Surface wind, Geostrophic wind, Upper wind (thermal wind)
January 24, 2026
What’s wind? horizontal movement of air due to pressure differences in various places Surface wind is the geostrophic wind modified by friction Geostrophic wind is the wind of which direction parallel to straight isobar. The strength is depended on spacing between isobars Upper wind (thermal wind) is determined by thermal gradient. For example, the jet
