The city is in total darkness between mid-November and January.Primarily known of as an adventurer who takes many risks to inject his television shows with a sense of adrenaline and excitement, the British writer Bear Grylls is also equally known for his many books as well, as he documents his exploits for his legions of fans, with a strong personality that’s gaining more and more fans worldwide day-by-day. In Barrow, Alaska, the northernmost city in the U.S., it stays light all day long between mid-May and early August. Near the poles, the amount of daylight changes dramatically between summer and winter. Polar regions experience seasonal variation, although they are generally colder than other places on Earth. Near the Equator, regions typically have alternating rainy and dry seasons. They have about the same amount of daylight and darkness throughout the year. Places near the Equator experience little seasonal variation. It has 14.5 hours of daylight in June and 9.5 hours in December. Athens, Greece, in southern Europe, has a smaller variation. In mid-December, however, it is light for less than 6 hours. Helsinki, Finland, sees 18.5 hours of daylight in the middle of June. The farther north you go, the bigger the differences in the seasons. The mid-latitudes are places that are neither near the poles nor near the Equator. The four-season year is typical only in the mid-latitudes.
In autumn, temperatures drop, and many trees lose their leaves. Summer is the warmest time of the year and has the most daylight, so plants grow quickly. In spring, plants sprout, tree leaves unfurl, and flowers blossom. Winter typically has cold weather, little daylight, and limited plant growth. Seasons have an enormous influence on vegetation and plant growth. In December, when the Northern Hemisphere is tilted away from the sun, with fewer hours of daylight. This means it gets more hours of daylight. In June, when the Northern Hemisphere is tilted toward the sun, the sun’s rays hit it for a greater part of the day than in winter.
Earth’s axis is an invisible line that runs through its center, from pole to pole. Seasons occur because Earth is tilted on its axis relative to the orbital plane, the invisible, flat disc where most objects in the solar system orbit the sun. The winter solstice in the Southern Hemisphere is June 20 or 21, while the summer solstice, the longest day of the year, is December 21 or 22.
This means that in Argentina and Australia, winter begins in June. The seasons in the Northern Hemisphere are the opposite of those in the Southern Hemisphere. The vernal, or spring, equinox falls on March 20 or 21, and the autumnal equinox is on September 22 or 23. Spring and fall, or autumn, begin on equinoxes, days that have equal amounts of daylight and darkness. Summer begins on June 20 or 21, the summer solstice, which has the most daylight of any day in the year. This is the winter solstice, the day of the year with the shortest period of daylight.
In the Northern Hemisphere, winter generally begins on December 21 or 22. Each has its own light, temperature, and weather patterns that repeat yearly. The four seasons-spring, summer, fall, and winter-follow one another regularly. A season is a period of the year that is distinguished by special climate conditions.
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