This study aims to quantify the impact of typhoon‘Koppu’on infectious diarrhea in Guangdong,China in 2009.Rate ratios(RRs)were calculated by comparing person-time of infectious diarrhea cases between typhoon period ...This study aims to quantify the impact of typhoon‘Koppu’on infectious diarrhea in Guangdong,China in 2009.Rate ratios(RRs)were calculated by comparing person-time of infectious diarrhea cases between typhoon period and reference period.RRs of dysentery and other infectious diarrhea increased to a maximum of 1.12(95%CI,0.86-1.47),1.10(95%CI,1.00-1.20)on the展开更多
Observation from automatic weather stations, radars and TRMM satellites are employed to investigate the precipitation distribution of tropical cyclone(TC) Koppu(0915) that made landfall on Guangdong province in 2009.T...Observation from automatic weather stations, radars and TRMM satellites are employed to investigate the precipitation 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 mesoscale structure, and occurs mainly to the left of its moving path. By examining the sea surface temperature(SST), water vapor flux, Q vector, vertical wind shear of environment etc., it is found out that the distribution of SST, water vapor convergence, low-level convective ascending and vertical wind shear facilitates the TC precipitation to take place to the left of the TC moving path. The mesoscale structure separated by Barnes band-pass filter presents that the precipitation of landfall KOPPU has some organized mesoscale spiral structures, which is around the TC center and composed of the form of belts or blocks. The heavy local rainfall of landfall TC Koppu is primarily associated with the rainfall due to mesoscale spiral structure.展开更多
基金supported by National Basic Research Program of China(973 Program)(NO.2012CB955500-955502)
文摘This study aims to quantify the impact of typhoon‘Koppu’on infectious diarrhea in Guangdong,China in 2009.Rate ratios(RRs)were calculated by comparing person-time of infectious diarrhea cases between typhoon period and reference period.RRs of dysentery and other infectious diarrhea increased to a maximum of 1.12(95%CI,0.86-1.47),1.10(95%CI,1.00-1.20)on the
基金National(Key) Basic Research and Development(973) Program of China(2009CB421500)National Natural Science Foundation of China(40875026,91015011)Science and Technology Planning Project of Guangdong Province(2008B030303025)
文摘Observation from automatic weather stations, radars and TRMM satellites are employed to investigate the precipitation 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 mesoscale structure, and occurs mainly to the left of its moving path. By examining the sea surface temperature(SST), water vapor flux, Q vector, vertical wind shear of environment etc., it is found out that the distribution of SST, water vapor convergence, low-level convective ascending and vertical wind shear facilitates the TC precipitation to take place to the left of the TC moving path. The mesoscale structure separated by Barnes band-pass filter presents that the precipitation of landfall KOPPU has some organized mesoscale spiral structures, which is around the TC center and composed of the form of belts or blocks. The heavy local rainfall of landfall TC Koppu is primarily associated with the rainfall due to mesoscale spiral structure.
