Dataset: GP15 d13C-DIC Leg 1

Name: d13C of Dissolved Inorganic Carbon (DIC) measured on bottle cast samples from Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018
Published: 2022-02-21
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.869595.1

Spatial Extent: N:55.08 E:-152 S:19.68 W:-155.72

Temporal Extent: 2018-09-24 - 2018-10-21

Project:

Decadal trends in oceanic anthropogenic CO2 from the CLIVAR and GO-SHIP d13C datasets and in an ocean biogeochemistry model (CO2 Decadal Trends)

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

Program:

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

Principal Investigator:

Paul Quay (University of Washington, UW)

BCO-DMO Data Manager:

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

Version:

Version Date:

2022-02-21

Restricted:

Validated:

Yes

Current State:

Final no updates expected

d13C of Dissolved Inorganic Carbon (DIC) measured on bottle cast samples from Leg 1 (Seattle, WA to Hilo, HI) of the US GEOTRACES Pacific Meridional Transect (PMT) cruise (GP15, RR1814) on R/V Roger Revelle from September to October 2018

Abstract:

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2022-02-21	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.869595.1	2022-06-27

Methods & Sampling

Niskin seawater samples were collected in 250 ml bottles and poisoned with 100 µl of mercuric chloride. In the lab, approximately 100 ml was transferred from the bottle to a bubbler attached to a high vacuum line. Samples were acidified with 1 ml of 50% phosphoric acid before stripping with He gas at 200 ml min⁻¹. CO₂ gas was collected cryogenically in a liquid nitrogen cold trap after removal of water vapor. CO₂ yield was calculated manometrically (1σ = 5 µmol kg⁻¹) before transfer to a vacuum flask for isotopic analysis.

Data Processing Description

Data Quality Flags:
2 = good;
3 = questionable;
4 = bad.

BCO-DMO Processing:
- renamed fields to comply with BCO-DMO naming conventions;
- converted Start_Time_UTC field to 4 digits;
- created Start_ISO_DateTime_UTC field.

Data Files

File
d13C-DIC_Leg1.csv (Comma Separated Values (.csv), 34.51 KB) MD5:214be713aae3a0bcbb105a36fc86b41f Primary data file for dataset ID 869595

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1829796

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

Isotope-ratio Mass Spectrometer

Supplied Name: Thermo Scientific MAT253

Supplied Description:

The d13C of the CO₂ gas was measured on a Thermo Scientific MAT253 isotope ratio mass spectrometer.

Instrument Type

Generic Name: Isotope-ratio Mass Spectrometer

Acronym: IR Mass Spec; IRMS

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB16/

Generic Description:

The Isotope-ratio Mass Spectrometer is a particular type of mass spectrometer used to measure the relative abundance of isotopes in a given sample (e.g. VG Prism II Isotope Ratio Mass-Spectrometer).

Niskin bottle

Supplied Name: Niskin

Supplied Description:

Instrument Type

Generic Name: Niskin bottle

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/

Generic Description:

A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.

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	Start date; format: MM-DD-YY Format: %m-%d-%y	unitless	date
Start_Time_UTC	Start time (UTC); format: hhmm Format: %H%M	unitless	time
Start_ISO_DateTime_UTC	Start date and time (UTC) in ISO8601 format: YYYY-MM-DDThh:mmZ Format: %Y-%m-%dT%H:%M:%SZ	unitless	ISO_DateTime_UTC
End_Date_UTC	End date (no data)	unitless	date
End_Time_UTC	End time (UTC) (no data)	unitless	time
Start_Latitude	Start latitude	decimal degrees North	lat
Start_Longitude	Start longitude	decimal degrees East	lon
End_Latitude	End latitude (no data)	decimal degrees North	lat
End_Longitude	End longitude (no data)	decimal degrees East	lon
Event_ID	Event number	unitless	event
Sample_ID	GEOTRACES sample number	unitless	sample
Sample_Depth	Maximum depth of cast	meters (m)	depth_w
Sample_Pressure	Pressure at Niskin sampling depth	millibars (mbar)	press
DIC_13_12_D_DELTA_BOTTLE_ams5is	d13C of DIC	per mille (vs PDB)	d13C_DIC
SD1_DIC_13_12_D_DELTA_BOTTLE_ams5is	One standard deviation of DIC_13_12_D_DELTA_BOTTLE_ams5is	per mille (vs PDB)	d13C_DIC
Flag_DIC_13_12_D_DELTA_BOTTLE_ams5is	Quality flag for DIC_13_12_D_DELTA_BOTTLE_ams5is. 2 = good, 3 = questionable, 4 = bad.	unitless	q_flag

Status message

Database

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Dataset: GP15 d13C-DIC Leg 1