Cold Winters

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  1. Does all this cold weather mean there will be fewer mosquitoes next summer? | Popular Science
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Does all this cold weather mean there will be fewer mosquitoes next summer? | Popular Science

They also go through diapause—kind of like hibernation—where their metabolism slows while they wait for warmer weather to return. It is open to the environment, but a little bit protected. Not all mosquitoes have the same adaptations, and this is where there might be a glimmer of hope for your weary, insect-dreading soul. Some bugs that have made inroads into colder regions from warmer places might be killed off by this deep freeze. That includes some mosquitoes, and perhaps even the dreaded lone star tick whose territory is expanding with rising global temperatures their bites can leave you allergic to meat for life, so this is definitely good news.

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This cold spell might give some regions of the country a slight reprieve from pests that have invaded from elsewhere, but that remains to be seen. But if we do get a few warm days after this Arctic blast, stay cautious. You might want to throw on a T-shirt and shorts and go frolicking through the woods as soon as temperatures rise above fifty degrees.

Meteorological reckoning is the method of measuring the winter season used by meteorologists based on "sensible weather patterns" for record keeping purposes, [5] so the start of meteorological winter varies with latitude.

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The coldest average temperatures of the season are typically experienced in January or February in the Northern Hemisphere and in June, July or August in the Southern Hemisphere. Nighttime predominates in the winter season, and in some regions winter has the highest rate of precipitation as well as prolonged dampness because of permanent snow cover or high precipitation rates coupled with low temperatures, precluding evaporation. Blizzards often develop and cause many transportation delays. As a result, the coldest January on record in was also the sunniest in Stockholm. Accumulations of snow and ice are commonly associated with winter in the Northern Hemisphere, due to the large land masses there.

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In this region, snow occurs every year in elevated regions such as the Andes, the Great Dividing Range in Australia, and the mountains of New Zealand, and also occurs in the southerly Patagonia region of South Argentina. Snow occurs year-round in Antarctica. In the Northern Hemisphere , some authorities define the period of winter based on astronomical fixed points i. In one version of this definition, winter begins at the winter solstice and ends at the vernal equinox. Astronomically, the winter solstice, being the day of the year which has fewest hours of daylight, ought to be in the middle of the season, [14] [15] but seasonal lag means that the coldest period normally follows the solstice by a few weeks.

In some cultures, the season is regarded as beginning at the solstice and ending on the following equinox [16] [17] — in the Northern Hemisphere, depending on the year, this corresponds to the period between 21 or 22 December and 19, 20 or 21 March. In the UK, meteorologists consider winter to be the three coldest months of December, January and February. In Celtic nations such as Ireland using the Irish calendar and in Scandinavia, the winter solstice is traditionally considered as midwinter, with the winter season beginning 1 November, on All Hallows , or Samhain.

How to get motivated on a cold winter’s day

Winter ends and spring begins on Imbolc , or Candlemas , which is 1 or 2 February. This system of seasons is based on the length of days exclusively. The three-month period of the shortest days and weakest solar radiation occurs during November, December and January in the Northern Hemisphere and May, June and July in the Southern Hemisphere.

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Also, many mainland European countries tended to recognize Martinmas or St. Martin's Day 11 November , as the first calendar day of winter. Also, Valentine's Day 14 February is recognized by some countries as heralding the first rites of spring, such as flowers blooming. The three-month period associated with the coldest average temperatures typically begins somewhere in late November or early December in the Northern Hemisphere and lasts through late February or early March.

Does all this cold weather mean there will be fewer mosquitoes next summer?

This "thermological winter" is earlier than the solstice delimited definition, but later than the daylight Celtic definition. Depending on seasonal lag , this period will vary between climatic regions. Cultural influences such as Christmas creep may have led to the winter season being perceived as beginning earlier in recent years, although high latitude countries like Canada are usually well into their real winters before the December solstice.

Since by almost all definitions valid for the Northern Hemisphere, winter spans 31 December and 1 January, the season is split across years, just like summer in the Southern Hemisphere. Each calendar year includes parts of two winters. This causes ambiguity in associating a winter with a particular year, e. Solutions for this problem include naming both years, e.

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Ecological reckoning of winter differs from calendar-based by avoiding the use of fixed dates. It is one of six seasons recognized by most ecologists who customarily use the term hibernal for this period of the year the other ecological seasons being prevernal, vernal, estival, serotinal, and autumnal. The appearance of flowering plants like the crocus can mark the change from ecological winter to the prevernal season as early as late January in mild temperate climates. To survive the harshness of winter, many animals have developed different behavioral and morphological adaptations for overwintering:.

Some annual plants never survive the winter. Other annual plants require winter cold to complete their life cycle; this is known as vernalization. As for perennials , many small ones profit from the insulating effects of snow by being buried in it. Larger plants, particularly deciduous trees , usually let their upper part go dormant, but their roots are still protected by the snow layer.

Few plants bloom in the winter, one exception being the flowering plum , which flowers in time for Chinese New Year. The process by which plants become acclimated to cold weather is called hardening. Humans evolved in tropical climates, and met cold weather as they migrated into Eurasia , although earlier populations certainly encountered Southern Hemisphere winters in Southern Africa.

Micro-evolution in Caucasian, Asiatic and Inuit people show some adaptation to the climate. Humans are sensitive to cold, see hypothermia.

Nonlinear response of mid-latitude weather to the changing Arctic, Nature Climate Change Professor Edward Hanna and PhD student Richard Hall, from the University of Sheffield's Department of Geography, are part of a select group of international climate scientists investigating links between Arctic climate change A decrease in storm activity over large parts of the US, Europe, Russia, and China is found to influence weather extremes—cold ones in winter, hot or dry ones in summer.

This is now shown in a study by scientists from the Findings from a new Rutgers University climate change study support previous research that shows a link between the rapidly warming Arctic and an increase in extreme weather events.

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In it, he theorizes that heavy thunderstorms Federal forecasters predict this winter may paint the U. Warmer and drier than normal in the south, and colder and wetter than usual in the far north. The Gulf of St. Lawrence has warmed and lost oxygen faster than almost anywhere else in the global oceans. The broad, biologically rich waterway in Eastern Canada drains North America's Great Lakes and is popular with fishing Scientists have observed for years that the Earth's tropics are widening in connection with complex changes in climate and weather patterns.

But in recent years, it appeared the widening was outpacing what models predicted,