Due to a technical failure on our system, this website was not accessible from 9:59 UTC on 21 May 2019 to 1:32 on 22 May 2019.
We apologize for any inconvenience caused by this.

This website has started to provide satellite data.

WMO WDCGG Data Summary No. 42 is corrected.

WMO Greenhouse Gas Bulletin No. 14 is released.

WMO WDCGG Data Summary No. 42 is released.

This website is open to public including data users.

This website is open only to the data providers of GHG (including CO) data/metadata for data submission.

From 1 Jan. 2016, the responsibility related to archiving of reactive gases measurement data (except for CO) is transferred to the newly established GAW World Data Centre for Reactive Gases (WDCRG) hosted by the Norwegian Institute for Air Research (NILU). Click here for the WMO official letter on this transfer.