In 1992, the Center for Global Environmental Research, Earth System Division, National Institute for Environmental Studies established a station on Hateruma Island, a small sub-tropical island located at the southern end of Japan. The long-term trend of greenhouse gases and air pollutants in Eastern Asia has been monitored since then.
This page presents the most up-to-date trend and annual change of carbon dioxide (CO2), ozone (O3), sulfur dioxide (SO2), nitric oxide (NO), nitrogen oxides (NOx), optical black carbon (OBC), and particulate matter (PM2.5, PM10) observed on Hateruma Island.
Please note that the values and plots provided here are not fully quality-controlled and contain outliers. The data for the short-lived component will be replaced with more accurate data in the near future. Please use the quality-controlled data published in the "Dataset List" for scientific use.
Select the compound(s) you want to view.
You can see the following latest plots for each compound of greenhouse gases and air pollutants observed at the Hateruma station.
| Time range | Daily mean value |
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The data available from here are not fully quality-controlled and contain outliers. The data for the short-lived component will be replaced with more accurate data in the near future. Please use the quality-controlled data published in the "Dataset List" for scientific use.
You can see the latest data of 1-day mean, 7-day mean, 30-day mean, and 365-day mean values calculated from 1-hour values for each compound of greenhouse gases and air pollutants observed at the Hateruma station.
| Mean | 1-Day | 7-Days | 30-Days | 365-Days | Last Updated |
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You can see the annual change which is calculated by the difference between daily mean concentrations in the past 365 days and the concentrations in the same period of the previous year for CO2 and O3 observed at the Hateruma station. A positive value indicates an increase of the annual rate.
To avoid the 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].
| Annual change | Last Updated |
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