Dataset: Atlantic Sediment PAH

Name: Atlantic sediment polycyclic aromatic hydrocarbon (PAH) concentrations from samples collected using a multi-corer and box corer from multiple cruises throughout the Atlantic between 1994 and 2010
Published: 2023-09-14
Keywords: sediments, Atlantic Ocean, Polycyclic Aromatic Hydrocarbons, oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.908357.1

Spatial Extent: N:16.8344 E:312.5156 S:-37.6181 W:9.3844

Temporal Extent: 1994-07-26 - 2010-08-13

Project:

Concentrations and source assessment of black carbon across tropical Atlantic air and sediment (Tropical Atlantic Black Carbon)

The Black Carbon Cycle: Budget and Fluxes of Black Carbon in South Atlantic Sediments (Black Carbon Cycle)

Principal Investigator:

Rainer Lohmann (University of Rhode Island, URI)

Student:

Kari Ann St. Laurent (University of Rhode Island, URI)

BCO-DMO Data Manager:

Amber D. York (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2023-09-14

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Atlantic sediment polycyclic aromatic hydrocarbon (PAH) concentrations from samples collected using a multi-corer and box corer from multiple cruises throughout the Atlantic between 1994 and 2010

Abstract:

These data include sediment polycyclic aromatic hydrocarbon (PAH) concentrations. These data were collected on multiple cruises in throughout the Atlantic; specifically, in the Amazon Delta (EN-480; July 2010), Sierra Leone Rise (EN-481; August 2010), Niger Delta (GeoB 4901, GeoB 4903, GeoB 4904, GeoB 4905, GeoB 4907, and GeoB 4908; February/March 1998), Senegal Delta (GeoB 9501; April/May 2003), and Northwest Argentina Basin (GeoB 2814; July/August 1994). Sediments were collected using multi-corer and box corer samples and kept frozen until analysis. Polycyclic aromatic hydrocarbon concentrations were determined by gas chromatography mass spectrometry. A total of 24 PAH analytes were quantified using ChemStation software. These data help better constrain pyrogenic carbon sources and PAH accumulation rates into Atlantic sediments. These data were published in St.Laurent, et al. (2023).

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Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2023-09-14	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.908357.1	2023-10-06

Methods & Sampling

Sediment samples were collected via a 4-barrel multi-corer (R/V Endeavor) and box corer (GeoB; samples previously collected from the Department of Geosciences at Bremen University, see MARUM GeoB Core Repository https://www.marum.de/en/Infrastructure/MARUM-GeoB-Core-Repository.html). Sediments collected on the R/V Endeavor were segmented into 1-2 cm sections, dried in a drying oven (35°C) and homogenized via mortar and pestle; sediments from GeoB had previously been segmented into 1-10cm sections, freeze-dried and ground with a mortar and pestle.

Instruments:
Homogenized sediments were extracted with an accelerated solvent extractor (Dionex ASE 350) in 6 cycles at 150°C using a 50/50 mix of hexane and acetone. Prior to extraction, d10-acenapthene, d10-phenanthrene, d12-chrysene, and d12-perylene were added to each sample to assess recovery. Solvent extracts were evaporated to 1 mL using a rotary evaporator and purified through a column containing 2 mg of activated silica with 45 mL of a 30/70 solvent mixture of dichloromethane and hexane. Extracts were evaporated with N2 gas to 50 μL and an injection surrogate of p-terphenyl was added before analysis on an Agilent 6890 Series gas chromatograph coupled to a 5973 Mass Selection Detector (GC-MS).

Location:
Amazon Delta (approximately: 4 N, 47 W; 2400-3500m); Sierra Leone Rise (approximately: 7 N, 20 W; 2800-3800m), Niger Delta (approximately: 1 N, 8 E; 1200-3000m), Senegal Delta (approximately: 17 N, 17 W; 330 m), and Northwest Argentina Basin (approximately: 37 S, 39 W; 5000m)

Cruise or Deployment:R/V Endeavor (EN-480, EN-481; July/August 2010); GeoB (4901, 4903, 4904, 4905, 4907, 4908; February/March 1998), GeoB (9501; April/May 2003), GeoB (2814, July/August 1994)

* R/V Endeavor cruises were attached to this dataset as "Deployments."
* Collection information for the GeoB samples previously collected from the Department of Geosciences at Bremen University can be found in table "Atlantic Sediment Cruise Information" in the Supplemental Files section of this dataset.

Data Processing Description

24 PAH analyzes were quantified using ChemStation software.

BCO-DMO Processing

* 5 sheets named by location name in "Atlantic_Sediment_PAH.xlsx" were imported into the BCO-DMO data system.
* Individual location tables were combined into one table with an additional column "Location" to capture the site name provided by the sheet name.
* PAH values rounded to two decimal places as discussed with the submitter. There was variable formatting imported from the original excel file so two decimal place format was used.

* Column names adjusted to conform to BCO-DMO naming conventions designed to support broad re-use by a variety of research tools and scripting languages. [Only numbers, letters, and underscores. Can not start with a number]
** example: column "1,5-Dimethyl Napthalene" became "Napthalene_1_5_Dimethyl" with column description "Polycyclic aromatic hydrocarbon (PAH) 1,5-Dimethyl Napthalene"

* Date format converted to ISO 8601 format.

Data Files

File
Atlantic Sediment PAH filename: 908357_v1_atlantic_sediment_pah.csv (Comma Separated Values (.csv), 18.98 KB) MD5:7e291a0fc91202527423d77f265c42bc Primary data table for dataset 908357 version 1

Supplemental Files

File

Atlantic Sediment Cruise Information
filename: altantic_sediment_cruise_information.csv

(Comma Separated Values (.csv), 1.45 KB)
MD5:7550cf1e6430ae47a3ce9ec960ef189f

Cruise information table.  This includes a description of R/V Endeavor cruises and GeoB core samples previously collected from the Department of Geosciences at Bremen University (obtained from sediment repository (PANGAEA, https://www.pangaea.de/) see MARUM GeoB Core Re­pos­it­ory https://www.marum.de/en/Infrastructure/MARUM-GeoB-Core-Repository.html.

Cruise_ID = cruise identifier

Cruise_name_AltID = Alternate cruise name (or  GeoB  core id)

Vessel_Name = Vessel name (or if sample was from the Pangaea sediment repository)

Start_Date = cruise start date

End_Date = cruise end date

Location_Sampling_area = geolocation name of the cruise

Chief_Scientist_name = Chief scientist name

Cruise DOI = the DOI for the cruise (if available).

Datasets = Which datasets in the BCO-DMO "Related Dataset" group included samples from the cruise.  See Related Datasets section.

Comments = The date and month of the collection

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1924191
NSF Division of Ocean Sciences	OCE-0851044

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
EN480	EN-480	2010-07-13	R/V Endeavor	Rainer Lohmann (Chief Scientist)	data info
EN481	EN-481	2010-07-25	R/V Endeavor	Rainer Lohmann (Chief Scientist)	data info

Instruments

Accelerated Solvent Extractor

Supplied Name: Dionex ASE 350

Supplied Description:

Instrument Type

Generic Name: Accelerated Solvent Extractor

Acronym: ASE

Generic Description:

Accelerated solvent extraction (ASE) is a method for extracting various chemicals from a complex solid or semisolid sample matrix. The process uses high temperature and pressure, which results in the extraction taking less time and requiring less solvent, and possibly also giving better analyte recovery, than traditional methods that use less extreme conditions.

Gas Chromatograph Mass Spectrometer

Supplied Name: Agilent 6890 Series gas chromatograph coupled to a 5973 Mass Selection Detector (GC-MS)

Supplied Description:

Instrument Type

Generic Name: Gas Chromatograph Mass Spectrometer

Generic Description:

Instruments 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 by a mass spectrometer.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Location	Location name	unitless	site
Site	Numerical sediment core name (includes cruise identifier)	unitless	core_id
Average_Depth	Average sediment depth	cenitmeters below seafloor (cmbsf)	depth_bsf
Date	Core date in ISO 8601 format Format: %Y-%m-%d	unitless	date
Lat	Core sample location latitude	decimal degrees	lat
Lon	Core sample location longitude	decmial degrees	lon
Napthalene	Polycyclic aromatic hydrocarbon (PAH) Napthalene	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons
Napthalene_2_Methyl	Polycyclic aromatic hydrocarbon (PAH) 2-Methyl Napthalene	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons
Acenapthylene	Polycyclic aromatic hydrocarbon (PAH) Acenapthylene	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons
Acenapthene	Polycyclic aromatic hydrocarbon (PAH) Acenapthene	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons
Biphenyl	Polycyclic aromatic hydrocarbon (PAH) Biphenyl	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons
Napthalene_1_5_Dimethyl	Polycyclic aromatic hydrocarbon (PAH) 1,5-Dimethyl Napthalene	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons
Flourene	Polycyclic aromatic hydrocarbon (PAH) Flourene	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons
Napthalene_2_3_5_Trimethyl	Polycyclic aromatic hydrocarbon (PAH) 2,3,5-Trimethyl Napthalene	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons
Phenanthrene	Polycyclic aromatic hydrocarbon (PAH) Phenanthrene	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons
Anthracene	Polycyclic aromatic hydrocarbon (PAH) Anthracene	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons
Flourene_2_Methyl	Polycyclic aromatic hydrocarbon (PAH) 2-Methyl Flourene	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons
Dibenzothiophene	Polycyclic aromatic hydrocarbon (PAH) Dibenzothiophene	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons
Phenanthrene_1_methyl	Polycyclic aromatic hydrocarbon (PAH) 1-methyl phenanthrene	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons
Anthracene_9_Methyl	Polycyclic aromatic hydrocarbon (PAH) 9-Methyl anthracene	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons
Fluoranthene	Polycyclic aromatic hydrocarbon (PAH) fluoranthene	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons
Pyrene	Polycyclic aromatic hydrocarbon (PAH) pyrene	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons
Phenanthrene_4_5_Dimethyl	Polycyclic aromatic hydrocarbon (PAH) 4,5-Dimethyl Phenanthrene	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons
Phenanthrene_3_6_Dimethyl	Polycyclic aromatic hydrocarbon (PAH) 3,6-dimethyl Phenanthrene	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons
Pyrene_1_methyl	Polycyclic aromatic hydrocarbon (PAH) 1-methyl pyrene	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons
Retene	Polycyclic aromatic hydrocarbon (PAH) Retene	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons
Perylene	Polycyclic aromatic hydrocarbon (PAH) Perylene	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons
Perylene_Benzo_g_h_i	Polycyclic aromatic hydrocarbon (PAH) Benzo(g,h,i)perylene	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons
Pyrene_Indeno_1_2_3_c_d	Polycyclic aromatic hydrocarbon (PAH) Indeno(1,2,3-c,d)pyrene	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons
Anthracene_Dibenzo_a_h	Polycyclic aromatic hydrocarbon (PAH) Dibenzo(a,h)anthracene	nanograms polycyclic aromatic hydrocarbon per gram of sediment (ng PAH/ g Sediment)	hydrocarbons

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Dataset: Atlantic Sediment PAH