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Whiteout (weather)
Whiteout, white-out, or milky weather is a weather condition in which the contours and landmarks in a snow-covered zone become almost indistinguishable. It could be also applied when visibility and contours are greatly reduced by sand. The horizon disappears from view while the sky and landscape appear featureless, leaving no points of visual reference by which to navigate; there is absence of shadows because the light arrives in equal measure from all possible directions. Whiteout has been defined as: "A condition of diffuse light when no shadows are cast, due to a continuous white cloud layer appearing to merge with the white snow surface. No surface irregularities of the snow are visible, but a dark object may be clearly seen. There is no visible horizon." A whiteout may be due simply to extremely heavy snowfall rates as seen in lake effect conditions, or to other factors such as diffuse lighting from overcast clouds, mist or fog, or a background of snow. A person traveling ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pole Line (413157823)
Pole may refer to: Astronomy *Celestial pole, the projection of the planet Earth's axis of rotation onto the celestial sphere; also applies to the axis of rotation of other planets *Pole star, a visible star that is approximately aligned with the Earth's axis of rotation *Orbital pole, the projection of the line perpendicular to planet Earth's orbit onto the celestial sphere; also applies to the orbit of other planets *Poles of astronomical bodies, concepts analogous to the Earth's geographic and magnetic poles on other planets and Solar System bodies Cylindrical objects A solid cylindrical object or column with its length greater than its diameter, for example: *Asherah pole, a sacred tree or pole that stood near Canaanite religious locations to honor the Ugaritic mother-goddess Asherah, consort of El *Barber's pole, advertising the barber shop *Ceremonial pole or festival pole symbolizes a variety of concepts in several different cultures *Fireman's pole, wooden pole or a meta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White-out Hg
Whiteout (including variants white out or white-out) may refer to: Arts, entertainment, and media Fictional characters * Whiteout (G.I. Joe), a fictional character in the G.I. Joe universe * Whiteout (Marvel Comics), a comic book supervillain Films * ''Whiteout'' (2009 film), based on the comic book * ''Whiteout'' (2000 film), a Japanese film directed by Setsurou Wakamatsu Music Albums * ''White Out'' (album), a 2000 album by American band Verbow * ''Whiteout'' (album), a 2000 album by rock band Boss Hog * ''Whiteout'' (EP), a 2012 song and eponymous EP by Dawn Richard Songs * "White Out", a 2014 song by Amy Lee featuring Dave Eggar from the album ''Aftermath'' * "Whiteout", a song by Killing Joke on the 1994 album '' Pandemonium'' Groups * White Out (band), an American experimental rock group * Whiteout (band), a Scottish rock group Literature * ''Whiteout'' (Judge Dredd novel), a 2005 novel by James Swallow * ''Whiteout'' (Follett novel), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Road Hazards
Road debris, a form of road hazard, is debris on or off a road. Road debris includes substances, materials, and objects that are foreign to the normal roadway environment. Debris may be produced by vehicular or non-vehicular sources, but in all cases it is considered litter, a form of solid waste., AAA Foundation for Traffic Safety press release o"The Safety Impact of Vehicle-Related Road Debris" Gerry Forbes and John Robinson, June 2004 Debris may tend to collect in areas where vehicles do not drive, such as on the edges (shoulder), around traffic islands, and junctions. Road spray or tire kickup is road debris (usually liquid water) that has been kicked up, pushed out, or sprayed out from a tire. In 2004, a AAA Foundation for Traffic Safety study revealed that vehicle-related road debris caused 25,000 accidents and nearly 100 deaths a year. Causes Road debris can be caused by various factors, including objects falling off vehicles or natural disasters and weather, specifical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snow Or Ice Weather Phenomena
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] |
Weather Hazards
Severe weather is any dangerous meteorological phenomenon with the potential to cause damage, serious social disruption, or loss of human life. Types of severe weather phenomena vary, depending on the latitude, altitude, topography, and atmospheric conditions. High winds, hail, excessive precipitation, and wildfires are forms and effects of severe weather, as are thunderstorms, downbursts, tornadoes, waterspouts, tropical cyclones, and extratropical cyclones. Regional and seasonal severe weather phenomena include blizzards (snowstorms), ice storms, and duststorms. Extreme weather phenomena which cause extreme heat, cold, wetness or drought often will bring severe weather events. One of the principal effects of anthropogenic climate change is changes in severe and extreme weather patterns. Terminology Meteorologists have generally defined severe weather as any aspect of the weather that poses risks to life, property or requires the intervention of authorities. A narrower de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snowsquall
A snowsquall, or snow squall, is a sudden moderately heavy snowfall with blowing snow and strong, gusty surface winds. It is often referred to as a whiteout and is similar to a blizzard but is localized in time or in location and snow accumulations may or may not be significant. Types There are two primary types of snowsqualls: lake effect and frontal. Lake-effect snow When arctic air moves over large expanses of warmer open waters in winter, convective clouds develop which cause heavy snow showers due to the large amount of moisture available. This occurs southwest of extratropical cyclones, with the curved cyclonic wind flow bringing cold air across the relatively warm Great Lakes which then leads to narrow lake-effect snow bands that can produce significant localized snowfall. Whiteout conditions will affect narrow corridors from shores to inland areas aligned along the prevailing wind direction. This will be enhanced when the moving air mass is uplifted by higher eleva ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black Ice
Black ice, sometimes called clear ice, is a thin coating of glaze ice on a surface, especially on streets. The ice itself is not black, but visually transparent, allowing the often black road below to be seen through it. The typically low levels of noticeable ice pellets, snow, or sleet surrounding black ice means that areas of the ice are often practically invisible to drivers or people stepping on it. There is, thus, a risk of slippage and subsequent accident due to the unexpected loss of traction. Definitions The term "black ice" in the United States is defined by the National Weather Service as "patchy ice on roadways or other transportation surfaces that cannot easily be seen. It is often clear (not white) with the black road surface visible underneath. It is most prevalent during the early morning hours, especially after snowmelt on the roadways has a chance to refreeze overnight when the temperature drops below freezing. Black ice can also form when roadways are slick ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antarctica
Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest continent, being about 40% larger than Europe, and has an area of . Most of Antarctica is covered by the Antarctic ice sheet, with an average thickness of . Antarctica is, on average, the coldest, driest, and windiest of the continents, and it has the highest average elevation. It is mainly a polar desert, with annual precipitation of over along the coast and far less inland. About 70% of the world's freshwater reserves are frozen in Antarctica, which, if melted, would raise global sea levels by almost . Antarctica holds the record for the lowest measured temperature on Earth, . The coastal regions can reach temperatures over in summer. Native species of animals include mites, nematodes, penguins, seals and tardigrades. Where vegetation o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Erebus
Mount Erebus () is the second-highest volcano in Antarctica (after Mount Sidley), the highest active volcano in Antarctica, and the southernmost active volcano on Earth. It is the sixth-highest ultra mountain on the continent. With a summit elevation of , it is located in the Ross Dependency on Ross Island, which is also home to three inactive volcanoes: Mount Terror, Mount Bird, and Mount Terra Nova. The volcano has been active since about 1.3 million years ago and has a long-lived lava lake in its inner summit crater that has been present since at least the early 1970s. The volcano was the site of the Air New Zealand Flight 901 accident, which occurred in November 1979. Geology and volcanology Mount Erebus is the world's southernmost active volcano. It is the current eruptive centre of the Erebus hotspot. The summit contains a persistent convecting phonolitic lava lake, one of five long-lasting lava lakes on Earth. Characteristic eruptive activity consists of Str ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Air New Zealand Flight 901
The Mount Erebus disaster occurred on 28 November 1979 when Air New Zealand Flight 901 (TE-901) flew into Mount Erebus on Ross Island, Antarctica, killing all 237 passengers and 20 crew on board. Air New Zealand had been operating scheduled Antarctic sightseeing flights since 1977. This flight was supposed to leave Auckland Airport in the morning and spend a few hours flying over the Antarctic continent, before returning to Auckland in the evening via Christchurch. The initial investigation concluded the accident was caused primarily by pilot error, but public outcry led to the establishment of a Royal Commission of Inquiry into the crash. The commission, presided over by Justice Peter Mahon QC, concluded that the accident was primarily caused by a correction made to the coordinates of the flight path the night before the disaster, coupled with a failure to inform the flight crew of the change, with the result that the aircraft, instead of being directed by computer down McMur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Multiple-vehicle Collision
A multiple vehicle collision (colloquially known as a pile-up, multi-car collision, multi-vehicle collision, or simply a multi) is a road traffic collision involving many vehicles. Generally occurring on high-capacity and high-speed routes such as freeways, they are one of the deadliest forms of traffic collisions. The most disastrous pileups have involved more than a hundred vehicles. Terminology A chain collision can be defined as "an accident involving 3 or more vehicles in which one vehicle has only rear impact damage (i.e., the "lead" vehicle); one vehicle has only frontal damage; and all other vehicles have frontal and rear impact damage (these are the "middle" vehicles)".Report No DOT HS 807 076, THE EFFECTIVENESS OF CENTER HIGH MOUNTED STOP LAMPS, A PRELIMINARY EVALUATION, March 1987, Charles J . Kahane, Ph.D., Office of Standards Evaluation, National Highway Traffic Safety Administration, Washington, D.C. 20590 Statistics British statistics In Great Britain, stat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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