Eyjafjallajokull volcano ash plume detection in the frame of the new constituting Lidar network Leonet

摘要

Eyjafjallajokull volcano eruptions of ash plumes starting on April 2010 paralyzed completely air traffic in Europe for several days. During the crisis, Leosphere collected 24/7 real time measurements of the backscatter profiles, taken by ALS polarizations lidars spread from Denmark to South of France in order to provide quick looks of the sky at regular intervals for different met ag encies and for the Volcanic Ash Advisory Centres (VAAC) coordinated by UK MetOffice. Moreover, Meteo France supported by other institutions such as CNRS (Centre National de la Recherche Scientifique), CE A (Commissariat a l'Energie Atomique), CNES (Centre National d'Études Spatiales) and L eosphere performed several test flights over France a nd N orth Atlantic with an airborne Lidar. These u nique data al lowed detection and identification of ash plume and provided a guidance regarding the decision-making chain. The ash mass concentration and its calculation were also discussed.