Cold ocean currents affect climate by what

Currents can affect weather patterns on land. A cold ocean current will bring cold weather while a warm ocean current will bring hot weather

Idon't know. the question you are trying to ask doesn't make sense.

Geothermic gradient is the rate of increasing temperature with respect to increasing the depth in the earths interior. away from tech tonic plates boundaries, it is about 25-40 c/km (72-87 degrees f/mi) of depth near the surface in most of the world.