Instrument: Isotope-ratio Mass Spectrometer

Dataset: 
Noble gas observations and model runs
Instrument: 
Isotope-ratio Mass Spectrometer
Instrument Short Name: IR Mass Spec; IRMS
Community Standard Description
(http://vocab.nerc.ac.uk/collection/L05/current/LAB16/)
Instrument 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).

PI supplied instrument name: isotope ratio mass spectrometer (Finnigan MAT 251 or Delta XL at UW, MAT 253 at UVic)
Dataset-specific description

Used for Hamme & Emerson (2013) gas measurements