Keiichi Katsumata

Temporal changes in the emissions of CH ₄ and CO from China estimated from CH ₄ / CO ₂ and CO / CO ₂ correlations observed at Hateruma Island

Yasunori Tohjima, M. K. Kubo, Chika Minejima et al. · Atmospheric chemistry and physics · 2014 · 114 citations · Full text

Natural Sciences, Earth Sciences, Environmental Sciences +13

Effect of air composition (N ₂ , O ₂ , Ar, and H ₂ O) on CO ₂ and CH ₄ measurement by wavelength-scanned cavity ring-down spectroscopy: calibration and measurement strategy

Hideki Nara, Hiroshi Tanimoto, Yasunori Tohjima et al. · Atmospheric measurement techniques · 2012 · 100 citations · Full text

Natural Sciences, Chemistry, Atmospheric Chemistry +15

Theoretical and experimental evaluation of the isotope effect of NDIR analyzer on atmospheric CO₂ measurement

Yasunori Tohjima, Keiichi Katsumata, Isamu Morino et al. · Journal of Geophysical Research Atmospheres · 2009 · 53 citations

Natural Sciences, Chemistry, Analytical Chemistry +16

Silicon isotope separation utilizing infrared multiphoton dissociation of Si2F6 irradiated with two-frequency CO2 laser lights

Atsushi Yokoyama, Hironori Ohba, Masanori Hashimoto et al. · Applied Physics B · 2004 · 28 citations

Natural Sciences, Chemistry, Materials Science +14

Observation of atmospheric oxygen/nitrogen ratio aboard a cargo ship using gas chromatography/thermal conductivity detector

Hiroaki Yamagishi, Yasunori Tohjima, Hitoshi Mukai et al. · Journal of Geophysical Research Atmospheres · 2012 · 14 citations

Natural Sciences, Earth Sciences, Environmental Sciences +16