What is the definition of a wind current?
The Earth is 24,000miles in circumference at the equator and it takes 24hours to rotate (anti-clockwise in the northern hemisphere). Which means that the surface of the Earth there (on the equator) is moving at 1,000mph to the east. On a calm windless day the air would be travelling at 1,000mph. It is only when the air is travelling at a different speed or direction to the ground that you feel the wind. Air travelling east at 1,010mph would produce a wind of 10mph on the equator. Further north the circumference of the Earth gets progressively less but it still takes 24 hours to rotate, so the surface is moving slower. I hope this is the answer you are looking for. If you are stuck it’s better than a blank page.
