Dataset: Nitrous Oxide Concentration
Deployment: N-SPOT_Yellowfin_Cruises

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

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)

Project:

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

Deployment Synonyms:

NSPOT, N-SPOT, SPOT

Data URL:

https://osprey.bco-dmo.org/dataset-deployment/774577/data

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Description

Methods & Sampling

Dataset acquisition description

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

Dataset 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.

More information about this dataset deployment

Funding

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

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

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

Database

Contribute Data

Dataset: Nitrous Oxide Concentration
Deployment: N-SPOT_Yellowfin_Cruises

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Nitrous Oxide ConcentrationDeployment: N-SPOT_Yellowfin_Cruises

Dataset acquisition description

Dataset Processing Description

Dataset: Nitrous Oxide Concentration
Deployment: N-SPOT_Yellowfin_Cruises