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# AirBorne Campaign for Carbon Dioxide (AB2CD)


The AB2CD campaign, funded by ESA and lead by LMD/Polytechnique-Solutions, takes place in France and Spain from Monday 6th to Saturday 18th of October 2026.

Its main objective: to advance our fundamental scientific understanding of the potential offered by lidar active measurements techniques to characterize atmospheric burden of greenhouse gases (GHG) and related surface emissions.

An international consortium of a dozen teams will operate a battery of instruments deployed on the ground and onboard three research aircrafts.


```{seealso}
Operational center website for AB2CD campaign

[AERIS website for AB2CD](https://observations.ipsl.fr/aeris/magic/?ab2cd)

```


```{admonition} AB2CD
:class: tip
- Where: Madrid, Barcelona, Bilbao and Fos-sur-mer
- When: 6th-18th October 2025
- Platforms: 3 research aircrafts and ground-based spectrometers
- Team: LMD/FXConseil (lead), DLR, ONERA, CNES, SAFIRE, ENOLEO/LSCE, Gerfaut, GHGSat, AEMET
- Lead scientist: C. Crevoisier

```