Cruise track data from the underway acquisition system from R/V Aurora Australis, R/V Southern Surveyor, and RVIB Nathaniel B. Palmer cruises in the Southern Ocean from 1997 to 2001 (CAREER project)

Website: https://www.bco-dmo.org/dataset/3594
Version: 30 January 2012
Version Date: 2012-01-30

Project
» CAREER: Nitrate Isotopes and Biogeochemistry; A Plan for coupling (CAREER)
ContributorsAffiliationRole
Sigman, Daniel M.Princeton UniversityPrincipal Investigator
DiFiore, PeterPrinceton UniversityContact
McKee, TheresaWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager


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Parameters

ParameterDescriptionUnits
cruise_IDCruise identifier dimensionless
start_datestart date of dataset YYYYMMDD
end_dateend date of data set YYYYMMDD
datedate of sample YYYYMMDD
latlatitude decimal degrees
lonlongitude decimal degrees
timeTime of cast HHMM

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Deployments

AU9701

Website
Platform
R/V Aurora Australis
Report
Start Date
1997-09-09
End Date
1997-09-22

AU9804

Website
Platform
R/V Aurora Australis
Report
Start Date
1998-10-29
End Date
1998-12-27

AU9901

Website
Platform
R/V Aurora Australis
Report
Start Date
1999-07-13
End Date
1999-10-07

SS9902

Website
Platform
R/V Southern Surveyor
Report
Start Date
1999-02-06
End Date
1999-02-14

NBP0101

Website
Platform
RVIB Nathaniel B. Palmer
Report
Start Date
2001-01-30
End Date
2001-03-28


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Project Information

CAREER: Nitrate Isotopes and Biogeochemistry; A Plan for coupling (CAREER)

Coverage: Subantarctic waters, Antarctic Zone, and Ross Sea


Nitrate is a ubiquitous form of biologically available nitrogen in the environment. Based on previous method development in the principal investigator's laboratory, CAREER graduate students and undergraduates investigate the nitrogen (N) and oxygen (O) isotopes of nitrate as 'tracers' of the N cycle, focusing on the marine environment. Research centers on two projects: (1) lab culture, in vitro assay, and field incubation studies of the coupled N and O isotope dynamics of nitrate assimilation and denitrification, two of the critical reactions in the N cycle; and (2) incorporation of the N and O isotopes of nitrate into numerical models of ocean circulation and biogeochemistry. These projects, in the context of the oceanic data sets generated in the principal investigator's laboratory, allow for the quantification of biogeochemical processes the signals of which are otherwise complicated by their simultaneous occurrence and by ocean circulation.

Oceanic data used in this project includes Nitrogen and delta 15N of dissolved nitrate relative to atmospheric N2 (dN15_NO3) collected during five cruises in the Southern Ocean -- in September, 1997, March, 1998, and August, 1998, February, 2001, and November 2006.  During the last two cruises, samples of Oxygen isotopic composition (18O/16O) of nitrate (d180_NO3) were also collected.

Related files and references:
DiFiore, P. J., D. M. Sigman, T. W. Trull, M. J. Lourey, K. Karsh, G.Cane, and R. Ho (2006), Nitrogen isotope constraints on subantarctic biogeochemistry, J. Geophys. Res., 111, C08016, doi:10.1029/2005JC003216.

DiFiore, P. J., D. M. Sigman, and R. B. Dunbar (2009), Upper ocean nitrogen fluxes in the Polar Antarctic Zone: Constraints from the nitrogen and oxygen isotopes of nitrate, Geochem. Geophys. Geosyst.,10, Q11016, doi:10.1029/2009GC002468.



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Funding

Funding SourceAward
NSF Division of Ocean Sciences (NSF OCE)
NSF Division of Ocean Sciences (NSF OCE)
NSF Antarctic Sciences (NSF ANT)

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