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AN ANALYSIS OF DISTRIBUTION AND MESOSCALE STRUCTURE OFPRECIPITATION ABOUT LANDFALL TROPICAL CYCLONE KOPPU (0915)
Ist Teil von
热带气象学报:英文版, 2016, Vol.22 (4), p.445-454
Erscheinungsjahr
2016
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Observation from automatic weather stations, radars and TRMM satellites are employed to investigate theprecipitation distribution of tropical cyclone (TC) Koppu (0915) that made landfall on Guangdong province in 2009.The results show that the precipitation of landfall TC Koppu is featured by significant asymmetry and mesoscalestructure, and occurs mainly to the left of its moving path. By examining the sea surface temperature (SST), water vaporflux, Q vector, vertical wind shear of environment etc., it is found out that the distribution of SST, water vaporconvergence, low-level convective ascending and vertical wind shear facilitates the TC precipitation to take place to theleft of the TC moving path. The mesoscale structure separated by Barnes band-pass filter presents that the precipitationof landfall KOPPU has some organized mesoscale spiral structures, which is around the TC center and composed of theform of belts or blocks. The heavy local rainfall of landfall TC Koppu is primarily associated with the rainfall due tomesoscale spiral structure.