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Data Summary: Greenhouse Gases and Other Atmospheric Gases WDCGG (World Data Centre for Greenhouse Gases) https://gaw.kishou.go.jp/static/publications/summary/sum43/sum43.pdf

Methane standard gases for atmospheric measurements at the MRI and JMA and intercomparison experiments H. Matsueda, Y. Sawa, A. Wada, H. Y. Inoue, K. Kazuto Suda, Y. Hirano, K. Tsuboi, and S. Nishioka https://doi.org/10.2467/mripapers.54.91

Long-term trends of greenhouse gases in regional and background events observed during 1998–2004 at Yonagunijima located to the east of the Asian continent Y. Tsutsumi, K. Mori, M. Ikegami, T. Tashiro, and K. Tsuboi https://doi.org/10.1016/j.atmosenv.2006.04.036

Assessment of recent advances in measurement techniques for atmospheric carbon dioxide and methane observations C. Zellweger, L. Emmenegger, M. Firdaus, J. Hatakka, M. Heimann, E. Kozlova, T. G. Spain, M. Steinbacher, M. V. van der Schoot, and B. Buchmann https://doi.org/10.5194/amt-9-4737-2016

High resolution temporal profiles in the Emissions Database for Global Atmospheric Research (EDGAR) M. Crippa, E. Solazzo, G. Huang, D. Guizzardi, E. Koffi, M. Muntean, C. Schieberle, R. Friedrich, and G. Janssens-Maenhout https://doi.org/10.2904/JRC_DATASET_EDGAR