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Login to WDCGG as
CH3D _ EOM _ aircraft - flask _ TU _ data1
Have you completed registration?
Registration and login are needed to download data files.
In line with the GAW Data Policy, users should contact the contributors of all data of interest and propose co-authorship or acknowledgement.


 Organization

NO 70
Acronym TU
Name Tohoku University
Address 1 Center for Atmospheric and Oceanic Studies
Address 2 6-3 Aoba, Aramaki, Aoba-ku
Address 3 Sendai 980-8578
Country/Territory Japan
Website http://tgr.gp.tohoku.ac.jp

 Contact(s)

Name Taku Umezawa
Prefix
Email umezawa.taku@nies.go.jp
Organization No 53
Organization acronym NIES
Organization name National Institute for Environmental Studies
Organization country/territory Japan
Address 1
Address 2
Address 3
Country/territory Japan
Tel
Fax
Last updated date 2023-12-12


Name Shinji Morimoto
Prefix Prof.
Email mon@tohoku.ac.jp
Organization No 70
Organization acronym TU
Organization name Tohoku University
Organization country/territory Japan
Address 1
Address 2
Address 3 Aoba 6-3, Aramaki, Aoba-ku, Sendai 980-8578
Country/territory Japan
Tel +81-22-795-5780
Fax +81-22-795-5797
Last updated date 2024-10-04


NO 53
Acronym NIES
Name National Institute for Environmental Studies
 Unknown
 UTC
 permil
 9999-12-31 00:00:00 - 9999-12-31 23:59:59: VSMOW
 9999-12-31 00:00:00 - 9999-12-31 23:59:59: delta plus XP, ThermoFisher Scientific Inc. (Mass spectrometry)
 event
 VSMOW scale, details are in Umezawa et al. (2009) and Umezawa et al. (2012).
A pure H2 cylinder and our own maintained air is used for calibration. Details are in Umezawa et al. (2009) and Umezawa et al. (2012).
 
 [Hourly]
 [Daily]
 [Monthly]
 
 Terminated
 Temporal and spatial variations of CH3D in the upper troposphere over the western Pacific. Details are described in Umezawa et al. (2012).

The present CH3D measurements were done almost once a month from 2006-12-09 to 2010-03-15 for air samples collected along flight tracks between Japan and Australia or between Japan and Guam. For the period from 2010-05-20 to 2010-9-11, air samples collected during flights between Japan and Hawaii were measured.

The measurement system includes preconcentration of CH4, gas chromatgraph separation, pyrolysis and isotope mass spectrometery. Details are in Umezawa et al. (2009).

Air samples were collected into 12 titanium flasks using the Automatic Air Sampling Equipment (ASE) for the JAL airliner flights. Details are described in Machida et al. (2008).
 Wind direction:
 Wind speed:
 Relative humidity:
 Precipitation amount:
 Air pressure:
 Air temperature:
 Dew point temperature:
 Sea water temperature:
 Sea surface water temperature:
 Sea water salinity:
 Sea surface water salinity:
Meteorological data may remain as first provided, even when greenhouse gas data are updated.
 
No DOI available

 Related information

Format Text (WDCGG Data Format Table, WDCGG Meteorological Data Format Table), NetCDF
Relation List (Is Part Of) All CH3D data contributed to WDCGG by GAW stations and mobiles by 2023-12-12
All CH3D data contributed to WDCGG by GAW stations and mobiles by 2022-06-22
All CH3D data contributed to WDCGG by GAW stations and mobiles by 2020-10-06
All CH3D data contributed to WDCGG by GAW stations and mobiles by 2020-07-03
All CH3D data contributed to WDCGG by GAW stations and mobiles by 2019-08-19
All CH3D data contributed to WDCGG by GAW stations and mobiles by 2018-06-18

 GAW Data Policy

"For Scientific purposes, access to these data is unlimited and provided without charge. By their use you accept that an offer of co-authorship will be made through personal contact with the data providers or owners whenever substantial use is made of their data. In all cases, an acknowledgement must be made to the data providers or owners and to the data centre when these data are used within a publication."

 Citation format

This format is an example of the WDCGG standard citation.
Please follow the citation format which the data providers or owners indicate.
Taku Umezawa (NIES), Shinji Morimoto (TU), Atmospheric CH3D by CONTRAIL, Tohoku University, dataset published as CH3D_EOM_ aircraft-flask_TU_data1 at WDCGG, ver. 2023-12-12-0947 (Reference date*: YYYY/MM/DD)

* As the reference date, please indicate the date you downloaded the files.

 Reference(s)

1  Umezawa, T., S. Aoki, T. Nakazawa and S. Morimoto (2009) A high-precision measurement system for carbon and hydrogen isotopic ratios of atmospheric methane and its application to air samples collected in the western Pacific region, Journal of the Meteorological Society of Japan, 87(3), 365–379.
2  Umezawa, T., T. Machida, K. Ishijima, H. Matsueda, Y. Sawa, P. K. Patra, S. Aoki and T. Nakazawa (2012) Carbon and hydrogen isotopic ratios of atmospheric methane in the upper troposphere over the western Pacific, Atmospheric Chemistry and Physics, 12, 8095–8113, doi:10.5194/acp-8095-2012.
3  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 airliners, Journal of Atmospheric and Oceanic Technology, 25(10), 1744–1754, doi:10.1175/2008JTECHA1082.1.
4  CONTRAIL website: http://www.cger.nies.go.jp/contrail/