Dataset: Porewater Nutrients
Deployment: IODP-385

Sediment porewater nutrients

Principal Investigator:

Virginia P. Edgcomb (Woods Hole Oceanographic Institution, WHOI)

Contact:

Andreas Teske (University of North Carolina at Chapel Hill, UNC-Chapel Hill)

BCO-DMO Data Manager:

Karen Soenen (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

Collaborative Research: IODP-enabled Insights into Fungi and Their Metabolic Interactions with Other Microorganisms in Deep Subsurface Hydrothermal Sediments (IODP insights Fungi)

Version:

Data URL:

https://www.bco-dmo.org/dataset-deployment/869493/data

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Description

Methods & Sampling

Dataset acquisition description

Sediments samples dedicated to nutrient analyses recovered from 8 drilling sites from up to 427 meter below seafloor. Two ~40ml samples of sediment were placed in 50 ml Falcon tubes and were centrifuged at 3000 rpm for 15 minutes to separate porewater from the sediment. The porewater was collected into vials for dissolved inorganic carbon (DIC), dissolved organic carbon (DOC), NOx, and total nitrogen (TN). Samples were stored at 4oC.

Data Processing Description

Dataset Processing Description

Colorimetric determinations of ammonium, nitrate, were performed using a OI Analytical Flow Solutions IV auto analyzer. Total nitrogen and carbon (weight %) are measured with a Costech 1040 CHNOS Elemental Combustion system. Filtered porewater samples were analyzed for dissolved organic carbon (DOC) and total dissolved nitrogen (TDN) using a Shimadzu TOC/TN analyzer. Dissolved organic nitrogen (DON) was calculated by subtracting TDN from the sum of the inorganic nitrogen species.

All nutrient analyses were performed at Wetland Biogeochemistry Analytical Services, LSU, LA.

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-2048489	NSF Division of Ocean Sciences

Instruments

Nutrient Autoanalyzer

Supplied Name: Costech 1040 CHNOS Elemental Combustion system

Supplied Description:

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.

Total Nitrogen Analyzer

Supplied Name: Shimadzu TOC/TN analyzer

Supplied Description:

Instrument Type

Generic Name: Total Nitrogen Analyzer

Acronym: TN analyzer

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

Generic Description:

A unit that accurately determines the nitrogen concentrations of organic compounds typically by detecting and measuring its combustion product (NO). See description document at: http://bcodata.whoi.edu/LaurentianGreatLakes_Chemistry/totalnit.pdf

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Sample_ID	Sample ID	unitless	sample
Depth	Sample depth	meters (m)	depth
Latitude	Latitude of sampling location, south is negative	decimal degrees	lat
Longitude	Longitude of sampling location, west is negative	decimal degrees	lon
ISO_DateTime_UTC	Date and time of sampling in ISO format (UTC timezone)	unitless	ISO_DateTime_UTC
Temperature	Temperature	degrees Celsius (°C)	temp
Dissolved_Organic_Carbon	measurement of Dissolved Organic Carbon	mg/L	DOC
Dissolved_Inorganic_Carbon	measurement of Dissolved Inorganic Carbon	mg/L	DIC
Total_Nitrogen	measurement of Total Nitrogen	mg/L	N
NO2_NO_as_N_um	measurement of nitrate and nitrite a nitrogen	uM	NO3_NO2
NO2_NO_as_N	measurement of nitrate and nitrite a nitrogen	mg/L -N	NO3_NO2
Notes	description	units	comment

Database

Contribute Data

Dataset: Porewater Nutrients
Deployment: IODP-385

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Porewater NutrientsDeployment: IODP-385

Dataset acquisition description

Dataset Processing Description

Dataset: Porewater Nutrients
Deployment: IODP-385