Dataset: Nitrous Oxide Concentration

Name: N2O concentrations from San Pedro Ocean Time-series (SPOT) measured between 2014 to 2016
Published: 2020-11-04
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.774571.2

Spatial Extent: N:33.55 E:-118.4 S:33.55 W:-118.4

Temporal Extent: 2014-09-10 - 2016-08-10

Project:

Collaborative Research: New Approaches to New Production (N-SPOT)

Principal Investigator:

Alyson E. Santoro (University of California-Santa Barbara, UCSB)

Co-Principal Investigator:

Douglas G. Capone (University of Southern California, USC)

BCO-DMO Data Manager:

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

Version:

Version Date:

2020-11-04

Restricted:

Validated:

Yes

Current State:

Final no updates expected

N2O concentrations from San Pedro Ocean Time-series (SPOT) measured between 2014 to 2016

Abstract:

N2O concentrations from San Pedro Ocean Time-series (SPOT) measured between 2014 to 2016. Water samples were collected using a Niskin bottle rosette equipped with a CTD. N₂O concentrations were measured using a headspace equilibration method and analyzed on a SRI Greenhouse Gas Monitoring Gas Chromatograph.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2020-11-04	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.774571.2	2020-11-09
2019-08-06	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.774571.1	2020-08-20

Methods & Sampling

From 2014 to 2015, water samples were collected using a 12 x 12 L Niskin bottle rosette equipped with a conductivity, temperature, and density (CTD) instrument package (SBE 9plus, Sea-Bird Electronics, Bellevue, Washington, USA), including dissolved oxygen (SBE 43) and photosynthetically available radiation (PAR, LI-COR, Biospherical Instruments Inc., San Diego, California, USA) sensors. Due to CTD failure, samples collected in 2015 and 2016 were collected primarily using manually triggered Go-Flo bottles and depths were chosen primarily using a profiling natural fluorometer (PNF) system as well as secchi disk.

N₂O concentrations were measured using a headspace equilibration method and analyzed on a SRI Greenhouse Gas Monitoring Gas Chromatograph (GC) equipped with an electron capture detector (ECD), dual HayeSep D packed columns, and a 1-mL sample loop (SRI Instruments, Torrance, California, USA; Elkins 1980; Laperriere et al. 2019). N₂O concentrations were calculated according to Walter et al. (2006).

Data Processing Description

BCO-DMO Processing:
- changed date format to yyyy-mm-dd;
- replaced NA with nd ("no data");
- 2020-11-06: replaced data with version 2, which corrects errors and adds standard deviation.

Data Files

File
N2O.csv (Comma Separated Values (.csv), 4.85 KB) MD5:cbe77f6338ec8d8ad31ca8de926bdaca Primary data file for dataset ID 774571

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1437310

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
N-SPOT_Yellowfin_Cruises	NSPOT N-SPOT SPOT	2014-09-10	R/V Yellowfin	Douglas G. Capone (Chief Scientist)	data info

Instruments

CTD Sea-Bird 9

Supplied Name: SBE 9plus

Supplied Description:

Instrument Type

Generic Name: CTD Sea-Bird 9

Acronym: CTD SBE 9

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/130/

Generic Description:

The Sea-Bird SBE 9 is a type of CTD instrument package. The SBE 9 is the Underwater Unit and is most often combined with the SBE 11 Deck Unit (for real-time readout using conductive wire) when deployed from a research vessel. The combination of the SBE 9 and SBE 11 is called a SBE 911. The SBE 9 uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 and SBE 4). The SBE 9 CTD can be configured with auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorometer, altimeter, etc.). Note that in most cases, it is more accurate to specify SBE 911 than SBE 9 since it is likely a SBE 11 deck unit was used. more information from Sea-Bird Electronics

Fluorometer

Supplied Name: profiling natural fluorometer

Supplied Description:

Instrument Type

Generic Name: Fluorometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/113/

Generic Description:

A fluorometer or fluorimeter is a device used to measure parameters of fluorescence: its intensity and wavelength distribution of emission spectrum after excitation by a certain spectrum of light. The instrument is designed to measure the amount of stimulated electromagnetic radiation produced by pulses of electromagnetic radiation emitted into a water sample or in situ.

Gas Chromatograph

Supplied Name: SRI Greenhouse Gas Monitoring Gas Chromatograph

Supplied Description:

Instrument Type

Generic Name: Gas Chromatograph

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB02/

Generic Description:

Instrument separating gases, volatile substances, or substances dissolved in a volatile solvent by transporting an inert gas through a column packed with a sorbent to a detector for assay. (from SeaDataNet, BODC)

GO-FLO Bottle

Supplied Name: Go-Flo bottles

Supplied Description:

Instrument Type

Generic Name: GO-FLO Bottle

Acronym: GO-FLO

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/30/

Generic Description:

GO-FLO bottle cast used to collect water samples for pigment, nutrient, plankton, etc. The GO-FLO sampling bottle is specially designed to avoid sample contamination at the surface, internal spring contamination, loss of sample on deck (internal seals), and exchange of water from different depths.

Niskin bottle

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.

Secchi Disc

Supplied Name: secchi disk

Supplied Description:

Instrument Type

Generic Name: Secchi Disc

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0430/

Generic Description:

Typically, a 16 inch diameter white/black quadrant disc used to measure water optical clarity

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
date	Date. Format: yyyy-mm-dd	unitless	date
depth	Depth	meters (m)	depth
n2o	Nitrous oxide concentration	nanomoles per liter (nmol L-1)	N2O
std	Standard deviation of n2o	nanomoles per liter (nmol L-1)	N2O

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Database

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Dataset: Nitrous Oxide Concentration