Dataset: GP15 Hg Rain Leg 1

Name: Total dissolved mercury and methylmercury from rainfall samples collected on Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from Sept-Oct 2018
Published: 2020-12-09
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.833369.1

Spatial Extent: N:54.66 E:-152 S:22 W:-155.171

Temporal Extent: 2018-09-28 - 2018-10-20

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:

2020-12-09

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Total dissolved mercury and methylmercury from rainfall samples collected on Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from Sept-Oct 2018

Abstract:

Total dissolved mercury and total dissolved methylmercury concentrations from rainfall samples collected on Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from Sept-Oct 2018.

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Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2020-12-09	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.833369.1	2021-01-12

Methods & Sampling

This dataset reports total dissolved mercury concentration and total dissolved methylmercury concentration in precipitation collected with an automated collector by the GEOTRACES atmospheric sampling group.

For Total Dissolved Mercury:
Rain was subsampled after collection for mercury analysis. The sample is identified by a GEOTRACES event ID. The samples were acidified on board and later analyzed for their total mercury concentration using standard techniques, as detailed in DiMento et al. (2019).

Total dissolved mercury is reported in units of pmol/L.
Detection limit = 0.8
Spike recovery (%) = 100.6±8.8

For Total Dissolved Methylmercury:
Rain was subsampled after collection for mercury analysis – both total Hg and methylmercury were analyzed from the same subsample. The sample is identified by a GEOTRACES event ID. The samples were acidified on board and later analyzed for their total mercury concentration using standard techniques, as detailed in DiMento et al. (2019).

Total dissolved methylmercury is reported in units of pmol/L.
Detection limit = 0.01
Spike recovery (%) = 124.1±6.5

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_Rain_Leg1.csv (Comma Separated Values (.csv), 809 bytes) MD5:424e1de7ef9f68cc5c3cbc4fbf96fb73 Primary data file for dataset ID 833369

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

Instruments

Precipitation Sampler

Supplied Name: Automated rain sampler

Supplied Description:

Instrument Type

Generic Name: Precipitation Sampler

Acronym: Precip_Sampler

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/14/

Generic Description:

A device that collects a sample of precipitation (rain, hail or snow) as it falls.

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	Date (UTC) at start of sample collection; format: DD/MM/YYYY Format: %d/%m/%Y	unitless	date
Start_Time_UTC	Time (UTC) at start of sample collection; format: hh:mm Format: %H:%M	unitless	time
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_Date_UTC	Date (UTC) at end of sample collection; format: DD/MM/YYYY Format: %d/%m/%Y	unitless	date
End_Time_UTC	Time (UTC) at end of sample collection; format: hh:mm Format: %H:%M	unitless	time
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
Start_Longitude	Longitude at start of sample collection	degrees East	lon
End_Latitude	Latitude at end of sample collection	degrees North	lat
End_Longitude	Longitude at end of sample collection	degrees East	lon
Event_ID	Event number	unitless	event
Sample_ID	GEOTRACES sample number	unitless	sample
Sample_Depth	Sample depth	meters (m)	depth
Hg_R_TD_CONC_AUTO_dijhxy	Total dissolved mercury concentration in precipitation, collected with an automated precipitation collector	picomoles per liter (pmol/L)	total_Hg
SD1_Hg_R_TD_CONC_AUTO_dijhxy	One standard deviation of Hg_R_TD_CONC_AUTO_dijhxy	picomoles per liter (pmol/L)	total_Hg
Flag_Hg_R_TD_CONC_AUTO_dijhxy	Quality flag for Hg_R_TD_CONC_AUTO_dijhxy	unitless	q_flag
Hg_Me_R_TD_CONC_AUTO_8ckake	Total dissolved methylmercury concentration in rainfall, collected with an automated precipitation collector	picomoles per liter (pmol/L)	MMHg
SD1_Hg_Me_R_TD_CONC_AUTO_8ckake	One standard deviation of Hg_Me_R_TD_CONC_AUTO_8ckake	picomoles per liter (pmol/L)	MMHg
Flag_Hg_Me_R_TD_CONC_AUTO_8ckake	Quality flag for Hg_Me_R_TD_CONC_AUTO_8ckake	unitless	q_flag

Status message

Database

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Dataset: GP15 Hg Rain Leg 1