Ballav, S., M. Naja, P.K. Patra, T. Machida and H. Mukai (2019), Assessment of spatio-temporal distribution of CO2 over greater Asia using the WRF-CO2 model, Journal of Earth System Science, JESS-D-19-00295R1, in press.

Belikov, D., M. Arshinov, B. Belan, D. Davydov, A. Fofonov, M. Sasakawa and T. Machida (2019), Analysis of the Diurnal, Weekly, and Seasonal Cycles and Annual Trends in Atmospheric CO2 and CH4 at Tower Network in Siberia from 2005 to 2016, Atmosphere 2019, 10(11), 689; https://doi.org/10.3390/atmos10110689

Inai, Y., R. Fujita, T. Machida, H. Matsueda, Y. Sawa, K. Tsuboi, K. Katsumata, S. Morimoto, S. Aoki, and T. Nakazawa (2019), Seasonal characteristics of chemical and dynamical transports into the extratropical upper troposphere/lower stratosphere, Atmos. Chem. Phys., 19, 7073?7103, https://doi.org/10.5194/acp-19-7073-2019.

Matsueda, H., R. Buchholz, K. Ishijima, H. Worden, D. Hammerling, and T. Machida (2019), Interannual Variation of Upper Tropospheric CO over the Western Pacific Linked with Indonesian Fires, SOLA, 2019, Vol. 15, 205?210, doi:10.2151/sola.2019-037

Ouchi, M., Matsumi, Y., Nakayama, T., Shimizu, K., Sawada, T., Machida, T., Matsueda, H., Sawa, Y., Morino, I., Uchino, O., Tanaka, T., and Imasu, R. (2019), Development of a balloon-borne instrument for CO2 vertical profile observations in the troposphere, Atmos. Meas. Tech., 12, 5639?5653, https://doi.org/10.5194/amt-12-5639-2019

Tohjima, Y., Mukai, H., Machida, T., Hoshina, Y., and Nakaoka, S. (2019), Global carbon budgets estimated from atmospheric O2?N2 and CO2 observations in the western Pacific region over a 15-year period, Atmos. Chem. Phys., 19, 9269?9285, https://doi.org/10.5194/acp-19-9269-2019

Wang, F., S. Maksyutov, A. Tsuruta, R. Janardanan, A. Ito, M. Sasakawa, T. Machida, I. Morino, Y. Yoshida, J. Kaiser, G. Janssens-Maenhout, E. Dlugokencky, I. Mammarella, J. Valentin Lavric and T. Matsunaga (2019), Methane Emission Estimates by the Global High-Resolution Inverse Model Using National Inventories, Remote Sens. 2019, 11, 2489; doi:10.3390/rs11212489

Ishidoya S, Sugawara S, Inai Y, S. Morimoto, H. Honda, C. Ikeda, G. Hashida, T. Machida, Y. Tomikawa, S. Toyoda, D, Goto, S. Aoki and T. Nakazawa (2018), Gravitational separation of the stratospheric air over Syowa, Antarctica and its connection with meteorological fields. Atmos Sci Lett. https://doi.org/10.1002/asl.857

Groot Zwaaftink, C. D., Henne, S., Thompson, R. L., Dlugokencky, E. J., Machida, T., Paris, J. D., Sasakawa, M., Segers, A., Sweeney, C., and Stohl, A. (2018), Three-dimensional methane distribution simulated with FLEXPART 8-CTM-1.1 constrained with observation data, Geosci. Model Dev., 11, 4469-4487, 2018, https://doi.org/10.5194/gmd-11-4469-2018

Umezawa, T., Matsueda, H., Sawa, Y., Niwa, Y., Machida, T., and Zhou, L. (2018), Seasonal evaluation of tropospheric CO2 over the Asia-Pacific region observed by the CONTRAIL commercial airliner measurements, Atmos. Chem. Phys., 18, 14851-14866, https://doi.org/10.5194/acp-18-14851-2018.

Hoshina, Y., Tohjima, Y., Katsumata, K., Machida, T., and Nakaoka, S.-I. (2018), In situ observation of atmospheric oxygen and carbon dioxide in the North Pacific using a cargo ship, Atmos. Chem. Phys., 18, 9283-9295, https://doi.org/10.5194/acp-18-9283-2018.

Wang, J. S., Kawa, S. R., Collatz, G. J., Sasakawa, M., Gatti, L. V., Machida, T., Liu, Y., and Manyin, M. E. (2018), A global synthesis inversion analysis of recent variability in CO2 fluxes using GOSAT and in situ observations, Atmos. Chem. Phys., 18, 11097-11124, https://doi.org/10.5194/acp-18-11097-2018.

Saunois, M., Bousquet, P., Poulter, B., Peregon, A., Ciais, P., Canadell, J. G., Dlugokencky, E. J., Etiope, G., Bastviken, D., Houweling, S., Janssens-Maenhout, G., Tubiello, F. N., Castaldi, S., Jackson, R. B., Alexe, M., Arora, V. K., Beerling, D. J., Bergamaschi, P., Blake, D. R., Brailsford, G., Bruhwiler, L., Crevoisier, C., Crill, P., Covey, K., Frankenberg, C., Gedney, N., H?glund-Isaksson, L., Ishizawa, M., Ito, A., Joos, F., Kim, H.-S., Kleinen, T., Krummel, P., Lamarque, J.-F., Langenfelds, R., Locatelli, R., Machida, T., Maksyutov, S., Melton, J. R., Morino, I., Naik, V., O'Doherty, S., Parmentier, F.-J. W., Patra, P. K., Peng, C., Peng, S., Peters, G. P., Pison, I., Prinn, R., Ramonet, M., Riley, W. J., Saito, M., Santini, M., Schroeder, R., Simpson, I. J., Spahni, R., Takizawa, A., Thornton, B. F., Tian, H., Tohjima, Y., Viovy, N., Voulgarakis, A., Weiss, R., Wilton, D. J., Wiltshire, A., Worthy, D., Wunch, D., Xu, X., Yoshida, Y., Zhang, B., Zhang, Z., and Zhu, Q. (2017) , Variability and quasi-decadal changes in the methane budget over the period 2000-2012, Atmos. Chem. Phys., 17, 11135-11161, https://doi.org/10.5194/acp-17-11135-2017.

Nara, H., H. Tanimoto, Y. Tohjima, H. Mukai, Y. Nojiri and T. Machida (2017), Emission factors of CO2, CO and CH4 from Sumatran peatland fires in 2013 based on shipboard measurements, Tellus B: Chemical and Physical Meteorology, 69:1,1399047, DOI: 10.1080/16000889.2017.1399047.

Saitoh, N., S. Kimoto, R. Sugimura, R. Imasu, K. Shiomi, A. Kuze, Y. Niwa, T. Machida, Y. Sawa, and H. Matsueda (2017), Bias assessment of lower and middle tropospheric CO2 concentrations of GOSAT/TANSO-FTS TIR Version 1 product, Atmos. Meas. Tech., 10, 3877-3892, https://doi.org/10.5194/amt-10-3877-2017.

Takata K., Patra P.K., Kotani A., Mori J., Belikov D., Ichii K., Saeki T., Ohta T., Saito K., Ueyama M.,, Ito A., Maksyutov S., Miyazaki S., Burke E.J., Ganshin A., Iijima Y., Ise T., Machiya H., Maximof T.C., Niwa Y., O, Park H., Sasai T., Tei S., Zhuravlev R., Machida T., Sugimoto A., Aoki S. (2017) Reconciliation of top-down and bottom-up CO2 fluxes in Siberian larch forest. Environ. Res. Lett. 12, 125012, doi.org/10.1088/1748-9326/aa926d.

Sasakawa M., Machida T., Ishijima K., Arshinov M., Patra P. K., Ito A., Aoki S., Petrov V. (2017) Temporal characteristics of CH4 vertical profiles observed in the West Siberian Lowland over Surgut from 1993 to 2015 and Novosibirsk from 1997 to 2015. J. Geophys. Res., 122, 11,261-11,273. doi.org/10.1002/2017JD026836.

Nomura, S., H. Mukai, Y. Terao, T. Machida and Y. Nojiri (2017), Six years of atmospheric CO2 observations at Mt. Fuji recorded with a battery-powered measurement system, Atmos. Meas. Tech., 10, 667-680, doi:10.5194/amt-10-667-2017.

Niwa, Y., Tomita, H., Satoh, M., Imasu, R., Sawa, Y., Tsuboi, K., Matsueda, H., Machida, T., Sasakawa, M., Belan, B., and Saigusa, N. (2017), A 4D-Var inversion system based on the icosahedral grid model (NICAM-TM 4D-Var v1.0) - Part 1: Offline forward and adjoint transport models, Geosci. Model Dev., 10, 1157-1174, doi:10.5194/gmd-10-1157-2017.

Thompson R.L., Sasakawa M., Machida T., Aalto T., Worthy D., Lavric J.V. , Myhre C.L., Stohl A. (2017), Methane fluxes in the high northern latitudes for 2005-2013 estimated using a Bayesian atmospheric inversion. Atmos. Chem. Phys., 17, 3553-3572, https://doi.org/10.5194/acp-17-3553-2017.

Kim, J., Kim, H. M., Cho, C.-H., Boo, K.-O., Jacobson, A. R., Sasakawa, M., Machida, T., Arshinov, M., and Fedoseev, N. (2017), Impact of Siberian observations on the optimization of surface CO2 flux, Atmos. Chem. Phys., 17, 2881-2899, https://doi.org/10.5194/acp-17-2881-2017.

Umezawa, T., Y. Niwa, Y. Sawa, T. Machida and H. Matsueda (2016), Winter crop CO2 uptake inferred from CONTRAIL measurements over Delhi, India, Geophys. Res. Lett. doi: 10.1002/2016GL070939.

Tan Z., Zhuang Q., Henze D.K., Frankenberg C., Dlugokencky E., Sweeney C., Turner A.J. , Sasakawa M., Machida T. (2016) Inverse modeling of pan-Arctic methane emissions at high spatial resolution: what can we learn from assimilating satellite retrievals and using different process-based wetland and lake biogeochemical models?. Atmos. Chem. Phys., 16, 12649-12666, doi:10.5194/acp-16-12649-2016,

Pandey, S., Houweling, S., Krol, M., Aben, I., Chevallier, F., Dlugokencky, E. J., Gatti, L. V., Gloor, E., Miller, J. B., Detmers, R., Machida, T., and R?ckmann, T. (2016), Inverse modeling of GOSAT-retrieved ratios of total column CH4 and CO2 for 2009 and 2010, Atmos. Chem. Phys., 16, 5043-5062, doi:10.5194/acp-16-5043-2016.

Inoue, M., Morino, I., Uchino, O., Nakatsuru, T., Yoshida, Y., Yokota, T., Wunch, D., Wennberg, P. O., Roehl, C. M., Griffith, D. W. T., Velazco, V. A., Deutscher, N. M., Warneke, T., Notholt, J., Robinson, J., Sherlock, V., Hase, F., Blumenstock, T., Rettinger, M., Sussmann, R., Kyr?, E., Kivi, R., Shiomi, K., Kawakami, S., De Mazi?re, M., Arnold, S. G., Feist, D. G., Barrow, E. A., Barney, J., Dubey, M., Schneider, M., Iraci, L. T., Podolske, J. R., Hillyard, P. W., Machida, T., Sawa, Y., Tsuboi, K., Matsueda, H., Sweeney, C., Tans, P. P., Andrews, A. E., Biraud, S. C., Fukuyama, Y., Pittman, J. V., Kort, E. A., and Tanaka, T. (2016), Bias corrections of GOSAT SWIR XCO2 and XCH4 with TCCON data and their evaluation using aircraft measurement data, Atmos. Meas. Tech., 9, 3491-3512, doi:10.5194/amt-9-3491-2016.

Thompson, R., P. Patra, F. Chevallier, S. Maksyutov, R. Law, T. Ziehn, I. van der Laan-Luijkx, W. Peters, A. Ganshin, R. Zhuravlev, T. Maki, T. Nakamura, T. Shirai, M. Ishizawa, T. Saeki, T. Machida, B. Poulter, J. Canadell and P. Ciais (2016), Top-down assessment of the Asian carbon budget since the mid 1990s, Nature Communications 7, Article number: 10724.

Jiang, F., J. Chen, L. Zhou, W. Ju, H. Zhang, T. Machida, P. Ciais, W. Peters, H. Wang, B. Chen, L. Liu, C. Zhang, H. Matsueda and Y. Sawa (2016), A comprehensive estimate of recent carbon sinks in China using both top-down and bottom-up approaches, Scientific Reports 6, Article number: 22130.

Saitoh, N., Kimoto, S., Sugimura, R., Imasu, R., Kawakami, S., Shiomi, K., Kuze, A., Machida, T., Sawa, Y., and Matsueda, H. (2016), Algorithm update of the GOSAT/TANSO-FTS thermal infrared CO2 product (version 1) and validation of the UTLS CO2 data using CONTRAIL measurements, Atmos. Meas. Tech., 9, 2119-2134, doi:10.5194/amt-9-2119-2016.

Ono, A., S. Hayashida, T. Sugita, T. Machida, M. Sasakawa and M. Arshinov (2015), Comparison of GOSAT SWIR and Aircraft Measurements of XCH4 over West Siberia, SOLA, Vol.11, 160-164.

Tohjima, Y., Terao, Y., Mukai, H., Machida, T., Nojiri, Y., & Maksyutov, S. (2015). ENSO-related variability in latitudinal distribution of annual mean atmospheric potential oxygen (APO) in the equatorial Western Pacific. Tellus B, 67. doi:http://dx.doi.org/10.3402/tellusb.v67.25869.

Berchet, A., I. Pison, F. Chevallier, J.-D. Paris, P. Bousquet, J.-L. Bonne, M. Y. Arshinov, B. D. Belan, C. Cressot, D. K. Davydov, E. J. Dlugokencky, A. V. Fofonov, A. Galanin, J. Lavri?, T. Machida, R. Parker, M. Sasakawa, R. Spahni, B. D. Stocker, and J. Winderlich (2015), Natural and anthropogenic methane fluxes in Eurasia: a mesoscale quantification by generalized atmospheric inversion, Biogeosciences, 12, 5393-5414, doi:10.5194/bg-12-5393-2015.

Matsueda, H., T. Machida, Y. Sawa, and Y. Niwa (2015), Long-term change of CO2 latitudinal distribution in the upper troposphere, Geophys. Res. Lett., 42, doi:10.1002/2014GL062768.

Sawa, Y., T. Machida, H. Matsueda, Y. Niwa, K. Tsuboi, S. Murayama, S. Morimoto, and S. Aoki (2015), Seasonal changes of CO2, CH4, N2O, and SF6 in the upper troposphere/lower stratosphere over the Eurasian continent observed by commercial airliner, Geophys. Res. Lett., 42, doi:10.1002/2014GL062734.

Reuter, M., Buchwitz, M., Hilker, M., Heymann, J., Schneising, O., Pillai, D., Bovensmann, H.,Burrows, J. P., B?sch, H., Parker, R., Butz, A., Hasekamp, O., O'Dell, C. W., Yoshida, Y., Gerbig, C., Nehrkorn, T., Deutscher, N. M., Warneke, T., Notholt, J., Hase, F., Kivi, R., Sussmann, R., Machida, T., Matsueda, H., and Sawa, Y. (2014), Satellite-inferred European carbon sink larger than expected, Atmos. Chem. Phys., 14, 13739-13753, doi:10.5194/acp-14-13739-2014.

Inoue, M., Morino, I., Uchino, O., Miyamoto, Y., Saeki, T., Yoshida, Y., Yokota, T., Sweeney, C., Tans, P. P., Biraud, S. C., Machida, T., Pittman, J. V., Kort, E. A., Tanaka, T., Kawakami, S., Sawa, Y., Tsuboi, K., and Matsueda, H. (2014), Validation of XCH4 derived from SWIR spectra of GOSAT TANSO-FTS with aircraft measurement data, Atmos. Meas. Tech., 7, 2987-3005, doi:10.5194/amt-7-2987-2014.

Jiang, F., Wang, H. M., Chen, J. M., Machida, T., Zhou, L. X., Ju, W. M., Matsueda, H., and Sawa, Y. (2014), Carbon balance of China constrained by CONTRAIL aircraft CO2 measurements, Atmos. Chem. Phys., 14, 10133-10144, doi:10.5194/acp-14-10133-2014.

Zhang, H. F., Chen, B. Z., Machida, T., Matsueda, H., Sawa, Y., Fukuyama, Y., Langenfelds, R., van der Schoot, M., Xu, G., Yan, J. W., Cheng, M. L., Zhou, L. X., Tans, P. P., and Peters, W. (2014), Estimating Asian terrestrial carbon fluxes from CONTRAIL aircraft and surface CO2 observations for the period 2006-2010, Atmos. Chem. Phys., 14, 5807-5824, doi:10.5194/acp-14-5807-2014.

Saikawa, E., Prinn, R. G., Dlugokencky, E., Ishijima, K., Dutton, G. S., Hall, B. D., Langenfelds, R., Tohjima, Y., Machida, T., Manizza, M., Rigby, M., O'Doherty, S., Patra, P. K., Harth, C. M., Weiss, R. F., Krummel, P. B., van der Schoot, M., Fraser, P. B., Steele, L. P., Aoki, S., Nakazawa, T., and Elkins, J. W. (2014), Global and regional emissions estimates for N2O, Atmos. Chem. Phys., 14, 4617-4641, doi:10.5194/acp-14-4617-2014.

Basu, S., M. Krol, A. Butz, C. Clerbaux, Y. Sawa, T. Machida, H. Matsueda, C. Frankenberg, O. P. Hasekamp, and I. Aben (2014), The seasonal variation of the CO2 flux over Tropical Asia estimated from GOSAT, CONTRAIL, and IASI, Geophys. Res. Lett., 41, 1809-1815, doi:10.1002/2013GL059105.

Niwa, Y., K. Tsuboi, H. Matsueda, Y. Sawa, T. Machida, M. Nakamura, T. Kawasato, K. Saito, S. Takatsuji, K. Tsuji, H. Nishi, K. Dehara, Y. Baba, D. Kuboike, S. Iwatsubo, H. Ohmori, and Y. Hanamiya (2014), Seasonal variations of CO2, CH4, N2O and CO in the mid-troposphere over the western North Pacific observed using a C-130H cargo aircraft, J. Meteorol. Soc. Japan, 92(1), 50-70, doi:10.2151/jmsj.2014-104.

Tohjima, Y., Kubo, M., Minejima, C., Mukai, H., Tanimoto, H., Ganshin, A., Maksyutov, S., Katsumata, K., Machida, T., and Kita, K. (2014), Temporal changes in the emissions of CH4 and CO from China estimated from CH4 / CO2 and CO / CO2 correlations observed at Hateruma Island, Atmos. Chem. Phys., 14, 1663-1677, doi:10.5194/acp-14-1663-2014.

Saeki, T., S. Maksyutov, M. Sasakawa, T. Machida, M. Arshinov, P. Tans, T. Conway, M. Saito, V. Valsala, T. Oda, R. Andres, D. Belikov (2013), Carbon flux estimation for Siberia by inverse modeling constrained by aircraft and tower CO2 measurements, J. Geophys, Res. 118, doi:10.1029/2012JD018462.

Toyoda, S., N. Kuroki, N. Yoshida, K. Ishijima, Y. Tohjima, and Machida T. (2013), Decadal time series of tropospheric abundance of N2O isotopomers and isotopologues in the Northern Hemisphere obtained by the long-term observation at Hateruma Island, Japan, J. Geophys. Res., 118, doi:10.1002/jgrd.50221.

Saito, R., P. Patra, C. Sweeney, T. Machida, M. Krol, S. Houweling, P. Bousquet, A. Agusti-Panareda, D. Belikov, D. Bergmann, H. Bian, P. Cameron-Smith, M. Chipperfield, A. Fortems-Cheiney, A. Fraser, L. Gatti, E. Gloor, P. Hess, S. Kawa, R. Law, R. Locatelli, Z. Loh, S. Maksyutov, L. Meng, J. Miller, P. Palmer, R. Prinn, M. Rigby, C. Wilson (2013), TransCom model simulations of methane: comparison of vertical profiles with aircraft measurements, J. Geophys. Res., 118, 3891-3904, doi:10.1002/jgrd.50380.

Pisso, I., Patra, P., Takigawa, M., Machida, T., Matsueda, H., and Sawa, Y. (2013), Anthropogenic CO2 flux constraints in the Tokyo Bay Area from Lagrangian diffusive backward trajectories and high resolution in situ measurements, Atmos. Chem. Phys. Discuss., 12, 10623-10649, doi:10.5194/acpd-12-10623-2012.

Crevoisier, C., Nobileau, D., Armante, R., Cr?peau, L., Machida, T., Sawa, Y., Matsueda, H., Schuck, T., Thonat, T., Pernin, J., Scott, N. A., and Chedin, A. (2013), The 2007-2011 evolution of tropical methane in the mid-troposphere as seen from space by MetOp-A/IASI, Atmos. Chem. Phys., 13, 4279-4289, doi:10.5194/acp-13-4279-2013.

Miyamoto, Y., Inoue, M., Morino, I., Uchino, O., Yokota, T., Machida, T., Sawa, Y., Matsueda, H., Sweeney, C., Tans, P. P., Andrews, A. E., and Patra, P. K. (2013), Atmospheric column-averaged mole fractions of carbon dioxide at 53 aircraft measurement sites, Atmos. Chem. Phys., 13, 5265-5275, doi:10.5194/acp-13-5265-2013.

Inoue, M., Morino, I., Uchino, O., Miyamoto, Y., Yoshida, Y., Yokota, T., Machida, T., Sawa, Y., Matsueda, H., Sweeney, C., Tans, P. P., Andrews, A. E., and Patra, P. K. (2013), Validation of XCO2 derived from SWIR spectra of GOSAT TANSO-FTS with aircraft measurement data, Atmos. Chem. Phys, 13, 9771-9788, doi:10.5194/acp-13-9771-2013.

Sasakawa, M., T. Machida, N. Tsuda, M. Arshinov, D. Davydov, A. Fofonov, and O. Krasnov (2013), Aircraft and tower measurements of CO2 concentration in the planetary boundary layer and the lower free troposphere over southern taiga in West Siberia: Long-term records from 2002 to 2011, J. Geophys. Res., 118, doi:10.1002/jgrd.50755.

Sawa, Y., T. Machida, and H. Matsueda, (2012), Aircraft observation of the seasonal variation in the transport of CO2 in the upper atmosphere, J. Geophys. Res., 117, D05305, doi:10.1029/2011JD016933.

Sasakawa, M., A. Ito, T. Machida, N. Tsuda, Y. Niwa, D. Davydov, A. Fofonov and M. Arshinov (2012), Annual variation of CH4 emissions from the middle taiga in West Siberian Lowland (2005-2009): a case of high CH4 flux and precipitation rate in the summer of 2007, Tellus B, 64, 17514, DOI: 10.3402/tellusb.v64i0.17514

Umezawa, T., T. Machida, S. Aoki, and T. Nakazawa (2012), Contributions of natural and anthropogenic sources to atmospheric methane variations over Western Siberia estimated from its carbon and hydrogen isotopes, Global Biogeochem. Cycles, 26, GB4009, doi:10.1029/2011GB004232.

Tanaka, T., Miyamoto, Y., Morino, I., Machida, T., Nagahama, T., Sawa, Y., Matsueda, H., Wunch, D., Kawakami, S., and Uchino, O. (2012), Aircraft measurements of carbon dioxide and methane for the calibration of ground-based high-resolution Fourier Transform Spectrometers and a comparison to GOSAT data measured over Tsukuba and Moshiri, Atmos. Meas. Tech., 5, 2003-2012, doi:10.5194/amt-5-2003-2012.

Saitoh, N., M. Touno, S. Hayashida, R. Imasu, K. Shiomi, T. Yokota, Y. Yoshida, T. Machida, H. Matsueda, and Y. Sawa, (2012), Comparisons between XCH4 from GOSAT shortwave and thermal infrared spectra and aircraft CH4 measurements over Guam. SOLA, 8, 145?149, doi:10.2151/sola.2012-036.

Niwa, Y., T. Machida, Y. Sawa, H. Matsueda, T.J. Schuck, C.A.M. Brenninkmeijer, R. Imasu, and M. Satoh, (2012) Imposing strong constraints on tropical terrestrial CO2 fluxes using passenger aircraft based measurements, J. Geophys. Res. 117, D11303, doi:10.1029/2012JD017474.

Umezawa, T., Machida, T., Ishijima, K., Matsueda, H., Sawa, Y., Patra, P. K., Aoki, S., and Nakazawa, T. (2012), Carbon and hydrogen isotopic ratios of atmospheric methane in the upper troposphere over the Western Pacific, Atmos. Chem. Phys., 12, 8095-8113, doi:10.5194/acp-12-8095-2012.

Schuck, T. J., K. Ishijima, P. K. Patra, A. K. Baker, T. Machida, H. Matsueda, Y. Sawa, T. Umezawa, C. A. M. Brenninkmeijer, and J. Lelieveld (2012), Distribution of methane in the tropical upper troposphere measured by CARIBIC and CONTRAIL aircraft, J. Geophys. Res., 117, D19304, doi:10.1029/2012JD018199.

Shirai, T., T. Machida, H. Matsueda, Y. Sawa, Y. Niwa, S. Maksyutov, and K. Higuchi (2012), Relative contribution of transport/surface flux to the seasonal vertical synoptic CO2 variability in the troposphere over Narita, Tellus B, 64, 19138.

Tohjima, Y., C. Minejima, H. Mukai, T. Machida, H. Yamagishi, and Y. Nojiri (2012), Analysis of seasonality and annual mean distribution of atmospheric potential oxygen (APO) in the Pacific region, Global Biogeochem. Cycles, 26, GB4008, doi:10.1029/2011GB004110.

Feng, L., Palmer, P. I., Yang, Y., Yantosca, R. M., Kawa, S. R., Paris, J.-D., Matsueda, H., and Machida, T. (2011), Evaluating a 3-D transport model of atmospheric CO2 using ground-based, aircraft, and space-borne data, Atmos. Chem. Phys., 11, 2789-2803, doi:10.5194/acp-11-2789-2011.

Patra, P. K., Niwa, Y., Schuck, T. J., Brenninkmeijer, C. A. M., Machida, T., Matsueda, H., and Sawa, Y. (2011), Carbon balance of South Asia constrained by passenger aircraft CO2 measurements, Atmos. Chem. Phys., 11, 4163-4175, doi:10.5194/acp-11-4163-2011.

Y. Terao, H. Mukai, Y. Nojiri, T. Machida, Y. Tohjima, T. Saeki and S. Maksyutov, (2011) Interannual variability and trends in atmospheric methane over the western Pacific from 1994 to 2010. J. Geophys. Res. 116, D14303, doi:10.1029/2010JD015467

H. Nara, H. Tanimoto, Y. Nojiri, H. Mukai, J. Zeng, Y. Tohjima, and T. Machida (2011), CO emissions from biomass burning in South-east Asia in the 2006 El Ni?o year: shipboard and AIRS satellite observations. Environ. Chem., 8, 213-223. doi:10.1071/EN10113.

Kim, H-S., S. Maksyutov, M.V. Glagolev, T. Machida, P.K. Patra, K. Sudo and G. Inoue (2011), Evaluation of methane emissions from west Siberian wetlands based on inverse modeling. Environ. Res. Lett., 6, 035201, doi:10.1088/1748-9326/6/3/035201.

Sabrekov, A. F., I. E. Kleptsova, M. V. Glagolev, Sh. Sh. Maksyutov, T. Machida (2011), Methane emission from middle taiga oligotrophic hollows of Western Siberia, Bull. Tomsk State Pedagogical Univ., n. 5(107), pp. 135-143.

Glagolev, M., I. Kleptsova, I. Filippov, S. Maksyutov and T. Machida (2011), Regional methane emission from West Siberia mire landscapes. Environ. Res. Lett. 6, 045214.

Nara, H., H. Tanimoto, Y. Nojiri, H. Mukai, T. Machida and Y. Tohjima (2011), Onboard measurement system of atmospheric carbon monoxide in the Pacific by voluntary observing ship. Atmos. Meas. Tech., 4, 2495-2507.

Chevallier, F., N. Deutscher, T.J. Conway, P. Ciais, L. Ciattaglia, S. Dohe, M. Fr?hlich, A.J. Gomez-Pelaez, D. Griffith, F. Hase, L. Haszpra, P. Krummel, E. Kyr?, C. Labuschagne, R. Langenfelds, T. Machida, F. Maignan, H. MatsuedaI. Morino, J. Notholt, M. Ramonet, Y. Sawa, M. Schmidt, V. Sherlock, P. Steele, K. Strong, R. Sussmann, P. Wennberg, S. Wofsy, D. Worthy, D. Wunch, M. Zimnoch (2011), Global CO2 fluxes inferred from surface air-sample measurements and from TCCON retrievals of the CO2 total column. Geophys. Res. Lett., 38, (2011), 24, doi:10.1029/2011GL049899

Basu, S., S. Houweling, W. Peters, C. Sweeney, T. Machida, S. Maksyutov, P. Patra, R. Saito, F. Chevallier, Y. Niwa, H. Matsueda and Y. Sawa (2011), The seasonal cycle amplitude of total column CO2: Factors behind the model-observation mismatch. J. Geophys. Res., 116, D23306, doi:10.1029/2011JD016124.

Niwa, Y., P. K. Patra, Y. Sawa, T. Machida, H. Matsueda, D. Belikov, T. Maki, M. Ikegami, R. Imasu, S. Maksyutov, T. Oda, M. Satoh, and M. Takigawa, (2011), Three-dimensional variations of atmospheric CO2: aircraft measurements and multi-transport model simulations. Atmos. Chem. Phys., 11, 13359-13375, doi:10.5194/acp-11-13359-2011.

Kulawik, S. S., Jones, D. B. A., Nassar, R., Irion, F. W., Worden, J. R., Bowman, K. W., Machida, T., Matsueda, H., Sawa, Y., Biraud, S. C., Fischer, M., and Jacobson, A. R. (2010), Characterization of Tropospheric Emission Spectrometer (TES) CO2 for carbon cycle science, Atmos. Chem. Phys., 10, 5601-5623, doi:10.5194/acp-10-5601-2010.

Araki, M., Morino, I., Machida, T., Sawa, Y., Matsueda, H., Yokota, T., and Uchino, O. (2010), CO2 column-averaged volume mixing ratio derived over Tsukuba from measurements by commercial airlines, Atmos. Chem. Phys., 10, 7659-7667, doi:10.5194/acp-10-7659-2010.

Watai, T., T. Machida, K. Shimoyama, O. Krasnov, M. Yamamoto, G. Inoue (2010), Development of Atmospheric Carbon Dioxide Standard Gas Saving System and its Application to a Measurement at a Site in West Siberian Forest, J. Atmos. Oceanic Technol., 27, 843-855. doi: 10.1175/2009JTECHA1265.1

Sasakawa, M., K. Shimoyama, T. Machida, N. Tsuda, H. Suto, M. Arshinov, D. Davydov, A. Fofonov, O. Krasnov, T. Saeki, Y. Koyama, and S. Maksyutov (2010), Continuous measurements of methane from a tower network over Siberia, Tellus B, 62: 403-416. doi: 10.1111/j.1600-0889.2010.00494.x

Chevallier, F., P. Ciais, T. J. Conway, B. E. T. Aalto, Anderson, P. Bousquet, E. G. Brunke, Y. Esaki, M. Fr?hlich, A.J. Gomez-Pelaez, L. Haszpra, P. Krummel, R. Langenfelds, M. Leuenberger, T. Machida, F. Maignan, H. Matsueda, J. A. Morgu?, H. Mukai, T. Nakazawa, P. Peylin, M. Ramonet, L. Rivier, Y. Sawa, M. Schmidt, P. Steele, S. A. Vay, A. T. Vermeulen, S. Wofsy, D. Worthy (2010), CO2 surface fluxes at grid point scale estimated from a global 21-year reanalysis of atmospheric measurements, J. Geophys. Res., 115, D21307, doi:10.1029/2010JD013887.

Xiong, X., C. D. Barnet, Q. Zhuang, T. Machida, C. Sweeney, and P. K. Patra (2010), Mid‐upper tropospheric methane in the high Northern Hemisphere: Spaceborne observations by AIRS, aircraft measurements, and model simulations, J. Geophys. Res., 115, D19309, doi:10.1029/2009JD013796.

Ishijima, K. , P. K. Patra , M. Takigawa ,T. Machida , H. Matsueda , Y. Sawa, P. Steele, P. Krummel, R. Langenfelds, S. Aoki and T. Nakazawa (2010), Stratospheric influence on the seasonal cycle of nitrous oxide in the troposphere as deduced from aircraft observations and model simulations, J. Geophys. Res., 115, D20308, doi:10.1029/2009JD013322.

町田敏暢、笹川基樹、下山宏、M. Arshinov, D. Davydov, A. Fofonov, O. Krasnov, N. Fedoseev, S. Mitin, 須藤洋志、勝又啓一、津田憲次、中澤高清、S. Maksyutov (2010)、シベリアにおける温室効果ガスの時空間分布、低温科学 68, 9-19.

Wunch, D., Toon, G. C., Wennberg, P. O., Wofsy, S. C., Stephens, B. B., Fischer, M. L., Uchino, O., Abshire, J. B., Bernath, P., Biraud, S. C., Blavier, J.-F. L., Boone, C., Bowman, K. P., Browell, E. V., Campos, T., Connor, B. J., Daube, B. C., Deutscher, N. M., Diao, M., Elkins, J. W., Gerbig, C., Gottlieb, E., Griffith, D. W. T., Hurst, D. F., Jim?nez, R., Keppel-Aleks, G., Kort, E. A., Macatangay, R., Machida, T., Matsueda, H., Moore, F., Morino, I., Park, S., Robinson, J., Roehl, C. M., Sawa, Y., Sherlock, V., Sweeney, C., Tanaka, T., and Zondlo, M. A. (2010), Calibration of the Total Carbon Column Observing Network using aircraft profile data, Atmos. Meas. Tech., 3, 1351-1362, doi:10.5194/amt-3-1351-2010.

Nassar, R., Jones, D. B. A., Suntharalingam, P., Chen, J. M., Andres, R. J., Wecht, K. J., Yantosca, R. M., Kulawik, S. S., Bowman, K. W., Worden, J. R., Machida, T., and Matsueda, H. (2010), Modeling global atmospheric CO2 with improved emission inventories and CO2 production from the oxidation of other carbon species, Geosci. Model Dev., 3, 689-716, doi:10.5194/gmd-3-689-2010.

Glagolev M.V., Kleptsova I.E., Filippov I.V., Kazantsev V.S., Machida T., Maksyutov S.(2010), Methane emissions from subtaiga mires of western siberia: The standard model Bc5, Moscow Univ.Soil Sci.Bull., 65(2):86-93.

Miyazaki, K., T. Machida, P. K. Patra, T. Iwasaki, Y. Sawa, H. Matsueda, and T. Nakazawa (2009), Formation mechanisms of latitudinal CO2 gradients in the upper troposphere over the subtropics and tropics, J. Geophys. Res., 114, D03306, doi:10.1029/2008JD010545

Tohjima Y., K. Katsumata, I. Morino, H. Mukai, T. Machida, I. Akama, T. Amari, U. Tsunogai (2009), Theoretical and experimental evaluation of the isotope effect of NDIR analyzer on atmospheric CO2 measurement, J. Geophys. Res., 114, D13302, doi:10.1029/2009JD011734.

Crevoisier,C., Ch?din,A., Matsueda,H., Machida,T., Armante,R., and Scott,N.A. (2009), First year of upper tropospheric integrated content of CO2 from IASI hyperspectral infrared observations, Atmos. Chem. Phys., 9, 4797-4810, doi:10.5194/acp-9-4797-2009.

Ohyama, H., I. Morino, T. Nagahama, T. Machida, H. Suto, H. Oguma, Y. Sawa, H. Matsueda, N. Sugimoto, H. Nakane, and K. Nakagawa (2009), Column-averaged volume mixing ratio of CO2 measured with ground-based Fourier transform spectrometer at Tsukuba, J. Geophys. Res., 114, D18303, doi:10.1029/2008JD011465.

Volz-Thomas, A., J-P. Cammas, C. Brenninkmeijer, T. Machida, O. Cooper, C. Sweeney, A. Waibel (2009), Civil aviation monitors air quality and climate, EM Magazine, Air & Waste Management Association, 16-19, October 2009.

Sawa, Y., T. Machida, and H. Matsueda (2008), Seasonal variations of CO2 near the tropopause observed by commercial aircraft, J. Geophys. Res., 113, D23301, doi:10.1029/2008JD010568

Machida, T., H. Matsueda, Y. Sawa, Y. Nakagawa, K. Hirotani, N. Kondo, K. Goto, T. Nakazawa, K. Ishikawa and T. Ogawa (2008) , Worldwide measurements of atmospheric CO2 and other trace gas species using commercial airlines. J. Atmos. Oceanic. Technol. 25 (10), 1744-1754, DOI: 10.1175/2008JTECHA1082.1

Matsueda, H., T. Machida, Y. Sawa, Y. Nakagawa, K. Hirotani, H. Ikeda, N. Kondo and K. Goto (2008), Evaluation of atmospheric CO2 measurements from new flask air sampling of JAL airliner observation. Pap. Meteorolo. Geophys. 59, 1-17

Takahashi, Y., N. Liang, R. Hirata, T. Machida, and Y. Fujinuma (2008), Variability in carbon stable isotope ratio of heterotrophic respiration in a deciduous needle-leaf forest, J. Geophys. Res., 113, G01022, doi:10.1029/2007JG000478

Uchida, M., M. Kondo, Y. Nojiri, H. Mukai, S. Murayama, T. Machida, H. Koizumi, N. Ogura, Y. Ambe (2008), Ecosystem-scale carbon isotope ratio of respired CO2 in cool-temperate deciduous forests under Asian Monsoon climate. J. Geophys. Res., 113, G02015, doi:10.1029/2007JG000574

Ishidoya, S., S. Morimoto, S. Sugawara, T. Watai, T. Machida, S. Aoki, T. Nakazawa, and T. Yamanouchi (2008), Gravitational separation suggested by O2/N2, ð15N of N2, ð18O of O2, Ar/N2 observed in the lowermost part of the stratosphere at northern middle and high latitudes in the early spring of 2002, Geophys. Res. Lett., 35, L03812, doi:10.1029/2007GL031526

Tohjima, Y., H. Mukai, Y. Nojiri, H. Yamagishi, T. Machida (2008), Atmospheric O2/N2 measurements at two Japanese sites: estimation of global oceanic and land biotic carbon sinks and analysis of the variations in atmospheric potential oxygen (APO), Tellus B, 60 (2) , 213-225 doi:10.1111/j.1600-0889.2007.00334.x

Gloor M., E. Dlugokencky, C. Brenninkmeijer, L. Horowitz, D. F. Hurst, G. Dutton, C. Crevoisier, T. Machida, P. Tans (2007), Three-dimensional SF6 data and tropospheric transport simulations: Signals, modeling accuracy, and implications for inverse modeling, J. Geophys. Res., 112, D15112, doi:10.1029/2006JD007973

Peylin P., F. M. Bréon, S. Serrar, Y. Tiwari, A. Chédin, M. Gloor, T. Machida, C. Brenninkmeijer, A. Zahn, P. Ciais (2007), Evaluation of Television Infrared Observation Satellite (TIROS-N) Operational Vertical Sounder (TOVS) spaceborne CO2 estimates using model simulations and aircraft data, J. Geophys. Res., 112, D09313, doi:10.1029/2005JD007018

Stephens, B. B., K. R. Gurney, P. P. Tans, C. Sweeney, W. Peters, L. Bruhwiler, P. Ciais, M. Ramonet, P. Bousquet, T. Nakazawa, S. Aoki, T. Machida, G. Inoue, N. Vinnichenko. J. Lloyd, A. Jordan, M. Heimann, O. Shibistova, R. Langenfelds, L. P. Steele, R. J. Francey, and A. S. Denning, 2007: Weak northern and strong tropical land carbon uptake from vertical profiles of atmospheric CO2. Science, 316, 1732-1735

Barkley, M. P., Monks, P. S., Hewitt, A. J., Machida, T., Desai, A., Vinnichenko, N., Nakazawa, T., Yu Arshinov, M., Fedoseev, N., and Watai, T.: Assessing the near surface sensitivity of SCIAMACHY atmospheric CO2 retrieved using (FSI) WFM-DOAS, Atmos. Chem. Phys., 7, 3597-3619, 2007

T. Watai, T. Machida, N. Ishizaki and G. Inoue. A lightweight observation system for atmospheric carbon dioxide concentration using a small unmanned aerial vehicle. Journal of Atmospheric and Oceanic Technology, Vol.23, No.5, 700-710, 2006

M. K. Ejiri, Y. Terao, T. Sugita, H. Nakajima, T. Yokota, G.. C. Toon, B. Sen, G. Wetzel, H. Oelhaf, J. Urban, D. Murtagh, H. Irie, N. Saitoh, T. Tanaka, H. Kanzawa, M. Shiotani, S. Aoki, G. Hashida, T. Machida, T. Nakazawa, H. Kobayashi, and Y. Sasano. Validation of the Improved Limb Atmospheric Spectrometer-II (ILAS-II) Version 1.4 nitrous oxide and methane profiles, J. Geophys. Res., 111, D22S90, doi:10.1029/2005JD006449, 2006

Tohjima, Y., T. Machida, T. Watai, I. Akama, T. Amari and Y. Moriwaki. Preparation of Gravimetric Standards for Measurements of Atmospheric Oxygen and Re-evaluation of Atmospheric Oxygen Concentration. J. Geophys. Res. 110, D11302, doi:10.1029/2004JD005595, 2005

Tohjima Y, Mukai H, Machida T, No jiri Y, Gloor M. First measurements of the latitudinal atmospheric O2 and CO2 distributions across the western Pacific. Geophys. Res. Lett. 32 (17): Art. No. L17805, 2005

S. Toyoda, N. Yoshida, T. Urabe, Y. Nakayama, T. Suzuki, K. Tsuji, K. Shibuya, S. Aoki, T. Nakazawa, S. Ishidoya, K. Ishijima, S. Sugawara, T. Machida, G.Hashida, S. Morimoto, and H. Honda. Temporal and latitudinal distributions of stratospheric N2O isotopomers. J. Geophys. Res. 109 (D8): Art. No. D08308, 2004

Takegawa N, Kondo Y, Koike M, Chen G, Machida T, Watai T, Blake DR, Streets DG, Woo JH, Carmichael GR, Kita K, Miyazaki Y, Shirai T, Liley JB, Ogawa T. Removal of NOx and NOy in Asian outflow plumes: Aircraft measurements over the western Pacific in January 2002. J. Geophys. Res. 109 (D23): Art. No. D23S04, 2004

Machida, T., K. Kita, Y. Kondo, D. Blake, S. Kawakami, G. Inoue and T. Ogawa, Vertical and meridional distributions of atmospheric CO2 mixing ratio between northern mid latitudes and southern subtropics, J. Geophys. Res., 108(D3), 8401, 10.1029/2001JD000910, 2003

Shirai, T., Blake, D.R., Meinardi, S., Rowland, F.S., Russell-Smith, J., Edwards, A., Kondo, Y., Koike, M., Kita, K., Machida, T., Takegawa, N., Nishi, N., Kawakami, S., and Ogawa, T., Emission estimates of selected volatile organic compounds from tropical savanna burning in northern Australia, J. Geophys. Res., 108(D3), 8406, doi:10.1029/2001JD000841, 2003

Aoki, S., Nakazawa, T., Machida, T., Sugawara, S., Morimoto, S., Hashida, G., Yamanouchi, T., Kawamura, K. & Honda, H., Carbon dioxide variations in the stratosphere over Japan, Scandinavia and Antarctica., Tellus B 55 (2), 178-186. doi: 10.1034/j.1600-0560.2003.00059. 2003

Maksyutov, S., T. Machida, H. Mukai, P. Patra, T. Nakazawa, G. Inoue, & Modelers, TRANSCOM-3, Effect of recent observations on Asian CO2 flux estimates by transport model inversions. Tellus B 55 (2), 522-529. doi: 10.1034/j.1600-0560.2003.00052. 2003

Tohjima, Y., H. Mukai, T. Machida and Y. Nojiri, Gas-chromatographic measurements of the atmospheric oxygen/nitrogen ratio at Hateruma Island and Cape Ochi-ishi, Japan. Geophys. Res. Lett., 30, 1653. doi:10.1029/2003GL017282, 2003

Morimoto, S., T. Watai, T. Machida, M. Wada and T. Yamanouchi, In-situ measurement of the ozone concentration in the Arctic Airbone Measurement Program 2002 (AAMP02). Polar Meteorol. Glaciol., 17, 81-93, 2003

T. Yamanouchi, M. Wada, M. Shiobara, S. Morimoto, Y. Asuma, S. Yamagata, T. Yamazaki, S. Ishidoya, T. Kawahara, M. Yabuki, Y. Inomata, A. Herber, J. Graeser, K. Hara, N. Hirasawa, S. Aoki, S. Sugawara, T. Machida, T. Watai, and R Treffeisen, Preliminary report of “Arctic Airbone measurement Program 2002” (AAMP2002). Polar Meteorol. Glaciol., 17, 103-115, 2003

Y. Inomata, Y. Iwasaka, S. Morimoto, M. Shiobara, T. Machida, and S. Sugawara. Carbonyl Sulfide Concentration in the arctic lowermost Stratosphere and Stratosphere-troposphere Transport. Journal of the Meteorological Society of Japan, 81 (6), 1471-1484, 2003

Kita, K.; Kawakami, S.; Miyazaki, Y.; Higashi, Y.; Kondo, Y.; Nishi, N.; Koike, M.; Blake, D. R.; Machida, T.; Sano, T.; Hu, W.; Ko, M.; Ogawa, T., Photochemical production of ozone in the upper troposphere in association with cumulus convection over Indonesia, J. Geophys. Res. 108(D3), 10.1029/2001JD000844, 2003

Liley, J. Ben; Baumgardner, D.; Kondo, Y.; Kita, K.; Blake, D. R.; Koike, M.; Machida, T.; Takegawa, N.; Kawakami, S.; Shirai, T.; Ogawa, J. Geophys. Res. T., Black carbon in aerosol during BIBLE B, 108(D3), 10.1029/2001JD000845, 2003

Tohjima, Y., T. Machida, M. Utiyama, M. Katsumoto, Y. Fujinuma and S. Maksyutov, Analysis and presentation of in situ atmospheric methane measurements from Cape Ochi-ishi and Hateruma Island, Japan, J. Geophys. Res., 107(D12), 10.1029/2001JD001003, 2002

Mukai H., T. Machida, A. Tanaka, Yelpatievskiy P. Vera, M. Uematsu, Lead isotope ratios in the urban air of eastern and central Russia, Atmospheric Environment, 2783-2793, 2001

Y. Yokouchi, Y. Nojiri, L.A. Barrie, D. Toom-Sauntry, T. Machida, Y. Inuzuka, H. Akimoto, H.-J. Li, Y. Fujinuma and S. Aoki, A strong source of methyl chloride to the atmosphere from tropical costal land. Nature 403, 295-298, 2000

Y. Yokouchi, T. Machida, L.A. Barrie, D. Toom-Sauntry, Y. Nojiri, Y. Fujinuma, Y. Inuzuka, H.-J. Li, H. Akimoto and S. Aoki, Latitudinal distribution of atmospheric methyl bromide: measurements and modeling. Geophys. Res. Lett. 27, 697-700, 2000

H. Honda, N. Yajima, T. Yamagami, S. Aoki, G. Hashida, T. Machida and S. Morimoto, Balloon operation for stratospheric air sampling at Antarctica. Adv. Space Res. 26, 1369-1372, 2000

Tohjima, Y., H. Mukai, S. Maksyutov, Y. Takahashi, T. Machida, M. Katsumoto and Y. Fujinuma, Variations in atmospheric nitrous oxide observed at Hateruma monitoring station. Chemosphere - Global Change Science, 2, 435-443, 2000

Kawamura, K., T. Nakazawa, T. Machida, S. Morimoto, S. Aoki, M. Ishizawa, Y. Fujii and O. Watanabe, Variations of the carbon isotopic ratio in atmospheric CO2 over the 250 years recorded in an ice core from H15, Antarctica. Polar Meteorol. Glaciol., 14, 47-57, 2000

Y. Yokouchi, H-J Li, T. Machida S. Aoki and H. Akimoto, Isoprene in the marine boundary layer (Southeast Asian Sea, eastern Indian Ocean and Southern Ocean): Comparison with dimethyl sulfide and bromoform. J. Geophys. Res. 104, 8067-8076, 1999

N. Yajima, H. Honda, S. Aoki, G. Hashida, S. Morimoto, T. Machida and S. Okano, Improved scientific ballooning applied to the cryo-sampling experiment at Syowa Station. Adv. Polar Upper Atmos. Res. 13, 167-175, 1999

M. Shiobara, Y. Fujii, S. Morimoto, Y. Asuma, S. Yamagata, S. Sugawara, Y. Inomata, M. Watanabe and T. Machida, An overview and preliminary results from the Arctic airborne measurement program 1998 campaign. Polar Meteorol. Glaciol. 13, 99-110, 1999


T. Nakazawa, S. Sugawara, G. Inoue, T. Machida, S. Maksyutov and H. Mukai, Aircraft measurements of the concentrations of CO2, CH4, N2O and CO and the carbon and oxygen isotopic ratios of CO2 in the tropospheric over Russia. J. Geophys. Res. 102, 3843-3859, 1997

S. Sugawara, T. Nakazawa, Y. Shirakawa, K. Kawamura, S. Aoki, T. Machida and H. Honda, Vertical profiles of the carbon isotopic ratio of stratospheric methane over Japan. Geophys. Res. Lett., 24, 2989-2992, 1997

Y. Tohjima, H. Wakita, S. Maksyutov, T. Machida, G. Inoue, N. Vinnichenko and V. Khattatov. Distribution of tropospheric methane over Siberia in July 1993. J. Geophys. Res. 102, 25371-25382, 1997

T. Machida, T. Nakazawa, H. Narita, Y. Fujii, S. Aoki and O. Watanabe, Variations of the CO2, CH4 and N2O concentrations and δ13C of CO2 in the glacial period deduced from an Antarctic ice core, South Yamato. Proc. NIPR Symp. Polar Meteorol. Glaciol. 10, 55-65, 1996

S. Sugawara, T. Nakazawa, G. Inoue, T. Machida, H. Mukai, N.K. Vinnichenko and V.U. Khattatov, Aircraft measurements of the stable carbon isotopic ratio of atmospheric methane over Siberia. Global Biogeochem. Cycles. 10, 223-231, 1996

Y. Tohjima, S. Maksyutov, T. Machida and G. Inoue, Airbone measurements of atmospheric methane over oil fields in western Siberia. Geophys. Res. Lett. 23, 1621-1624, 1996

T. Machida, T. Nakazawa, Y. Fujii, S. Aoki, and O. Watanabe, Increase in the atmospheric nitrous oxide concentration during the last 250 years. Geophys. Res. Lett. 21, 2921-2924, 1995

T. Gamo, M. Tsutsumi, H. Sakai, T. Nakazawa, T. Machida, H. Honda, and T. Ito, Long-term monitoring of the carbon and oxigen isotope ratios of stratospheric CO2 over Japan. Geophys. Res. Lett. 22, 397-400, 1995

T. Nakazawa, T. Machida, S. Sugawara, S. Murayama, S. Morimoto, G. Hashida, H. Honda, and T. Ito. Measurements of the stratospheric carbon dioxide concentration over Japan using a baloon-bone cryogenic sampler. Geophys. Res. Lett. 22, 1229-1232, 1995

T. Nakamura, T. Nakazawa, H. Honda, H. Kitagawa, T. Machida, A. Ikeda, and E. Matsumoto. Seasonal variations in 14C concentrations of stratospheric CO2 measured with accelerator mass spectrometry. Nucl. Instr. and Meth. B92, 413-416, 1994

T. Nakazawa, T. Machida, M. Tanaka, Y. Fujii, S. Aoki, and O. Watanabe. Measurements of CO2 and CH4 concentrations of air in polar ice core. J. Glaciol. 39, 209-215, 1993

T. Nakazawa, T. Machida, M. Tanaka, Y. Fujii, S. Aoki, and O. Watanabe. Differences of the atmospheric CH4 concentration between the Arctic and Antarctic regions in pre-industrial/pre-agricultural era. Geophys. Res. Lett. 20, 943-946, 1993


T. Nakamura, T. Nakazawa, N. Nakai, H. Kitagawa, H. Honda, T. Ito, T. Machida, and E. Matsumoto. Measurements of 14C concentrations of Atmospheric CO2 by accelerator mass spectrometry. Radiocarbon 34, 745-752, 1992


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