(the ‘article circle’ border in ‘blue’)
(‘july 10° C mean isotherm’ in ‘red’)
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(from θέρμη or thermē, meaning ‘heat’)
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-as of [30 MARCH 2024]–
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-the arctic circle is the most ‘northerly’ of the abstract 5 major ‘circles of latitude’ as shown on maps of the ‘earth’-
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(it marks the northernmost point at which the ‘noon sun’ is just visible on the ‘northern winter solstice’ and the southernmost point at which the ‘midnight sun’ is just visible on the ‘northern summer solstice’)
(the region north of this circle is known as the ‘Arctic’, and the zone just to the south is called the ‘Northern Temperate Zone’)
(north of the ‘arctic circle’, the sun is above the horizon for 24 continuous hours at least once per year (and therefore visible at ‘midnight’) and below the ‘horizon’ for 24 continuous hours at least once per year (and therefore not visible at ‘noon’); this is also true within the equivalent ‘polar circle’ in the ‘southern hemisphere’, the ‘antarctic circle’)
(the position of the ‘arctic circle’ is not fixed; as of ’31 may 2017, it runs 66° 33′ 46.7″ north of the ‘equator’)
(its ‘latitude’ depends on the earth’s ‘axial tilt’, which fluctuates within a margin of 2° over a 40,000-year period, due to ‘tidal forces’ resulting from the orbit of the ‘moon’)
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(consequently, the ‘arctic circle’ is currently drifting northwards at a speed of about 15 meters (NOT ‘metres’ you ‘bloody limeys’!) (or “49 feet”) per ‘year’)
*an iso-therm is a line that connects points on a map that have the same ‘temperature’*
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therefore, all points through which an isotherm passes have the same or equal temperatures at the time indicated.
An isotherm at 0 °C is called the freezing level.
The term was coined by the Prussian geographer and naturalist Alexander von Humboldt, who as part of his research into the geographical distribution of plants published the first map of isotherms in Paris, in 1817.
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*👨🔬🕵️♀️🙇♀️*SKETCHES*🙇♂️👩🔬🕵️♂️*
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💕💝💖💓🖤💙🖤💙🖤💙🖤❤️💚💛🧡❣️💞💔💘❣️🧡💛💚❤️🖤💜🖤💙🖤💙🖤💗💖💝💘
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*🌈✨ *TABLE OF CONTENTS* ✨🌷*
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🔥🔥🔥🔥🔥🔥*we won the war* 🔥🔥🔥🔥🔥🔥