TROPICAL DEPRESSION 1000 HPA AT 18N 110E EAST SLOWLY.
兩盒,謝謝!
2021-7-26 13:04:49
死都唔降
又唔見得有條件返生
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黃浩賢後援會主席
2021-7-26 14:01:50
NHC對副熱帶氣旋既定義:
A non-frontal low-pressure system that has characteristics of both tropical and extratropical cyclones.
Like tropical cyclones, they are non-frontal, synoptic-scale cyclones that originate over tropical or subtropical waters, and have a closed surface wind circulation about a well-defined center. In addition, they have organized moderate to deep convection, but lack a central dense overcast.
Unlike tropical cyclones, subtropical cyclones derive a significant proportion of their energy from baroclinic sources, and are generally cold-core in the upper troposphere, often being associated with an upper-level low or trough. In comparison to tropical cyclones, these systems generally have a radius of maximum winds occurring relatively far from the center (usually greater than 60 n mi), and generally have a less symmetric wind field and distribution of convection.