Dataset: GP15 Reactive Hg CEM

Name: Gaseous ionic (so-called "reactive") mercury concentration in the atmosphere, measured using cation ion exchange (CEM) membranes on the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814 & RR1815) on R/V Roger Revelle from Sept-Nov 2018
Published: 2020-12-14
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.833629.1

Spatial Extent: N:55.932 E:-129.059 S:19.681 W:-156.81

Temporal Extent: 2018-09-20 - 2018-10-21

Project:

US GEOTRACES Pacific Meridional Transect (GP15) (U.S. GEOTRACES PMT)

US GEOTRACES Pacific Meridional Transect: Determination of the air-sea exchange of inorganic and methylated mercury in the anthropogenically-impacted and remote Pacific Ocean (PMT Mercury air-sea exchange)

Program:

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

Principal Investigator:

Robert P. Mason (University of Connecticut, UConn)

BCO-DMO Data Manager:

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

Version:

Version Date:

2020-12-14

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Gaseous ionic (so-called "reactive") mercury concentration in the atmosphere, measured using cation ion exchange (CEM) membranes on the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814 & RR1815) on R/V Roger Revelle from Sept-Nov 2018

Abstract:

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2020-12-14	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.833629.1	2021-01-12

Methods & Sampling

This dataset reports gaseous ionic (so-called "reactive") mercury concentration in the atmosphere, measured using specific filters (cation ion exchange (CEM) membranes).

The sampling system was connected to the sector control device that was used for the collection of high volume aerosol samples so these collections were not made during periods of potential air contamination from the ship. While the sectored sampling system was used, the collection time was different than that of the aerosols, and was typically several days. No GEOTRACES ID's are associated with these samples. Samples were analyzed after the cruise by acid digestion of the filter and analysis using well-established protocols, as detailed in He and Mason (2021). Reported concentrations are average values and their standard deviation for each sampling period. Parameter is named based on the format developed by the GEOTRACES committee as: Hg_G_R_CONC_CEM. In the scientific literature, the measurements are reported with the following acronyms: RGM, RGHg, GOM.

Gaseous reactive mercury measured using CEM is reported in units of picograms per cubic meter (pg/m³).
Detection limit = <1
Spike recovery (%) = 101.2±7.1

Data Processing Description

BCO-DMO Processing:
- added date-time fields in ISO8601 format;
- applied GEOTRACES DOoR barcoded names;
- renamed fields to conform with BCO-DMO naming conventions.

Data Files

File
Hg_CEM.csv (Comma Separated Values (.csv), 2.85 KB) MD5:4b9c59f829b562d0a0628c6e416ee4d8 Primary data file for dataset ID 833629

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1736659

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
RR1814	GP15 GP15 Leg1 33RR20180918 PMT US GEOTRACES PMT	2018-09-18	R/V Roger Revelle	Gregory A. Cutter (Chief Scientist) Karen L. Casciotti (Co-Chief Scientist) Phoebe J. Lam (Co-Chief Scientist)	data info
RR1815	GP15 GP15 Leg 2 33RR20180918 PMT US GEOTRACES PMT	2018-10-24	R/V Roger Revelle	Gregory A. Cutter (Chief Scientist) Karen L. Casciotti (Co-Chief Scientist) Phoebe J. Lam (Co-Chief Scientist)	data info

Instruments

None available yet

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Start_Date_UTC	Date (UTC) at start of sample collection; format: DD/MM/YYYY Format: %d/%m/%Y	unitless	date
End_Date_UTC	Date (UTC) at end of sample collection; format: DD/MM/YYYY Format: %d/%m/%Y	unitless	date
Sample_Depth	Sample depth	meters (m)	depth
Event_ID	Event number	unitless	event
Start_ISO_DateTime_UTC	Date and time (UTC) at start of sample collection; formatted to ISO8601 standard: YYYY-MM-DDThh:mmZ Format: %Y-%m-%dT%H:%MZ	unitless	ISO_DateTime_UTC
End_ISO_DateTime_UTC	Date and time (UTC) at end of sample collection; formatted to ISO8601 standard: YYYY-MM-DDThh:mmZ Format: %Y-%m-%dT%H:%MZ	unitless	ISO_DateTime_UTC
Start_Latitude	Latitude at start of sample collection	degrees North	lat
End_Latitude	Latitude at end of sample collection	degrees North	lat
Start_Longitude	Longitude at start of sample collection	degrees East	lon
End_Longitude	Longitude at end of sample collection	degrees East	lon
Flag_Hg_G_R_CONC_CEM	Quality flag for Hg_G_R_CONC_CEM	unitless	q_flag
SD1_Hg_G_R_CONC_CEM	One standard deviation of Hg_G_R_CONC_CEM	picograms per cubic meter (pg m-3)	reactive_Hg
Hg_G_R_CONC_CEM	Gaseous ionic ("reactive") mercury concentration in the atmosphere, measured using cation ion exchange (CEM) membranes	picograms per cubic meter (pg m-3)	reactive_Hg
Sample_ID	GEOTRACES sample number	unitless	sample
Station_ID	Station number	unitless	station
Start_Time_UTC	Time (UTC) at start of sample collection; format: hh:mm Format: %H:%M	unitless	time
End_Time_UTC	Time (UTC) at end of sample collection; format: hh:mm Format: %H:%M	unitless	time

Database

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Dataset: GP15 Reactive Hg CEM