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Parameter: 18O

Short Description: stable oxygen ration 18

Short Name: 18O

Official Name: 18O

External Identifier: skos:exactMatch: https://www.ebi.ac.uk/ols/ontologies/chebi/terms?iri=http%3A%2F%2Fpurl.obolibrary.org%2Fobo%2FCHEBI_33815

Description

The stable isotope of oxygen with relative atomic mass 17.999160 and 0.205 atom percent natural abundance.

Parameter Occurences in Datasets (10)

Dataset	PI-Supplied Description	PI-Supplied Name
Bottle sample data and water processing samples from CTD casts from the first cruise of SPIROPA project, R/V Neil Armstrong cruise AR29, to the New England Shelfbreak in April 2018.	Littled18	Littled18
Bottle sample data from CTD casts from the second cruise of SPIROPA project, R/V Ronald H. Brown cruise RB1904, to the New England Shelfbreak in May of 2019.	Littled18corr	Littled18corr
Bottle sample data from CTD casts from the third cruise of SPIROPA project, R/V Thomas G. Thompson cruise TN368, to the New England Shelfbreak in July of 2019	D18corr	D18corr
Volume-dependent offsets in NO3- N and O isotope ratios of reference materials (Biological Nitrogen Isotope Fractionation project)	O isotopic composition of nitrate measured with the denitrifier method using a Thermo Delta V GC-IRMS with modified Gas Bench II and a PAL autosampler	delta_18O
Volume-dependent offsets in NO3- N and O isotope ratios of reference materials (Biological Nitrogen Isotope Fractionation project)	Standard deviation of _18O replicates in each trial	stdev_of_delta_18O
Effects of sample volume on N2O recovery and isotopic analysis (Biological Nitrogen Isotope Fractionation project)	O isotopic composition of N2O measured with a Thermo Delta V GC-IRMS with modified Gas Bench II and a PAL autosampler	delta_18O
ẟ15N (ẟ18O) scale contraction was calculated as the percent deviation of the difference between measured ẟ15N (ẟ18O) values of IAEA-NO3 and USGS-34 from the true difference (Biological Nitrogen Isotope Fractionation project)	The percent deviation of the difference between measured _18O values of IAEA-NO3 and USGS-34 from the true difference, using data from datasheet "Incidence of volume effect"	delta_18O_scale_contraction
ẟ15N (ẟ18O) scale contraction was calculated as the percent deviation of the difference between measured ẟ15N (ẟ18O) values of IAEA-NO3 and USGS-34 from the true difference (Biological Nitrogen Isotope Fractionation project)	Propagated standard deviation of _18O scale contraction for each trial	stdev_of_delta_18O_scale_contraction
Flow through sediment core incubations for nitrogen concentration and isotopic fluxes collected in 2013 on the Island of Sylt, Germany in the North Sea.	Nitrous oxide oxygen isotope ratio	N2O_d18O
Flow through sediment core incubations for nitrogen concentration and isotopic fluxes collected in 2013 on the Island of Sylt, Germany in the North Sea.	Nitrite oxygen isotope ratio	NO2_d18O