Dataset: Ammonia and Urea-derived-N Oxidation Rates

Name: Ammonia and urea-derived-N oxidation rates measured using 15N additions from San Pedro Ocean Time-series (SPOT) measured between 2014 to 2016
Published: 2020-08-20
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.774602.2

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:

2020-08-20

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Ammonia and urea-derived-N oxidation rates measured using 15N additions from San Pedro Ocean Time-series (SPOT) measured between 2014 to 2016

Abstract:

Ammonia and urea-derived-N oxidation rates measured using 15N additions 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. Rates of water column ammonia and urea-derived-N oxidation were measured from bottle incubations.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2020-08-20	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.774602.2	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.

Rates of water column ammonia and urea-derived-N oxidation were measured from bottle incubations with ¹⁵NH₄Cl and ¹⁵N-urea (Dugdale and Goering 1967; Sigman et al. 2001; McIlvin and Casciotti 2011; Damashek et al. 2016). Isotope samples were analyzed using a Finnigan Delta Plus XP IRMS and Finnigan Delta Plus Advantage IRMS at the University of California Davis Stable Isotope Facility, the Central Appalachians Stable Isotope Facility at the University of Maryland Center for Environmental Science, and the Marine Science Institute Analytical Laboratory at the University of California, Santa Barbara.

Data Processing Description

BCO-DMO Processing:
- changed date format from mm-dd-yyyy to yyyy-mm-dd;
- replaced blanks (no data) with "nd".

Data Files

File
rates.csv (Comma Separated Values (.csv), 3.04 KB) MD5:53d0577df7f112b71d0d84a88f57472e Primary data file for dataset ID 774602

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.

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.

Isotope-ratio Mass Spectrometer

Supplied Name: Finnigan Delta Plus XP IRMS, Finnigan Delta Plus Advantage IRMS

Supplied Description:

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 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
nh4_ox_1	Ammonia oxidation rate	nanomoles N per liter per day (nmol N L-1 d-1)	N
nh4_ox_2	Ammonia oxidation rate	nanomoles N per liter per day (nmol N L-1 d-1)	N
nh4_ox_3	Ammonia oxidation rate	nanomoles N per liter per day (nmol N L-1 d-1)	N
urea_ox_1	Urea-derived-N oxidation rate	nanomoles N per liter per day (nmol N L-1 d-1)	N
urea_ox_2	Urea-derived-N oxidation rate	nanomoles N per liter per day (nmol N L-1 d-1)	N
urea_ox_3	Urea-derived-N oxidation rate	nanomoles N per liter per day (nmol N L-1 d-1)	N

Status message

Database

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Dataset: Ammonia and Urea-derived-N Oxidation Rates