S. Sugawara

发表

Variations of tropospheric methane over Japan during 1988–2010

P. Patra, T. Umezawa, D. Goto, 2014 .

Vertical profile of the carbon isotopic ratio of stratospheric methane over Japan

T. Machida, S. Aoki, S. Sugawara, 1997 .

Concentration variations of tropospheric nitrous oxide over Japan

T. Saeki, S. Aoki, K. Ishijima, 2001 .

Reconstruction of the atmospheric CO 2 concentration history from an Antarctic deep ice core , Dome Fuji using a wet extraction technique : analysis procedures , dating of air in ice and concentration variations

K. Kawamura, S. Aoki, S. Sugawara, 2003 .

New technique for high-precision, simultaneous measurements of CH4, N2O and CO2 concentrations; isotopic and elemental ratios of N2, O2 and Ar; and total air content in ice cores by wet extraction

R. Beaudette, J. Severinghaus, K. Kawamura, 2020, Atmospheric Measurement Techniques.

New technique for high-precision, simultaneous measurements of CH4, N2O and CO2 concentrations; isotopic and elemental ratios of N2, O2 and Ar; and total air content in ice cores by wet extraction

R. Beaudette, J. Severinghaus, K. Kawamura, 2020, Atmospheric Measurement Techniques.

Convective mixing of air in firn at four polar sites

J. Severinghaus, K. Kawamura, S. Aoki, 2006 .

Atmospheric CO2 variations over the last three glacial’interglacial climatic cycles deduced from the Dome Fuji deep ice core, Antarctica using a wet extraction technique

K. Kawamura, S. Aoki, S. Sugawara, 2003 .

Temporal and latitudinal distributions of stratospheric N2O isotopomers

T. Machida, S. Aoki, K. Ishijima, 2004 .

Gravitational separation of major atmospheric components of nitrogen and oxygen in the stratosphere

S. Aoki, S. Sugawara, S. Morimoto, 2008 .

Vertical profiles of the O2/N2 ratio in the stratosphere over Japan and Antarctica

S. Aoki, S. Sugawara, S. Morimoto, 2006 .

Fractionation of N2O isotopomers in the stratosphere

S. Aoki, S. Sugawara, T. Nakazawa, 2001 .

Three-dimensional simulation of stratospheric gravitational separation using the NIES global atmospheric tracer transport model

Shamil Maksyutov, D. Belikov, S. Aoki, 2018, Atmospheric Chemistry and Physics.

Carbonyl Sulfide Concentration in the Arctic Lowermost Stratosphere and Stratosphere-troposphere Transport

T. Machida, M. Shiobara, Y. Inomata, 2003 .

In-situ measurement of the atmospheric CO concentration at Syowa Station, Antarctica

S. Aoki, S. Sugawara, S. Morimoto, 2002 .

Aircraft measurements of the stable carbon isotopic ratio of atmospheric methane over Siberia

T. Machida, G. Inoue, S. Sugawara, 1996 .

Secular change in atmospheric Ar∕N2 and its implications for ocean heat uptake and Brewer–Dobson circulation

Y. Niwa, Y. Tohjima, S. Murayama, 2020, Atmospheric Chemistry and Physics.

Towards reconstructing the Arctic atmospheric methane history over the 20th century: measurement and modelling results for the North Greenland Ice Core Project firn

K. Kawamura, T. Umezawa, S. Aoki, 2022, Atmospheric Chemistry and Physics.

Towards reconstructing the Arctic atmospheric methane history over the 20th century: measurement and modeling results for the NGRIP firn

K. Kawamura, T. Umezawa, S. Aoki, 2021 .

Reconstruction of past atmospheric CH 4 concentration from the firn air data at Dome Fuji

K. Kawamura, S. Aoki, S. Sugawara, 2003 .

Vertical Profiles and Temporal Variations of Greenhouse Gases in the Stratosphere over Syowa Station, Antarctica

D. Goto, S. Aoki, S. Sugawara, 2017 .

Gravitational separation in the stratosphere – a new indicator of atmospheric circulation

S. Murayama, S. Aoki, S. Sugawara, 2013 .

Composition of firn air collected at H128, a coastal site in East Antarctica

K. Kawamura, S. Aoki, S. Sugawara, 2018 .

Gravitational separation suggested by O2/N2, δ15N of N2, δ18O of O2, Ar/N2 observed in the lowermost part of the stratosphere at northern middle and high latitudes in the early spring of 2002

T. Machida, T. Watai, S. Aoki, 2008 .

Application of a Nudged General Circulation Model to the Interpretation of the Mean Age of Air Derived from Stratospheric Samples in the Tropics

K. Ishijima, S. Sugawara, F. Hasebe, 2021 .

Airborne measurements of greenhouse gases during AAMP98

S. Aoki, S. Sugawara, S. Morimoto, 2002 .

Seasonal variation of the oxygen isotopic ratio of atmospheric carbon dioxide in a temperate forest, Japan

M. Ishizawa, S. Aoki, S. Sugawara, 2004 .

Temporal variations of the atmospheric nitrous oxide concentration and its δ15N and δ18O for the latter half of the 20th century reconstructed from firn air analyses

K. Kawamura, S. Murayama, S. Aoki, 2007 .

Temporal variations of atmospheric carbon dioxide in the southernmost part of Japan

Shamil Maksyutov, M. Ishizawa, S. Nakaoka, 2007 .

Age of stratospheric air unchanged within uncertainties over the past 30 years

E. Atlas, S. Schauffler, A. Andrews, 2009 .

Aircraft measurements of the concentrations of CO2, CH4, N2O, and CO and the carbon and oxygen isotopic ratios of CO2 in the troposphere over Russia

T. Machida, G. Inoue, S. Sugawara, 1997 .

Coordinated Upper-Troposphere-to-Stratosphere Balloon Experiment in Biak

M. Hayashi, S. Aoki, S. Sugawara, 2018, Bulletin of the American Meteorological Society.

Variations in global methane sources and sinks during 1910–2010

Kenji Kawamura, Prabir K. Patra, James W. C. White, 2014 .

Transport model diagnosis of the mean age of air derived from stratospheric samples in the tropics

K. Ishijima, S. Sugawara, F. Hasebe, 2020 .

Age and gravitational separation of the stratospheric air over Indonesia

S. Aoki, S. Sugawara, S. Morimoto, 2017 .

Improving stratospheric transport trend analysis based on SF6 and CO2 measurements

C. Sweeney, E. Ray, P. Tans, 2014 .

Temporal and spatial variations of carbon monoxide over the western part of the Pacific Ocean

K. Sudo, H. Yashiro, S. Aoki, 2009 .

Gravitational separation of the stratospheric air over Syowa, Antarctica and its connection with meteorological fields

T. Machida, D. Goto, S. Aoki, 2018, Atmospheric Science Letters.

Carbon dioxide variations in the stratosphere over Japan, Scandinavia and Antarctica

S. Aoki, S. Sugawara, S. Morimoto, 2003 .

Measurements of the stratospheric carbon dioxide concentration over Japan using a Balloon‐borne cryogenic sampler

Hideyuki Honda, Shinji Morimoto, Toshinobu Machida, 1995 .

Balloon-borne tropospheric CO2 observations over the equatorial eastern and western Pacific

M. Uematsu, S. Aoki, S. Sugawara, 2018, Atmospheric Environment.

A New Compact Cryogenic Air Sampler and Its Application in Stratospheric Greenhouse Gas Observation at Syowa Station, Antarctica

S. Aoki, S. Sugawara, S. Morimoto, 2009 .

Vertical distributions of N 2 O isotopocules in the equatorial stratosphere

M. Uematsu, S. Aoki, K. Ishijima, 2017 .

Variations of stratospheric trace gases measured using a balloon-borne cryogenic sampler

Kenji Kawamura, Hideyuki Honda, Naohiro Yoshida, 2002 .

Inter-comparison of stratospheric mean-meridional circulation and eddy mixing among six reanalysis data sets

Toshiki Iwasaki, Michaela I. Hegglin, Satoshi Sugawara, 2015 .

Reconstruction of past variations of 13C in atmospheric CO2 from its vertical distribution observed in the firn at Dome Fuji, Antarctica

S. Aoki, S. Sugawara, T. Nakazawa, 2003 .

OBSERVATIONS OF ATMOSPHERIC CO 2 CONCENTRATION AND ITS CARBON ISOTOPIC RATIO IN CHINA

M. Ishizawa, T. Saeki, S. Aoki, 2005 .