RESEARCH PROGRESS ON THE STRUCTURE AND INTENSITY CHANGE FOR THE LANDFALLING TROPICAL CYCLONES

CHEN Lian-shou

doi:10.3969/j.issn.1006-8775.2012.02.001

Abstract:

Landfalling tropical cyclones (LTCs) include those TCs approaching the land and moving across the coast. Structure and intensity change for LTCs include change of the eye wall, spiral rain band, mesoscale vortices, low-layer shear lines and tornadoes in the envelope region of TC, pre-TC squall lines, remote rain bands, core region intensity and extratropical transition (ET) processes, etc. Structure and intensity change of TC are mainly affected by three aspects, namely, environmental effects, inner core dynamics and underlying surface forcing. Structure and intensity change of coastal TCs will be especially affected by seaboard topography, oceanic stratification above the continental shelf and cold dry continental airflow, etc. Rapid changes of TC intensity, including rapid intensification and sudden weakening and dissipation, are the small probability events which are in lack of effective forecasting techniques up to now. Diagnostic analysis and mechanism study will help improve the understanding and prediction of the rapid change phenomena in TCs.

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CHEN Lian-shou. RESEARCH PROGRESS ON THE STRUCTURE AND INTENSITY CHANGE FOR THE LANDFALLING TROPICAL CYCLONES [J]. Journal of Tropical Meteorology, 2012, 18(2): 113-118, https://doi.org/10.3969/j.issn.1006-8775.2012.02.001

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RESEARCH PROGRESS ON THE STRUCTURE AND INTENSITY CHANGE FOR THE LANDFALLING TROPICAL CYCLONES

Chinese Academy of Meteorological Sciences, Beijing 100081 China

Received Date: 2011-09-30

Rev Recd Date: 2012-02-17

Abstract: Landfalling tropical cyclones (LTCs) include those TCs approaching the land and moving across the coast. Structure and intensity change for LTCs include change of the eye wall, spiral rain band, mesoscale vortices, low-layer shear lines and tornadoes in the envelope region of TC, pre-TC squall lines, remote rain bands, core region intensity and extratropical transition (ET) processes, etc. Structure and intensity change of TC are mainly affected by three aspects, namely, environmental effects, inner core dynamics and underlying surface forcing. Structure and intensity change of coastal TCs will be especially affected by seaboard topography, oceanic stratification above the continental shelf and cold dry continental airflow, etc. Rapid changes of TC intensity, including rapid intensification and sudden weakening and dissipation, are the small probability events which are in lack of effective forecasting techniques up to now. Diagnostic analysis and mechanism study will help improve the understanding and prediction of the rapid change phenomena in TCs.

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Reference (16)

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RESEARCH PROGRESS ON THE STRUCTURE AND INTENSITY CHANGE FOR THE LANDFALLING TROPICAL CYCLONES

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