|
Fall Factor Diagram
Autumn, also known as fall (especially in US & Canada), is one of the four temperate seasons on Earth. Outside the tropics, autumn marks the transition from summer to winter, in September (Northern Hemisphere) or March ( Southern Hemisphere). Autumn is the season when the duration of daylight becomes noticeably shorter and the temperature cools considerably. Day length decreases and night length increases as the season progresses until the winter solstice in December (Northern Hemisphere) and June (Southern Hemisphere). One of its main features in temperate climates is the striking change in colour of the leaves of deciduous trees as they prepare to shed. Date definitions Some cultures regard the autumnal equinox as "mid-autumn", while others with a longer temperature lag treat the equinox as the start of autumn. In the English-speaking world of high latitude countries, autumn traditionally began with Lammas Day and ended around Hallowe'en, the approximate mid-points b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Temperate
In geography, the temperate climates of Earth occur in the middle latitudes (approximately 23.5° to 66.5° N/S of the Equator), which span between the tropics and the polar regions of Earth. These zones generally have wider temperature ranges throughout the year and more distinct seasonal changes compared to tropical climates, where such variations are often small; they usually differ only in the amount of precipitation. In temperate climates, not only do latitude, latitudinal positions influence temperature changes, but various sea currents, prevailing wind direction, continentality (how large a landmass is) and altitude also shape temperate climates. The Köppen climate classification defines a climate as "temperate" C, when the mean temperature is above but below in the coldest month to account for the persistence of frost. However, some adaptations of Köppen set the minimum at . Continental climate, Continental climates are classified as D and considered to be varie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Midwinter
Midwinter is the middle of the winter. The term is attested in the early Germanic calendars where it was a period or a day which may have been determined by a lunisolar calendar before it was adapted into the Gregorian calendar. It appears with several meanings in later sources, including the Christmas and holiday season, Christmas season, the first day of Þorri and the period from the middle of January to the middle of February. Since the 18th century, it has sometimes been misunderstood as synonymous with the astronomical winter solstice, which the word also can refer to in contemporary English. Attestations Midwinter is attested in the early Germanic calendars, where it appears to have been a specific day or a number of days during the winter half of the year. Before Christianisation and the adoption of the Julian calendar, the date of midwinter may have varied due to the use of a lunisolar calendar, or it may have been based on a week system tied to the astronomical winter so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gaelic Ireland
Gaelic Ireland () was the Gaelic political and social order, and associated culture, that existed in Ireland from the late Prehistory of Ireland, prehistoric era until the 17th century. It comprised the whole island before Anglo-Norman invasion of Ireland, Anglo-Normans conquered parts of Ireland in the 1170s. Thereafter, it comprised that part of the country not under foreign dominion at a given time (i.e. the part beyond The Pale). For most of its history, Gaelic Ireland was a "patchwork" hierarchy of territories ruled by a hierarchy of kings or chiefs, who were chosen or elected through tanistry. Gaelic warfare, Warfare between List of Irish kingdoms, these territories was common. Traditionally, a powerful ruler was acknowledged as High King of Ireland. Society was made up of Irish clans, clans and, like the rest of History of Europe, Europe, was structured hierarchically according to Social class, class. Throughout this period, the economy was mainly Pastoralism, pastoral a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
November
November is the eleventh and penultimate month of the year in the Julian and Gregorian calendars. Its length is 30 days. November was the ninth month of the calendar of Romulus . November retained its name (from the Latin ''novem'' meaning "nine") when January and February were added to the Roman calendar. November is a month of late spring in the Southern Hemisphere and late autumn in the Northern Hemisphere. Therefore, November in the Southern Hemisphere is the seasonal equivalent of May in the Northern Hemisphere and vice versa. In Ancient Rome, Ludi Plebeii was held from November 4–17, Epulum Jovis was held on November 13 and Brumalia celebrations began on November 24. These dates do not correspond to the modern Gregorian calendar. November was referred to as Blōtmōnaþ by the Anglo-Saxons. Brumaire and Frimaire were the months on which November fell in the French Republican calendar. Astronomy November meteor showers include the Andromedids, which occurs fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
October
October is the tenth month of the year in the Julian and Gregorian calendars. Its length is 31 days. The eighth month in the old calendar of Romulus , October retained its name (from Latin and Greek ''ôctō'' meaning "eight") after January and February were inserted into the calendar that had originally been created by the Romans. In Ancient Rome, one of three Mundus patet would take place on October 5, Meditrinalia October 11, Augustalia on October 12, October Horse on October 15, and Armilustrium on October 19. These dates do not correspond to the modern Gregorian calendar. Among the Anglo-Saxons, it was known as Winterfylleth (Ƿinterfylleþ), because at this full moon, winter was supposed to begin. October is commonly associated with the season of autumn in parts of the Northern Hemisphere, and spring in parts of the Southern Hemisphere, where it is the seasonal equivalent to April in the Northern Hemisphere and vice versa. Symbols October's birthstones ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
September
September is the ninth month of the year in the Julian and Gregorian calendars. Its length is 30 days. September in the Northern Hemisphere and March in the Southern Hemisphere are seasonally equivalent. In the Northern hemisphere, the beginning of the meteorological autumn is on 1 September. In the Southern hemisphere, the beginning of the meteorological spring is on 1 September. September marks the beginning of the ecclesiastical year in the Eastern Orthodox Church. It is the start of the academic year in many countries of the northern hemisphere, in which children go back to school after the summer break, sometimes on the first day of the month. Some Libras and Virgos are born in September, with Virgos being born on September 1st through September 22nd and Libras September 23rd through September 30. September (from Latin ''septem'', "seven") was originally the seventh month in the oldest known Roman calendar, the calendar of Romulus , with March being ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Met Éireann
Met Éireann (; meaning "Meteorology, Met of Ireland") is the state meteorology, meteorological service of Republic of Ireland, Ireland, part of the Department of Housing, Local Government and Heritage. History The history of modern meteorology in Ireland dates back to 8 October 1860, when the first weather observations were transmitted from Valentia Observatory on Valentia Island in County Kerry to the British Meteorological Office. A network of weather stations was established around the coasts of the United Kingdom of Great Britain and Ireland. The service expanded rapidly in the post-war years, with its headquarters relocating to O'Connell Street, opposite Gresham Hotel, The Gresham Hotel in Dublin. The service began supplying forecasts to Raidió Teilifís Éireann, Radio Éireann from 1948, to List of Irish newspapers, daily newspapers from 1952, to television from shortly after the first Raidió Teilifís Éireann (RTÉ) television broadcasts in 1962, and recorded teleph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar Term
A solar term (or ''jiéqì'', zh, t=節氣, s=节气) is any of twenty-four periods in traditional Chinese lunisolar calendars that matches a particular astronomical event or signifies some natural phenomenon. The points are spaced 15° apart along the ecliptic and are used by lunisolar calendars to stay synchronized with the seasons, which is crucial for agrarian societies. The solar terms are also used to calculate intercalary months; which month is repeated depends on the position of the sun at the time. According to the '' Book of Documents'', the first determined term was Dongzhi (Winter Solstice) by Dan, the Duke of Zhou, while he was trying to locate the geological center of the Western Zhou dynasty, by measuring the length of the sun's shadow on an ancient type of sundial called (). Then four terms of seasons were set, which were soon evolved as eight terms; not until the Taichu Calendar of 104 BC were all twenty-four solar terms officially included in the Chinese ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mehregan
Mehregan () or Jashn-e Mehr ( ''Mithra Festival'') is a Zoroastrianism, Zoroastrian and Iranian peoples, Iranian festival celebrated to honor the yazata Mithra (), which is responsible for friendship, affection and love. Name "Mehregan" is derived from the Middle Persian name ''Mihrakān/Mihragān'', itself derived from Old Persian ''Mithrakāna''. Introduction Mehregan is an Iranian festival honoring the Zoroastrian yazata Mithra. Under the Achaemenid Empire (330–550 BC), the Armenians, Armenian subjects of the Persian king gave him 20,000 horses every year during the celebration of Mehregan. Under the Sasanian Empire (224–651), Mehregan was the second most important festival, falling behind Nowruz. Due to these two festivals being heavily connected with the role of Iranian kingship, the Sasanian rulers were usually crowned on either Mehregan or Nowruz. In al-Biruni's eleventh-century ''Book of Instructions in the Elements of the Art of Astrology'' (233), the astronome ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Autumn Leaf Color
Autumn leaf color is a phenomenon that affects the normally green leaves of many deciduous trees and shrubs by which they take on, during a few weeks in the autumn season, various shades of yellow, orange, red, purple, and brown. The phenomenon is commonly called autumn colours or autumn foliage in British English and fall colors, fall foliage, or simply foliage in American English. In some areas of Canada and the United States, "leaf peeping" tourism is a major contribution to economic activity. This tourist activity occurs between the beginning of color changes and the onset of Deciduous#Botany, leaf fall, usually around September to November in the Northern Hemisphere and March to May in the Southern Hemisphere. Chlorophyll and the green/yellow/orange colors A green leaf is green because of the presence of a pigment known as chlorophyll, which is inside an organelle called a chloroplast. When abundant in the leaf's cell (biology), cells, as during the growing season, the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
September Equinox
The September equinox (or southward equinox) is the moment when the Sun appears to cross the celestial equator, heading southward. Because of differences between the calendar year and the tropical year, the September equinox may occur from September 21 to 24. At the equinox, the Sun as viewed from the equator rises due east and sets due west. Before the Southward equinox, the Sun rises and sets more northerly, and afterwards, it rises and sets more southerly. The equinox may be taken to mark the end of astronomical summer and the beginning of astronomical autumn (autumnal equinox) in the Northern Hemisphere, while marking the end of astronomical winter and the start of astronomical spring (vernal equinox) in the Southern Hemisphere. Occurrences The September equinox is one point in time commonly used to determine the length of the tropical year. The dates and times of the September equinoxes that occur from the year 2018 to 2028 (UTC) are listed as follows: Const ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
