Asian tiger mosquito gains ground in Illinois

Researchers report that the Asian tiger mosquito, Aedes albopictus, has become more abundant across Illinois in the past three decades. Its spread is problematic, as the mosquito can transmit diseases—like chikungunya or ...

Jeddah gets caught in the rain

Urbanization could cause 26 percent more rain to fall over Jeddah city than over the surrounding desert during storms.

Climate change could dramatically reduce U.S. snowstorms

A new study led by Northern Illinois University scientists suggests American winters late this century could experience significant decreases in the frequency, intensity and size of snowstorms.

Arctic wildlife uses extreme method to save energy

Researchers from Lund University and the University of Tromsø have examined the immune system strength of the Svalbard rock ptarmigan in the Arctic. This bird lives the farthest up in the Arctic of any land bird, and the ...

Shrinking instead of growing: How shrews survive the winter

Common shrews have one of the highest metabolic rates among mammals. They must therefore consume a considerable amount of energy for their relatively low body weight. Because their fat reserves are quickly used up, they often ...

Discovery of a drug to rescue winter depression-like behavior

A group of animal biologists and chemists at the Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, has used a chemical genomics approach to explore the underlying mechanism of winter depression-like ...

Greenland ice sheet meltwater can flow in winter, too

Liquid meltwater can sometimes flow deep below the Greenland Ice Sheet in winter, not just in the summer, according to CIRES-led work published in the AGU journal Geophysical Research Letters today. That finding means that ...

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Winter

Winter is one of the four seasons of temperate zones. Winter officially begins on the winter solstice, being the day of the year which has fewest hours of daylight. Winter ends, and spring begins, on the following equinox. In the Northern Hemisphere, depending on the year, this corresponds to the period between December 20 and 21 and March 20 or 21. Winter is the season between autumn and spring. In many countries in the Southern Hemisphere, including Australia , New Zealand and South Africa, winter begins on 1 June and ends on 31 August.

From a meteorological perspective, winter is the season with the shortest days and the lowest average temperatures. It has colder weather and, especially in the higher latitudes or altitudes, snow and ice. The coldest average temperatures of the season are typically experienced in January in the Northern Hemisphere and in June or July in the Southern Hemisphere.

This text uses material from Wikipedia, licensed under CC BY-SA