Dataset: Nutrients_Chlorophyll_Ross_Sea

Name: Nutrients and chlorophyll from sea water samples collected in the Ross Sea from 2013-2015 (Ross Sea Microb Ecophys project)
Published: 2015-12-14
Keywords: oceans

Cite This Dataset

Spatial Extent: N:77.8365 E:166.4143 S:74.6445 W:164.8316

Project:

Synergistic Effects of Iron, Carbon Dioxide and Temperature on the Fate of Nitrate: Implications for Future Changes in Export Production in the Southern Ocean (Ross_Sea_Microb_Ecophys)

Principal Investigator:

Deborah A. Bronk (Virginia Institute of Marine Science, VIMS)

Rachel E. Sipler (Virginia Institute of Marine Science, VIMS)

Co-Principal Investigator:

Andrew E. Allen (J. Craig Venter Institute, JCVI)

David A. Hutchins (University of Southern California, USC-WIES)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

2015-12-14

Version Date:

2015-12-14

Validated:

Yes

Current State:

Final no updates expected

Nutrients and chlorophyll from sea water samples collected in the Ross Sea from 2013-2015 (Ross Sea Microb Ecophys project)

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Description

Water was pumped to the surface using a trace metal clean diaphragm pump and acid cleaned teflon tubing and dispensed into trace metal clean (TMC) 50 L carboys. Sampling occurred between 18:00 and 19:00 in open air, with wind coming strictly from over open water, NNE to NE. The carboys were protected from light with dark plastic bags and returned to the Crary Laboratory at McMurdo Station via helicopter within one hour of sampling.

Chl a was measured using 90% acetone extracts and the non-acidified fluorometric method, employing a Turner Designs fluorometer and Whatman GF/F filters.

Nitrate (NO₃^-), nitrite (NO₂^-), phosphate (PO₄^3-) and silicate (SiO₄) concentrations were measured in duplicate on a Lachat QuikChem 8500 autoanalyzer. Ammonium (NH₄⁺) concentrations were measured in triplicate using the phenol-hypochlorite method.

Methods & Sampling

Chl a was measured using 90% acetone extracts and the non-acidified fluorometric method, employing a Turner Designs fluorometer and Whatman GF/F filters.

Nitrate (NO3-), nitrite (NO2-), phosphate (PO43-) and silicate (SiO4) concentrations were measured in triplicate on a Lachat QuikChem 8500 autoanalyzer. Ammonium (NH4+) concentrations were measured in triplicate using the phenol-hypochlorite method.

Data Processing Description

BCO-DMO Processing:

- added conventional header with dataset name, PI name, version date
- renamed parameters to BCO-DMO standard
- changed date format from m/d/yyyy to yyyy-mm-dd
- converted latitude and longitude from degree-decimal minutes to decimal degrees

Data Files

File
nuts_McMurdo.csv (Comma Separated Values (.csv), 735 bytes) MD5:b5fe8c9b7cbd6cf3fce0033c533faf74 Primary data file for dataset ID 628244

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Office of Polar Programs (formerly NSF PLR)	PLR-1043748

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
helicopter_Allen		2013-01-16	McMurdo Station	Andrew E. Allen (Principal Investigator)	data info

Instruments

Fluorometer

Supplied Name:

Supplied Description:

Turner Designs fluorometer

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.

Nutrient Autoanalyzer

Supplied Name:

Supplied Description:

Lachat QuikChem 8500 autoanalyzer

Instrument Type

Generic Name: Nutrient Autoanalyzer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB04/

Generic Description:

Nutrient Autoanalyzer is a generic term used when specific type, make and model were not specified. In general, a Nutrient Autoanalyzer is an automated flow-thru system for doing nutrient analysis (nitrate, ammonium, orthophosphate, and silicate) on seawater samples.

Pump

Supplied Name:

Supplied Description:

Trace metal clean diaphragm pump

Instrument Type

Generic Name: Pump

Generic Description:

A pump is a device that moves fluids (liquids or gases), or sometimes slurries, by mechanical action. Pumps can be classified into three major groups according to the method they use to move the fluid: direct lift, displacement, and gravity pumps

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
lat	latitude; north is positive	decimal degrees	lat
lon	longitude; east is positive	decimal degrees	lon
date_local	local date	yyyy-mm-dd	date
depth	sample depth	meters	depth
chl_a	mean chlorophyll-a concentration	ug/liter	chl_a
chl_a_stdev	mean chlorophyll-a concentration error	ug/liter	std_dev
NH4	mean ammonium concentration	umol N/liter	NH4
NH4_stdev	mean ammonium concentration standard deviation	umol N/liter	std_dev
NO3	mean nitrate concentration	umol N/liter	NO3
NO3_stdev	mean nitrate concentration standard deviation	umol N/liter	std_dev
NO2	mean nitrite concentration	umol N/liter	NO2
NO2_stdev	mean nitrite concentration standard deviation	umol N/liter	std_dev
Urea	mean urea concentration	umol N/liter	Urea
Urea_stdev	mean urea concentration standard deviation	umol N/liter	std_dev
PO4	mean phosphate concentration	umol P/liter	PO4
PO4_stdev	mean phosphate concentration standard deviation	umol P/liter	std_dev
SiO4	mean silicate concentration	umol Si/liter	SiO4
SiO4_stdev	mean silicate concentration standard deviation	umol Si/liter	std_dev

Status message

Database

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Dataset: Nutrients_Chlorophyll_Ross_Sea