The upper flow pattern favoring the development of typhoon is a result of some proper arrangement of tropical upper tropospheric trough (TUTT) and its cold vortices, the upper tropospheric anticyclone of the Tibetan Plateau and the equatorial buffer zone.

• 这种最有利于台风发生发展的高空形势,常常是向西延伸的大洋中部槽和槽中的冷涡、青藏高压、副热带高压和近赤道高压脊等行星尺度天气系统恰当配置的结果。