In total, 25 events were identified with two events classified as “clear air” flights conducted by the DC-8 to sample land surface emission characteristics.  Table 4 summarizes case date and time, event type, and airborne data collection during the field project.  Event total SWE amounts represent manual measurements taken by a Tretyakov gauge located inside a DFIR wind shield at CARE.  Precipitation types are characterized as rain (R), snow (S), or mixed precipitation that could include ice pellets (R/S).  Synoptic context/regime(s) were determined from the daily synopsis produced by the project weather forecasters and are subdivided as frontal disturbances (F), low pressure passages but without a surface frontal passage (C), upper air feature not reflected in a distinct surface low (U), lake effect events from flows off either Lake Huron or Georgian Bay (L), or a ridge (R; i.e., clear air flight). 

Table 4. GCPEx Case Summary