Research On Characteristics Of Snow In The Snowmelt Period

Snow liquid water content, density and the snow layer temperature of the shadyand sunny slope were measured by The automatic meteorological instrumentDELTA-T and a portable instrument(TOIKKAoy) in Tianshan Research Stationduring the snowmelt period from Mar10,2011to Mar24,2011and Mar10,2012toMar22,2012and Mar10,2013to Mar19,2013.The time variation and verticalvariation of the density of the snow layer, snow liquid water content and temperatureof the snow layer and their relationships with deep snow, wind speed, air pressure, airtemperature, air humidity, dew temperature (DP), wet-bulb temperature (WB) wereanalyzed. The results show that the whole Sunny slope’s changes of the temperaturein snow melt of the snow layer is greater than in the Shady slope. The averagetemperature of the pre Sunny snow layer is greater than the pre Shady slope, late itturn over. Average temperature in Shady and Sunny slope, the top layer is the highestand the lowest is the middle one. The temperature gradient of the Shady value isnegative, the Sunny slope is positive. The Sunny snow layer’s average moisturecontent is greater than in Shady. The low layer of the snow is the highest in the shadyand sunny slope and the top layer is the middle one. The gradient of the snowmeltmoisture content is negative in the sunny slope and positive in the shady slope.Density gradient in snowmelt time is grow with the time goes on. Average density ofsunny slopes is greater than shady slope. Sunny slopes can have a greater value thanin the shady slope. The shady slope density Daily inflection point earlier than thesunny2h.As the snow melts, PH value increases.The average PH value of theunderlying snowlayer is greater than the surface. As the snow melts,the value ofconductivity decreases.The difference between each layer of snow late also reduced.The value of shady slope PH and EC correlation is greater than the sunny slope. Through simulation, find out the suitable AMSR-E passive microwave remote sensingdata inversion of snow depth, snow surface temperature model in the experimentationarea.