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News

Data release
Mobile measurement data of methane and ethane in the Tokyo area are released.

Data release

2025-10-21

Data update
The latest version of atmospheric trace gas data from the CONTRAIL is released.

Data Update

2025-10-03

Data update
The latest version of atmospheric trace gas data from the CONTRAIL is released.

Data Update

2025-08-22

Data update
The atmospheric CO2 and CH4 mixing ratio data observed at the Hateruma and Ochiishi stations are updated with the latest data up to March 2025.

Data Update

2025-08-06

Analysis Tools

"Analysis Tools" provides online tools that are helpful for users to make their own analyses.

About Analysis Tools

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Trend Analysis

Trend Analysis
Tajectory

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Footprint

Footprint