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Dry prominence, on the other hand, ignores water, snow, and ice features and assumes that the surface of the earth is defined by the solid bottom of those features. The dry prominence of a summit is equal to its wet prominence unless the summit is the highest point of a landmass or island, or its key col is covered by snow or ice.
The snow line is measured using automatic cameras, aerial photographs, or satellite images. Because the snow line can be established without on-the-ground measurements, it can be measured in remote and difficult to access areas. Therefore, the snow line has become an important variable in hydrological models. [2]
The frost depth depends on the climatic conditions of an area, the heat transfer properties of the soil and adjacent materials, and on nearby heat sources. For example, snow cover and asphalt insulate the ground and homes can heat the ground (see also heat island). The line varies by latitude, it is deeper closer to the poles.
Another snow sensor called a snow pillow looks like a round bag lying on the ground. Inside the pillow is a liquid such as an environmentally safe [citation needed] antifreeze. Usually the snow pillow will be connected to a manometer. The manometer reading will vary based on how much snow is sitting on the pillow.
All snow is cleaned from the snowboard once every 6 hours. [4] [5] At the end of the snow event, the maximum depths recorded on the snowboard during each 6-hour period are summed to provide the storm total; the same measurements during a single day are summed to produce the daily snowfall total. [5]
Snow Depth-This is a measurement from the snow surface to the ground in meters. It is commonly does over a large time span using immobile graduated stakes. Snow Water Equivalency - A measuring tool which represents the vertical depth of water that would accumulate in an area, if all the snow and ice were melted in that given area.
Snow water equivalent (SWE) is the depth of water that would result if the snow mass melted completely, whether over a given region or a confined snow plot, calculated as the product of the snow height in meters times the vertically-integrated density in kilograms per cubic meter.
The actual temperature and distance for the snow line of water ice depend on the physical model used to calculate it and on the theoretical solar nebula model: this tells us nothing for the temperature in degrees 170 K at 2.7 AU (Hayashi, 1981) [4] 143 K at 3.2 AU to 150 K at 3 AU (Podolak and Zucker, 2010) [5] 3.1 AU (Martin and Livio, 2012) [6]