Trace gas mole fraction data from measurements of air samples collected in the stratosphere over Japan

Click Here to Download Click Here to Download

The present dataset includes a set of trace gas mole fraction data measured from air samples collected in the stratosphere over Japan in 2020. The air samples were collected by using a balloon-borne cryogenic air sampler and they were analyzed by a series of measurement systems.


Taku Umezawa*1 (, Satoshi Sugawara*2, Shinji Morimoto*3, Takuya Saito*1
*1Earth System Division, National Institute for Environmental Studies (NIES)
*2Faculty of Education, Miyagi University of Education
*3Center for Atmospheric and Oceanic Studies, Graduate School of Science, Tohoku University
Release date
Temporal coverage
2020/07/25 - 2020/07/25
Data provider
Email: cgerdb_admin(at)
File format
Data volume
11.2 KB
ver.1.0 (Last updated: 2024/06/25)

Data Set

CO2, SF6, HFC-23, HFC-134a, HFC-227ea, PFC-218, PFC-318, CFC-11, CFC-12, CFC-13, CFC-113, CFC-114, CFC-115
Observation period
2020/07/25 - 2020/07/25
42.483°N, 143.267°E
Sampling height: 14.79 - 35.36 km
Spatial coverage
Latitude: 42.3099 - 42.4487 °
Longitude: 143.452 - 144.633 °
Vertical: 14.79 - 35.36 km
Measurement method
The CO2 mole fraction was measured by using a nondispersive infrared gas analyzer (NDIR) at Tohoku University. The SF6 mole fraction was measured by using a gas chromatograph equipped with an electron capture detector (GC-ECD) at Miyagi University of Education. The halocarbon mole fractions were measured by using a preconcentration gas chromatograph-mass spectrometer (GC-MS) system at National Institute for Environmental Studies.
Calculation method
The CO2 mole fractions are reported on the TU (Tohoku University)-2010 scale (μmol/mol, ppm). The SF6 mole fractions are reported on the TU-2002 scale (pmol/mol, ppt). The halocarbon mole fractions are reported on the NIES-08 scales (pmol/mol, ppt).
[Free keywords]
CO2, SF6, CFC, HFC, PFC, stratosphere, balloon
Air-based Platforms > Balloons > Balloons
Atmosphere > Atmospheric Chemistry > Carbon and Hydrocarbon Compounds Atmosphere > Atmospheric Chemistry > Halocarbons and Halogens
Update history
Version 1.0 was released (ver.1.0)


The balloon stratospheric sampling flight was conducted with support from the Scientific Ballooning (DAIKIKYU) Research and Operation Group of the Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Japan.


Umezawa et al. (manuscript in preparation), New estimates of stratospheric age of air from halocarbon measurements of air samples collected by a balloon-borne cryogenic air sampler over Japan.
Sugawara, S., S. Ishidoya, S. Aoki, S. Morimoto, T. Nakazawa, S. Toyoda, et al. (2018), Age and gravitational separation of the stratospheric air over Indonesia, Atmos. Chem. Phys., 18, 1819–1833, doi:10.5194/acp-18-1819-2018.

Terms and Conditions of Use*

*By accessing or using the Service you agree to follow these Terms. If you disagree with any part of the Terms, you may not access the Service.
The author of this data set (hereafter "Author") agrees to the use of this data set by person(s) wishing to use the data (hereafter "User") as stipulated in the Terms and Conditions below.

Scope of consent
The User may re-distribute the data to third party without any change or transformation of the data, and may publish new intellectual products (hereafter "Products") based on this data set.
Conditions for distribution
The User shall not accept any compensation for the re-distribution of the data of this data set to a third party.
In the event that the User re-distributes the data of this data set to a third party, the same Terms and Conditions apply also to the re-distributed data set.
When the User re-distributes the data of this data set to a third party, the User is obliged to inform the third party about the URL of the original data set, the Terms and Conditions of Use, and the fact that the data set is continuously updated by the Author.
Use of the latest version
Unless special reason exists, the User shall use the latest version of this data set.
Citation policy
When publishing any Products based on the present data set, it must be clearly stated that the present data set was used.
However, the Author may request the User to delete the citation from the Product. In that case, the User shall comply with the request within reasonable extent.
If this data set is essential in a new product, publication or presentation, the User should contact to the Author for appropriate co-authorship in advance. If this data set plays a potentially important role in the User's work, discussion with the Author at an early stage is encouraged.
Citation format
When this data set is referred to in publications, it should be cited in the following format.
Umezawa et al. (2024), Trace gas mole fraction data from measurements of air samples collected in the stratosphere over Japan , Ver.x.x.*1, NIES, DOI:10.17595/20240625.001, (Reference date*2: YYYY/MM/DD)
*1 The version number is indicated in the name of each data file.
*2 As the reference date, please indicate the date you downloaded the files.
Utilization reporting
Re-distribution of the data or release of Products derived from the data set, shall be reported to the Data Provider without delay.
Error reporting
Any error in the data set, or the suspicion thereof, should be immediately reported to the Data Provider.
The Author and the Data Provider shall not have any liability or responsibility whatsoever for any damage that may arise from the use of this data set, and the User must not imply that any guarantee is provided by the Author or the Data Provider. Any injury or loss arising from the use of this data set is solely the responsibility of the User.

Advisory Service

Advisory service
If you need scientific advice or expert opinion regarding the contents or scientific validity of this data set or Products derived from it, we can provide an advisory service based on an individual contract, different from the Terms and Conditions of Use.
Depending on the extent of the help required, we can offer collaboration and/or supervision of the work based on the present data set. If you want to use our advisory service, contact the Data Provider.