The GWOP project, which stands for Gravity Waves and Orographic Precipitation, has the main objective of studying different meteorological processes that are affected by the presence of relief, such as mountain waves, the formation of rotors and the effects of orography on precipitation processes.

After the experimental and observational campaign GWOP'17 carried out in the Eastern Pyrenees in winter 2017, the processing of all the recorded data (radar, lidar, disdrometer, among others) was started. The observational strategy was designed to characterize two different phenomena: mountain waves and orographic precipitation. During 2020, the detailed observational analysis of the selected case studies was completed, in order to describe how precipitation can be affected when they interact with the phenomenon of mountain waves and has been completed with meteorological modeling.

One of the articles published during 2019 was the analysis and modelling of an episode of mountain high winds with the presence of a rotor. The results of this analysis have been published and are available in the article entitled "Multi sensor observations of an elevated rotor during a mountain wave event in the Eastern Pyrenees" (Udina et al., 2020).

Andorra Research + Innovation collaborates with different institutions at an international level, the Universitat de Barcelona -which leads the project-, MeteoFrance, Agència Estatal de Meteoriologia (AEMET) and Servei Meteorològic de Catalunya. The project is funded by MINECO/FEDER (CGL2015-65627-C3-2-R).