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Autumn, also known as fall, [1] 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
- Autumn Begins
- Trees Prepare For Winter
- The Chemistry of Colour
- People Born in Autumn Live Longer
- The Days Get Shorter
- A Date For Your Diary - 24 September 2303
- Persephone's Return
- Autumn and Fall
There are two different dates when autumn could be said to begin. Autumn, as defined by the Earth's orbit around the Sun, begins on the equinoxwhich falls on 22 or 23 September. However, to record climate data, it is important to have set dates that can be compared, so meteorological autumn always begins on 1 September.
One of the most stunning signs of autumn is the turning of the leaves. The shorter days are a sign to trees to begin to prepare for winter. During winter there is not enough light for photosynthesis to occur, so as the days shorten throughout autumn, the trees begin to close down their food production systems and reduce the amount of chlorophyll in...
Chlorophyll is the chemical which makes tree leaves green and as it declines other chemicals become more prominent in the leaves. These are responsible for the vibrant ambers, reds and yellows of autumn. The chemicals responsible are types of flavonoids, carotenoids and anthocyanins. Did you know some of these chemicals are the same ones that give ...
A study in the Journal of Aging Researchfound that babies born during the autumn months are more likely to live to 100 than those born during the rest of the year. Their study found that 30 % of US centenarians born during 1880-1895 were born in the autumn months.
The word equinox comes from the Latin equi (meaning equal) and nox(meaning night) accounting for the equinox marking the time when day and night are of equal length. We often notice the nights begin to draw in from this point as after the autumn equinox, the nights are longer than the days, until this is reversed at the spring equinox.
Generally speaking, the autumn equinox always falls on either 22 or 23 September, but not quite always. Because the Gregorian calendar is not quite in perfect symmetry with the Earth's orbit, the autumn equinox will very occasionally fall on September 24. This last happened in 1931 and will next happen in 2303.
In Greek mythology, autumn began when Persephone was abducted by Hades to be the Queen of the Underworld. In distress Persephone's mother, Demeter (the goddess of the harvest), caused all the crops on Earth to die until her daughter was allowed to return, marking spring.
We typically think of 'fall' as the North American version of the word 'autumn', but it was in fact in widespread usage in England until relatively recently. Originally a shortening of the phrase fall of the leaf, the phrase was common in England in the 17th century. The word autumn entered English from the French automne and didn't become common u...
Autumn brings a riot of colours and changes as both animals and humans harvest food for the winter months. Deciduous trees are losing their leaves and there are mass migrations of birds as summer...
Sep 30, 2024 · Autumn, or fall, season of the year between summer and winter during which temperatures gradually decrease. The autumn temperature transition between summer heat and winter cold occurs only in middle and high latitudes; in equatorial regions, temperatures generally vary little during the year.
- The Editors of Encyclopaedia Britannica
Sep 23, 2023 · This year autumn begins on 23 September 2023 and ends on 22 December 2023. The astronomical calendar determines the seasons due to the 23.5 degrees of tilt of the Earth's rotational axis in...
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The season of Autumn, during the months of September, October and November, is perfect for this.
Sep 6, 2024 · When does autumn begin this year? What is the equinox? And when do the clocks go back? Simon King has the answers.
