Aero-Terms are designed to be a daily reminder of the terms,
names, acronyms and explanations of the unique language that
populates the aviation world. Aerospace, sport aviation, fixed
wing, helo, you name it... it's all fair game.
Aero-Terms should serve as a quick but intriguing reminder of
the terms you may use every day, or an introduction to an aspects
of the Aero-World you may not yet be familiar with. ANN also
encourages readers to go beyond the FMI link, and further research
any intriguing terms.
A term used in advisories and tropical summaries to indicate
that a cyclone has lost its "tropical" characteristics. The term
implies both poleward displacement of the cyclone and the
conversion of the cyclone's primary energy source from the release
of latent heat of condensation to baroclinic (the temperature
contrast between warm and cold air masses) processes. It is
important to note that cyclones can become extratropical and still
retain winds of hurricane or tropical storm force.