In summer, high land temperature forms low pressure and low ocean temperature forms high pressure, but why is the typhoon on the ocean the center of cyclone low pressure? ?

This is related to the formation of typhoons. In tropical or subtropical oceans where the sea surface temperature exceeds 26℃, due to the high temperature near the ocean surface, a large amount of air expands and rises, which reduces the air pressure near the ocean surface and continuously supplements the inflow and rise of peripheral air. Affected by the geostrophic force, the inflowing air rotates. The rising air expands and cools, and when the water vapor in it cools and condenses into water droplets, it will release heat and promote the rising of the lower air. In this way, the air pressure near the ocean surface drops lower, and the air rotates more violently, eventually forming a typhoon. The word "continuous flow" shows that typhoons can only form at the low-level interface with strong temperature constancy like water.