I'm interested in measuring the temperature of the snow over its depth. The temperature should be measured in every 20-25 cm over the up to 2 m snow pack.
I know very good book on the subject: S.D. Vinnikov & B.V. Proskuryakov "Hydrophysics", Leningrad,"Hydrometeoizdat", 1988 (unfortunately in Russian)
in which there described the structure of snow and its density. There are several problems and solutions for multi layer matter, for example snow above ice.