Dataset: Southern Ocean deep-sea fossil coral (Desmophyllum dianthus) nitrogen isotope records: Monte Carlo and Kalman Filters

Name: Southern Ocean deep-sea fossil coral (Desmophyllum dianthus) nitrogen isotope records generated using Monte Carlo and Kalman Filters generated using Monte Carlo and Kalman Filters (DeepSeaCoralNitrogen project)
Published: 2017-04-28
Keywords: oceans

Cite This Dataset

Project:

Nitrogen isotopic (d15N) composition of carbonate-bound organic nitrogen in Deep Sea Corals: A new, high resolution proxy for N cycle studies (DeepSeaCoralNitrogen)

Principal Investigator:

Maria Prokopenko (Pomona College, Pomona)

Co-Principal Investigator:

Daniel M. Sigman (Princeton University)

Contact:

Xingchen Wang (California Institute of Technology, Caltech)

BCO-DMO Data Manager:

Amber D. York (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version Date:

2017-04-28

Restricted:

Validated:

Yes

Current State:

Final with updates expected

Southern Ocean deep-sea fossil coral (Desmophyllum dianthus) nitrogen isotope records generated using Monte Carlo and Kalman Filters generated using Monte Carlo and Kalman Filters (DeepSeaCoralNitrogen project)

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Description

[Note: 28 Apr 2017] The metadata description of this dataset is still in progress. The metadata have not yet been reviewed by the data contributor.

This dataset contains average scleractinian coral (Desmophyllum dianthus) nitrogen isotope records over the past 40,000 years generated using Monte Carlo and Kalman Filters approaches.

These data were published in:

Wang, X. T., Sigman, D. M., Prokopenko, M. G., Adkins, J. F., Robinson, L. F., Hines, S. K., ... & Haug, G. H. (2017). Deep-sea coral evidence for lower Southern Ocean surface nitrate concentrations during the last ice age. Proceedings of the National Academy of Sciences, 201615718. doi: 10.1073/pnas.1615718114

Related dataset also from this publication:
Southern Ocean deep-sea coral nitrogen isotopes

Methods & Sampling

A synthetic time series of d15N and age were generated using observed measurements in Tasmania and the Drake Passage. Monte Carlo simulation and a Kalman smoother were combined to obtain the best estimate of the average d15N time series on a regular time grid and its corresponding confidence interval.

For a more detailed methodology description see:

Data Processing Description

BCO-DMO Data Manager Processing Notes:
* added a conventional header with dataset name, PI name, version date
* modified parameter names to conform with BCO-DMO naming conventions
* blank values replaced with no data value 'nd'
* combined Excel sheets in original .xlsx file into one tabular dataset. Created column "source_location" to capture region information which was why the sheets were originally separated.

Data Files

File
MonteCarlo.csv (Comma Separated Values (.csv), 40.73 KB) MD5:b6a3715d8afc26b588df432787315a3d Primary data file for dataset ID 692791

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1234664

Deployments

None available yet

Instruments

Gas Chromatograph

Supplied Name: Gas chromatography

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)

Isotope-ratio Mass Spectrometer

Supplied Name: isotope ratio mass spectrometry

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).

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
source_location	Location of sample collection	unitless	site
age	Monte Carlo Age (year) in format yyyy	unitless	age
d15N	d15N (ratio of stable isotopes 15N:14N);Generated using Monte Carlo and Kalman Filter statistical techniques	permil vs. air (0/00 vs air)	d15N_bio
d15N_sd1	One sigma errors of d15N	permil vs. air (0/00 vs air)	d15N_bio
d15N_sd2	Two sigma errors of d15N	permil vs. air (0/00 vs air)	d15N_bio

Status message

Database

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Dataset: Southern Ocean deep-sea fossil coral (Desmophyllum dianthus) nitrogen isotope records: Monte Carlo and Kalman Filters