Changes in water temperature affect the density of the water. Water density is important for deep ocean currents that move water around the oceans. With increasing greenhouse gases in the atmosphere, the ocean is absorbing more and more heat. The Beaufort Gyre is a circular current in the Arctic. Which of the following is the most reasonable hypothesis as to what would happen to the Beaufort Gyre if the oceans keep warming?

The water would get warmer and would not sink to the bottom, and therefore disrupt the worldwide currents.

The water would get colder and sink to the bottom, then take longer to warm up disrupting currents.

The water would change temperature and begin to circulate in the opposite direction.

The water would get much warmer and cause part of any nearby continental ice sheet to melt.