We developed a battery-powered CO2
measurement system for monitoring at the summit of Mt. Fuji, which experiences severe environmental conditions without access to gridded electricity for 10 months. Our measurement system used 100 batteries to run the measurement unit during these months. CO2
mole fractions at Mt. Fuji demonstrated clear seasonal variation. The trend and the variability of the CO2
growth rate observed at Mt. Fuji was very similar to that of the Mauna Loa Observatory.