Influence of the Track Forecast of Typhoon Prapiroon on the Heavy Rainfall in Western Japan in July 2018

Influence of the Track Forecast of Typhoon Prapiroon on the Heavy Rainfall in Western Japan in July 2018
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台风普皮隆路径预报对2018年7月日本西部强降雨的影响

DOI:
10.2151/sola.15a-012
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发表时间:
2019
期刊:
影响因子:
1.9
通讯作者:
Takeshi Enomoto
Takeshi Enomoto
中科院分区:
地球科学4区
文献类型:
--
作者:
Takeshi Enomoto

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2018年7月暴雨事件的可预报性通过全球大气预报业务模式的预报试验进行了检验。不同初始时刻的试验结果表明,7月6日最大降水量的总体分布可以从12 UTC、6月30日及以后预报出来。在成功的预报中,台风“派比安”的路径对最佳路径的误差较小。在较长的前置时间的实验中,相比之下,Baiu锋区有一个偏北的降水较少,和Prapiroon几乎没有发展和向西迁移。路径预报不佳似乎与涡旋的垂直发展有限有关。近地面等效位温和Q矢量分析表明,北赤道锋区的加强与北赤道锋区的加强有关。因此,正确的路径预报对白鸥锋生和西日本强降水的形成至关重要。(引用:Enomoto,T.,2019年:台风派比安的路径预报对2018年7月西日本强降雨的影响。SOLA,15A,66−71,doi:10.2151/sola.15A-012.)
The predictability of the Heavy Rain Event in July 2018 is examined by forecast experiments with an operational global atmospheric forecast model. Experiments from different initial times show that the overall rainfall distribution at the peak on 6 July can be predicted from 12 UTC, June 30, and later. In the successful forecasts, the track error of Typhoon Prapiroon against the best track is small. In the experiments with longer lead times, by contrast, the Baiu frontal zone has a northwared bias with less precipitation, and Prapiroon hardly develop and migrates westward. Poor track forecasts seem to be related to the limited vertical development of the vortex. Near surface equivalent potential tempeature and Q-vector analysis show that Prapiroon act to intensify the Baiu frontal zone. In conclusion, the correct track forecast is essential for Baiu frontogenesis and the formation of heavy precipitation in western Japan. (Citation: Enomoto, T., 2019: Influence of the track forecast of Typhoon Prapiroon on the heavy rainfall in western Japan in July 2018. SOLA, 15A, 66−71, doi:10.2151/sola.15A-012.)
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