CO2 Trend at Cape Ochiishi

This page presents the most up-to-date CO2 trend and increase rate observed at Cape Ochi-ishi. The station is located at the southern tip of the cape and 50 m above sea level. The station was established in 1994 to monitor the long-term trend of greenhouse gases in higher latitude.

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

Annual CO2 increase

2.82 ppm (2017/11/17)

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 2017/11/17

Recent Day Recent Week Recent Month Recent Year
412.46 ppm 412.34 ppm 411.15 ppm 408.86 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 Ochiishi

Archived data at Cape Ochiishi

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