Dataset: Guaymas porewater nutrients

Name: Porewater sulfate, sulfide, ammonia, phosphate, and silicate concentrations in Alvin pushcore samples from Guaymas Basin hydrothermal sediments collected on R/V Atlantis cruise AT37-06 in December 2016
Published: 2021-03-12
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.843000.1

Spatial Extent: N:27 E:-111 S:27 W:-111

Temporal Extent: 2016-12 - 2016-12

Project:

Collaborative Research: Microbial Carbon cycling and its interactions with Sulfur and Nitrogen transformations in Guaymas Basin hydrothermal sediments (Guaymas Basin Interactions)

Principal Investigator:

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

Co-Principal Investigator:

Samantha B. Joye (University of Georgia, UGA)

BCO-DMO Data Manager:

Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2021-03-12

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Porewater sulfate, sulfide, ammonia, phosphate, and silicate concentrations in Alvin pushcore samples from Guaymas Basin hydrothermal sediments collected on R/V Atlantis cruise AT37-06 in December 2016

Abstract:

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Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2021-03-12	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.843000.1	2021-03-12

Methods & Sampling

Methodology: Porewater sulfide concentrations were determined photometrically, and sulfate concentrations were determined by ion chromatography.

Sampling and Analytical Procedures: This porewater sulfate and sulfide dataset consists of results obtained at the Max-Planck-Institute for Marine Microbiology in Bremen, Germany. The experimental procedures are listed here separately by institution. The sampling site names in the data table are based on Teske et al. 2016 and Teske et al. 2021.

For analyses at the Max-Planck Institute for Marine Microbiology (Gunter Wegener), intact sediment cores were sampled using the Rhizons (Rhizosphere Research Products, Wageningen, NL) as described previously (Seeberg-Elversfeldt et al., 2005). The overlying water was removed from the cores and holes were drilled into designated sediment sampling depths. Pretreated Rhizons were injected and suction was applied with syringes for approx. 30 min. The rhizome depths are given in the sample tables. For sulfide analysis, 1 ml porewater subsamples were fixed with 0.1 ml of 0.1 M zinc acetate solution to preserve the sulfide as zinc sulfide until analysis by the methylene blue method (Cline 1969). The same fixed porewater sample was used for measuring sulfate concentrations using ion chromatography (Metrohm 930 Compact IC flex oven, Metrosep A PCC HC/4.0 preconcentration column, and Metrosep A Supp 5 Guard/4.0 chromatography column). The concentrations of ammonia, phosphate, and silicate were determined from porewater using a continuous flow nutrient analyzer (QuAAtro39; Seal Analytical) as published previously (Grasshoff et al., 2009).

Known Problems/Issues: Problems with Mexican customs and the agent used by WHOI at the time have resulted in limited availability of sampling gear and sampling vials on the ship. Transport problems during the return trip have caused sample losses among the porewater samples, which are evident in occasional gaps in porewater profiles or short profiles.

Note that the Alvin frame grabber was not turned on during dive 4862; therefore positions and depth are approximations.

Data Processing Description

BCO-DMO Processing:
- renamed columns to comply with BCO-DMO naming conventions;
- added columns for Lat, Lon, and Depth_Dive from separate file provided by data submitter.

Data Files

File
porewater_nutrients.csv (Comma Separated Values (.csv), 5.88 KB) MD5:0060fce7dc9f47f80c46a4b499db35eb Primary data file for dataset ID 843000

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1357238
NSF Division of Ocean Sciences	OCE-1357360

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
AT37-06		2016-12-09	R/V Atlantis	Andreas Teske (Chief Scientist)	data info
AT37-06_Alvin_Dives		2016-12-09	Alvin	Andreas Teske (Chief Scientist)	data info

Instruments

Continuous Flow Analyzer

Supplied Name: QuAAtro39; Seal Analytical

Supplied Description:

Instrument Type

Generic Name: Continuous Flow Analyzer

Acronym: CFA

Generic Description:

A sample is injected into a flowing carrier solution passing rapidly through small-bore tubing.

Ion Chromatograph

Supplied Name:

Supplied Description:

Metrohm 930 Compact IC flex oven, Metrosep A PCC HC/4.0 preconcentration column, and Metrosep A Supp 5 Guard/4.0 chromatography column

Instrument Type

Generic Name: Ion Chromatograph

Generic Description:

Ion chromatography is a form of liquid chromatography that measures concentrations of ionic species by separating them based on their interaction with a resin. Ionic species separate differently depending on species type and size. Ion chromatographs are able to measure concentrations of major anions, such as fluoride, chloride, nitrate, nitrite, and sulfate, as well as major cations such as lithium, sodium, ammonium, potassium, calcium, and magnesium in the parts-per-billion (ppb) range. (from http://serc.carleton.edu/microbelife/research_methods/biogeochemical/ic.html)

Push Corer

Supplied Name: Alvin pushcore

Supplied Description:

Instrument Type

Generic Name: Push Corer

Generic Description:

Capable of being performed in numerous environments, push coring is just as it sounds. Push coring is simply pushing the core barrel (often an aluminum or polycarbonate tube) into the sediment by hand. A push core is useful in that it causes very little disturbance to the more delicate upper layers of a sub-aqueous sediment.

Description obtained from: http://web.whoi.edu/coastal-group/about/how-we-work/field-methods/coring/

Sediment Porewater Sampler

Supplied Name: Rhizons

Supplied Description:

Instrument Type

Generic Name: Sediment Porewater Sampler

Generic Description:

A device that collects samples of pore water from various horizons below the seabed.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Alvin_Dive_Number	Alvin dive number	unitless	dive_id
Depth_Dive	Depth of sample collection	meters (m)	depth
Lat	Latitude of sampling location	decimal degrees North	lat
Lon	Longitude of sampling location	decimal degrees East	lon
Core_Number	Core number	unitless	core_id
Depth	Core depth	centimeters (cm)	depth_core
Ammonia	Ammonia	micromoles per liter (umol/L)	NH3
Nitrite	Nitrite	micromoles per liter (umol/L)	NO2
Nitrate_Nitrite	Nitrate+Nitrite	micromoles per liter (umol/L)	NO3_NO2
Nitrate	Nitrate	micromoles per liter (umol/L)	NO3
Phosphate	Phosphate	micromoles per liter (umol/L)	PO43-
Silicate	Silicate	micromoles per liter (umol/L)	Silicate

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Database

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Dataset: Guaymas porewater nutrients