Dataset: Hydrocarbons in porewater
Deployment: AT42-05

Guaymas pushcore porewater hydrocarbons

View Data: For data, See Dataset Metadata Page: https://osprey.bco-dmo.org/dataset/773288

Principal Investigator:

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

Co-Principal Investigator:

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

BCO-DMO Data Manager:

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

Project:

Collaborative Research: Hydrothermal Fungi in the Guaymas Basin Hydrocarbon Ecosystem (HOTFUN)

Version:

Coordinated Deployments:

AT42-05_Alvin_Dives

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Description

This dataset includes porewater hydrocarbon concentrations from samples collected using Alvin pushcores at Guaymas Basin hydrothermal vents, RV/Atlantis cruise AT42-05, Nov. 2018.

Methods & Sampling

Dataset acquisition description

Alvin pushcores dedicated to hydrocarbon analyses were sectioned to recover the 0-6cm, 6-12, and 12-18cm fractions, or the 0-10, 10-20, and 20-30cm fractions. 7 ml of sediment from each horizon was sampled for methane analysis. The samples were collected at 10 ml serum vials and treated with 2.8 ml of NaOH 1M. The serum vials were sealed with black stoppers and stored inverted at -20 degrees C. The remaining sediment from each horizon (~40ml of sample) was aliquoted into two 50 ml Falcon tubes and was centrifuged at 3000 rpm for 15 minutes to separate porewater from the sediment. After centrifugation, the porewater was filtered through sterile syringe cellulose 0.45micron filters. 20 ml of the porewater was collected into 20 ml serum vials for saturated hydrocarbons, polycyclic aromatic hydrocarbons (PAH) and alkane analysis and stored at 4 degrees C. The sediment cake from each horizon was kept and stored at 4 degrees C for hydrocarbons, polycyclic aromatic hydrocarbons (PAH) and alkane analysis.

All hydrocarbon analyses were performed at Alpha Analytical Labs, Mansfield MA.

Data Processing Description

Dataset Processing Description

BCO-DMO Processing Notes:
- added conventional header with dataset name, PI name, version date
- modified parameter names to conform with BCO-DMO naming conventions and match porewater nutrients dataset
- added columns for EPA_method and sample_type
- moved header columns to separate dataset "hydrocarbon_sample_log"
- removed blank rows

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1829903	NSF Division of Ocean Sciences

Instruments

Gas Chromatograph

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: Gas Chromatograph

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB02/

Generic Description:

Instrument separating gases, volatile substances, or substances dissolved in a volatile solvent by transporting an inert gas through a column packed with a sorbent to a detector for assay. (from SeaDataNet, BODC)

Mass Spectrometer

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: Mass Spectrometer

Acronym: Mass Spec

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB16/

Generic Description:

General term for instruments used to measure the mass-to-charge ratio of ions; generally used to find the composition of a sample by generating a mass spectrum representing the masses of sample components.

Push Corer

Supplied Name:

Supplied Description:

Used to collect sediment samples

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/

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
EPA_method	Methods used for the analysis; from EPS publication	unitless	brief_desc
sample_type	type of sample: pore water or sediment	unitless	sample_type
units	units for the concentrations of each	unitless	no_bcodmo_term
hydrocarbon	name of organic compound	unitless	no_bcodmo_term
core7_0_6cm	concentration of hydrocarbon in sample 'Core 7 0-6cm'	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core7_6_12cm	concentration of hydrocarbon in sample 'Core 7 6-12cm'	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core7_12_18cm	concentration of hydrocarbon in sample 'Core 7 12-18cm'	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core35_10_10cm	concentration of hydrocarbon in sample 'Core 35 10-10cm'	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core35_10_20cm	concentration of hydrocarbon in sample 'Core 35 10-20cm'	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core35_20_30cm	concentration of hydrocarbon in sample 'Core 35 20-30cm'	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core41_0_10cm	concentration of hydrocarbon in sample 'Core 41 0-10cm'	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core41_10_20cm	concentration of hydrocarbon in sample 'Core 41 10-20cm'	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core41_20_30cm	concentration of hydrocarbon in sample 'Core 41 20-30cm'	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core24_0_10cm	concentration of hydrocarbon in sample 'Core 24 0-10cm'	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core24_0_20cm	concentration of hydrocarbon in sample 'Core 24 0-20cm'	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core5_10_7cm	concentration of hydrocarbon in sample 'Core 5 10-7cm'	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core5_17_14cm	concentration of hydrocarbon in sample 'Core 5 17-14cm'	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core5_14_21cm	concentration of hydrocarbon in sample 'Core 5 14-21cm'	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core15_0_7cm	concentration of hydrocarbon in sample 'Core 15 0-7cm'	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core15_7_14cm	concentration of hydrocarbon in sample 'Core 15 7-14cm'	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core15_14_21cm	concentration of hydrocarbon in sample 'Core 15 14-21cm'	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core20_0_10cm	concentration of hydrocarbon in sample 'Core 20 0-10cm'	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core20_10_20cm	concentration of hydrocarbon in sample 'Core 20 10-20cm'	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core20_20_30cm	concentration of hydrocarbon in sample 'Core 20 20-30cm'	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core8_0_7cm_A	concentration of hydrocarbon in sample 'Core 8 0-7cm' from dive 4999	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core8_7_14cm_A	concentration of hydrocarbon in sample 'Core 8 7-14cm' from dive 4999	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core8_14_21cm_A	concentration of hydrocarbon in sample 'Core 8 14-21cm' from dive 4999	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core8_0_7cm_B	concentration of hydrocarbon in sample 'Core 8 0-7cm' from dive 5000	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core8_7_14cm_B	concentration of hydrocarbon in sample 'Core 8 7-14cm'	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons
core8_14_21cm_B	concentration of hydrocarbon in sample 'Core 8 14-21cm'	nanograms/liter (ng/l) or milligrams/liter (mg/l)	hydrocarbons

Database

Contribute Data

Dataset: Hydrocarbons in porewater
Deployment: AT42-05

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Hydrocarbons in porewaterDeployment: AT42-05

Dataset acquisition description

Dataset Processing Description

Dataset: Hydrocarbons in porewater
Deployment: AT42-05