Dataset: Nitrogen isotopes in coral skeleton
Deployment: CoralClimateProj_Kiritimati

Nitrogen isotopes of coral skeleton-bound organic matter

Principal Investigator:

Daniel M. Sigman (Princeton University)

Co-Principal Investigator:

Anne L. Cohen (Woods Hole Oceanographic Institution, WHOI)

Samantha J. de Putron (Bermuda Institute of Ocean Sciences, BIOS)

Contact:

Xingchen Wang (California Institute of Technology, Caltech)

BCO-DMO Data Manager:

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

Project:

Collaborative Research: Identifying the Role of Basin-scale Climate Variability in the Decline of Atlantic Corals (Coral climate effects)

Deployment Synonyms:

CoralClimateProj_Christmas_isl

Data URL:

https://www.bco-dmo.org/dataset-deployment/683165/data

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Description

These data were published in Wang et al., 2016 and Wang et al., 2018.

The following table is a statistical summary of results:
Table1, Wang et al., 2016 (pdf)

Methods & Sampling

Dataset acquisition description

The “age” for these corals were determined by either counting growth rings on X-ray images of the coral skeleton or matching with other parameters (Sr/Ca or oxygen isotopes) in the same coral skeleton.

At each site, the core-averaged skeletal d15N was first calculated by averaging all available d15N data in each coral core. Then the site-averaged skeletal d15N was calculated by averaging the core-averaged skeletal d15N of all coral cores from the same site.

Samples from Bermuda were collected from a single brain coral (of the species Diploria labyrinthiformis) at Hog Reef, Bermuda (32.45811, -64.83445) in July of 2014 at a depth of 3m.

For more details, see Wang et al., 2016.

Deployment-specific acquisition description

Sampling took place in 1998.

Data Processing Description

Dataset Processing Description

BCO-DMO 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'
* Changed site name "Christmas Island" to "Kiritimati Island" to be consistent with publication referenced.
* added sampling depth, sampling year, approximate latitude and longitude site locations that were included in a statistical summary table.
* rounded fractional calendar year to three decimal places in Oman data
* dataset v1: 2017-02-27 replaced by dataset version v2: 2018-09-14. Data from Bermuda added to the dataset.

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1536368	NSF Division of Ocean Sciences
OCE-1536547	NSF Division of Ocean Sciences
OCE-1537338	NSF Division of Ocean Sciences

Instruments

Isotope-ratio Mass Spectrometer

Supplied Name: IRMS

Supplied Description:

Used "denitrifier method" with isotope ratio mass spectrometer (IRMS)

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

Supplied Name	Supplied description	Supplied Units	Standard Name
site	Location of sampling	unitless	site
collection_year	Year of collection in format yyyy	unitless	year
lat_approx	Approximate latitude of sampling site	decimal degrees	lat
lon_approx	Approximate longitude of sampling site	decimal degrees	lon
site_depth	Depth of sampling location	meters	depth
age	Age of coral colony sampled	decimal year	age
depth	Depth (middle interval) within sample core	centimeters	depth_core
CS_d15N_avg	Average Coral Skeletal d15N. d15N is the ratio of stable isotopes 15N:14N.	permil (0/00) vs air	d15N_bio
CS_d15N_1sd	First standard deviation of Coral Skeletal d15N. d15N is the ratio of stable isotopes 15N:14N.	permil (0/00) vs air	d15N_bio

Database

Contribute Data

Dataset: Nitrogen isotopes in coral skeleton
Deployment: CoralClimateProj_Kiritimati

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Nitrogen isotopes in coral skeletonDeployment: CoralClimateProj_Kiritimati

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Dataset: Nitrogen isotopes in coral skeleton
Deployment: CoralClimateProj_Kiritimati