea-Bird SBE 45 MicroTSG Thermosalinograph

Acronym: SBE 45 MicroTSG

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0190/

Generic Description:

A small externally powered, high-accuracy instrument, designed for shipboard determination of sea surface (pumped-water) conductivity and temperature. It is constructed of plastic and titanium to ensure long life with minimum maintenance. It may optionally be interfaced to an external SBE 38 hull temperature sensor.

Sea Bird SBE 45 MicroTSG (Thermosalinograph)

Sea-Bird SBE-3 Temperature Sensor

Supplied Name: SBE-3 Temperature

Supplied Description:

Seawater Surface Temperature degrees Celsius measured using the USCGC Healy's SBE3 remote temperature probe. This value is the sea surface temperature

Instrument Type

Generic Name: Sea-Bird SBE-3 Temperature Sensor

Acronym: SBE-3 Temperature

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/134/

Generic Description:

The SBE-3 is a slow response, frequency output temperature sensor manufactured by Sea-Bird Electronics, Inc. (Bellevue, Washington, USA). It has an initial accuracy of +/- 0.001 degrees Celsius with a stability of +/- 0.002 degrees Celsius per year and measures seawater temperature in the range of -5.0 to +35 degrees Celsius. more information from Sea-Bird Electronics

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Date	Date in Coordinated Universal Time (UTC); NIST	YYYYMMDD	date
Latitude	Latitude (South is negative); WGS 84	decimal degrees	lat
Longitude	Longitude (West is negative); WGS 84	decimal degrees	lon
pH	pH at 25C (total scale)	total scale	pH
Salinity	Salt content in Practical Salinity Units measured using the USCGC Healy's SBE45 instrument	PSU	sal_ss
Sample_ID	Sample identification number.	dimensionless	sample
SST	Seawater Surface Temperature degrees Celsius measured using the USCGC Healy's SBE3 remote temperature probe. This value is the sea surface temperature	Degs Celsius	SST
Total_Alkalinity	Total alkalinity of seawater in micromoles per liter.	micromoles/liter	TALK
Time	Time in Coordinated Universal Time (UTC); NIST	HHMM	time

Database

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Dataset: Discrete Underway