Everything about Spring Season totally explained
Spring is one of the four
temperate seasons. Spring marks the transition from
winter into
summer.
Dates
According to the astronomical definition, spring begins on
March 21 and lasts until
June 20, the
vernal equinox in the
northern hemisphere. According to this definition, therefore, the traditional mid-summer's day is the first day of summer. The
meteorological definition (used in order to express whether 'spring' has been hot or cold or wet, for example) has spring starting on
March 1, since this more in line with weather conditions thought to be typical of spring. The
phenological definition of spring relates to the blossoming of a range of plant species. It therefore varies according to the climate (as in 'Spring comes late to the north-east'). Calendars typically give the first, but the second and third are more in line with common use.
According to
solar term, spring begins on
February 4 and lasts on
May 4.
In the
southern hemisphere, spring is generally accepted to begin on
September 1 and last until
November 30.
As in summer, the axis of the
Earth is tilted toward the
Sun and the length of daylight rapidly increases. The northern hemisphere begins to warm significantly causing new plant growth to "spring forth," giving the season its name.
Snow begins to melt and streams swell with runoff and spring rains. Most flowering plants bloom this time of year, in a long succession sometimes beginning even when snow is still on the ground, and continuing into early summer. In normally snowless areas "spring" may begin as early as February during warmer years, with
subtropical areas having very subtle differences, and
tropical ones none at all.
Subarctic areas may not experience "spring" at all until May or even June, or December in the outer
Antarctic.
Severe weather most often occurs during the spring, when warm air begins to invade from lower
latitudes while cold air is still pushing from the
polar regions. Flooding is also most common in and near mountainous areas during this time of year because of snowmelt, many times accelerated by warm rains. In the
United States,
Tornado Alley is most active by far this time of year, especially since the
Rocky Mountains prevent the surging hot and cold air masses from spreading eastward and instead force them directly at each other. Besides
tornadoes,
supercell thunderstorms can also produce dangerously large
hail and very high winds, for which a
severe thunderstorm warning or
tornado warning is usually issued. Even more so than winter, the
jet streams play an important role in severe weather in the springtime.
The
hurricane season officially begins in late spring, on
May 15 in the northeastern
Pacific and
June 1 in the northern
Atlantic. Before these dates, hurricanes are almost unheard of and even tropical storms are rare, one of the earliest ever being
Tropical Storm Ana in mid-April 2003.
Spring is seen as a time of growth, renewal, of new life (both plant and animal) being born. The term is also used more generally as a metaphor for the start of better times, as in
Prague Spring.
Nowruz
The first day of spring is the beginning of the new year,
Nowruz, in the
Iranian calendar. Nowruz (also Norooz, Newroz, Navroj, and many other variants) marks an important traditional holiday festival celebrated in Iran as well as in many other countries with a significant population from one of various Iranian peoples, such as
Azerbaijan,
Afghanistan and
Tajikistan, and by
Kurdish communities in Turkey and Iraq and elsewhere. Several
Turkic peoples also celebrate Nowruz.
Gallery
Image:Colorful spring garden.jpg|Colorful Spring garden flowers
Image:Tarrytown_Apple_Blossoms.jpg|Tarrytown, NY in spring
Image:Frühling blühender Kirschenbaum.jpg|A blooming Sour Cherry in spring
Image:Loewenzahnwiese tharandt mai 2006.jpg|Dandelions in spring
Image:SpringFlower_2008.jpg|Encelia farinosa in spring
Further Information
Get more info on 'Spring Season'.
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