CO2 Trend at Hateruma

This page presents the most up-to-date CO2 trend and increase rate observed at Hateruma Island, a small sub-tropical island located at the southern end of Japan. The station was established in 1992 to monitor the long-term trend of greenhouse gases in the Eastern Asia.

The values here are preliminary, Please note that there may be changed by the detailed examination in the future.

Annual CO2 increase

2.36 ppm (2017/07/26)

The annual increase is calculated by the difference of daily mean CO2 concentrations in the past 365 days and the concentrations in the same period of the previous year. To avoid effect of missing data, the daily mean concentrations are obtained by Thoning's exponential frequency filter [Thoning et al., 1989, J. Geophys. Res., 94(6):8549-8565].

Mean CO2 concentrations up to 2017/07/26

Recent Day Recent Week Recent Month Recent Year
406.83 ppm 407.09 ppm 407.68 ppm 408.33 ppm

More details of real time CO2 concentrations

Long term trend of daily mean CO2 concentrations.
Daily mean CO2 concentrations in the past 365 days comparing with the previous year's level.
Hourly CO2 concentrations in the past 365 days.
Hourly CO2 concentrations in the past 30 days.
Hourly CO2 concentrations in the past 7 days.
Daily CO2 data. (Part of the data are preliminary, subjecting to change in the future.)
CO2 at Hateruma

Archived data at Hateruma

If you click here, you can link to the page of "database", to see the detailed data of Hateruma station.