Gradients of fog and rain along an altitudinal transect (1800 to 3185 m asl) are presented for a tropical
montane forest of southern Ecuador (ECSF area). The investigation is performed with a combination of
satellite and ground based remote sensing, in-situ measurements and numerical models. The ECSF area is
characterised by above-average cloudiness and an increase of rainfall and fog water intake with height.
Even if concentrations of soluted matters are generally low, an increase of e.g. sulfate concentrations can be
observed during special events as e.g. volcanic eruptions.