摘要
[Objective] The aim was to study the rainstorm process in a single station on July 19, 2010. [Method] Based on MICAPS conventional data and Doppler radar data, the rainstorm process in Dagang station in Tianjin on July 19, 2010 was analyzed systematically by means of weather dynamic diagnosis analysis. [Result] From physical vector diagnostic analysis, the dynamic effect provided by southwest vortex and warm shear line, water vapor transported by warm and wet flow at the edge of subtropical high and upper and lower jet and unstable convection of atmospheric stratification were the main causes of rainstorm formation on July 19, 2010. In addition, rainfall area was located in the big convergence area of vapor flux, and there was a negative center of vapor flux divergence before rainfall, with obvious accumulation of water vapor, which provided better water vapor condition for this rainstorm. [Conclusion] The study could provide theoretical foundation for the forecast of rainstorm in Tianjin.
[Objective] The aim was to study the rainstorm process in a single station on July 19, 2010. [Method] Based on MICAPS conventional data and Doppler radar data, the rainstorm process in Dagang station in Tianjin on July 19, 2010 was analyzed systematically by means of weather dynamic diagnosis analysis. [Result] From physical vector diagnostic analysis, the dynamic effect provided by southwest vortex and warm shear line, water vapor transported by warm and wet flow at the edge of subtropical high and upper and lower jet and unstable convection of atmospheric stratification were the main causes of rainstorm formation on July 19, 2010. In addition, rainfall area was located in the big convergence area of vapor flux, and there was a negative center of vapor flux divergence before rainfall, with obvious accumulation of water vapor, which provided better water vapor condition for this rainstorm. [Conclusion] The study could provide theoretical foundation for the forecast of rainstorm in Tianjin.
