صيف

(تم التحويل من الصيف)
يجب ألا يـُخلـَط بينها وبين Sumer.
"Summers" redirects here. For other uses, see Summer (disambiguation) and Summers (disambiguation).
Summer
Temperate season
Field Hamois Belgium Luc Viatour.jpg
Summer in Belgium
Northern temperate zone
Astronomical season21 June – 23 September
Meteorological season1 June – 31 August
Solar (Celtic) season1 May – 31 July
Southern temperate zone
Astronomical season22 December – 21 March
Meteorological season1 December – 28/29 February
Solar (Celtic) season1 November – 31 January
الصيف
الربيع Seasons.svg الخريف
الشتاء
جزء من سلسلة الطبيعة عن
الطقس
Global tropical cyclone tracks-edit2.jpg
الفصول
المواسم المدارية
العواصف
التساقط
موضوعات
المعاجم
Cumulus clouds in fair weather.jpeg Weather portal

Summer is the hottest and brightest of the four temperate seasons, occurring after spring and before autumn. At or centred on the summer solstice, daylight hours are longest and darkness hours are shortest, with day length decreasing as the season progresses after the solstice. The earliest sunrises and latest sunsets also occur near the date of the solstice. The date of the beginning of summer varies according to climate, tradition, and culture. When it is summer in the Northern Hemisphere, it is winter in the Southern Hemisphere, and vice versa.

صيف فصل من فصول السنة الأربعة وهو أشد الفصول حرارة, يبدأ في شهر يونيو وينتهي في سبتمبر في البلاد الواقعة شمال خط الأستواء, ويبدأ في ديسمبر وينتهي في مارس في البلاد الواقعة جنوب خط الأستواء.

يذهب الناس للشواطئ في الصيف

وفي فصل الصيف تكون أجازة المدارس والجامعات في أغلب دول العالم, ويذهب الناس في الصيف إلى الشواظئ والمدن الساحلية هروبا من شدة الحر.

كومونز
هنالك المزيد من الملفات في ويكيميديا كومنز حول :

ويوجد كثير من الشعراء تحدثوا عن الصيف في شعرهم ومن أشهرهم إيليا أبو ماضي في قصيدة الصيف حيث يقول :

عاد للأرض مع الصيف صباها فهي كالخود التي تمّت حلاها
صور من خضرة في نضره ما رآها أحد إلاّ اشتهاها
ذهب الشمس على آفاقها و سواد اللّيل مسك في ثراها
و نسيم في أشجارها و شوشات يطرب النهر صداها

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Timing

للمزيد من المعلومات: Meteorological seasons

From an astronomical view, the equinoxes and solstices would be the middle of the respective seasons,[1][2] but sometimes astronomical summer is defined as starting at the solstice, the time of maximal insolation, often identified with 21 June or 21 December. By solar reckoning, summer instead starts on May Day and the summer solstice is Midsummer. A variable seasonal lag means that the meteorological centre of the season, which is based on average temperature patterns, occurs several weeks after the time of maximal insolation.[3]

The meteorological convention is to define summer as comprising the months of June, July, and August in the northern hemisphere and the months of December, January, and February in the southern hemisphere.[4][5] Under meteorological definitions, all seasons are arbitrarily set to start at the beginning of a calendar month and end at the end of a month.[4] This meteorological definition of summer also aligns with the commonly viewed notion of summer as the season with the longest (and warmest) days of the year, in which daylight predominates.

The meteorological reckoning of seasons is used in countries including Australia, New Zealand, Austria, Denmark, Russia and Japan. It is also used by many people in the United Kingdom and Canada. In Ireland, the summer months according to the national meteorological service, Met Éireann, are June, July and August. By the Irish calendar, summer begins on 1 May (Beltane) and ends on 31 July (Lughnasadh).[بحاجة لمصدر]

In the middle of summer, the sun can appear even at midnight in the northern hemisphere. Photo of midnight sun in Inari, Finland.

Days continue to lengthen from equinox to solstice and summer days progressively shorten after the solstice, so meteorological summer encompasses the build-up to the longest day and a diminishing thereafter, with summer having many more hours of daylight than spring. Reckoning by hours of daylight alone, summer solstice marks the midpoint, not the beginning, of the seasons. Midsummer takes place over the shortest night of the year, which is the summer solstice, or on a nearby date that varies with tradition.

Where a seasonal lag of half a season or more is common, reckoning based on astronomical markers is shifted half a season.[6] By this method, in North America, summer is the period from the summer solstice (usually 20 or 21 June in the Northern Hemisphere) to the autumn equinox.[7][8][9]

Reckoning by cultural festivals, the summer season in the United States is traditionally regarded as beginning on Memorial Day weekend (the last weekend in May) and ending on Labor Day (the first Monday in September), more closely in line with the meteorological definition for the parts of the country that have four-season weather. The similar Canadian tradition starts summer on Victoria Day one week prior (although summer conditions vary widely across Canada's expansive territory) and ends, as in the United States, on Labour Day.

In some Southern Hemisphere countries such as Brazil, Argentina, South Africa, Australia and New Zealand, summer is associated with the Christmas and New Year holidays. Many families take extended holidays for two or three weeks or longer during summer.

In Australia and New Zealand, summer begins on 1 December and ends on 28 February (29 February in leap years).

In Chinese astronomy, summer starts on or around 5 May, with the jiéqì (solar term) known as lìxià (立夏), i.e. "establishment of summer".[10][11] Summer ends around 7 August, with the solar term of lìqiū (立秋, "establishment of autumn").

In southern and southeast Asia, where the monsoon occurs, summer is more generally defined as lasting from March, April, May and June, the warmest time of the year, ending with the onset of the monsoon rains.[بحاجة لمصدر]

Because the temperature lag is shorter in the oceanic temperate southern hemisphere,[12] most countries in this region use the meteorological definition with summer starting on 1 December and ending on the last day of February.[13][14]


Weather

انظر أيضاً: Hail, Tropical cyclone, and Wet season
Wet season thunderstorm at night in Darwin, Northern Territory, Australia.

Summer is traditionally associated with hot or warm weather. In Mediterranean climates, it is also associated with dry weather, while in other places (particularly in Eastern Asia because of the monsoon) it is associated with rainy weather. The wet season is the main period of vegetation growth within the savanna climate regime.[15] Where the wet season is associated with a seasonal shift in the prevailing winds, it is known as a monsoon.[16]

Image of Hurricane Ida from late August 2021.

In the northern Atlantic Ocean, a distinct tropical cyclone season occurs from 1 June to 30 November.[17] The statistical peak of the Atlantic hurricane season is 10 September. The Northeast Pacific Ocean has a broader period of activity, but in a similar timeframe to the Atlantic.[18] The Northwest Pacific sees tropical cyclones year-round, with a minimum in February and March and a peak in early September. In the North Indian basin, storms are most common from April to December, with peaks in May and November.[17] In the Southern Hemisphere, the tropical cyclone season runs from the start of November until the end of April with peaks in mid-February to early March.[17][19]

Thunderstorm season in the United States and Canada runs in the spring through summer but sometimes can run as late as October or even November in the fall. These storms can produce hail, strong winds and tornadoes, usually during the afternoon and evening.

Holidays

School breaks

Schools and universities typically have a summer break to take advantage of the warmer weather and longer days. In almost all countries, children are out of school during this time of year for summer break, although dates vary. Many families will take holidays for a week or two over summer, particularly in Southern Hemisphere Western countries with statutory Christmas and New Year holidays.

In the United States, public schools usually end in late May in Memorial Day weekend, while colleges finish in early May. Public school traditionally resumes near Labor Day, while higher institutions often resume in mid-August.

In England and Wales, school ends in mid-July and resumes again in early September. In Scotland, the summer holiday begins in late June and ends in mid-to late-August. Similarly, in Canada the summer holiday starts on the last or second-last Friday in June and ends in late August or on the first Tuesday of September, with the exception of when that date falls before Labour Day, in which case, ends on the second Tuesday of the month. In Russia the summer holiday begins at the end of May and ends on 31 August.

In the Southern Hemisphere, school summer holiday dates include the major holidays of Christmas and New Year's Day. School summer holidays in Australia, New Zealand and South Africa begin in early December and end in early February, with dates varying between states. In South Africa, the new school year usually starts during the second week of January, thus aligning the academic year with the Calendar year. In India, school ends in late April and resumes in early or mid-June. In Cameroon and Nigeria, schools usually finish for summer vacation in mid-July and resume in the later weeks of September or the first week of October.

Public holidays

A wide range of public holidays fall during summer, including:

Activities

Summer is usually the season of travel, swimming, summer vacation for many people, and also the season for fruits and plants to fully develop.
Hotels and tourists along the Atlantic Ocean shoreline in Myrtle Beach, South Carolina in summer

People generally take advantage of the high temperatures by spending more time outdoors during summer. Activities such as travelling to the beach and picnics occur during the summer months. Sports including cricket, association football (soccer), horse racing, basketball, American football, volleyball, skateboarding, baseball, softball, tennis and golf are played.

Water sports also occur. These include water skiing, wakeboarding, swimming, surfing, tubing and water polo. The modern Olympics have been held during the summer months every four years since 1896. The 2000 Summer Olympics, in Sydney, were held in spring and the 2016 Summer Olympics, in Rio de Janeiro, were held in winter.

In the United States, many television shows made for children are released during the summer, as children are off school.

Conversely, the music and film industries generally experience higher returns during the summer than other times of the year and market their summer hits accordingly. Summer is popular for animated movies to be released theatrically in movie theaters.[بحاجة لمصدر]

With many schools closed, especially in Western countries, travel and vacationing tend to peak during the summer. Teenagers and university students often take summer jobs, and business activity for the recreation, tourism, restaurant, and retail industries reach their peak.

See also

References

  1. ^ Ball, Sir Robert S (1900). Elements of Astronomy. London: The MacMillan Company. p. 52. ISBN 978-1-4400-5323-8.
  2. ^ Heck, Andre (2006). Organizations and strategies in Astronomy. Vol. 7. Springer. p. 14. ISBN 978-1-4020-5300-9.
  3. ^ Cecil Adams (11 مارس 1983). "Is it true summer in Ireland starts May 1?". The Straight Dope. Archived from the original on 30 أغسطس 2011. Retrieved 27 سبتمبر 2011.
  4. ^ أ ب Meteorological Glossary. London: HMSO. 1991. p. 260. ISBN 978-0-11-400363-0.
  5. ^ "Professor Paul Hardaker answers questions on meteorological forecasting". Royal Geographical Society. Archived from the original on 2 فبراير 2017.
  6. ^ Driscol, D. M.; Rice, P. B.; Fong, J. M. Y. (1994). "Spatial variation of climatic aspects of temperature: Interdiurnal variability and lag". International Journal of Climatology. 14 (9): 1001. Bibcode:1994IJCli..14.1001D. doi:10.1002/joc.3370140905.
  7. ^ "First day of summer worth celebrating". JSOnline. Archived from the original on 13 يوليو 2011. Retrieved 27 سبتمبر 2011.
  8. ^ "Father's Day is first day of summer". Fox11online.com. 19 يونيو 2009. Archived from the original on 17 سبتمبر 2011. Retrieved 27 سبتمبر 2011.
  9. ^ "Summer Solstice". Eric Weisstein's World of Astronomy. Scienceworld.wolfram.com. Retrieved 27 سبتمبر 2011.
  10. ^ Stepanchuk, Carol (1991). Mooncakes and Hungry Ghosts: Festivals of China. San Francisco: China Books & Periodicals. ISBN 0-8351-2481-9.
  11. ^ 菇溪風情 (in الصينية). 寧波出版社. 1 يناير 2019. pp. 9, 21. ISBN 978-7-5526-3347-4. Archived from the original on 5 أبريل 2023. Retrieved 31 مارس 2023.
  12. ^ Gabler, Robert E.; Petersen, James F.; Trapasso, L. Michael; Sack, Dorothy (2008). Physical Geography. Belmont, California: Cengage Learning. p. 107. ISBN 0495555061.
  13. ^ Williams, Jack (22 فبراير 2005). "Answers: When do the seasons begin". Usatoday.Com. Archived from the original on 27 يناير 2012. Retrieved 27 سبتمبر 2011.
  14. ^ "Bureau of Meteorology". Bom.gov.au. 11 مارس 2011. Archived from the original on 12 سبتمبر 2017. Retrieved 27 سبتمبر 2011.
  15. ^ "Characteristics of tropical savannas". Charles Darwin University. 2009. Archived from the original on 17 فبراير 2009. Retrieved 27 ديسمبر 2008.
  16. ^ "Monsoon". Glossary of Meteorology. American Meteorological Society. 2009. Archived from the original on 22 مارس 2008. Retrieved 16 يناير 2009.
  17. ^ أ ب ت Atlantic Oceanographic and Meteorological Laboratory, Hurricane Research Division. "Frequently Asked Questions: When is hurricane season?". National Oceanic and Atmospheric Administration. Archived from the original on 18 يوليو 2006. Retrieved 25 يوليو 2014.
  18. ^ McAdie, Colin (10 مايو 2007). "Tropical Cyclone Climatology". National Hurricane Center. Archived from the original on 6 مايو 2010. Retrieved 9 يونيو 2007.
  19. ^ "Tropical Cyclone Operational Plan for the Southeastern Indian Ocean and the South Pacific Oceans" (PDF). World Meteorological Organization. 10 مارس 2009. Archived from the original (PDF) on 25 مارس 2009. Retrieved 6 مايو 2009.


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External links

مشاع المعرفة فيه ميديا متعلقة بموضوع صيف.


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