A part of our observation data is downloadable.

Notice:
1. These data are freely available for use in education and research. If the data are used for scientific publication and/or presentation, it is necessary to get approval of the data provider in advance. Judging from the nature of the data usage, the data provider may require fair acknowledgement including co-authorship to the data user.
2. For technical reasons, the data may be revised without any notice.
3. This data file must be obtained from the original data site and not be re-distributed.
4. When you click the link, registration of your e-mail address will be required. After the registration, you will be able to download the data.

	Surface Station CO2 concentration at Syowa Station, Antarctica CO concentration at Syowa Station, Antarctica CH4 concentration at Syowa Station, Antarctica CH4 concentration at Syowa Station, Antarctica (grab-sampling) d(O2/N2) at Syowa Station, Antarctica SF6 concentration at Syowa Station, Antarctica (grab-sampling) CO2 concentration at Ny Aalesund, Svalbard CH4 concentration at Ny-Ålesund, Svalbard d13C of CO2 at Ny Aalesund, Svalbard d13C of CH4 at Ny-Ålesund, Svalbard dD of CH4 at Ny Ålesund, Svalbard d(O2/N2) at Ny Aalesund, Svalbard d13C of CH4 at Churchill, Canada dD of CH4 at Churchill, Canada
	Aircraft Observation CO2 concentration over Japan CH4 concentration over Japan N2O concentration over Japan CO2 and CH4 concentration over Alaska
	Shipboard Observation N2O concentration in the western Pacific CO2 concentration between Ishigaki and Hateruma Atmospheric d(O2/N2) and CO2 concentrations between Australia and Syowa Station
	Ice core data CO2 concentration in Dome F ice core CO2 concentration in H15 core N2O concentration in H15 core