The Relationship between Manual and Geonor Automatic Gauge Measurements of Solid Precipitation in DFIR Shields during SPICE

The World Meteorological Organization (WMO) Solid Precipitation Intercomparison Experiment (SPICE) aims to make recommendations for an automated field reference system for solid precipitation measurements, and is expected to be completed by 2015. As a part of this project, a standard Double Fence Intercomparison Reference (DFIR) with a manual Tretyakov gauge (the ‘R1 reference') and an automatic field reference with a Geonor T-200B3 gauge within a DFIR shield (the ‘R2 reference') were installed at the Centre for Atmospheric Research Experiments (CARE) field measurement site in Egbert, Ontario, Canada. This paper presents analysis of the relationship between the R1 and R2 reference systems for measurements of solid precipitation, based on data from the winter of 2012-2013. This work is intended to establish a link between the manual and Geonor automatic gauge measurements within the DFIR.