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In the history of artificial intelligence, an AI winter is a period of reduced funding and interest in artificial intelligence research. [1] The field has experienced several hype cycles , followed by disappointment and criticism, followed by funding cuts, followed by renewed interest years or even decades later.
An impact winter is a hypothesized period of prolonged cold weather due to the impact of a large asteroid or comet on the Earth's surface. If an asteroid were to strike land or a shallow body of water, it would eject an enormous amount of dust, ash, and other material into the atmosphere , blocking the radiation from the Sun .
In the United States an extreme cold warning was an experimental weather warning issued by the National Weather Service in North Dakota, South Dakota, and Minnesota. [5] The warning was issued if the temperature fell to −35 °F (−37 °C) or colder with a wind of less than 5 mph (8 km/h; 2 m/s). [6]
The stratospheric polar vortex is an area of high-speed, cyclonically rotating winds around 15 km to 50 km high, poleward of 50°, and is strongest in winter. It forms during autumn when Arctic or Antarctic temperatures cool rapidly as the polar night begins.
Fimbulwinter is the harsh winter that precedes the end of the world and puts an end to all life on Earth. Fimbulwinter is three successive winters, when snow comes in from all directions, without any intervening summer. Innumerable wars follow. The event is described primarily in the Poetic Edda.
Snowpack is an accumulation of snow that compresses with time and melts seasonally, often at high elevation or high latitude. [1] [2] Snowpacks are an important water resource that feed streams and rivers as they melt, sometimes leading to flooding.
Mercury-in-glass thermometer measuring an ambient temperature of 23 °C (73 °F) a little above the normal "room temperature" range. Room temperature, colloquially, denotes the range of air temperatures most people find comfortable indoors while dressed in typical clothing.
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