Case: 20 October 2015

Summary

Extensive stratocumulus deck under easterly boundary layer flows

Description

Extended early morning and daytime closed stratocumulus under easterly low-level flow. There were minor, episodic breaks in this cloud field to the north of the ENA main site. A more significant erosion of this cloud deck was observed over the western portion of the larger Azores region that continues into the waning parts of the event (potentially associated with an approaching wave). Inversion height at approximately 1.1 km AGL.

Available assets

Standard ARM profiling assets, SEVIRI, RLPROF-FEX

Critical period: 02:00–04:00

Stratocumulus with increasing radar subcloud drizzle signatures

True color MODIS AQUA — Figure 3 True color afternoon MODIS AQUA image with overlaid LES domains. The image area corresponds to the 5° region sampled for the larger forcing option. The yellow and orange boxes correspond to the sizes of the 25 km and 102 km LES domains, respectively.