Why is there an ozone hole at Antarctica and not at the Arctic Circle or the equator?
Despite not having any significant source , the abundance of CFC in Antarctica is quite high.That’s because of Atmospheric mixing. CFC’s are very stable molecules- so stable that they survive to reach the highest levels of the atmosphere, and remotest corner of the globe- the Antarctica. It’s not that only Antarctica have abundance of CFC’s.Then why Ozone hole appear over Antarctic only?It’s because of this-Fig: The Polar Stratospheric clouds (PSC) over Antarctica.and this-Fig: Polar vortex.Causes of Ozone Depletion over AntarcticaThe ozone hole is most significant over Antarctica because it has just the right atmospheric and chemical conditions required to destroy ozone by reactive halogen gases (such as CFC’s)The formation of Polar Vortex- strong circular winds that blows around the continent- provide isolation. Isolation prevents substantial motion of air into or out of the polar stratosphere.The formation of PSC require very low temperature, sunlight and . Antarctic has it all. Though both Polar regions have extremely low temperatures,during the Antarctic winter, minimum daily temperatures are generally much lower and less variable than in the Arctic winter. Antarctic temperatures also remain below the PSC formation temperature for much longer periods during winter. Reactions on the surfaces of these PSCs release reactive chlorine gas, chlorine monoxide (ClO). Chlorine destroys Ozone.The ozone hole is present over the Antarctica because of the unique atmospheric conditions, and constant feeding of CFC’s from the lower latitudes- thanks to long shelf life and redistribution by convection forces.
Is the Arctic Circle closer to the equator or the South Pole?
No the arctic circle is near the North Pole so It's closer to the equator rather than the South Pole
What are the major cities in the Arctic?
By arctic, I assume you mean above the arctic circle. The largest cities are Tromso, Norway; Murmansk, Russia and Barrow, Alaska.
Does the North Pole have a zip code? If not, what country's zip code is the highest north...?
There isn't any sort of permanent settlement at the North Pole. There's no dirt there; it's just frozen sea. It's not safe to build any sort of permanent structure there, not even a research station, so there's no post office. The northernmost postal code (and northernmost just-about-everything) is in Norway, specifically Ny-Ålesund, postal code N-9173 (78° 55′ N). They don't have an actual post office, though, just a code. The northernmost American zip code is 99723, Barrow, Alaska, at 71°18'. If Santa has a zip code, he's not telling anybody. But if you address a letter to "Santa, the North Pole", the post office will get it to a kind of virtual Santa (who happens to be in New York).