How does an increase in the annual melt season in Antarctica have a global effect?

The water in the melting glaciers can cause sea levels to rise.

Explanation:

The increase in the annual melt season in Antarctica has a worrisome effect worldwide. This is because caused by rising world temperatures, the increase in the annual melt season causes melting of the polar ice caps, and a consequent rise in sea level. Thus coastal cities can be compromised. This is a very serious problem to be taken into account, as according to the IPCC (Intergovernmental Panel on Climate Change) it is estimated that 1 billion people live in coastal regions subject to flooding.

This is a matter of concern to scientists around the world, as these scholars have noted the increasing meltdown and its effects on the global climate.

The increase in annual melt season in Antarctica have a global effect in which the water in the melting glaciers can cause sea levels to rise.