季風低壓特性:
Monsoon depressions present unique difficulties to tropical forecasters, satellite analysts and METOC personnel due to their non-tropical cyclone Characteristics:
• Large cyclonic circulations (average size using outer most closed isobar ~ 600 nm diameter) that develop within the monsoon trough
• A loosely organized cluster of deep convective elements, which may form an elongated band of deep convection in the eastern semicircle
• Low-level wind distribution that features a core of light winds which may be surrounded by a band of gales or a highly asymmetric wind field
• Lack of a distinct cloud system center, rendering the conventional Dvorak intensity estimate technique unusable
• Multiple small, weak mesovortices that rotate cyclonically about a centroid
• Monsoon depressions that develop in the western North Pacific Ocean often acquire persistent central convection and accelerated core winds, marking their transition into conventional tropical cyclones
提升卡
千斤頂
