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.本数据集涵盖氮同位素比值（d¹⁵N，以大气N₂为标度）、氧同位素比值（d¹⁸O，以维也纳标准平均海洋水（VSMOW）为标度），以及氮同位素分子内分布（SP，即d¹⁵Nₐ - d¹⁵Nᵦ，其中a和b分别代表N₂O分子中的中心氮原子与末端氮原子）。 研究团队通过航空器分别在0.5千米与7千米高度采集空气样品，样品分别装入2升和1升的玻璃烧瓶，采样压力约为0.2兆帕。每份样品的等分试样均在配备自制样品前处理系统的气相色谱-同位素比值质谱仪（GC-IRMS）上完成分析。