orig_lagranto_traj/;     Backward trajectories SOURCE: Lagranto http://iacweb.ethz.ch/staff//sprenger/lagranto/
orig_moisture_sources/;  Moisture source diagnostic tool SOURCE: Franziska Aemisegger 
precip_R/:               precipitation field from ECMWF forecast retrived by Heini Wernli at ETH.

SOURCE: Franziska Aemisegger and Heini Wernli at ETH