Analysis of information sources in references of the Wikipedia article "High-altitude balloon" in English language version.
On an average, wind speeds are minimum in the lower stratosphere, around 20 km altitude. Air density at 20 km is roughly 1/20 that at sea level.
Average wind speed in the stratosphere is minimal at altitudes of about 20 km. Values vary with season and location. Source: National Weather Service (NWS)
Average wind speed in the stratosphere is minimal at altitudes of about 20 km. Values vary with season and location. Source: National Weather Service (NWS)
On an average, wind speeds are minimum in the lower stratosphere, around 20 km altitude. Air density at 20 km is roughly 1/20 that at sea level.
Average wind speed in the stratosphere is minimal at altitudes of about 20 km. Values vary with season and location. Source: National Weather Service (NWS)
Average wind speed in the stratosphere is minimal at altitudes of about 20 km. Values vary with season and location. Source: National Weather Service (NWS)