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Quasi-Real-Time Estimation of CO₂/CH₄ Emission Ratios Based on Atmospheric Observations at Hateruma Island (Provisional)

Atmospheric Observations

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Changes in atmospheric CO₂ and CH₄ concentrations observed at Hateruma and Yonaguni

Changes in atmospheric CO₂ and CH₄ concentrations observed at Hateruma and Yonaguni

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Estimation Method

The ratio of atmospheric concentration variations (ΔCO₂/ΔCH₄) observed during the three months from January to March reflects the CO₂/CH₄ emission ratio in China.

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Chart or figure related to Estimation Method
Chart or figure related to Estimation Method

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Estimation of Long-term Changes in CO₂/CH₄ Emission Ratios in East Asian Continent

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Estimated Changes in FFCO₂/CH₄ Emission Ratios in East Asian Continent Since 2020

Rate of change is calculated relative to the average value for the preceding nine years (2011-2019).

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