Zobrazeno 1 - 10
of 290
pro vyhledávání: '"K. Ishijima"'
Publikováno v:
Atmospheric Chemistry and Physics, Vol 24, Pp 1059-1077 (2024)
Continuous observations of atmospheric δ(O2/N2) and CO2 amount fractions have been carried out at Ryori (RYO), Japan, since August 2017. In these observations, the O2 : CO2 exchange ratio (ER, -Δy(O2)Δy(CO2)-1) has frequently been lower than expec
Externí odkaz:
https://doaj.org/article/fb0e155fa9ee48a48b97eff003e8e49c
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 6953-6970 (2022)
We analyzed air samples collected on board a C-130 cargo aircraft over the western North Pacific from May 2012 to March 2020 for atmospheric δ(O2 / N2) and CO2 amount fraction. Observations were corrected for significant artificial fractionation of
Externí odkaz:
https://doaj.org/article/75ecca9d4cac4e47830172c4d721b314
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 1357-1373 (2021)
Systematic measurements of the atmospheric Ar∕N2 ratio have been made at ground-based stations in Japan and Antarctica since 2012. Clear seasonal cycles of the Ar∕N2 ratio with summertime maxima were found at middle- to high-latitude stations, wi
Externí odkaz:
https://doaj.org/article/5dde2f3ebaf846dd83055a3137e2a268
Autor:
S. Toyoda, N. Yoshida, S. Morimoto, S. Aoki, T. Nakazawa, S. Sugawara, S. Ishidoya, M. Uematsu, Y. Inai, F. Hasebe, C. Ikeda, H. Honda, K. Ishijima
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 833-844 (2018)
Vertical profiles of nitrous oxide (N2O) and its isotopocules, isotopically substituted molecules, were obtained over the Equator at altitudes of 16–30 km. Whole air samples were collected using newly developed balloon-borne compact cryogenic sa
Externí odkaz:
https://doaj.org/article/d8a55970317942758e53664a7b55ee6a
Autor:
M. Prokopiou, P. Martinerie, C. J. Sapart, E. Witrant, G. Monteil, K. Ishijima, S. Bernard, J. Kaiser, I. Levin, T. Blunier, D. Etheridge, E. Dlugokencky, R. S. W. van de Wal, T. Röckmann
Publikováno v:
Atmospheric Chemistry and Physics, Vol 17, Iss 7, Pp 4539-4564 (2017)
N2O is currently the third most important anthropogenic greenhouse gas in terms of radiative forcing and its atmospheric mole fraction is rising steadily. To quantify the growth rate and its causes over the past decades, we performed a multi-site rec
Externí odkaz:
https://doaj.org/article/4741aab3e6af4dad90f89681c4118740
Autor:
A. Ghosh, P. K. Patra, K. Ishijima, T. Umezawa, A. Ito, D. M. Etheridge, S. Sugawara, K. Kawamura, J. B. Miller, E. J. Dlugokencky, P. B. Krummel, P. J. Fraser, L. P. Steele, R. L. Langenfelds, C. M. Trudinger, J. W. C. White, B. Vaughn, T. Saeki, S. Aoki, T. Nakazawa
Publikováno v:
Atmospheric Chemistry and Physics, Vol 15, Iss 5, Pp 2595-2612 (2015)
Atmospheric methane (CH4) increased from ~900 ppb (parts per billion, or nanomoles per mole of dry air) in 1900 to ~1800 ppb in 2010 at a rate unprecedented in any observational records. However, the contributions of the various methane sources and s
Externí odkaz:
https://doaj.org/article/162480c7e17a46f295daf7693abee4f8
Autor:
R. L. Thompson, K. Ishijima, E. Saikawa, M. Corazza, U. Karstens, P. K. Patra, P. Bergamaschi, F. Chevallier, E. Dlugokencky, R. G. Prinn, R. F. Weiss, S. O'Doherty, P. J. Fraser, L. P. Steele, P. B. Krummel, A. Vermeulen, Y. Tohjima, A. Jordan, L. Haszpra, M. Steinbacher, S. Van der Laan, T. Aalto, F. Meinhardt, M. E. Popa, J. Moncrieff, P. Bousquet
Publikováno v:
Atmospheric Chemistry and Physics, Vol 14, Iss 12, Pp 6177-6194 (2014)
This study examines N2O emission estimates from five different atmospheric inversion frameworks based on chemistry transport models (CTMs). The five frameworks differ in the choice of CTM, meteorological data, prior uncertainties and inversion method
Externí odkaz:
https://doaj.org/article/40d646cf886f45138dbcd4cb9d469d9a
Autor:
E. Saikawa, R. G. Prinn, E. Dlugokencky, K. Ishijima, G. S. Dutton, B. D. Hall, R. Langenfelds, Y. Tohjima, T. Machida, M. Manizza, M. Rigby, S. O'Doherty, P. K. Patra, C. M. Harth, R. F. Weiss, P. B. Krummel, M. van der Schoot, P. J. Fraser, L. P. Steele, S. Aoki, T. Nakazawa, J. W. Elkins
Publikováno v:
Atmospheric Chemistry and Physics, Vol 14, Iss 9, Pp 4617-4641 (2014)
We present a comprehensive estimate of nitrous oxide (N2O) emissions using observations and models from 1995 to 2008. High-frequency records of tropospheric N2O are available from measurements at Cape Grim, Tasmania; Cape Matatula, American Samoa; Ra
Externí odkaz:
https://doaj.org/article/4b8ef0e2cfcb4c7cbf2e7bbe0a6ec71e
Autor:
R. L. Thompson, P. K. Patra, K. Ishijima, E. Saikawa, M. Corazza, U. Karstens, C. Wilson, P. Bergamaschi, E. Dlugokencky, C. Sweeney, R. G. Prinn, R. F. Weiss, S. O'Doherty, P. J. Fraser, L. P. Steele, P. B. Krummel, M. Saunois, M. Chipperfield, P. Bousquet
Publikováno v:
Atmospheric Chemistry and Physics, Vol 14, Iss 8, Pp 4349-4368 (2014)
We present a comparison of chemistry-transport models (TransCom-N2O) to examine the importance of atmospheric transport and surface fluxes on the variability of N2O mixing ratios in the troposphere. Six different models and two model variants partici
Externí odkaz:
https://doaj.org/article/e8c25c973b814b5cabadc34af0ff2580
Autor:
R. L. Thompson, F. Chevallier, A. M. Crotwell, G. Dutton, R. L. Langenfelds, R. G. Prinn, R. F. Weiss, Y. Tohjima, T. Nakazawa, P. B. Krummel, L. P. Steele, P. Fraser, S. O'Doherty, K. Ishijima, S. Aoki
Publikováno v:
Atmospheric Chemistry and Physics, Vol 14, Iss 4, Pp 1801-1817 (2014)
N2O surface fluxes were estimated for 1999 to 2009 using a time-dependent Bayesian inversion technique. Observations were drawn from 5 different networks, incorporating 59 surface sites and a number of ship-based measurement series. To avoid biases i
Externí odkaz:
https://doaj.org/article/fc9f8dd8d8094dc5bb3853d1858d301e