DOI 10.1016/j.scitotenv.2021.150334 KEYWORDS Surface snow deposition; atmospheric transport; contaminants; antisana; Ecuador; isotopes; wind direction ABSTRACT Microplastic (MPs) contamination is ubiquitous in most terrestrial and aquatic ecosystems. Recently MPs have been reported at high altitudes which indicates that air masses can transport and deposit MPs in the surface snow of high mountain ecosystems, however, whether MPs typification […]