What is the significance of the 25th parallel?
three-cell model An attempt to represent the atmospheric circulation systems over a hemisphere by three adjoining vertical cells of meridional surface motion, transferring energy from equatorial to polar regions.
At about 30 degrees latitude north and south, the cooled air descends back to the surface, pushing the air below it toward the equator, since air flows always move toward areas of low pressure.
With the converging air masses at the surface, the low surface pressure at 60° latitude causes air to rise and form clouds. The two air masses at 60° latitude do not mix well and form the polar front which separates the warm air from the cold air.
Why does air rise at 60 latitude?
The 24th parallel north is a circle of latitude that is 24 degrees north of the Earth’s equatorial plane, which is about 60 kilometres (37 mi) north of the Tropic of Cancer. It is the line which demarcates boundary between Pakistan and India in general area of Rann of Kutch.
The 25th parallel north is a circle of latitude that is 25 degrees north of the Earth’s equatorial plane. It crosses Africa, Asia, the Indian Ocean, the Pacific Ocean, North America and the Atlantic Ocean. The northernmost section of the border between Mauritania and Mali is defined by the parallel.