ジェットストリーム (Jet Stream)
定義
A narrow band of strong winds (100-200 kt) at high altitudes affecting flight times and routing
関連用語
晴天乱気流 (CAT: Clear Air Turbulence)
Turbulence occurring in cloudless areas, often near jet streams, invisible to radar
大圏航路 (GCR: Great Circle Route)
The shortest path between two points on the Earth's surface, commonly used in long-haul aviation
逆風 (Headwind)
A wind blowing directly opposite to the direction of aircraft travel, reducing ground speed
追い風 (Tailwind)
A wind blowing in the same direction as the aircraft's travel, increasing ground speed
関連ガイド
Contrails and Climate: The Hidden Impact
How condensation trails trap heat, why they may double aviation's warming effect, and what airlines are doing about contrail avoidance.
Why Flying Higher Saves Fuel
The physics of altitude and fuel efficiency — thinner air, optimal cruise levels, step climbs, and how ATC constraints affect efficiency.