Dataset: GP16 Acetic Acid Leachable Trace Metals from Aerosols

Name: Acetic acid leachable trace metals from bulk aerosol samples collected during the US GEOTRACES EPZT section cruise (R/V Thomas G. Thompson TN303) in the Eastern Tropical Pacific from October to December 2013
Published: 2020-05-26
Keywords: U.S. GEOTRACES EPTZ, acetic acid leachable aerosols, trace metals, Tropical Pacific, oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.709276.2

Spatial Extent: N:-4.07 E:-77.657 S:-16.0003 W:-152.0003

Temporal Extent: 2013-10-26 - 2013-12-16

Project:

GEOTRACES Pacific section: Collection and analysis of atmospheric deposition (EPZT Aerosol Collection)

U.S. GEOTRACES East Pacific Zonal Transect (GP16) (U.S. GEOTRACES EPZT)

Program:

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

Principal Investigator:

Ana Aguilar-Islas (University of Alaska Fairbanks, UAF)

Co-Principal Investigator:

Clifton S. Buck (Skidaway Institute of Oceanography, SkIO)

William M. Landing (Florida State University, FSU - EOAS)

Contact:

Ana Aguilar-Islas (University of Alaska Fairbanks, UAF)

BCO-DMO Data Manager:

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

Version:

Version Date:

2020-05-26

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Acetic acid leachable trace metals from bulk aerosol samples collected during the US GEOTRACES EPZT section cruise (R/V Thomas G. Thompson TN303) in the Eastern Tropical Pacific from October to December 2013

Abstract:

Atmospheric input is important to the biogeochemical cycling of trace metals in the ocean. The fraction of aerosol trace metals that can potentially dissolve after deposition is of interest for improving knowledge of aerosol/surface ocean interactions. This dataset provides acetic acid leachable trace metal values from bulk aerosol from the Equatorial Pacific along the US GEOTRACES EPTZ transect (TN303) from Peru to Tahiti. This region is characterized as one of the lowest atmospheric deposition regimes in the ocean. Bulk aerosols were collected from the boundary layer (~15 m above sea level) using a high-volume aerosol sampler drawing approximately 1.2 cubic meters of air per minute over Whatman 41 ash-less filter discs. Despite low aerosol loadings, triplicate agreement for most samples was good for Al, Ti, V, Mn, Fe, and Cu. Away from the coast, Cd and Pb values in most samples were close to, or below detection limit. Acetic acid leaches were carried out with a combination of 25% acetic acid and a reducing agent. Leachable trace metal concentrations were determined at the University of Alaska Fairbanks by inductively coupled plasma mass spectrometry (Thermo Element-2) using external calibration curves. The aerosol trace metal fractional solubility was calculated as a percent of the total bulk aerosol data from the same cruise (https://www.bco-dmo.org/dataset/675632).

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Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2020-05-26	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.709276.2	2020-06-22
2017-07-19	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.1575/1912/bco-dmo.717413	2017-10-23

Description

This dataset contains acetic acid leachable trace metals from bulk aerosol samples collected during the 2013 US GEOTRACES EPZT section cruise, TN303, on R/V Thomas G. Thompson.

Methods & Sampling

Samples were collected using Florida State University's high vol aerosol sampler (Tisch Environmental TSP TE5170V), located on the 03 deck, forward railings. Samples were collected at the rate of 1 cubic meter per minute on Whatman 41, 47 mm discs (cellulose esters; W41) and were acid cleaned. Methods are described in Morton et al. (2013).

Data Processing Description

Data have been corrected for field and analytical blank. Reported aerosol trace element concentrations values have been normalized to the volume of air filtered during sample collection. Fractional solubility values are relative to total particulate aerosols. Each sample collection period (n = 17) produced 36 replicate filters. Three of those filters were digested to produce three replicate measurements of total particulate aerosols, and a second set of three filters were leached with acetic acid and a reducing agent to produce three replicate measurements of aerosol leachable trace metals. In the majority of cases, the triplicates were above the field blank value and were in good agreement. Data from the three replicates were averaged and reported along with the standard deviation. Outliers and replicate samples that were below the field blank value were not included in the mean.

Quality flag codes:
Codes follow the SeaDataNet scheme (https://www.geotraces.org/geotraces-quality-flag-policy/)
BDL = below detection limit;
0 = No QC performed;
1 = Good data;
2 = Probably good data;
3 = Probably bad data that is potentially correctable;
4 = Bad data;
5 = Value changed;
6 = Sample < blank;
8 = Interpolated value;
9 = Missing value.

BCO-DMO Processing:
- modified parameter names to conform with BCO-DMO naming conventions;
- replaced missing data values of -999 and -9999 with "nd";
- added date-time columns in ISO8601 format.

Version History:
26 May 2020 (current version) - replaced entire dataset using GEOTRACES DOoR format.
19 Jul 2017 - original version.

Data Files

File
acetic_acid_leachable.csv (Comma Separated Values (.csv), 4.70 KB) MD5:a36d168ae7ff40d2592e555ae341bb5b Primary data file for dataset ID 709276

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1234417
NSF Division of Ocean Sciences	OCE-1454368

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
TN303	GP16 GEOTRACES EPZT GEOTRACES East Pacific Zonal Transect (EPZT) GT13 325020131025	2013-10-25	R/V Thomas G. Thompson	James W. Moffett (Chief Scientist) Gregory A. Cutter (Co-Chief Scientist) Christopher R. German (Co-Chief Scientist)	data info

Instruments

Aerosol Sampler

Supplied Name: Tisch Environmental TSP TE5170V

Supplied Description:

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
Station_ID	Station number	unitless	station
Start_Date_UTC	Sampling date; format: DD/MM/YYYY	unitless	date
Start_Time_UTC	Sampling start time; format: hh:mm	unitless	time
Start_ISO_DateTime_UTC	Sampling start date and time (UTC) formatted to ISO8601 standard: YYYY-MM-DDThh:mmZ	unitless	ISO_DateTime_UTC
End_Date_UTC	Sampling end date; format: DD/MM/YYYY	unitless	date
End_Time_UTC	Sampling end time; format: hh:mm	unitless	time
End_ISO_DateTime_UTC	Sampling end date and time (UTC) formatted to ISO8601 standard: YYYY-MM-DDThh:mmZ	unitless	ISO_DateTime_UTC
Start_Latitude	Sampling start latitude	degrees North	lat
Start_Longitude	Sampling start longitude	degrees East	lon
End_Latitude	Sampling end latitude	degrees North	lat
End_Longitude	Sampling end longitude	degrees East	lon
Event_ID	Event number	unitless	event
Sample_ID	GEOTRACES sample number	unitless	sample
Sample_Depth	Sample depth	meters (m)	depth
air_vol_total	Total volume of air sampled	cubic meters (m3)	sample_volume
Al_A_SSLHAC_CONC_HIVOL_88qmbp	Acetic Acid Leachable particulate aerosol Al concentration, average of 3 replicates. Detection limit = 0.19 ng/m3.	nanograms per cubic meter (ng/m3)	metal_conc_air
SD1_Al_A_SSLHAC_CONC_HIVOL_88qmbp	One standard deviation of Al_A_SSLHAC_CONC_HIVOL_88qmbp	nanograms per cubic meter (ng/m3)	metal_conc_air
Flag_Al_A_SSLHAC_CONC_HIVOL_88qmbp	Quality flag for Al_A_SSLHAC_CONC_HIVOL_88qmbp	unitless	q_flag
Cd_A_SSLHAC_CONC_HIVOL_9mt6ne	Acetic Acid Leachable particulate aerosol Cd concentration, average of 3 replicates. Detection limit = 0.0026 ng/m3.	nanograms per cubic meter (ng/m3)	metal_conc_air
SD1_Cd_A_SSLHAC_CONC_HIVOL_9mt6ne	One standard deviation of Cd_A_SSLHAC_CONC_HIVOL_9mt6ne	nanograms per cubic meter (ng/m3)	metal_conc_air
Flag_Cd_A_SSLHAC_CONC_HIVOL_9mt6ne	Quality flag for Cd_A_SSLHAC_CONC_HIVOL_9mt6ne	unitless	q_flag
Cu_A_SSLHAC_CONC_HIVOL_zmurzd	Acetic Acid Leachable particulate aerosol Cu concentration, average of 3 replicates. Detection limit = 0.001 ng/m3.	nanograms per cubic meter (ng/m3)	metal_conc_air
SD1_Cu_A_SSLHAC_CONC_HIVOL_zmurzd	One standard deviation of Cu_A_SSLHAC_CONC_HIVOL_zmurzd	nanograms per cubic meter (ng/m3)	metal_conc_air
Flag_Cu_A_SSLHAC_CONC_HIVOL_zmurzd	Quality flag for Cu_A_SSLHAC_CONC_HIVOL_zmurzd	unitless	q_flag
Fe_A_SSLHAC_CONC_HIVOL_9ytn8o	Acetic Acid Leachable particulate aerosol Fe concentration, average of 3 replicates. Detection limit = 0.72 ng/m3.	nanograms per cubic meter (ng/m3)	metal_conc_air
SD1_Fe_A_SSLHAC_CONC_HIVOL_9ytn8o	One standard deviation of Fe_A_SSLHAC_CONC_HIVOL_9ytn8o	nanograms per cubic meter (ng/m3)	metal_conc_air
Flag_Fe_A_SSLHAC_CONC_HIVOL_9ytn8o	Quality flag for Fe_A_SSLHAC_CONC_HIVOL_9ytn8o	unitless	q_flag
Mn_A_SSLHAC_CONC_HIVOL_wq15vx	Acetic Acid Leachable particulate aerosol Mn concentration, average of 3 replicates. Detection limit = 0.004 ng/m3.	nanograms per cubic meter (ng/m3)	metal_conc_air
SD1_Mn_A_SSLHAC_CONC_HIVOL_wq15vx	One standard deviation of Mn_A_SSLHAC_CONC_HIVOL_wq15vx	nanograms per cubic meter (ng/m3)	metal_conc_air
Flag_Mn_A_SSLHAC_CONC_HIVOL_wq15vx	Quality flag for Mn_A_SSLHAC_CONC_HIVOL_wq15vx	unitless	q_flag
Pb_A_SSLHAC_CONC_HIVOL_nr31qu	Acetic Acid Leachable particulate aerosol Pb concentration, average of 3 replicates. Detection limit = 0.091 ng/m3.	nanograms per cubic meter (ng/m3)	metal_conc_air
SD1_Pb_A_SSLHAC_CONC_HIVOL_nr31qu	One standard deviation of Pb_A_SSLHAC_CONC_HIVOL_nr31qu	nanograms per cubic meter (ng/m3)	metal_conc_air
Flag_Pb_A_SSLHAC_CONC_HIVOL_nr31qu	Quality flag for Pb_A_SSLHAC_CONC_HIVOL_nr31qu	unitless	q_flag
Ti_A_SSLHAC_CONC_HIVOL_bdezwf	Acetic Acid Leachable particulate aerosol Ti concentration, average of 3 replicates. Detection limit = 0.003 ng/m3.	nanograms per cubic meter (ng/m3)	metal_conc_air
SD1_Ti_A_SSLHAC_CONC_HIVOL_bdezwf	One standard deviation of Ti_A_SSLHAC_CONC_HIVOL_bdezwf	nanograms per cubic meter (ng/m3)	metal_conc_air
Flag_Ti_A_SSLHAC_CONC_HIVOL_bdezwf	Quality flag for Ti_A_SSLHAC_CONC_HIVOL_bdezwf	unitless	q_flag
V_A_SSLHAC_CONC_HIVOL_bsytua	Acetic Acid Leachable particulate aerosol V concentration, average of 3 replicates. Detection limit = 0.0002 ng/m3.	nanograms per cubic meter (ng/m3)	metal_conc_air
SD1_V_A_SSLHAC_CONC_HIVOL_bsytua	One standard deviation of V_A_SSLHAC_CONC_HIVOL_bsytua	nanograms per cubic meter (ng/m3)	metal_conc_air
Flag_V_A_SSLHAC_CONC_HIVOL_bsytua	Quality flag for V_A_SSLHAC_CONC_HIVOL_bsytua	unitless	q_flag