Final answer:
A southbound flight in the Arctic Control Area must report to ATC at each 10-degree interval of latitude, including 80 degrees North. The location of the Arctic Circle and the Tropic of Cancer is dependent on Earth's tilt, and a lesser tilt would result in milder seasonal changes.
Step-by-step explanation:
A flight in the Arctic Control Area flying Southbound is required to report to ATC over fixed reporting lines coinciding with each 10 degrees of latitude North or South of, including 80 degrees North Latitude. Pilots must communicate with air traffic control when they cross these specified latitudes to ensure the safety and efficiency of air traffic within the Arctic region.
Additionally, if we consider the effects of Earth's tilt on the geographic locations such as the Arctic Circle and Tropic of Cancer, we find the Arctic Circle at a latitude equal to 90° minus Earth's tilt. Thus, if the Earth had a tilt of 16°, the Arctic Circle would be at 74°N (90° - 16° = 74°N), and the Tropic of Cancer would be at a latitude equal to Earth's tilt, or 16°N. The difference between these two latitudes would be 58°.
Changes in Earth's axial tilt would have significant implications for seasonal weather patterns, with a lesser tilt leading to milder seasonal changes and less variation in the Sun's path throughout the year.