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What countries sign off on the antarctic treaty?

Antarctica

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Sarah last edited by

What countries sign off on the antarctic treaty?
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happytiger122 Discussion Fanatics last edited by

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Chlorofluorocarbon gases (CFCs) take six or seven years to move up to the stratosphere and the winds spread them all round the world.Extreme cold, a freezing vortex wind, frozen stratospheric clouds and 6-month darkness over Antarctica all provide ideal conditions for chlorine to break from the CFCs.The chlorine (and bromine) gases destroy the ozone during spring (Sept to Dec) and this is what causes the ozone hole.More detail:Chlorofluorocarbon gases (CFCs) and related halocarbon gases are the main cause of ozone depletion all over the world. CFCs released from Western countries take several years to reach the stratosphere where the ozone layer is. During that time winds spread them all over the world. In the presence of ultraviolet light these gases release chlorine and bromine atoms which destroy some of the ozone in the ozone layer. This is called ozone depletion. The ozone hole is a related but different phenomenon. The hole is Antarctica occurs in the spring (September to December). It begins with this overall ozone thinning, but it is assisted by the presence of polar stratospheric clouds (PS clouds). During the extreme cold of winter, with no sun for six months, polar winds create a vortex which traps and chills the air; the temperature is below -80 Celsius. The ice in these PS clouds provides surfaces for the chemical reactions that destroy the ozone. This needs light to kick-start the reactions.In spring the sun rises above the horizon and provides energy which starts the photochemical reactions. The clouds melt and the trapped compounds (chlorine and chlorine monoxide from the CFCs) are released. Ozone in the lower stratosphere is destroyed and the ozone hole appears.By the end of spring warmer December temperatures break up the vortex and destroy the PS clouds. Sunlight starts creating ozone again and the hole begins to repair.(A similar hole in the Arctic [but smaller because of warmer temperatures] occurs during spring.)
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No. Antarctica is one place - a continent. No people live in Antarctica, so it cannot be developing.
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NigerSudanCameroonCentral African RepublicNigeriaLibya

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How many countries share a border with Burma?
Myanmar • countries share burma countries share border • • yellowcat832

What countries does Brazil buy Barite from?
Brazil • brazil buy buy barite brazil barite countries • • redbutterfly148

What countries can you travel with Comoros passport?
Comoros • comoros passport comoros passport countries travel • • purplegoose777

What are the neighboring countries to Cuba?
Cuba • neighboring countrie cuba neighboring countries • • ticklishgoose482

Why is an ozone hole formed only above Antarctica and not over developed countries that emit a lot of CFCs?
Antarctica • ozone hole hole formed developed countries antarctica cfcs • • smalllion207

What countries have visa free or visa on arrival?
Benin • visa free visa arrival countries free • • happysnake631

Are there any developing countries in Antarctica?
Antarctica • antarctica united kingdom developing countries countries continent • • smallpeacock212

What countries border Chad?
Chad • border chad countries border chad countries border • • bluekoala297