Dataset: GN01 Aerosol Be-7

Name: Beryllium-7 Aerosol Concentration from USCGC Healy cruise HLY1502 in the Canada and Makarov Basins of the Arctic Ocean from August to October 2015 (US GEOTRACES Arctic)
Published: 2018-08-14
Keywords: oceans

Cite This Dataset

Spatial Extent: N:89.94 E:174.96 S:56.07 W:-176.75

Temporal Extent: 2015-08-10 - 2015-10-09

Project:

GEOTRACES Arctic Section: Determining the Pathways, Fate, and Flux of Atmospherically Derived Trace Elements in the ocean/ice system (GEOTRACES Arctic Atmospheric TE)

U.S. Arctic GEOTRACES Study (GN01) (U.S. GEOTRACES Arctic)

Program:

U.S. GEOTRACES (U.S. GEOTRACES)

Principal Investigator:

David C. Kadko (Florida International University, FIU)

BCO-DMO Data Manager:

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

Version:

Version Date:

2018-08-14

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Beryllium-7 Aerosol Concentration from USCGC Healy cruise HLY1502 in the Canada and Makarov Basins of the Arctic Ocean from August to October 2015 (US GEOTRACES Arctic)

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Methods & Sampling

A total of fourteen 3-4 day integrated aerosol samples were collected during the US GEOTRACES Western Arctic research cruise (GN01, Marsay et al., 2016), which took place from 9th August to 12th October 2015 on the USCGC Healy (cruise HLY1502). Aerosol samples were obtained with a Tisch TE-5170V-BL high volume aerosol sampler, modified to collect 12 replicate samples on acid-washed (Wallace et al, 1977; Baker et al., 2006) 47mm diameter Whatman-41 (W-41) filters, using procedures of the US GEOTRACES aerosol program (Morton et al., 2013). In order to minimize the filter blanks for our experiment, the W-41 filters were pre-cleaned before deployment using three cycles of leaching with 0.5M HCl (Optima) then rinsing with ultra-high purity water (UHP water) according to trace element protocols in a HEPA-filtered laminar flow hood (Morton et al., 2013; similar to Baker et al., 2006).

For 7Be, three of the 47mm aerosol samples were stacked in a plastic Petri dish and counted by gamma spectroscopy. Be-7 has a readily identifiable gamma peak at 478 keV. The counting system was calibrated for all samples by preparing a commercial standard in geometry identical to the samples.

Please refer to: Kadko & Olson (1996) and Kadko et al. (2016) (full citations below).

Data Processing Description

bd = below detection limit.

BCO-DMO Processing:
- changed date format from mm/dd/yyyy HH:MM to yyyy-mm-ddTHH:MM;
- replaced blanks (no data) with "nd";
- 05-Sept-2018: corrected longitude values by reversing sign.

Data Files

File
Aerosol_Be7.csv (Comma Separated Values (.csv), 1.44 KB) MD5:0125c58f8482463da1599b3e3e1a4295 Primary data file for dataset ID 743554

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1434085

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
HLY1502	GN01 U.S. GEOTRACES Arctic 32H120150809	2015-08-09	USCGC Healy	David C. Kadko (Chief Scientist) William M. Landing (Co-Chief Scientist)	data info

Instruments

Aerosol Sampler

Supplied Name: Tisch TE-5170V-BL

Supplied Description:

Aerosol samples were obtained with a Tisch TE-5170V-BL high volume aerosol sampler.

Instrument Type

Generic Name: Aerosol Sampler

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/13/

Generic Description:

A device that collects a sample of aerosol (dry particles or liquid droplets) from the atmosphere.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
GEOTRC_EVENTNO	GEOTRACES event number	unitless	event
GEOTRC_SAMPNO	Unique GEOTRACES sample number	unitless	sample
SAMPLE_ID	Aerosol sample number	unitless	sample
ISO_DateTime_UTC_Start	Date and time, formatted to the ISO 8601 standard, at the start of the sampling event. Format: YYYY-MM-DDTHH:MM:SS[.xx]Z	unitless	ISO_DateTime_UTC
START_LAT	Latitude at the start of the sampling event; north is positive	decimal degrees	lat
START_LONG	Longitude at the start of the sampling event; east is positive	decimal degrees	lon
ISO_DateTime_UTC_End	Date and time, formatted to the ISO 8601 standard, at the end of the sampling event. Format: YYYY-MM-DDTHH:MM:SS[.xx]Z	unitless	ISO_DateTime_UTC
END_LAT	Latitude at the end of the sampling event; north is positive	decimal degrees	lat
END_LONG	Longitude at the end of the sampling event; east is positive	decimal degrees	lon
AIR_VOL	Volume of air sampled	cubic meters	sample_volume
Be_7_A_T_CONC_HIVOL	Beryllium-7 Aerosol Concentration	milliBecquerel per cubic meter (mBq/m3)	metal_conc_air
Be_7_A_T_CONC_HIVOL_ERR	Beryllium-7 Aerosol error	milliBecquerel per cubic meter (mBq/m3)	metal_conc_air

Status message

Database

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Dataset: GN01 Aerosol Be-7