A simulation and sensitivity test of a rainstorm caused by the Southwest China Vortex (SWCV) from 29 to 30 June 2013 was done based on the intensive observation during flood period, using the Southwest Center-WRF ADAS Real-time Modeling System (SWCWARMS). The results showed that compared with the control experiment, the distribution of rainfall in assimilation experiment was more similar with the actual precipitation and the assimilation experiment successfully simulated the heavy rainfall center in eastern Sichuan. In vortex simulation, it exhibited earlier generation of SWCV and also its stronger vorticity. Meanwhile, seen from the differences of two experiments, the lower pressure, stronger vorticity and larger rotational wind turbulence could be figured out at the initial values in the assimilation experiment at the middle-low troposphere in Sichuan Basin. There was a stronger upward motion, which promoted the generation and development of SWCV. In addition, assimilating intensive observation during flood period obviously improved the rainfall forecast of single station. Therefore, intensify meteorological observation during flood period is beneficial to reveal the SWCV generation, development and rainfall effects, which also can enhance the operational skill of numerical weather prediction.
CHENG Xiaolong
,
LI Yueqing
,
XU Xiangde
,
HENG Zhiwei
. Research and Numerical Simulation of a Torrential Rain Caused by the Southwest China Vortex during Flood Period[J]. Plateau Meteorology, 2019
, 38(2)
: 359
-367
.
DOI: 10.7522/j.issn.1000-0534.2017.00078
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