Dataset: Downcore 210Pb and 137Cs data

Name: Mud Patch sediment age dating with Lead-210 and Cesium-137 from R/V Endeavor EN524 in the continental shelf off New England; 40.43 N 70.5 W from May 2013 (OA, Hypoxia and Warming project)
Published: 2016-12-16
Keywords: oceans

Cite This Dataset

Spatial Extent: N:40.4606 E:-70.4969 S:40.438 W:-70.5447

Project:

Ocean Acidification, Hypoxia and Warming: Experimental Investigations into Compounded Effects of Global Change on Benthic Foraminifera (OA, Hypoxia and Warming)

Program:

Science, Engineering and Education for Sustainability NSF-Wide Investment (SEES): Ocean Acidification (formerly CRI-OA) (SEES-OA)

Principal Investigator:

Joan M. Bernhard (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

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

Version Date:

2016-12-16

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Mud Patch sediment age dating with Lead-210 and Cesium-137 from R/V Endeavor EN524 in the continental shelf off New England; 40.43 N 70.5 W from May 2013 (OA, Hypoxia and Warming project)

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Methods & Sampling

Sediments were collected using MC800 multicorer, and sliced into selected 1-cm intervals. Aliquots were dried, ground into fine powder, and placed in glass vials. Samples were analyzed on a Canberra model GL2020RS low energy Germanium (LeGe) planar detector coupled with low background cryostats in low background shields, in Jeff Donnelly’s lab at WHOI using standard procedures.

Data 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
- reformatted date from d-Mon-yy to yyyy-mm-dd
- reduced number of significant digits of Pb and Cs due to sampling precision methods
- added yrday_utc and ISO_DateTime_UTC

Data Files

File
sediment_age.csv (Comma Separated Values (.csv), 2.70 KB) MD5:0f146a15d006eba80b92c25b20939e75 Primary data file for dataset ID 670631

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1219948

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
EN524		2013-05-19	R/V Endeavor	Joan M. Bernhard (Chief Scientist)	data info
OC326		1998-07-06	R/V Oceanus	Dr Lloyd Keigwin (Chief Scientist)	data info

Instruments

Gamma Ray Spectrometer

Supplied Name: Canberra model GL2020RS low energy Germanium (LeGe) planar detector

Supplied Description:

Samples were analyzed on a Canberra model GL2020RS low energy Germanium (LeGe) planar detector coupled with low background cryostats in low background shields, in Jeff Donnelly’s lab at WHOI using standard procedures

Instrument Type

Generic Name: Gamma Ray Spectrometer

Generic Description:

Instruments measuring the relative levels of electromagnetic radiation of different wavelengths in the gamma-ray waveband.

Multi Corer

Supplied Name: MC800 multicorer

Supplied Description:

Instrument Type

Generic Name: Multi Corer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/51/

Generic Description:

The Multi Corer is a benthic coring device used to collect multiple, simultaneous, undisturbed sediment/water samples from the seafloor. Multiple coring tubes with varying sampling capacity depending on tube dimensions are mounted in a frame designed to sample the deep ocean seafloor. For more information, see Barnett et al. (1984) in Oceanologica Acta, 7, pp. 399-408.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
sample	sample identifier	unitless	sample
cruise	cruise identifier	unitless	cruise_id
event	event number	unitless	event
lat	latitude; north is positive	decimal degrees	lat
lon	longitude; east is positive	decimal degrees	lon
date	date formatted as yyyy-mm-dd	unitless	date
time	UTC time formatted as HH:MM	unitless	time
yrday_utc	UTC day and decimal time:eg. 326.5 for the 326th day of the year or November 22 at 1200 hours (noon)	unitless	yrday_utc
ISO_DateTime_UTC	Date/Time (UTC) ISO formatted based on ISO 8601:2004(E) with format YYYY-mm-ddTHH:MM:SS[.xx]Z	unitless	ISO_DateTime_UTC
depth	sample depth	meters	depth
depth_sediment	sample depth range of with the mulitcore	centimeters	depth_core
Pb_210	Pb-210 concentration	Becquerel per gram sediment (Bq/g)	Pb210_tot
Pb210_stdev	Pb-210 concentration standard deviation	Becquerel per gram sediment (Bq/g)	Pb210_err
Pb_214	Pb-214 concentration	Becquerel per gram sediment (Bq/g)	no_bcodmo_term
Pb214_stdev	Pb-214 concentration standard deviation	Becquerel per gram sediment (Bq/g)	std_dev
Cs_137	Cs-137 concentration	Becquerel per gram sediment (Bq/g)	Cs137_tot
Cs137_stdev	Cs-137 concentration standard deviation	Becquerel per gram sediment (Bq/g)	Cs137_err

Status message

Database

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Dataset: Downcore 210Pb and 137Cs data