Dataset: Nitrogen and carbon fixation rates - bulk seawater
Deployment: AT39-05

Nitrogen and carbon fixation rates - bulk seawater

View Data: For data, See Dataset Metadata Page: https://www.bco-dmo.org/dataset/766334

Principal Investigator:

David A. Hutchins (University of Southern California, USC)

Co-Principal Investigator:

Eric A. Webb (University of Southern California, USC)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

Collaborative Research: Iron and phosphorus balanced limitation of nitrogen fixation in the oligotrophic ocean (TriCoLim)

Version:

Deployment Synonyms:

TriCoLim

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Description

These data reports nitrogen and carbon fixation rates from bulk water samples collected on RV/Atlantic cruise AT39-05, Feb-Mar 2018.

Methods & Sampling

Dataset acquisition description

Shipboard incubation experiments were carried out at 15 stations in the tropical Atlantic with trace metal clean-collected bulk water to examine iron (Fe) and phosphorus (P) co-limitation of dinitrogen (N2) fixation (see TriCoLim Station coordinates metadata). Treatments were: Co-limited control (no additions, “Colimit”), + 2nM Fe (“Fe”), + 50 nM P (“P”) and Replete (+Fe+P, “Rep”). All incubations were carried out at ambient (“Lo”) temperature and ambient temperature +3C (“Hi”) for 2-4 days on deck before measuring 15N2 and 13CO2 fixation rates and particulate organic carbon (POC) and nitrogen (PON). See related datasets.

Nitrogen and carbon fixation rates - Trichodesmium	Nitrogen and carbon fixation rates from Trichodesmium colonies from RV/Atlantic cruise AT39-05, Feb-Mar 2018
POC and PON - bulk seawater	POC and PON from bulk seawater samples from RV/Atlantic cruise AT39-05, Feb-Mar 2018
POC and PON - Trichodesmium	POC and PON from Trichodesmium colonies from RV/Atlantic cruise AT39-05, Feb-Mar 2018

Data Processing Description

Dataset Processing Description

BCO-DMO Processing Notes:
- added conventional header with dataset name, PI name, version date
- modified parameter names to conform with BCO-DMO naming conventions
- reduced lat and lon precision from 14 to 3 places to better reflect sampling precision

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1657757	NSF Division of Ocean Sciences

Instruments

Trace Metal Bottle

Supplied Name:

Supplied Description:

Used to collect clean seawater.

Instrument Type

Generic Name: Trace Metal Bottle

Acronym: TM Bottle

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

Generic Description:

Trace metal (TM) clean rosette bottle used for collecting trace metal clean seawater samples.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Station	station identifier	unitless	station
Experiment_ID	experiment_id identifier	unitless	exp_id
Latitude	latitude; north is positive	decimal degrees	lat
Longitude	longitude; east is positive	decimal degrees	lon
Sample_D	sample identifier	unitless	sample
Treatment	treatment: Lo temp = ambient temperature Hi temp = ambient temperature plus 3 degrees C. Colimit = Co-limited control (no additions) Fe = 2nM Fe P = 50 nM P Rep = Replete (+Fe+P)	unitless	treatment
N2_fix	nitrogen fixation rate measured as 15N2	micromol/liter/hour (umol/l/h)	N2_fix
C_fix	carbon fixation rate measured as 13CO2	micromol/liter/hour (umol/l/h)	no_bcodmo_term

Database

Contribute Data

Dataset: Nitrogen and carbon fixation rates - bulk seawater
Deployment: AT39-05

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Nitrogen and carbon fixation rates - bulk seawaterDeployment: AT39-05

Dataset acquisition description

Dataset Processing Description

Dataset: Nitrogen and carbon fixation rates - bulk seawater
Deployment: AT39-05