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The conversion of sulfur dioxide to sulfuric acid, which condenses rapidly in the stratosphere to form fine sulfate aerosols. A volcanic winter is a reduction in global temperatures caused by droplets of sulfuric acid obscuring the Sun and raising Earth's albedo (increasing the reflection of solar radiation) after a large, sulfur-rich, particularly explosive volcanic eruption.
Winter is the coldest and darkest season of the year in temperate and polar climates.It occurs after autumn and before spring.The tilt of Earth's axis causes seasons; winter occurs when a hemisphere is oriented away from the Sun.
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 .
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Winter smoke in Shanghai, China, with a clear border-layer for the vertical air-spread (1993). A temperature inversion in Bratislava , Slovakia , viewing the top of Nový Most (2005). Inversion-created smog in Nowa Ruda, Poland, 2017 Temperature inversion phenomenon in the early morning near Tawau , Sabah , Malaysia where smoke that was emitted ...
At least three times as much precipitation in the wettest month of winter as in the driest month of summer, and the driest month of summer receives less than 30 mm (1.2 in). Dsc = Mediterranean-influenced subarctic climate; coldest month averaging below 0 °C (32 °F) (or −3 °C (27 °F)) and one–three months averaging above 10 °C (50 °F).
The winter solstice occurs during the hemisphere's winter. In the Northern Hemisphere, this is the December solstice (December 21 or 22) and in the Southern Hemisphere, this is the June solstice (June 20 or 21). Although the winter solstice itself lasts only a moment, the term also refers to the day on which it occurs.