![](https://across.cnrs.fr/wp-content/uploads/2021/11/Nowcast-figure-map-with-annotations7c-cropped.jpg)
ACROSS is a project supported by the Make Our Planet Great Again initiative that enables focused research on the interactions of urban and biogenically-influenced air masses. A highlight of this project is a comprehensive, multi-platform field measurement campaign.
- When:
- 13 June – 25 July 2022 (ground intensive)
- 13 June – 7 July 2022 (aircraft intensive)
- Where: Rambouillet Forest (supersite), ATR-42 (aircraft), Paris (urban site), SIRTA
- Who: Researchers from LISA and partners throughout France, Europe, and the world
- What: Make state-of-the-art measurements of gases and aerosol properties
- Why: To learn more about the effect of urban air on biogenic organic compound chemistry and vice versa
![](https://across.cnrs.fr/wp-content/uploads/2021/09/IMG_2168-683x1024.jpg)
![](https://across.cnrs.fr/wp-content/uploads/2020/03/IMG_20200214_101231230_HDR-768x1024.jpg)
![](https://across.cnrs.fr/wp-content/uploads/2020/04/ACROSS-Rambouillet-Tower-Google-Earth-1-1024x664.jpg)
Ground-based image (L), photo from the top (C), and a Google Earth image (R) of the tower in the Rambouillet Forest
- Left and center photos C. Cantrell (2021, 2020).
- Right image Google Earth Pro, V 7.3.2.5776 (5 March 2019). Near La Boissiere-Ecole, France. 48.7 N, 1.7 E, Eye altitude 422 m.