TITLE:
Characteristic Analysis of Short Time Heavy Rain in Yulin, China
AUTHORS:
Yiqing Xiao, Qiyuan Hu, Pingyun Li, Jing Yao
KEYWORDS:
Short-Time Rain Storm, Precipitable Water, Vapor Flux Divergence, Train Effect
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.11 No.9,
September
19,
2023
ABSTRACT: National Centers for Environment Prediction (NCEP) reanalysis data,
automatic observation data, FY-2E satellite data and
Doppler radar data are used to analyze a short-time local heavy rain in Yulin city, Shaanxi, China on August 7, 2018. The result shows
that the strong convective weather occurred in peripheral subtropical high over
west pacific, being caused by short wave disturbance, and surface convergence
lines with positive pressure variation are corresponding to areas of short-time
heavy precipitation. The degree of temperature change in cold pool caused by
thunderstorm may decide the intensity of a short-time rainfall, and local
topography plays an important role in extreme
precipitation. Local water vapour accumulation and water vapour flux
convergence in the middle and lower layers support adequate moisture condition
in the process. Moving direction and development direction of mesocale
convective cloud are in a line to develop the train effect, leading to local
short-time heavy rain in Yulin city, Shaanxi, China.