Answer:
Ocean currents can have a significant effect on air temperature in coastal areas like Luderitz and Florianopolis.
Luderitz, located on the Atlantic coast of Namibia, is influenced by the cold Benguela Current which flows northward along the coast from Antarctica. This current cools the air above it, resulting in lower air temperatures in Luderitz compared to other locations at a similar latitude.
Florianopolis, on the other hand, is located on the Atlantic coast of Brazil and is influenced by the warm Brazil Current, which flows southward along the coast from the equator. This current warms the air above it, resulting in higher air temperatures in Florianopolis compared to other locations at a similar latitude.
Therefore, in both cases, the ocean currents play a significant role in determining the air temperature of the coastal areas.