[ACC26-P04] Methane concentration measurements of the Dome Fuji ice core using Continuous Flow Analysis system
Keywords:Continuous Flow Analysis, Ice core, CH4, Dome Fuji
The CH4 concentration measured by CFA is affected by several factors, impacting precision, accuracy and resolution. The factors include dissolution of CH4 in meltwater and its imperfect extraction, sample mixing and smoothing in sample lines, and contamination by room air intrusion into the system at the interface between ice samples. The magnitudes of these effects have been investigated, and the data are corrected accordingly. Here, we report the results of various tests for assessing the performance of our CFA for CH4 measurement. Furthermore, the results of the measurement campaigns of the Dome Fuji ice core, covering the 8.2-kyr cooling event and a part of the last deglaciation, will also be presented.