Stable isotope ratios (isotopocule ratios) of atmospheric N2O observed over Novosibirsk from 2005 to 2022

Nitrogen isotope ratio (d15N, air N2 scale), oxygen isotope ratio (d18O, VSMOW scale), and intramolecular distribution of nitrogen isotope (SP, =d15Na-d15Nb, where a and b respectively designate central and end N in N2O molecule) are presented.
Air samples were collected at 0.5 km and 7 km hight into 2-L and 1-L glass flasks, respectively, at a pressure of approx. 0.2 MPa using an aircraft. An aliquot of each sample was analized on a gas chromatograph-isotope ratio mass spectrometer (GC-IRMS) equipped with a home-made sample preparation system.