Which boundary currents are characterized as narrow and deep with sharp boundaries?

Western boundary currents are indeed characterized as narrow and deep with sharp boundaries. These currents arise due to the Coriolis effect, which causes the deflection of water to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. As a result, western boundary currents, such as the Gulf Stream, flow along the western edge of ocean basins, transporting warm water from the equator towards the poles.

The narrow and deep nature of these currents allows them to maintain well-defined edges, creating significant gradients in temperature and salinity. This sharp boundary is essential because it leads to different oceanic conditions on either side of the current, influencing marine life, climate, and weather patterns. The properties of western boundary currents contrast significantly with other types of currents, which may not exhibit the same sharp boundaries or depth characteristics.

In contrast, other options, such as transverse and eastern boundary currents, typically present broader and shallower profiles. Surface currents, while important for ocean circulation, differ in their characteristics from the deep, narrow profile characteristic of western boundary currents.