Persistent Supercooled Drizzle at Temperatures below -25°C Observed at McMurdo Station, Antarctica.

ABSTRACT: The rarity of reports in the literature of brief and spatially limited observations of drizzle at temperatures below -20°C suggest that riming and other temperature-dependent cloud microphysical processes such as heterogeneous ice nucleation and ice crystal depositional growth prevent drizzle persistence in cold environments. In this study, we report on a persistent drizzle event observed by ground-based remote-sensing measurements at McMurdo Station, Antarctica. The temperatures in the drizzle-producing cloud were below -25°C and the drizzle persisted for a period exceeding 7.5 hours. Using ground-based, satellite, and reanalysis data we conclude that drizzle was likely present in parts of a widespread cloud field, which stretched more than ~1000 km along the Ross Ice Shelf coast. Paramet

SUBMITTER: Silber I 

PROVIDER: S-EPMC7477808 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature