Methane concentrations of ice core Skytrain Ice Rise

Continuous CH4 determined by cavity ringdown spectroscopy (Picarro G2301 CRDS) on air separated from meltwater from a continuous flow melt device.采用Picarro G2301型腔环衰光谱仪（Cavity Ringdown Spectroscopy, CRDS），对从连续流融解装置产出的融水中分离得到的空气进行连续甲烷（CH4）测定。