Latest Update：2024/08/31 11:05:12

UMEZAWA Taku

Researcher Name: UMEZAWA Taku

Div (Section) name/title: Earth System Division（Biogeochemical Cycle Observation Section）／Senior Researcher

Research Subject: Studies on atmospheric trace gas variations and isotope measurements

Degree(s): Ph.D

Professional Qualification(s): Science,Earth Science,Physics

Environmental Speciality Field: atmospheric chemistry,greenhouse gas,carbon cycle

Research Subject

Fiscal Year: 2024
- 26799 : Climate Change and Air Quality Research Program
- 26815 : Quantitative evaluation of natural and anthropogenic sinks and sources of greenhouse gases at global scale
- 26816 : Quantitative evaluation of anthropogenic sources of SLCFs and greenhouse gases at region, country and city　scale
- 26859 : Earth System Domain: Foresight and Advanced Basic Research
- 26912 : Developing the techniques for environmental analyses using the accelerator mass spectrometry
- 27006 : Characterizing urban methane sources in the two Japanese megacities: Tokyo and Osaka
- 27007 : Have the stratospheric circulation changed for the last 30 years? —Estimation from new halocarbon measurements—
Fiscal Year: 2023
- 26400 : Climate Change and Air Quality Research Program
- 26409 : Quantitative evaluation of natural and anthropogenic sinks and sources of greenhouse gases at global scale
- 26410 : Quantitative evaluation of anthropogenic sources of SLCFs and greenhouse gases at region, country and city　scale
- 26450 : Earth System Domain: Foresight and Advanced Basic Research
- 26479 : Observation of the atmospheric GHGs by using ground sites and aircraft
- 26564 : Characterizing urban methane sources in the two Japanese megacities: Tokyo and Osaka
- 26565 : Have the stratospheric circulation changed for the last 30 years? —Estimation from new halocarbon measurements—
- 26651 : Development of a greenhouse gas monitoring system from city to global scales using commercial airliners
Fiscal Year: 2022
- 25964 : Climate Change and Air Quality Research Program
- 25965 : Quantitative evaluation of natural and anthropogenic sinks and sources of greenhouse gases at global scale
- 25966 : Quantitative evaluation of anthropogenic sources of SLCFs and greenhouse gases at region, country and city　scale
- 26006 : Earth System Domain: Foresight and Advanced Basic Research
- 26067 : Source sampling and stable carbon isotope measurements from various methane source categories in South Asia and Southeast Asia
- 26095 : Observation of the atmospheric GHGs by using ground sites and aircraft
- 26266 : Development of a greenhouse gas monitoring system from city to global scales using commercial airliners
- 26392 : Characterizing urban methane sources in the two Japanese megacities: Tokyo and Osaka
Fiscal Year: 2021
- 25498 : Climate Change and Air Quality Research Program
- 25506 : Quantitative evaluation of natural and anthropogenic sinks and sources of greenhouse gases at global scale
- 25507 : Quantitative evaluation of anthropogenic sources of SLCFs and greenhouse gases at region, country and city　scale
- 25624 : Estimation of regional-global methane emissions and refinement of its estimate by GOSAT-2 and surface observations
- 25655 : Earth System Domain: Foresight and Advanced Basic Research
- 25819 : An integrated GHG top-down analysis for Asia using multi-species aircraft observations
- 25856 : Source sampling and stable carbon isotope measurements from various methane source categories in South Asia and Southeast Asia
- 25875 : Development of a greenhouse gas monitoring system from city to global scales using commercial airliners
- 25929 : Observation of the atmospheric GHGs by using ground sites and aircraft
Fiscal Year: 2020
- 25128 : Study on Multi-scale Evaluation System for GHG Variation and Mitigation
- 25185 : Development of a novel high-precision preparation method for standard gases of atmospheric carbonyl sulfide as a new tracer for carbon cycle studies
- 25282 : Estimation of regional-global methane emissions and refinement of its estimate by GOSAT-2 and surface observations
- 25336 : Source sampling and stable carbon isotope measurements from various methane source categories in South Asia and Southeast Asia
- 25373 : An integrated GHG top-down analysis for Asia using multi-species aircraft observations
- 25412 : Long-term 3D observation of greenhouse gases by commercial airliner and its data distribution system
Fiscal Year: 2019
- 24708 : Study on Multi-scale Evaluation System for GHG Variation and Mitigation
- 24772 : Development of a monitoring and evaluation system of the methane bdget for different source categories in East Asia toward intended emission reduction
- 24804 : Development of an integrated observation and analysis system for monitoring greenhouse gas sources and sinks
- 24939 : Reconstruction of atmospheric variations of methane isotopes over the last 50 years using measurements of halocarbons in firn air samples
- 24992 : Estimation of regional-global methane emissions and refinement of its estimate by GOSAT-2 and surface observations
- 25077 : Development of a novel high-precision preparation method for standard gases of atmospheric carbonyl sulfide as a new tracer for carbon cycle studies
Fiscal Year: 2018
- 24291 : Study on multi-scale evaluation system for GHG variation and mitigation
- 24417 : Estimation of Regional-Global Methane Emissions and Refinement of Its Estimate by GOSAT-2 and Surface Observations
- 24441 : Development of an integrated observation and analysis system for monitoring greenhouse gas sources and sinks
- 24473 : Development of a Monitoring and Evaluation System of the Methane Budget for Different Source Categories in East Asia toward Intended Emission Reduction
- 24478 : Reconstruction of atmospheric variations of methane isotopes over the last 50 years using measurements of halocarbons in firn air samples
Fiscal Year: 2017
- 23923 : Development of a Monitoring and Evaluation System of the Methane Budget for Different Source Categories in East Asia toward Intended Emission Reduction
- 24034 : Reconstruction of atmospheric variations of methane isotopes over the last 50 years using measurements of halocarbons in firn air samples
- 24163 : Development of an integrated observation and analysis system for monitoring greenhouse gas sources and sinks
Fiscal Year: 2016
- 23678 : Integrated observation and analysis system for early detection of carbon cycle change globally and in Asia-Pacific region
Fiscal Year: 2015
- 23224 : Integrated observation and analysis system for early detection of carbon cycle change globally and in Asia-Pacific region

View all

Research Result (Publication)

all
Original Paper
Other Publications

Original Paper
Methane emissions decreased in fossil fuel exploitation and sustainably increased in microbial source sectors during 1990-2020

Presenter : Chandra N., Patra P.K., Fujita R., Hoglund-Isaksson L., Umezawa T., Goto D., Morimoto S., Vaughn B.H., Rockmann T.
Title : , Communications Earth & Environment, 5(147): (2024)
Original Paper
Bottom-Up Evaluation of the Methane Budget in Asia and Its Subregions

Presenter : Ito A., Patra P.K., Umezawa T.
Title : , Global Biogeochemical Cycles, 37(e2023GB007723):1-25 (2023)
Original Paper
Towards reconstructing the Arctic atmospheric methane history over the 20th century: measurement and modelling results for the North Greenland Ice Core Project firn

Presenter : Umezawa T., Sugawara S., Kawamura K., Oyabu I., Andrews S. J., Saito T., Aoki S., Nakazawa T.
Title : , Atmospheric Chemistry and Physics, 22:6899-6917 (2022)
Original Paper
Emissions from the Oil and Gas Sectors, Coal Mining and Ruminant Farming Drive Methane Growth over the Past Three Decades

Presenter : Naveen C., Patra P.K., Bisht J.S.H., Ito A., Umezawa T., Saigusa N., Morimoto S., Aoki S., Janssens-Maenhout G.
Title : , Journal of the Meteorological Society of Japan, 99(2):309-337 (2021)
Original Paper
Estimation of fire-induced carbon emissions from Equatorial Asia in 2015 using in situ aircraft and ship observations

Presenter : Niwa Y., Sawa Y., Nara H., Machida T., Matsueda H., Umezawa T., Ito A., Nakaoka S., Tanimoto H., Tohjima Y.
Title : , Atmospheric Chemistry and Physics, 21:9455-9473 (2021)
Other Publications
Composition of firn air at the North Greenland Ice Core Project (NGRIP) site

Presenter : Kawamura K., Umezawa T., Sugawara S., Ishidoya S., Ishijima K., Saito T., Oyabu I., Murayama S., Morimoto S., Aoki S., Nakazawa T.
Title : , Polar Data Journal, 5:89-98 (2021)
Original Paper
A cryogen-free automated measurement system of stable carbon isotope ratio of atmospheric methane

Presenter : Umezawa T., Andrews S., Saito T.
Title : , Journal of the Meteorological Society of Japan, 98(1):115-127 (2020)
Original Paper
Statistical characterization of urban CO2 emission signals observed by commercial airliner measurements

Presenter : Umezawa T., Matsueda H., Oda T., Higuchi K., Sawa Y., Machida T., Niwa Y., Maksyutov S.
Title : , Scientific Reports, 10(7963): (2020)
Original Paper
Methane budget of East Asia, 1990-2015: A bottom-up evaluation

Presenter : Ito A., Tohjima Y., Saito T., Umezawa T., Hajima T., Hirata R., Saito M., Terao Y.
Title : , Science of the Total Environment, 676:40-52 (2019)
Original Paper
Temporal variations of the mole fraction, carbon and hydrogen isotope ratios of atmospheric methane in the Hudson Bay Lowlands, Canada

Presenter : Fujita R., Morimoto S., Umezawa T., Ishijima K., Patra P.K., Worthy D.E.J., Goto D., Aoki S., Nakazawa T.
Title : , Journal of Geophysical Research: Atmosphere, 123: (2018)
Original Paper
Interlaboratory comparison of d13C and dD measurements of atmospheric CH4 for combined use of data sets from different laboratories

Presenter : Umezawa T., Brenninkmeijer C. A. M., Röckmann T., van der Veen C., Tyler S.C., Fujita R., Morimoto S., Aoki S., Sowers T., Schmitt J., Bock M., Beck J., Fischer H., Michel S.E., Vaughn B.H., Miller J.B., White J.W.C., Brailsford G., Schaefer H., Sperlich P., Brand W.A., Rothe M., Blunier T., Lowry D., Fisher R.E., Nisbet E.G., Rice A.L., Bergamaschi P., Veidt C., Levin I.
Title : , Atmospheric Measurement Techniques, 11:1207-1231 (2018)
Original Paper
Seasonal evaluation of tropospheric CO2 over the Asia-Pacific region observed by the CONTRAIL commercial airliner measurements

Presenter : Umezawa T., Matsueda H., Sawa Y., Niwa Y., Machida T., Zhou L.
Title : , Atmospheric Chemistry and Physics, 18:14851-14866 (2018)
Original Paper
Atmospheric observations show accurate reporting and little growth in India’s methane emissions

Presenter : Ganesan A.L., Rigby M., Lunt M.F., Parker R.J., Boesch H., Goulding N., Umezawa T., Zahn A., Chatterjee A., Prinn R.G., Tiwari Y.K., Van der Schoot M., Krummel P.B.
Title : , Nature Communications (2017)
Original Paper
Regional Methane Emission Estimation Based on Observed Atmospheric Concentrations (2002-2012)

Presenter : Patra P.K., Saeki T., Dlugokencky E.J., Ishijima K., Umezawa T., Ito A., Aoki S., Morimoto S., Kort E.A., Crotwell A., Ravi Kumar K., Nakazawa T.
Title : , Journal of the Meteorological Society of Japan. Ser. II, 94(1):91-113 (2016)
Original Paper
Winter crop CO2 uptake inferred from CONTRAIL measurements over Delhi, India

Presenter : Umezawa T., Niwa Y., Sawa Y., Machida T., Matsueda H.
Title : , Geophysical Research Letters (2016)
Original Paper
Variations in global methane sources and sinks during 1910-2010

Presenter : Ghosh A., Patra P. K., Ishijima K., Umezawa T., Ito A., Etheridge D. M., Sugawara S., Kawamura K., Miller J. B., Dlugokencky E. J., Krummel P. B. , Fraser P. J., Steele L. P., Langenfelds R. L., Trudinger C. M., White J. W. C., Vaughn B., Saeki T., Aoki S., Nakazawa T.
Title : , Atmospheric Chemistry and Physics, 15(5):2595-2612 (2015)

View all

Methane emissions decreased in fossil fuel exploitation and sustainably increased in microbial source sectors during 1990-2020

Presenter : Chandra N., Patra P.K., Fujita R., Hoglund-Isaksson L., Umezawa T., Goto D., Morimoto S., Vaughn B.H., Rockmann T.
Title : , Communications Earth & Environment, 5(147): (2024)
Bottom-Up Evaluation of the Methane Budget in Asia and Its Subregions

Presenter : Ito A., Patra P.K., Umezawa T.
Title : , Global Biogeochemical Cycles, 37(e2023GB007723):1-25 (2023)
Towards reconstructing the Arctic atmospheric methane history over the 20th century: measurement and modelling results for the North Greenland Ice Core Project firn

Presenter : Umezawa T., Sugawara S., Kawamura K., Oyabu I., Andrews S. J., Saito T., Aoki S., Nakazawa T.
Title : , Atmospheric Chemistry and Physics, 22:6899-6917 (2022)
Emissions from the Oil and Gas Sectors, Coal Mining and Ruminant Farming Drive Methane Growth over the Past Three Decades

Presenter : Naveen C., Patra P.K., Bisht J.S.H., Ito A., Umezawa T., Saigusa N., Morimoto S., Aoki S., Janssens-Maenhout G.
Title : , Journal of the Meteorological Society of Japan, 99(2):309-337 (2021)
Estimation of fire-induced carbon emissions from Equatorial Asia in 2015 using in situ aircraft and ship observations

Presenter : Niwa Y., Sawa Y., Nara H., Machida T., Matsueda H., Umezawa T., Ito A., Nakaoka S., Tanimoto H., Tohjima Y.
Title : , Atmospheric Chemistry and Physics, 21:9455-9473 (2021)
A cryogen-free automated measurement system of stable carbon isotope ratio of atmospheric methane

Presenter : Umezawa T., Andrews S., Saito T.
Title : , Journal of the Meteorological Society of Japan, 98(1):115-127 (2020)
Statistical characterization of urban CO2 emission signals observed by commercial airliner measurements

Presenter : Umezawa T., Matsueda H., Oda T., Higuchi K., Sawa Y., Machida T., Niwa Y., Maksyutov S.
Title : , Scientific Reports, 10(7963): (2020)
Methane budget of East Asia, 1990-2015: A bottom-up evaluation

Presenter : Ito A., Tohjima Y., Saito T., Umezawa T., Hajima T., Hirata R., Saito M., Terao Y.
Title : , Science of the Total Environment, 676:40-52 (2019)
Temporal variations of the mole fraction, carbon and hydrogen isotope ratios of atmospheric methane in the Hudson Bay Lowlands, Canada

Presenter : Fujita R., Morimoto S., Umezawa T., Ishijima K., Patra P.K., Worthy D.E.J., Goto D., Aoki S., Nakazawa T.
Title : , Journal of Geophysical Research: Atmosphere, 123: (2018)
Interlaboratory comparison of d13C and dD measurements of atmospheric CH4 for combined use of data sets from different laboratories

Presenter : Umezawa T., Brenninkmeijer C. A. M., Röckmann T., van der Veen C., Tyler S.C., Fujita R., Morimoto S., Aoki S., Sowers T., Schmitt J., Bock M., Beck J., Fischer H., Michel S.E., Vaughn B.H., Miller J.B., White J.W.C., Brailsford G., Schaefer H., Sperlich P., Brand W.A., Rothe M., Blunier T., Lowry D., Fisher R.E., Nisbet E.G., Rice A.L., Bergamaschi P., Veidt C., Levin I.
Title : , Atmospheric Measurement Techniques, 11:1207-1231 (2018)
Seasonal evaluation of tropospheric CO2 over the Asia-Pacific region observed by the CONTRAIL commercial airliner measurements

Presenter : Umezawa T., Matsueda H., Sawa Y., Niwa Y., Machida T., Zhou L.
Title : , Atmospheric Chemistry and Physics, 18:14851-14866 (2018)
Atmospheric observations show accurate reporting and little growth in India’s methane emissions

Presenter : Ganesan A.L., Rigby M., Lunt M.F., Parker R.J., Boesch H., Goulding N., Umezawa T., Zahn A., Chatterjee A., Prinn R.G., Tiwari Y.K., Van der Schoot M., Krummel P.B.
Title : , Nature Communications (2017)
Regional Methane Emission Estimation Based on Observed Atmospheric Concentrations (2002-2012)

Presenter : Patra P.K., Saeki T., Dlugokencky E.J., Ishijima K., Umezawa T., Ito A., Aoki S., Morimoto S., Kort E.A., Crotwell A., Ravi Kumar K., Nakazawa T.
Title : , Journal of the Meteorological Society of Japan. Ser. II, 94(1):91-113 (2016)
Winter crop CO2 uptake inferred from CONTRAIL measurements over Delhi, India

Presenter : Umezawa T., Niwa Y., Sawa Y., Machida T., Matsueda H.
Title : , Geophysical Research Letters (2016)
Variations in global methane sources and sinks during 1910-2010

Presenter : Ghosh A., Patra P. K., Ishijima K., Umezawa T., Ito A., Etheridge D. M., Sugawara S., Kawamura K., Miller J. B., Dlugokencky E. J., Krummel P. B. , Fraser P. J., Steele L. P., Langenfelds R. L., Trudinger C. M., White J. W. C., Vaughn B., Saeki T., Aoki S., Nakazawa T.
Title : , Atmospheric Chemistry and Physics, 15(5):2595-2612 (2015)

View all

Composition of firn air at the North Greenland Ice Core Project (NGRIP) site

Presenter : Kawamura K., Umezawa T., Sugawara S., Ishidoya S., Ishijima K., Saito T., Oyabu I., Murayama S., Morimoto S., Aoki S., Nakazawa T.
Title : , Polar Data Journal, 5:89-98 (2021)

View all

Research Result (Presentation)

all
Research Presentation
Research Lecture

Research Presentation
Characterizing Tokyo’s methane sources from vehicle-based measurements

Presenter : Umezawa T., Terao Y., Ueayama M.
Name of Society : Asia Oceania Geosciences Society 21st Annual Meeting (2024)
Name of Proceedings : Abstracts
Research Lecture
Measurement data to support emission reduction actions for the Global Methane Pledge goals

Presenter : Umezawa T., Terao Y., Ueayama M.
Name of Society : 2024 Japan Oil & Gas Methane Workshop: Advancing Multilateral Alignment (2024)
Name of Proceedings : -
Research Presentation
Growing emissions and Asian monsoon as dominant factors for atmospheric greenhouse gas variations over Asia

Presenter : Umezawa T., Terao Y., Machida T., Niwa Y., Sasakawa M., Ito A., Matsueda H., Tsuboi K., Ishijima K., Fujita R., Chandra N., Patra P. K., Aoki S., Nakazawa T., Morimoto S.
Name of Society : The 5th Atmospheric Composition and the Asian Monsoon (ACAM) workshop (2023)
Name of Proceedings : -
Research Presentation
Methane sources in South Asia inferred from observations of stable carbon isotope ratio of atmospheric methane

Presenter : Terao Y., Umezawa T., Ahmed M.K. , Manish Naja, Nomura S., Machida T., Sasakawa M., Mukai H., Patra P.K. , Rani S.
Name of Society : The 5th Atmospheric Composition and the Asian Monsoon (ACAM) workshop (2023)
Name of Proceedings : -
Research Presentation
Revision of global fossil fuel methane emissions based on trends and meridional gradients of CH4 and 13CH4 during 1990-2020

Presenter : Chandra N., Patra P. K., Fujita R., Umezawa T., Goto D., Morimoto S., Vaughn B. H., Rockmann T.
Name of Society : Seventh International Symposium on Arctic Research (2023)
Name of Proceedings : Abstracts
Research Presentation
Refining methane emission trends (1990-2020) through CH4 and δ13C-CH4 observations

Presenter : Chandra N., Patra P.K., Isaksson L.H., Fujita R., Umezawa T., Goto D., Morimoto S., Vaughn B.H., Rockmann T.
Name of Society : AGU annual meeting 2023 (2023)
Name of Proceedings : Abstracts
Multiple observation platforms and inverse/transport simulations for monitoring GHGs around Asia

Presenter : Niwa Y., Tohjima Y., Ishii M., Ito A., YAMADA K., Terao Y., Machida T., Umezawa T., Nakaoka S., Tanimoto H., Iida Y., Tsujino H., Kosugi N., Maki T., Ishijima K., Tsuboi K., Fujita R.
Name of Society : WMO International Greenhouse Gas Monitoring Symposium (2023)
Name of Proceedings : -
Research Presentation
Development of a dynamic dilution system for COS in air mixture at ambient levels

Presenter : Nara H., Saito T., Umezawa T., Tohjima Y.
Name of Society : 21th WMO/IAEA Meeting on Carbon Dioxide, Other Greenhouse Gases and Related Measurement Techniques (GGMT-2022) (2022)
Name of Proceedings : Abstracts, 39
Research Presentation
Measurements of stable carbon isotope ratio of methane at Hateruma Station, Japan

Presenter : Umezawa T., Terao Y., Tohjima Y., Saito T., Sasakawa M., Mukai H.
Name of Society : The 21st expert meeting on Greenhouse Gas Measurement Techniques (WMO GAW GGMT-2022) (2022)
Name of Proceedings : Abstracts
Research Presentation
The CONTRAIL commercial airliner measurements during the ACCLIP campaign

Presenter : Umezawa T., Machida T., Niwa Y., Matsueda H., Tsuboi K., Ishijima K., Fujita R.
Name of Society : ACCLIP Science Team Meeting (2022)
Name of Proceedings : -
Research Presentation
Asian methane outflow captured by the CONTRAIL flask air samplings

Presenter : Niwa Y., Machida T., Umezawa T., Tsuboi K., Ishijima K., Fujita R., Matsueda H., Saito T.
Name of Society : 日本地球惑星科学連合2021年大会 (2021)
Name of Proceedings : Abstracts
Research Presentation
Inverse analysis of fire-induced carbon emission from Equatorial Asia in 2015 with CONTRAIL and NIES-VOS data

Presenter : Niwa Y., Sawa Y., Nara H., Machida T., Matsueda H., Umezawa T., Ito A., Nakaoka S., Tanimoto H., Tohjima Y.
Name of Society : EGU General Assembly 2021 (2021)
Name of Proceedings : Abstracts
Research Presentation
UTLS aerosol measurements over Japan within eastward shedding vortices coming from the Asian summer monsoon anticyclone

Presenter : Fujiwara M., Sakai T., Shiraishi K., Hayashi M., Nishi N., Ogino S.-Y., Patra P., Umezawa T., Inai Y., Shiotani M., Eguchi N., Shibata T., Khaykin S., Pan L.L.
Name of Society : JpGU - AGU Joint Meeting 2020 (2020)
Name of Proceedings : Abstracts
Research Presentation
Relative contributions of different methane emission categories in the continental East Asia inferred from stable carbon isotope measurements at Hateruma Station

Presenter : Umezawa T., Saito T., Tohjima Y., Terao Y., Ito A.
Name of Society : JpGU - AGU Joint Meeting 2020 (2020)
Name of Proceedings : Abstracts
Research Presentation
The CONTRAIL commercial aircraft monitoring CO2 emissions from cities

Presenter : Umezawa T., Matsueda H., Oda T., Higuchi K., Sawa Y., Machida T., Niwa Y., Maksyutov S.
Name of Society : GML Virtual Global Monitoring Annual Conference 2020 (2020)
Name of Proceedings : Abstracts
Research Lecture
Greenhouse gases and related tracer measurements in the atmosphere over South Asia

Presenter : Terao Y., Ahmed Md.K., Naja M., Nomura S., Umezawa T., Machida T., Mukai H., Patra P.K.
Name of Society : International Conference on Earth and Environmental Sciences & Technology for Sustainable Development (ICEEST) 2020 (2020)
Name of Proceedings : Abstracts, 62
Research Presentation
Statistical characterization of atmospheric CO2 in airport proximity from the CONTRAIL commercial aircraft measurements

Presenter : Umezawa T., Matsueda H., Sawa Y., Machida T., Niwa Y., Higuchi K., Oda T., Maksyutov S.
Name of Society : The 20th WMO/IAEA Meeting on Carbon Dioxide, Other Greenhouse Gases, and Related Measurement Techniques (2019)
Name of Proceedings : Abstracts
Research Presentation
A cryogen-free automated measurement system of stable carbon isotope ratio of atmospheric methane

Presenter : Umezawa T., Andrews S., Saito T.
Name of Society : The 20th WMO/IAEA Meeting on Carbon Dioxide, Other Greenhouse Gases, and Related Measurement Techniques (2019)
Name of Proceedings : Abstracts
Research Presentation
Strategies to assess and reduce current inter-laboratory differences in δ13C- CH4 and δ2H-CH4 measurements in air samples

Presenter : Sperlich P., Brailsford G., Moss R., Bromley T., Gray S., Martin R., Moossen H., Rothe M., Brand W., Englund-Michel S., Vaughn B., White J., Umezawa T., Röckmann T., van der Veen C., Nisbet E., Fisher R., Lowry D.
Name of Society : The 20th WMO/IAEA Meeting on Carbon Dioxide, Other Greenhouse Gases, and Related Measurement Techniques (2019)
Name of Proceedings : Abstracts
Research Presentation
Transport pathways of high CH4 events observed over the western North Pacific

Presenter : Niwa Y., Machida T., Sawa Y., Umezawa T., Tsuboi K., Saito K., Matsueda H., Saigusa N.
Name of Society : 8th International Symposium on Non-CO2 Greenhouse Gases (NCGG8) (2019)
Name of Proceedings : -
Research Presentation
Investigation of transport processes associated with the Asian summer monsoon circulation using balloons, lidars, and aircrafts - Collaboration with the ACCLIP -

Presenter : Fujiwara M., Hayashi M., Ogino S., Shiraishi K., Sakai T., Umezawa T., Inai Y., Shiotani M., Nishi N., Patra P.K., Eguchi N.
Name of Society : 4th Atmospheric Composition and Asian Monsoon Workshop (ACAM 2019) (2019)
Name of Proceedings : -
Research Presentation
Asian summer monsoon signatures observed by the CONTRAIL commercial airliner measurements

Presenter : Umezawa T., Machida T., Matsueda H., Sawa Y., Niwa Y.
Name of Society : 4th Atmospheric Composition and Asian Monsoon Workshop (2019)
Name of Proceedings : -
Research Presentation
Global inverse analysis of CH4 fluxes using NICAM-TM 4D-Var

Presenter : Niwa Y., Ito A., Machida T., Sasakawa M., Tohjima Y., Terao Y., Umezawa T., Morimoto S., Aoki S., Sawa Y., Tsuboi K., Matsueda H., Dlugokencky E., Harth C., Krummel P. B., Langenfelds R. L., Loh Z. M., Mühle J., O’Doherty S., Prinn R. G., Ramonet M., Salameh P., Sweeney C., Weiss R., Young D., Castaldi S., Noce S., Saunois M., Stavert A. R.
Name of Society : 日本地球惑星科学連合2019年大会 (2019)
Name of Proceedings : -
Research Presentation
Evaluation of MIROC4-ACTM reanalysis of GHGs concentrations using aircraft observations

Presenter : Jagat B., Patra P.K., Chandra N., Gromov S., Umezawa T., Zahn A., Brenninkmeijer C.A.M.
Name of Society : Japan Geoscience Union Meeting 2019 (2019)
Name of Proceedings : Abstracts
Research Presentation
A cryogen-free automated measurement system of stable carbon isotope ratio of atmospheric methane

Presenter : Umezawa T., Saito T.
Name of Society : Japan Geoscience Union Meeting 2019 (2019)
Name of Proceedings : Abstracts
Research Presentation
Fire-induced CO2 emission in Equatorial Asia during the 2015 drought estimated by aircraft and ship observations

Presenter : Niwa Y., Sawa Y., Nara H., Machida T., Matsueda H., Umezawa T., Ito A., Nakaoka S., Tanimoto H.
Name of Society : AGU Fall Meeting 2019 (2019)
Name of Proceedings : -
Research Presentation
Investigation of Transport Processes in Association with the Asian Summer Monsoon Circulation Using Balloons, Lidars, and Aircrafts - Japanese Collaboration with the ACCLIP

Presenter : Fujiwara M., Hayashi M., Ogino S., Shiraishi K., Sakai T., Umezawa T., Inai Y., Shiotani M., Nishi N., Patra P. K., Eguchi N., Pan L.
Name of Society : AGU Fall Meeting 2019 (2019)
Name of Proceedings : Abstracts
Research Presentation
Past variations of atmospheric methane and its isotope ratios reconstructed from firn air and ice core measurements

Presenter : Umezawa T., Sugawara S, Kawamura K., Sugiyama T., Patra P.K., Ishijima K., Saito T., Morimoto S., Aoki S., Nakazawa T.
Name of Society : 2018 joint 14th iCACGP Quadrennial Symposium/15th IGAC Science Conference (2018)
Name of Proceedings : Abstracts
Research Presentation
Adjoint analysis on high CH4 mole fractions observed by aircraft

Presenter : Niwa Y., Machida T., Sawa Y., Umezawa T., Tsuboi K., Saito K., Matsueda H., Saigusa N.
Name of Society : Asia Oceania Geosciences Society 15th Annual Meeting (2018)
Name of Proceedings : Abstracts
Research Presentation
Forward and backward model analyses on high CH4 events observed over the western North Pacific

Presenter : Niwa Y., Machida T., Sawa Y., Umezawa T., Tsuboi K., Saito K., Matsueda H., Saigusa N.
Name of Society : Japan Geoscience Union Meeting 2018 (2018)
Name of Proceedings : Abstracts
Research Presentation
Inter-laboratory comparison of δ13C and δD measurements of atmospheric CH4 for combined use of datasets from different laboratories

Presenter : Umezawa T., Brenninkmeijer C.A.M., Röckmann T., van der Veen C., Tyler S.C., Fujita R., Morimoto S., Aoki S., Sowers T., Schmitt J., Bock M., Beck J., Fischer H., Michel S.E., Vaughn B.H., Miller J.B., White J.W.C., Brailsford G., Schaefer H., Sperlich P., Brand W.A., Rothe M., Blunier T., Lowry D., Fisher R.E., Nisbet E.G., Rice A.L., Bergamaschi P., Veidt C., Levin I.
Name of Society : EGU General Assembly 2018 (2018)
Name of Proceedings : Abstracts
Research Presentation
Climatological variations of tropospheric CO2 over the Asia-Pacific region observed by the CONTRAIL commercial airliner measurements

Presenter : Umezawa T., Matsueda H., Sawa Y., Niwa Y., Machida T., Zhou L.
Name of Society : EGU General Assembly 2018 (2018)
Name of Proceedings : Abstracts
Research Presentation
Temporal variations of the mole fraction, carbon and hydrogen isotope ratios of atmospheric methane in the Hudson Bay Lowlands, Canada

Presenter : Fujita R., Morimoto S., Umezawa T., Ishijima K., Patra P.K., Worthy D.E.J., Goto D., Aoki S., Nakazawa T.
Name of Society : Fifth International Symposium on Arctic Research (ISAR-5) (2018)
Name of Proceedings : Abstracts
Research Presentation
Variations of tropospheric CO2 over the Asia-Pacific region observed by the CONTRAIL commercial airliner measurements

Presenter : Umezawa T., Matsueda H., Sawa Y., Niwa Y., Machida T., Zhou L.
Name of Society : 10th International Carbon Dioxide Conference (2017)
Name of Proceedings : Abstracts
Research Presentation
Detecting carbon cycle change using an integrated observation, modeling and analysis system

Presenter : Saigusa N., Machida T., Umezawa T., Patra P.K., Saeki T., Niwa Y., Ichii K., Kondo M.
Name of Society : The joint conference of AsiaFlux Workshop 2017 and the 15th Anniversary Celebration of ChinaFLUX (2017)
Name of Proceedings : Abstracts - OS1-1
Research Presentation
Twenty-three year record of the mid-stratospheric 13CO2 over Japan

Presenter : Sugawara S., Ishidoya S., Morimoto S., Aoki S., Nakazawa T., Umezawa T., Toyoda S., Honda H.
Name of Society : 10th International Carbon Dioxide Conference (2017)
Name of Proceedings : Abstratcts
Research Presentation
Present activities and future plan for CONTRAIL project

Presenter : Machida T., Matsueda H., Sawa Y., Niwa Y., Umezawa T., Tsuboi K.
Name of Society : 10th International Carbon Dioxide Conference (2017)
Name of Proceedings : Abstracts
Research Presentation
Distributions and temporal changes of greenhouse gases in upper atmosphere observed by aircraft

Presenter : Machida T., Aoki S., Matsueda H., Sawa Y., Ishidoya S., Umezawa T., Sugawara S., Goto D., Niwa Y., Tsuboi K., Katsumata K., Nakazawa T., Morimoto S.
Name of Society : JpGU-AGU Joing Meeting 2017 (2017)
Name of Proceedings : Abstracts
Research Presentation
CONTRAIL commercial airliner CO2 measurements to detect regional/local fluxes

Presenter : Umezawa T., Niwa Y., Machida T., Sawa Y., Matsueda H.
Name of Society : 13th Annual Meeting Asia Oceania Geosciences Society (2016)
Name of Proceedings : -
Research Presentation
Structure of the Asian summer monsoon anticyclone observed by CONTRAIL commercial airliner trace gas measurements

Presenter : Umezawa T., Machida T., Niwa Y., Sawa Y., Matsueda H., Zhou L.
Name of Society : 13th Annual Meeting Asia Oceania Geosciences Society (2016)
Name of Proceedings : -
Research Presentation
Fine-scale CO2 variations over the Tokyo megacity observed by CONTRAIL

Presenter : Umezawa T., Matsueda H., Machida T., Sawa Y., Niwa Y.
Name of Society : 日本地球惑星科学連合2016年大会 (2016)
Name of Proceedings : -
Research Presentation
The recent changes and topics in CONTRAIL project

Presenter : Machida T., Umezawa T., Sawa, Y., Niwa, Y., Matsueda, H.
Name of Society : EGU General Assembly 2016 (2016)
Name of Proceedings : Abstracts
Research Lecture
Observation of atmospheric CH4 using aircraft platform

Presenter : Machida T., Sasakawa M., Umezawa T., Sawa Y., Matsueda H., Niwa Y., Tsuboi K., Murayama S., Morimoto S., Aoki S.
Name of Society : InGos International Conference (2015)
Name of Proceedings : Abstracts
Research Presentation
Methane isotope measurements of CARIBIC air samples and preliminary inter-laboratory comparisons

Presenter : Umezawa T., Brenninkmeijer C.A.M., Roeckmann T., Tyler S., Aoki S., Morimoto S.
Name of Society : InGOS International Conference (2015)
Name of Proceedings : -
Research Presentation
Global measurements aircraft of GHGs by CONTRAIL

Presenter : Niwa Y., Machida T., Sawa Y., Matsueda H., Umezawa T.
Name of Society : 11th International Workshop on Greenhouse Gas Measurements from Space (IWGGMS-11) (2015)
Name of Proceedings : Abstracts, 89-89
Research Presentation
Climatology of spatiotemporal variations of tropospheric CO2 observed by CONTRAIL-CME

Presenter : Umezawa T., Machida T., Sawa Y., Matsueda H., Niwa Y.
Name of Society : The 43rd NOAA ESRL Global Monitoring Annual Conference (2015)
Name of Proceedings : -
Research Presentation
Methyl chloride as a tracer of tropical tropospheric air in the lowermost stratosphere inferred from CARIBIC passenger aircraft measurements

Presenter : Umezawa T., Baker A.K., Brenninkmeijer C.A.M., Zahn A., Oram D., Velthoven P.V.
Name of Society : The 43rd NOAA ESRL Global Monitoring Annual Conference (2015)
Name of Proceedings : -
Research Presentation
Comparisons of CO2 and other greenhouse gases sampled by three different methods in the CONTRAIL project

Presenter : Machida T., Sawa, Y., Matsueda, H., Niwa, Y., Tsuboi, K., Katsumata K., Umezawa T., Eto, H., Morimoto, S., Aoki, S.
Name of Society : IAGOS-IGAS Joint Meeting (2015)

View all

Characterizing Tokyo’s methane sources from vehicle-based measurements

Presenter : Umezawa T., Terao Y., Ueayama M.
Name of Society : Asia Oceania Geosciences Society 21st Annual Meeting (2024)
Name of Proceedings : Abstracts
Growing emissions and Asian monsoon as dominant factors for atmospheric greenhouse gas variations over Asia

Presenter : Umezawa T., Terao Y., Machida T., Niwa Y., Sasakawa M., Ito A., Matsueda H., Tsuboi K., Ishijima K., Fujita R., Chandra N., Patra P. K., Aoki S., Nakazawa T., Morimoto S.
Name of Society : The 5th Atmospheric Composition and the Asian Monsoon (ACAM) workshop (2023)
Name of Proceedings : -
Methane sources in South Asia inferred from observations of stable carbon isotope ratio of atmospheric methane

Presenter : Terao Y., Umezawa T., Ahmed M.K. , Manish Naja, Nomura S., Machida T., Sasakawa M., Mukai H., Patra P.K. , Rani S.
Name of Society : The 5th Atmospheric Composition and the Asian Monsoon (ACAM) workshop (2023)
Name of Proceedings : -
Revision of global fossil fuel methane emissions based on trends and meridional gradients of CH4 and 13CH4 during 1990-2020

Presenter : Chandra N., Patra P. K., Fujita R., Umezawa T., Goto D., Morimoto S., Vaughn B. H., Rockmann T.
Name of Society : Seventh International Symposium on Arctic Research (2023)
Name of Proceedings : Abstracts
Refining methane emission trends (1990-2020) through CH4 and δ13C-CH4 observations

Presenter : Chandra N., Patra P.K., Isaksson L.H., Fujita R., Umezawa T., Goto D., Morimoto S., Vaughn B.H., Rockmann T.
Name of Society : AGU annual meeting 2023 (2023)
Name of Proceedings : Abstracts
The CONTRAIL commercial airliner measurements during the ACCLIP campaign

Presenter : Umezawa T., Machida T., Niwa Y., Matsueda H., Tsuboi K., Ishijima K., Fujita R.
Name of Society : ACCLIP Science Team Meeting (2022)
Name of Proceedings : -
Relative contributions of different methane emission categories in the continental East Asia inferred from stable carbon isotope measurements at Hateruma Station

Presenter : Umezawa T., Saito T., Tohjima Y., Terao Y., Ito A.
Name of Society : JpGU - AGU Joint Meeting 2020 (2020)
Name of Proceedings : Abstracts
The CONTRAIL commercial aircraft monitoring CO2 emissions from cities

Presenter : Umezawa T., Matsueda H., Oda T., Higuchi K., Sawa Y., Machida T., Niwa Y., Maksyutov S.
Name of Society : GML Virtual Global Monitoring Annual Conference 2020 (2020)
Name of Proceedings : Abstracts
Statistical characterization of atmospheric CO2 in airport proximity from the CONTRAIL commercial aircraft measurements

Presenter : Umezawa T., Matsueda H., Sawa Y., Machida T., Niwa Y., Higuchi K., Oda T., Maksyutov S.
Name of Society : The 20th WMO/IAEA Meeting on Carbon Dioxide, Other Greenhouse Gases, and Related Measurement Techniques (2019)
Name of Proceedings : Abstracts
Strategies to assess and reduce current inter-laboratory differences in δ13C- CH4 and δ2H-CH4 measurements in air samples

Presenter : Sperlich P., Brailsford G., Moss R., Bromley T., Gray S., Martin R., Moossen H., Rothe M., Brand W., Englund-Michel S., Vaughn B., White J., Umezawa T., Röckmann T., van der Veen C., Nisbet E., Fisher R., Lowry D.
Name of Society : The 20th WMO/IAEA Meeting on Carbon Dioxide, Other Greenhouse Gases, and Related Measurement Techniques (2019)
Name of Proceedings : Abstracts
Transport pathways of high CH4 events observed over the western North Pacific

Presenter : Niwa Y., Machida T., Sawa Y., Umezawa T., Tsuboi K., Saito K., Matsueda H., Saigusa N.
Name of Society : 8th International Symposium on Non-CO2 Greenhouse Gases (NCGG8) (2019)
Name of Proceedings : -
Evaluation of MIROC4-ACTM reanalysis of GHGs concentrations using aircraft observations

Presenter : Jagat B., Patra P.K., Chandra N., Gromov S., Umezawa T., Zahn A., Brenninkmeijer C.A.M.
Name of Society : Japan Geoscience Union Meeting 2019 (2019)
Name of Proceedings : Abstracts
Climatological variations of tropospheric CO2 over the Asia-Pacific region observed by the CONTRAIL commercial airliner measurements

Presenter : Umezawa T., Matsueda H., Sawa Y., Niwa Y., Machida T., Zhou L.
Name of Society : EGU General Assembly 2018 (2018)
Name of Proceedings : Abstracts
Detecting carbon cycle change using an integrated observation, modeling and analysis system

Presenter : Saigusa N., Machida T., Umezawa T., Patra P.K., Saeki T., Niwa Y., Ichii K., Kondo M.
Name of Society : The joint conference of AsiaFlux Workshop 2017 and the 15th Anniversary Celebration of ChinaFLUX (2017)
Name of Proceedings : Abstracts - OS1-1
CONTRAIL commercial airliner CO2 measurements to detect regional/local fluxes

Presenter : Umezawa T., Niwa Y., Machida T., Sawa Y., Matsueda H.
Name of Society : 13th Annual Meeting Asia Oceania Geosciences Society (2016)
Name of Proceedings : -
Structure of the Asian summer monsoon anticyclone observed by CONTRAIL commercial airliner trace gas measurements

Presenter : Umezawa T., Machida T., Niwa Y., Sawa Y., Matsueda H., Zhou L.
Name of Society : 13th Annual Meeting Asia Oceania Geosciences Society (2016)
Name of Proceedings : -
Fine-scale CO2 variations over the Tokyo megacity observed by CONTRAIL

Presenter : Umezawa T., Matsueda H., Machida T., Sawa Y., Niwa Y.
Name of Society : 日本地球惑星科学連合2016年大会 (2016)
Name of Proceedings : -
Global measurements aircraft of GHGs by CONTRAIL

Presenter : Niwa Y., Machida T., Sawa Y., Matsueda H., Umezawa T.
Name of Society : 11th International Workshop on Greenhouse Gas Measurements from Space (IWGGMS-11) (2015)
Name of Proceedings : Abstracts, 89-89
Climatology of spatiotemporal variations of tropospheric CO2 observed by CONTRAIL-CME

Presenter : Umezawa T., Machida T., Sawa Y., Matsueda H., Niwa Y.
Name of Society : The 43rd NOAA ESRL Global Monitoring Annual Conference (2015)
Name of Proceedings : -
Development of a dynamic dilution system for COS in air mixture at ambient levels

Presenter : Nara H., Saito T., Umezawa T., Tohjima Y.
Name of Society : 21th WMO/IAEA Meeting on Carbon Dioxide, Other Greenhouse Gases and Related Measurement Techniques (GGMT-2022) (2022)
Name of Proceedings : Abstracts, 39
Measurements of stable carbon isotope ratio of methane at Hateruma Station, Japan

Presenter : Umezawa T., Terao Y., Tohjima Y., Saito T., Sasakawa M., Mukai H.
Name of Society : The 21st expert meeting on Greenhouse Gas Measurement Techniques (WMO GAW GGMT-2022) (2022)
Name of Proceedings : Abstracts
Asian methane outflow captured by the CONTRAIL flask air samplings

Presenter : Niwa Y., Machida T., Umezawa T., Tsuboi K., Ishijima K., Fujita R., Matsueda H., Saito T.
Name of Society : 日本地球惑星科学連合2021年大会 (2021)
Name of Proceedings : Abstracts
Inverse analysis of fire-induced carbon emission from Equatorial Asia in 2015 with CONTRAIL and NIES-VOS data

Presenter : Niwa Y., Sawa Y., Nara H., Machida T., Matsueda H., Umezawa T., Ito A., Nakaoka S., Tanimoto H., Tohjima Y.
Name of Society : EGU General Assembly 2021 (2021)
Name of Proceedings : Abstracts
UTLS aerosol measurements over Japan within eastward shedding vortices coming from the Asian summer monsoon anticyclone

Presenter : Fujiwara M., Sakai T., Shiraishi K., Hayashi M., Nishi N., Ogino S.-Y., Patra P., Umezawa T., Inai Y., Shiotani M., Eguchi N., Shibata T., Khaykin S., Pan L.L.
Name of Society : JpGU - AGU Joint Meeting 2020 (2020)
Name of Proceedings : Abstracts
A cryogen-free automated measurement system of stable carbon isotope ratio of atmospheric methane

Presenter : Umezawa T., Andrews S., Saito T.
Name of Society : The 20th WMO/IAEA Meeting on Carbon Dioxide, Other Greenhouse Gases, and Related Measurement Techniques (2019)
Name of Proceedings : Abstracts
Investigation of transport processes associated with the Asian summer monsoon circulation using balloons, lidars, and aircrafts - Collaboration with the ACCLIP -

Presenter : Fujiwara M., Hayashi M., Ogino S., Shiraishi K., Sakai T., Umezawa T., Inai Y., Shiotani M., Nishi N., Patra P.K., Eguchi N.
Name of Society : 4th Atmospheric Composition and Asian Monsoon Workshop (ACAM 2019) (2019)
Name of Proceedings : -
Asian summer monsoon signatures observed by the CONTRAIL commercial airliner measurements

Presenter : Umezawa T., Machida T., Matsueda H., Sawa Y., Niwa Y.
Name of Society : 4th Atmospheric Composition and Asian Monsoon Workshop (2019)
Name of Proceedings : -
Global inverse analysis of CH4 fluxes using NICAM-TM 4D-Var

Presenter : Niwa Y., Ito A., Machida T., Sasakawa M., Tohjima Y., Terao Y., Umezawa T., Morimoto S., Aoki S., Sawa Y., Tsuboi K., Matsueda H., Dlugokencky E., Harth C., Krummel P. B., Langenfelds R. L., Loh Z. M., Mühle J., O’Doherty S., Prinn R. G., Ramonet M., Salameh P., Sweeney C., Weiss R., Young D., Castaldi S., Noce S., Saunois M., Stavert A. R.
Name of Society : 日本地球惑星科学連合2019年大会 (2019)
Name of Proceedings : -
A cryogen-free automated measurement system of stable carbon isotope ratio of atmospheric methane

Presenter : Umezawa T., Saito T.
Name of Society : Japan Geoscience Union Meeting 2019 (2019)
Name of Proceedings : Abstracts
Fire-induced CO2 emission in Equatorial Asia during the 2015 drought estimated by aircraft and ship observations

Presenter : Niwa Y., Sawa Y., Nara H., Machida T., Matsueda H., Umezawa T., Ito A., Nakaoka S., Tanimoto H.
Name of Society : AGU Fall Meeting 2019 (2019)
Name of Proceedings : -
Investigation of Transport Processes in Association with the Asian Summer Monsoon Circulation Using Balloons, Lidars, and Aircrafts - Japanese Collaboration with the ACCLIP

Presenter : Fujiwara M., Hayashi M., Ogino S., Shiraishi K., Sakai T., Umezawa T., Inai Y., Shiotani M., Nishi N., Patra P. K., Eguchi N., Pan L.
Name of Society : AGU Fall Meeting 2019 (2019)
Name of Proceedings : Abstracts
Past variations of atmospheric methane and its isotope ratios reconstructed from firn air and ice core measurements

Presenter : Umezawa T., Sugawara S, Kawamura K., Sugiyama T., Patra P.K., Ishijima K., Saito T., Morimoto S., Aoki S., Nakazawa T.
Name of Society : 2018 joint 14th iCACGP Quadrennial Symposium/15th IGAC Science Conference (2018)
Name of Proceedings : Abstracts
Adjoint analysis on high CH4 mole fractions observed by aircraft

Presenter : Niwa Y., Machida T., Sawa Y., Umezawa T., Tsuboi K., Saito K., Matsueda H., Saigusa N.
Name of Society : Asia Oceania Geosciences Society 15th Annual Meeting (2018)
Name of Proceedings : Abstracts
Forward and backward model analyses on high CH4 events observed over the western North Pacific

Presenter : Niwa Y., Machida T., Sawa Y., Umezawa T., Tsuboi K., Saito K., Matsueda H., Saigusa N.
Name of Society : Japan Geoscience Union Meeting 2018 (2018)
Name of Proceedings : Abstracts
Inter-laboratory comparison of δ13C and δD measurements of atmospheric CH4 for combined use of datasets from different laboratories

Presenter : Umezawa T., Brenninkmeijer C.A.M., Röckmann T., van der Veen C., Tyler S.C., Fujita R., Morimoto S., Aoki S., Sowers T., Schmitt J., Bock M., Beck J., Fischer H., Michel S.E., Vaughn B.H., Miller J.B., White J.W.C., Brailsford G., Schaefer H., Sperlich P., Brand W.A., Rothe M., Blunier T., Lowry D., Fisher R.E., Nisbet E.G., Rice A.L., Bergamaschi P., Veidt C., Levin I.
Name of Society : EGU General Assembly 2018 (2018)
Name of Proceedings : Abstracts
Temporal variations of the mole fraction, carbon and hydrogen isotope ratios of atmospheric methane in the Hudson Bay Lowlands, Canada

Presenter : Fujita R., Morimoto S., Umezawa T., Ishijima K., Patra P.K., Worthy D.E.J., Goto D., Aoki S., Nakazawa T.
Name of Society : Fifth International Symposium on Arctic Research (ISAR-5) (2018)
Name of Proceedings : Abstracts
Variations of tropospheric CO2 over the Asia-Pacific region observed by the CONTRAIL commercial airliner measurements

Presenter : Umezawa T., Matsueda H., Sawa Y., Niwa Y., Machida T., Zhou L.
Name of Society : 10th International Carbon Dioxide Conference (2017)
Name of Proceedings : Abstracts
Twenty-three year record of the mid-stratospheric 13CO2 over Japan

Presenter : Sugawara S., Ishidoya S., Morimoto S., Aoki S., Nakazawa T., Umezawa T., Toyoda S., Honda H.
Name of Society : 10th International Carbon Dioxide Conference (2017)
Name of Proceedings : Abstratcts
Present activities and future plan for CONTRAIL project

Presenter : Machida T., Matsueda H., Sawa Y., Niwa Y., Umezawa T., Tsuboi K.
Name of Society : 10th International Carbon Dioxide Conference (2017)
Name of Proceedings : Abstracts
Distributions and temporal changes of greenhouse gases in upper atmosphere observed by aircraft

Presenter : Machida T., Aoki S., Matsueda H., Sawa Y., Ishidoya S., Umezawa T., Sugawara S., Goto D., Niwa Y., Tsuboi K., Katsumata K., Nakazawa T., Morimoto S.
Name of Society : JpGU-AGU Joing Meeting 2017 (2017)
Name of Proceedings : Abstracts
The recent changes and topics in CONTRAIL project

Presenter : Machida T., Umezawa T., Sawa, Y., Niwa, Y., Matsueda, H.
Name of Society : EGU General Assembly 2016 (2016)
Name of Proceedings : Abstracts
Methane isotope measurements of CARIBIC air samples and preliminary inter-laboratory comparisons

Presenter : Umezawa T., Brenninkmeijer C.A.M., Roeckmann T., Tyler S., Aoki S., Morimoto S.
Name of Society : InGOS International Conference (2015)
Name of Proceedings : -
Methyl chloride as a tracer of tropical tropospheric air in the lowermost stratosphere inferred from CARIBIC passenger aircraft measurements

Presenter : Umezawa T., Baker A.K., Brenninkmeijer C.A.M., Zahn A., Oram D., Velthoven P.V.
Name of Society : The 43rd NOAA ESRL Global Monitoring Annual Conference (2015)
Name of Proceedings : -
Comparisons of CO2 and other greenhouse gases sampled by three different methods in the CONTRAIL project

Presenter : Machida T., Sawa, Y., Matsueda, H., Niwa, Y., Tsuboi, K., Katsumata K., Umezawa T., Eto, H., Morimoto, S., Aoki, S.
Name of Society : IAGOS-IGAS Joint Meeting (2015)

View all

Measurement data to support emission reduction actions for the Global Methane Pledge goals

Presenter : Umezawa T., Terao Y., Ueayama M.
Name of Society : 2024 Japan Oil & Gas Methane Workshop: Advancing Multilateral Alignment (2024)
Name of Proceedings : -
Greenhouse gases and related tracer measurements in the atmosphere over South Asia

Presenter : Terao Y., Ahmed Md.K., Naja M., Nomura S., Umezawa T., Machida T., Mukai H., Patra P.K.
Name of Society : International Conference on Earth and Environmental Sciences & Technology for Sustainable Development (ICEEST) 2020 (2020)
Name of Proceedings : Abstracts, 62
Observation of atmospheric CH4 using aircraft platform

Presenter : Machida T., Sasakawa M., Umezawa T., Sawa Y., Matsueda H., Niwa Y., Tsuboi K., Murayama S., Morimoto S., Aoki S.
Name of Society : InGos International Conference (2015)
Name of Proceedings : Abstracts

View all

UMEZAWA Taku

About