before_revision: Tropical arctic The tropical arctic zone covers the overlapping regions of the tropical and arctic zones. This unique climatic zone is only possible on objects that have an obliquity range between 45 and 135. Since the obliquity of Pluto varies between a minimum of 103 and a maximum of 127, it therefore has a tropical arctic climate zone. This high obliquity implies that most of Pluto's surface experiences both tropical and arctic climates over the 2.8 million year obliquity cycle. The tropical arctic zone includes the region that overlaps between tropical and arctic zones extending between 13N to 77N and 13S to 77S. At this latitudinal range the zones cover 75\% of the total surface area. However, like the oscillation of tropical (between 53 and 77 latitude) and arctic (between 13 and 37 latitude) zones, the tropical arctic zone also expands and contrasts over the course of the obliquity cycle. Only the latitude range between 37 to 57 in each hemisphere remains stable over the period, and therefore, those bands are called the permanent tropical arctic zones on Pluto (which covers 20\% of the total area). Polar Pluto's polar zone comprises those areas where the Sun never reaches the zenith at any time of the orbital period of the dwarf planet over its entire obliquity cycle. This region always experiences arctic climate, never tropical climate, and it consistently experiences the longest duration of arctic winter and summer during each and every orbital rotation of Pluto. The polar zone has a radius of 13 from each pole. The zone spans from 77N to 90N and from 77S to 90S, encompassing an area total of 3\% of the dwarf planet. The regions between 77 to 90 latitudes of each hemisphere are called the permanent range of the polar climate zone . However, the maximum extent of the polar zone can spans up to from 53N to 90N and from 53S to 90S with an area total of 20\% of the body. At present day, the polar zones extend between 60 and 90 of both the northern and southern hemispheres (covering an area of 13\% of the planet). Pluto's biggest moon Charon also has a polar zone consisting of a polar cap.
after_revision: Tropical arctic The tropical arctic zone covers the overlapping regions of the tropical and arctic zones. This unique climatic zone is only possible on objects that have an obliquity range between 45 and 135. Since the obliquity of Pluto varies between a minimum of 103 and a maximum of 127, it therefore has a tropical arctic climate zone. This high obliquity implies that most of Pluto's surface experiences both tropical and arctic climates over the 2.8 million year obliquity cycle. The tropical arctic zone includes the region that overlaps between tropical and arctic zones extending between 13N to 77N and 13S to 77S. At this latitudinal range the zones cover 75\% of the total surface area. However, like the oscillation of tropical (between 53 and 77 latitude) and arctic (between 13 and 37 latitude) zones, the tropical arctic zone also expands and contrasts over the course of the obliquity cycle. Only the latitude range between 37 to 53 in each hemisphere remains stable over the period, and therefore, those bands are called the permanent tropical arctic zones on Pluto (which covers 20\% of the total area). Polar Pluto's polar zone comprises those areas where the Sun never reaches the zenith at any time of the orbital period of the dwarf planet over its entire obliquity cycle. This region always experiences arctic climate, never tropical climate, and it consistently experiences the longest duration of arctic winter and summer during each and every orbital rotation of Pluto. The polar zone has a radius of 13 from each pole. The zone spans from 77N to 90N and from 77S to 90S, encompassing an area total of 3\% of the dwarf planet. The regions between 77 to 90 latitudes of each hemisphere are called the permanent polar climate zones . However, the maximum extent of the polar zones can span from 53N to 90N and from 53S to 90S with an area total of 20\% of the body. At present day, the polar zones extend between 60 and 90 of both the northern and southern hemispheres (covering an area of 13\% of the planet). Pluto's biggest moon Charon also has a polar zone consisting of a polar cap.
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