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Snowboard (meteorology)
A snowboard (US) or weaverboard (Canada) is a meteorological tool used to aid in the obtaining of accurate measurement of snow accumulation. Specifications Snowboards are typically flat pieces of plywood painted a light color (most commonly white), around in length and width and around thick. In addition, the weaverboard used in Canada has a white stick with a black tip placed in the centre. This allows the board to be found if the newly fallen snow was to completely cover the board. Reasons for use When measuring snow in grass, the blades will produce inflated snow totals, whereas with a snowboard, this effect is absent. The light or white color of a snowboard serves to minimize heating by sunlight, which often occurs on paved surfaces. These qualities make snowfall measurement using a snowboard more accurate than measurements without one. Usage Snowboards should be placed at ground level at a distance away from a building of at least two times the height of that building. Whe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snowboard (meteorology)
A snowboard (US) or weaverboard (Canada) is a meteorological tool used to aid in the obtaining of accurate measurement of snow accumulation. Specifications Snowboards are typically flat pieces of plywood painted a light color (most commonly white), around in length and width and around thick. In addition, the weaverboard used in Canada has a white stick with a black tip placed in the centre. This allows the board to be found if the newly fallen snow was to completely cover the board. Reasons for use When measuring snow in grass, the blades will produce inflated snow totals, whereas with a snowboard, this effect is absent. The light or white color of a snowboard serves to minimize heating by sunlight, which often occurs on paved surfaces. These qualities make snowfall measurement using a snowboard more accurate than measurements without one. Usage Snowboards should be placed at ground level at a distance away from a building of at least two times the height of that building. Whe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Environment Canada
Environment and Climate Change Canada (ECCC; french: Environnement et Changement climatique Canada),Environment and Climate Change Canada is the applied title under the Federal Identity Program; the legal title is Department of the Environment (). is the department of the Government of Canada responsible for coordinating environmental policies and programs, as well as preserving and enhancing the natural environment and renewable resources. It is also colloquially known by its former name, Environment Canada (EC; french: Environnement Canada, links=no). The minister of environment and climate change has been Steven Guilbeault since October 26, 2021; Environment and Climate Change Canada supports the minister's mandate to: "preserve and enhance the quality of the natural environment, including water, air, soil, flora and fauna; conserve Canada's renewable resources; conserve and protect Canada's water resources; forecast daily weather conditions and warnings, and provide detaile ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snow
Snow comprises individual ice crystals that grow while suspended in the atmosphere—usually within clouds—and then fall, accumulating on the ground where they undergo further changes. It consists of frozen crystalline water throughout its life cycle, starting when, under suitable conditions, the ice crystals form in the atmosphere, increase to millimeter size, precipitate and accumulate on surfaces, then metamorphose in place, and ultimately melt, slide or sublimate away. Snowstorms organize and develop by feeding on sources of atmospheric moisture and cold air. Snowflakes nucleate around particles in the atmosphere by attracting supercooled water droplets, which freeze in hexagonal-shaped crystals. Snowflakes take on a variety of shapes, basic among these are platelets, needles, columns and rime. As snow accumulates into a snowpack, it may blow into drifts. Over time, accumulated snow metamorphoses, by sintering, sublimation and freeze-thaw. Where the climate is co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plywood
Plywood is a material manufactured from thin layers or "plies" of wood veneer that are glued together with adjacent layers having their wood grain rotated up to 90 degrees to one another. It is an engineered wood from the family of manufactured boards which include medium-density fibreboard (MDF), oriented strand board (OSB) and particle board (chipboard). All plywoods bind resin and wood fibre sheets (cellulose cells are long, strong and thin) to form a composite material. This alternation of the grain is called ''cross-graining'' and has several important benefits: it reduces the tendency of wood to split when nailed at the edges; it reduces expansion and shrinkage, providing improved dimensional stability; and it makes the strength of the panel consistent across all directions. There is usually an odd number of plies, so that the sheet is balanced—this reduces warping. Because plywood is bonded with grains running against one another and with an odd number of composite part ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SYNOP
SYNOP (surface synoptic observations) is a numerical code (called FM-12 by WMO) used for reporting weather observations made by manned and automated weather stations. SYNOP reports are typically sent every six hours by Deutscher Wetterdienst on shortwave and low frequency using RTTY. A report consists of groups of numbers (and slashes where data is not available) describing general weather information, such as the temperature, barometric pressure and visibility at a weather station. It can be decoded by open-source software such as seaTTY, metaf2xml or Fldigi. SYNOP information is collected by more than 7600 manned and unmanned meteorological stations and more than 2500 mobile stations around the world and is used for weather forecasting and climatic statistics. The format of the original messages is abbreviated, some items are coded. Message format Following is the general structure of a SYNOP message. The message consists of a sequence of numeric ''groups'', which may also c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coordinated Universal Time
Coordinated Universal Time or UTC is the primary time standard by which the world regulates clocks and time. It is within about one second of mean solar time (such as UT1) at 0° longitude (at the IERS Reference Meridian as the currently used prime meridian) and is not adjusted for daylight saving time. It is effectively a successor to Greenwich Mean Time (GMT). The coordination of time and frequency transmissions around the world began on 1 January 1960. UTC was first officially adopted as CCIR Recommendation 374, ''Standard-Frequency and Time-Signal Emissions'', in 1963, but the official abbreviation of UTC and the official English name of Coordinated Universal Time (along with the French equivalent) were not adopted until 1967. The system has been adjusted several times, including a brief period during which the time-coordination radio signals broadcast both UTC and "Stepped Atomic Time (SAT)" before a new UTC was adopted in 1970 and implemented in 1972. This change also a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snow Pillow
A snow pillow is a device for measuring snowpack, especially for automated reporting stations such as SNOTEL. The snow pillow measures the water equivalent of the snow pack based on hydrostatic pressure created by overlying snow. Any discrepancy due to bridging is minimized by the large dimension of the pillow, typically . Another application for snow pillows is to estimate the snow weight on a roof to warn of potential for roof collapse. Snow pillows were developed in the early 1960s. Set-up Large dimensions (e.g. 3 m × 3 m) of the pillow prevent any bridging that might occur from having an effect on the measurement readings. For snow pressure measurement on roofs using a smaller snow pillow (e.g. 1 m × 1 m) is the better choice, because of the weight of the filling of the snow pillow. See also *Snowboard *Snow gauge A snow gauge is a type of instrument used by meteorologists and hydrologists to gather and measure the amount of solid precipitation (as opposed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
