Dataset: Nitrogen and carbon fixation rates - bulk seawater

Name: Nitrogen and carbon fixation rates from bulk water samples from RV/Atlantic cruise AT39-05, Feb-Mar 2018
Published: 2019-05-02
Keywords: Bulk seawater, nitrogen fixation, carbon fixation, Atlantic, oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.766334.1

Spatial Extent: N:13.6776 E:-21.998 S:-7.9989 W:-55.8123

Temporal Extent: 2018-02-11 - 2018-03-14

Project:

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

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)

Version:

Version Date:

2019-05-02

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Nitrogen and carbon fixation rates from bulk water samples from RV/Atlantic cruise AT39-05, Feb-Mar 2018

Abstract:

Nitrogen and carbon fixation rates from bulk water samples from RV/Atlantic cruise AT39-05, Feb-Mar 2018.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2019-05-02	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.766334.1	2020-05-04

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

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

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

Data Files

File
NCfix_bulkH2O.csv (Comma Separated Values (.csv), 16.14 KB) MD5:a05e8b98f25e8675c1c7a5205e41d511 Primary data file for dataset ID 766334

More Information about this dataset

Funding Sources

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

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
AT39-05	TriCoLim	2018-02-11	R/V Atlantis	David A. Hutchins (Chief Scientist)	data info

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

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

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