Fact-checked by Grok 2 weeks ago
References
-
[1]
What Causes the Seasons? | NASA Space Place – NASA Science for Kids### Key Facts About Winter Season
-
[2]
The Seasons, the Equinox, and the SolsticesThe winter solstice marks the shortest day and longest night of the year. In the Northern Hemisphere, it occurs when the sun is directly over the Tropic of ...Missing: characteristics | Show results with:characteristics
-
[3]
What's the difference between meteorological and astronomical ...Sep 22, 2016 · Astronomical seasons are based on the position of Earth in relation to the sun, whereas the meteorological seasons follow the calendar year and are based on ...Missing: characteristics | Show results with:characteristics
-
[4]
The Varying Types of Winter WeatherThe winter season brings a variety of adverse weather extremes. You may experience heavy snow, ice accumulation, freezing temperatures and wind chill.Missing: definition meteorological
-
[5]
[PDF] Winter Ecology Teacher Guide - National Park ServiceThe SWE is significant to scientists because it enables them to track changes in snowpack over time and therefore changes in climate, as well as immediate.
-
[6]
Marking the winter solstice, from Neolithic times to todayDec 20, 2018 · For millennia, people have marked the winter solstice with rituals and celebrations—and they continue to do so today.Missing: significance | Show results with:significance
-
[7]
Plants of the Winter Solstice | US Forest ServiceIn ancient cultures, the holly tree symbolized the waning sun commencing with the summer solstice and the oak tree symbolized the waxing sun commencing with the ...Plants Of The Winter... · Deck The Halls With Boughs... · The Yule TreeMissing: significance | Show results with:significance<|control11|><|separator|>
-
[8]
Meteorological Versus Astronomical Seasons | NewsSep 22, 2016 · Meteorologists and climatologists define seasons differently from “regular” or astronomical spring, summer, fall, and winter.
-
[9]
Winter - Etymology, Origin & MeaningWinter, from Old English and Proto-Germanic *wintruz, means the coldest season; its origin is uncertain, possibly linked to "windy" or "white" season roots.<|control11|><|separator|>
-
[10]
Why Do We Have Seasons? - National Weather ServiceWhen the earth's axis points towards the sun, it is summer for that hemisphere. When the earth's axis points away, winter can be expected. Since the tilt of the ...Missing: definition | Show results with:definition
-
[11]
Winter Precipitation Types - National Weather ServiceIn order for the surface precipitation type to be snow, the atmospheric temperature (dashed red line in Figure 1) must be at or below 32°F (0°C) to ensure that ...Missing: average | Show results with:average<|control11|><|separator|>
-
[12]
Winter WxWinter precipitation includes rain, sleet, and snow. Sleet forms from snow re-freezing, and freezing rain forms when rain freezes on contact with cold surfaces.
-
[13]
Meteorological and Astronomical Seasons: Southern Hemisphere ...Astronomical seasons: Winter begins on the winter solstice (Jun. 21) when the South Pole is tilted to the max extent away from the sun, spring begins on the ...Missing: characteristics | Show results with:characteristics
-
[14]
What Causes the Seasons? | NASA Space PlaceIt is winter in December in the Northern Hemisphere, because that is when it is the South Pole's turn to be tilted toward the Sun. Earth's lopsided orbit.Missing: characteristics | Show results with:characteristics
-
[15]
The Four Seasons - NASA Scientific Visualization StudioNov 29, 2012 · It's no secret that the 23.5 degree tilt of Earth's axis causes the amount of sunlight that reaches the planet's surface to change throughout ...
-
[16]
What Causes the Seasons? - National Weather ServiceThe seasons are caused by the Earth being tilted on its axis by an average of 23.5 degrees (Earth's tilt on its axis actually varies from near 22 degrees to 24 ...
-
[17]
Milutin Milankovitch - NASA Earth ObservatoryMar 24, 2000 · As the axial tilt increases, the seasonal contrast increases so that winters are colder and summers are warmer in both hemispheres. Today, the ...
-
[18]
Solstice Animations - NASA SVSJun 20, 2023 · The winter solstice occurs when Earth's tilt away from the Sun is at a maximum and the Sun is directly over The Tropic of Capricorn, which is ...
-
[19]
Why does Earth have Seasons? | NESDIS - NOAAIf you live in the Southern Hemisphere, the sun will be more northerly in the sky during the winter (that is, June, July, and August).Missing: definition | Show results with:definition
-
[20]
December Solstice Brings Winter, Summer Seasons - NASADec 20, 2021 · Although the tilt of the Earth as compared to the plane of its orbit around the Sun is more or less constant (23.5˚), at the December solstice, ...
-
[21]
Perihelion and Aphelion 2024 / 2025 - Time and DateThe Earth is closest to the Sun, or at the perihelion, about two weeks after the December solstice, when it is winter in the Northern Hemisphere.
-
[22]
Earth's Aphelion Isn't the Reason for the Seasons | Scientific AmericanJun 30, 2023 · The real reason for the seasons is that Earth's spin axis is tilted by about 23 degrees, compared with the plane of its orbit.
-
[23]
Understanding the Arctic polar vortex### Summary of Polar Vortex Dynamics and Arctic Air Outbreaks
-
[24]
Winter Weather Types - NOAA National Severe Storms LaboratoryA winter storm is a combination of heavy snow, blowing snow and/or dangerous wind chills. A winter storm is life-threatening. Blizzards are dangerous winter ...Missing: characteristics | Show results with:characteristics
-
[25]
Inversion | US EPAOct 1, 2025 · In a temperature inversion, the situation “inverts,” and cold air at the surface gets trapped under a layer of warmer air. During the winter, ...Missing: traps | Show results with:traps
-
[26]
Weather Glossary: W's - NOAAApr 17, 2023 · Therefore, the wind makes it FEEL much colder. If the temperature is 0°F (-18°C) and the wind is blowing at 15 mph (24 km/h), the wind chill ...Missing: amplifies perceived via explanation
-
[27]
U.S. Climate Normals - National Centers for Environmental InformationThe U.S. Climate Normals are a large suite of data products that provide information about typical climate conditions for thousands of locations across the ...Missing: daylight | Show results with:daylight
-
[28]
Season map - SMHIWinter temperature is daily mean temperature 0.0°C or below, but not yet for 5 consecutive days. The winter arrival date refers to the first day out of 5 with ...Missing: thermal | Show results with:thermal
-
[29]
Wetter und Klima - Deutscher Wetterdienst - Explanations - Frost daysA frost day is a day on which the minimum air temperature is below freezing (less than 0.0°C). The maximum air temperature is not taken into account.
-
[30]
Frost Days | Indicators - Climate-ADAPT - European UnionFrost days are the number of days with daily minimum temperatures below 0°C, mainly used in agriculture to account for frost damages.Missing: winter | Show results with:winter
-
[31]
What Are Heating and Cooling Degree DaysDegree days are the difference between the daily temperature mean, (high temperature plus low temperature divided by two) and 65°F.
-
[32]
NOAA's New Satellite Tool Enhances Winter Weather WarningsFeb 7, 2025 · This tool, which taps into imagery and data from NOAA's GOES and JPSS satellites, helps the NWS better identify where two wintertime dangers— ...
-
[33]
Remote Sensing of Snow CoverMar 12, 2024 · Satellites are well suited to the measurement of snow cover because the high albedo of snow presents a good contrast with most other natural surfaces except ...
-
[34]
December Solstice 2025: Longest & Shortest Day - Time and DateJan 13, 2025 · The December Solstice in the Calendar. The December solstice can be on December 20, 21, 22, or 23. December 21 or 22 solstices happen more often ...
-
[35]
Seasons: Dates of Spring, Summer, Fall & Winter - Time and DateThe Seasons Calculator shows the times and dates of Vernal (Spring) & Autumnal (Fall) equinoxes and Summer and Winter solstices all over the world.
-
[36]
When Do Seasons Start and End? - Time and Datespring runs from March 1 to May 31; · summer runs from June 1 to August 31; · fall (autumn) runs from September 1 to November 30; and · winter runs from December 1 ...Winter Solstice · Spring Equinox · Fall Equinox · The Equinoxes and the SolsticesMissing: Gregorian | Show results with:Gregorian
-
[37]
11 Facts About the Month of Tevet Every Jew Should KnowTevet is the 10th, 29-day winter month. It has a fast on the 10th, and the siege of Jerusalem began in it. The name means "sinking".
-
[38]
Months of the Jewish YearThe Jewish Months (And When They Usually Fall). Shevat. Shevat ... Pronounced: TEH-vut, Origin: Hebrew, Jewish month usually coinciding with December-January.
-
[39]
7 Winter Solstice Celebrations From Around the World - BritannicaOct 18, 2025 · Dong Zhi. Dong Zhi ... Based on the traditional Chinese celestial calendar, the holiday generally falls between the 21st and 23rd of December.Missing: lunar | Show results with:lunar
- [40]
-
[41]
Roman republican calendar | Julian reform, lunar-solar cycle, leap ...Oct 11, 2025 · The Roman ruler Numa Pompilius is credited with adding January at the beginning and February at the end of the calendar to create the 12-month ...
-
[42]
The Roman Calendar - Time and DateTo account for the days of winter between the years, two additional months were introduced: Ianuarius and Februarius.
-
[43]
Why Does the New Year Start on January 1? | BritannicaOct 8, 2025 · In many countries the New Year begins on January 1. However, this wasn't always the case. In fact, for centuries, other dates marked the start of the calendar.
-
[44]
Phenology of Photosynthesis in Winter‐Dormant Temperate and ...Apr 27, 2024 · This contrasts with temperate and boreal evergreen forests, where photosynthesis begins as trees emerge from winter dormancy (Bowling et al., ...
-
[45]
Winter dormancy in trees - PubMedJun 20, 2022 · To enter dormancy, vegetative growth is stopped in the late summer or early autumn and the shoots are converted into buds, where the shoot ...
-
[46]
Plant adaptation to cold climates - PMC - PubMed Central - NIHNov 25, 2016 · Gradual low temperature constraints affect the growth process (meristems) long before they affect photosynthetic carbon gain. Hence, plants ...
-
[47]
Winter dormancy in trees - ResearchGateAug 7, 2025 · ... In the frigid winter months, ambient temperature and sunlight are low; hence, photosynthetic conversion is limited. Most deciduous trees in ...
-
[48]
Nature's Most Impressive Animal MigrationsApr 11, 2024 · Migration is a natural phenomenon observed in species across the animal kingdom, from the tiniest insects to the gargantuan blue whale (Balaenoptera musculus).
-
[49]
Ecology of animal migration - ScienceDirect.comSep 10, 2018 · Extremely long migrations are completed annually by whales between calving areas in warmer waters and feeding areas at higher latitudes in ...
-
[50]
Temporal and demographic variation in partial migration of the North ...Jan 23, 2019 · Baleen whales are known to migrate from high-latitude, summer feeding areas of high productivity to low-latitude, winter breeding areas where ...
-
[51]
Climate Change Indicators: Lake Ice | US EPAIf lakes remain frozen for longer periods, it can signify that the climate is cooling. Conversely, shorter periods of ice cover suggest a warming climate.
-
[52]
Environmental and societal consequences of winter ice loss from lakesOct 11, 2024 · Ice loss will affect culture, economy, water quality, fisheries, and biodiversity, as well as weather and climate.
-
[53]
Science of Frozen Ground | National Snow and Ice Data CenterWhen ground temperatures drop to 0°C (32°F), the water trapped in sediment, soil, and pores of rocks turns to ice. Once frozen, it is considered frozen ground.
-
[54]
Why Frozen Ground Matters | National Snow and Ice Data CenterPermafrost contains lots of organic matter like frozen plants and, occasionally, animals within, it holds an enormous amount of carbon.Why It Matters · Frozen Ground And People · Impacts Of Climate Change On...<|control11|><|separator|>
-
[55]
How Do Trees Survive in Winter? - Let's Talk ScienceMar 16, 2020 · Deciduous trees lose their leaves in the winter. Coniferous trees typically do not lose their leaves in winter. Their leaves, often called “needles,” stay on ...
-
[56]
Surviving the winter: 1.4.1 Deciduous trees | OpenLearnDeciduous trees avoid these problems in winter by dropping all their leaves and shutting off photosynthesis. Before they do so, they dismantle the ...<|separator|>
-
[57]
Winter Adaptations of TreesMost conifers retain needles for two to three years before shedding them. ... This allows branches to reach snow-shedding angles with less bending. Longer ...
-
[58]
Why don't evergreen trees change color and drop their leaves?Nov 1, 2019 · Thin, often drooping conifer needles catch less snow than the broad leaves of deciduous trees. Indeed, when deciduous trees lose branches to ...Missing: retention | Show results with:retention
-
[59]
[PDF] Antifreeze proteins enable plants to survive in freezing conditionsOct 20, 2014 · Overwintering plants secrete antifreeze proteins (AFPs) to provide freezing tolerance. These proteins bind to and inhibit the growth of ice ...
-
[60]
Cold adaptation strategies in plants—An emerging role of ...Aug 25, 2022 · Antifreeze proteins and their role in cold tolerance. To survive in freezing stress, cold-hardy plants produce a specific type of protein called ...
-
[61]
Metabolic reprogramming involving glycolysis in the hibernating ...May 6, 2019 · Bears hibernate with only moderate hypothermia but with a drop in metabolic rate down to ~ 25% of basal metabolism.
-
[62]
Do Bears Really Hibernate? - National Forest FoundationDuring hibernation an animal lowers its body temperature, slows its breathing rate, heart rate, and metabolic rate-the rate its body uses energy.
-
[63]
Rare and Opportunistic Use of Torpor in Mammals—An Echo ... - NIHTorpor was traditionally seen as a winter survival mechanism employed by animals living in cold and highly seasonal habitats.
-
[64]
Saving energy via short and shallow torpor bouts - ScienceDirect.comAfrican lesser bushbabies use regular short and shallow bouts of torpor. · Torpor bouts occurred only on cold days between June and August (austral winter).
-
[65]
Willow Ptarmigan - American Bird ConservancyFeather-covered feet help the ptarmigan ... This hardy bird readily burrows into the snow, both for insulation and for protection from predators while it sleeps.Missing: fur | Show results with:fur
-
[66]
Get Wild: Ptarmigan, the Alpine master of disguise | SummitDaily.comDec 17, 2021 · But in winter, ptarmigan feathers transform to be completely white, becoming almost indistinguishable from their snowy surroundings. Another ...
-
[67]
Diapause and quiescence: dormancy mechanisms that contribute to ...Jun 26, 2017 · Diapause can occur in different phases of the mosquito life-cycle, i.e. in the embryo (pharate larvae inside the egg), larval and adult stages.
-
[68]
Dehydration in dormant insects - ScienceDirect.comMany other features of insects in diapause that are linked to dehydration resistance have already been referred to, such as reductions in body water content, ...
-
[69]
Respiratory Illnesses Data Channel - CDCCOVID-19 activity has peaked and is declining in many areas of the country, but emergency department visits and hospitalizations are elevated nationally.Respiratory Virus Activity Levels · Severe Viral Respiratory Illness · FluView
-
[70]
Reduce Your Risk from Respiratory Viruses This Holiday SeasonNov 20, 2024 · Several different respiratory viruses spread more during fall and winter, including those that cause flu, COVID-19, and RSV illness.
-
[71]
Seasonal Affective Disorder - National Institute of Mental Health - NIHSince the 1980s, light therapy has been a mainstay for treating winter-pattern SAD. It aims to expose people with SAD to a bright light to make up for the ...Missing: Mayo | Show results with:Mayo
-
[72]
Work-Related Injuries Associated with Falls During Ice Storms - CDCOf the 53 injuries, 39 (74%) resulted from falls on ice on NIH campuses, including all seven fractures (four coccygeal and three upper extremity), 15 (63%) ...
-
[73]
Risk of Fall-Related Injury due to Adverse Weather Events ... - NIHJul 10, 2017 · ... winter storm-related injuries result from slipping or falling on snow or ice. The economic cost of these injuries, the increased ...
-
[74]
US Energy Information Administration, Winter Fuels Outlook - EIAOct 15, 2025 · We expect U.S. households that primarily use electricity for heating will spend an average of 4% more on their electricity bills this winter, ...
-
[75]
Winter residential energy expenditures vary by heating fuel - EIAOct 15, 2025 · We expect energy expenditures this winter will vary based on a home's main space heating fuel: homes heating with natural gas will pay about ...
-
[76]
[PDF] NCHRP Project 20-07(300) | Winter Maintenance OperationsThe cost of road closure is far greater than the cost of winter highway maintenance activities. From one economic study, it was found that “failure to get ...
-
[77]
USDA Scientists Work to Ensure Nutritious and High-Quality ...Jan 10, 2024 · Storing and maintaining potatoes at their top nutritional quality while meeting consumer and market demands is essential for the industry. Yet, ...Missing: shifts FAO
-
[78]
[PDF] Economic impact of highway snow and ice control - ROSA POne area where such economic justification would be particularly helpful is in recommending budgets for snow and ice removal.
-
[79]
Overview of Ski History - Norwegian-American Historical AssociationModern skiing began in Norway/Sweden in the Viking age. It came to America in the 1840s-1850s, with early clubs forming in the 1880s. The Ishpeming Ski Club ...
-
[80]
The Origins of Skiing? | 8,000 Years Ago... - SnowBrainsApr 25, 2020 · The Sami people of Northern Scandinavia are credited with inventing skis, possibly due to their time on snow after the Ice Age. The oldest skis ...<|separator|>
-
[81]
The Origins and Evolution of Figures and Figure Skating - ORDASep 26, 2023 · It was more than 5,000 years ago that Scandinavians first took to the ice on crude blades they fashioned from the shin bones of large animals.
-
[82]
The History Of Ice Skates - Science FridayMar 14, 2018 · Developed in Scandinavia, the earliest skaters pierced a hole through the bone and fitted them with leather straps.
-
[83]
A Brief History of Snowboarding - Smithsonian MagazineThe first known instance came in 1917, when 13-year-old Vern Wicklund stood on a modified sled that he rode down his parents' backyard in Cloquet, Minnesota.
-
[84]
Chamonix 1924 Winter Olympics - Athletes, Medals & ResultsRelive the moments that went down in history at the 1924 winter Olympics in Chamonix. Access official videos, results, galleries, sport and athletes.Missing: inclusion | Show results with:inclusion
-
[85]
First Winter Olympics | January 25, 1924 - History.comOn January 25, 1924, the first Winter Olympics take off in style at Chamonix in the French Alps. Spectators were thrilled by the ski jump and bobsled as well ...Missing: inclusion | Show results with:inclusion
-
[86]
History of Christmas - Origins, Traditions & FactsPopular customs include exchanging gifts, decorating Christmas trees, attending church, sharing meals with family and friends and, of course, waiting for Santa ...
-
[87]
8 Hanukkah Traditions and Their Origins - History.comDec 21, 2022 · From lighting a menorah, to giving out gelt, to eating cheese—find out how these Hanukkah traditions began.
-
[88]
What Is Hanukkah? - Info you need about Chanukah - Chabad.orgHanukkah (Chanukah) is the Jewish eight-day, wintertime “festival of lights,” celebrated with a nightly menorah lighting, special prayers and fried foods.Missing: winter | Show results with:winter
-
[89]
What Is Yule? | Burning of the Yule Log | The Old Farmer's AlmanacBurning a log in celebration of Yule started well before medieval times. It began as part of the winter solstice festivities. The candles and lights associated ...
- [90]
-
[91]
Fishing | Milwaukee Public MuseumAmong the Ojibwe, women did most of the fishing, except for ice fishing in the winter and spear fishing in the spring.
-
[92]
Spearfishing through Ice: Modern Adherents to an Ancient TraditionMar 10, 2020 · Archaeological evidence suggests that indigenous tribes of North America began spearing fish through the ice more than 2,000 years ago—long ...
-
[93]
Everything you need to know about hotpot, Hong Kong's favourite ...Dec 31, 2022 · Everything you need to know about hotpot, Hong Kong's favourite winter comfort food – from the Chinese soup dish's origins to how to eat it.
-
[94]
The Complete Guide to Nabe (Hot Pot), a Staple Japanese Winter ...Jan 30, 2020 · Nabe, which literally means "hot pot" in Japanese, is a classic winter food in Japan. It's typically a stew where ingredients like meat, fish, and vegetables ...
-
[95]
This Day In History: Mount Tambora Explosively Erupts in 1815Apr 10, 2020 · The volcanic winter also caused crop failures , food shortages, and flooding for most of North America, Western Europe, and parts of Asia.
-
[96]
Blast from the Past - Smithsonian MagazineClimate experts believe that Tambora was partly responsible for the unseasonable chill that afflicted much of the Northern Hemisphere in 1816, known as the “ ...
-
[97]
[PDF] Climate: Observations, projections and impacts - Met OfficeIt is considerably warmer than the winter of 1978/79, the coldest in the. CRUTEM3 dataset. In the absence of human influences on the climate (green ...
-
[98]
The History of British Winters - Netweather.tvExplore the history of UK winters, from famous blizzards to record-breaking mild spells. Discover the stories behind the seasons.New Century, Similar Pattern · New Century! Some Big... · New Century, Some Very...Missing: credible sources
-
[99]
Recalling the 1976 drought: 40 years onJun 21, 2016 · From 22nd June to 16th July 1976, somewhere in the UK exceeded 25°C every day. Even more remarkable, for 15 consecutive days from 23rd June to ...
-
[100]
National Weather Service Heritage Explore NWS History - NOAA VLab“Great Blizzard” Paralyzes Northeast. One of the worst blizzards in the nation's history strikes the northeast U.S., producing up to 50 inches of snow and 3- ...
-
[101]
The Blizzards of 1888 - National Weather Service HeritageAug 30, 2019 · More than 400 people died from this storm, 200 in New York City alone. Additionally, the winds were so fierce that more than 200 vessels were ...Missing: effects | Show results with:effects
-
[102]
Great Blizzard of '88 hits East Coast | March 11, 1888 - History.comOn March 11, 1888, one of the worst blizzards in American history strikes the Northeast, killing more than 400 people and dumping as much as 55 inches of snow ...Missing: paralyzing source
-
[103]
Final Report on February 2021 Freeze Underscores Winterization ...Nov 16, 2021 · More than 4.5 million people in Texas lost power – some for as long as four days. Tragically, the loss of electricity caused the deaths of ...
-
[104]
The Great Texas Freeze: February 11-20, 2021 | NewsFeb 24, 2023 · On February 11-20, 2021, a historical winter event occurred that set many records, including being the first billion-dollar weather disaster of that year.
-
[105]
Temperature Anomaly corresponding to January 2014 Polar Vortex ...Jul 9, 2019 · During the month of January 2014, the continental United States experienced several bouts of extremely cold air that moved southward from the north polar ...
-
[106]
Understanding the Arctic polar vortex | NOAA Climate.govMar 5, 2021 · The Arctic polar vortex is a band of strong westerly winds in the stratosphere, 10-30 miles above the North Pole, enclosing cold air.Missing: dynamics | Show results with:dynamics
-
[107]
Skadi - Norse Mythology for Smart PeopleSkadi is a giantess and goddess in Norse mythology. Her name is either identical with the Old Norse common noun skaði, “harm,” or comes from another ...
-
[108]
Ragnarok - Norse Mythology for Smart PeopleRagnarok is the cataclysmic destruction of the cosmos, including the gods, and the end of everything, with the world sinking into the sea.
-
[109]
Marzanna, Slavic Goddess of Death and Winter - ThoughtCoOct 28, 2019 · The effigy represents Marzanna, and the burning or destruction of the effigy represents the banishing of winter from the land. The drowning ...<|separator|>
-
[110]
Into the white | Art | The GuardianDec 18, 2006 · Snow is no longer made homely by winter sports and braziers. It becomes the white shroud of death. Caspar David Friedrich's painting The ...
-
[111]
Coyote and Grisly Bear make the Seasons, and Night and DayCoyote saved the people from having to live in darkness and cold; and he determined the seasons and days as they are now.