[Objective] The aim was to analyze a disastrous rainstorm process in Dandong region. [Method] Based on real time data, the primary diagnosis analysis of a disastrous rainstorm process on June 9, 2009 was carried out f...[Objective] The aim was to analyze a disastrous rainstorm process in Dandong region. [Method] Based on real time data, the primary diagnosis analysis of a disastrous rainstorm process on June 9, 2009 was carried out from the aspects of circulation pattern, influence system, the trigger action of low-level jet to rainstorm, stability and dynamic condition. [Result] Mongolia cyclone provided uplift power for rainstorm generation, and Changjiang-Huaihe shear line transported water vapor from south to north continually, while the water vapor flux convergence of southwest jet in southern Dandong was formed due to the stacking of southwest airflow in the east of Changjiang-Huaihe shear line in the west of subtropical high, so south water vapor accumulated and uplifted latent heat release in southern Dandong, and this strong rainfall lasted for a long time due to the strengthening of mesoscale ascending motion, thus leading to rainstorm. [Conclusion] The study could provide references for rainstorm prediction.展开更多
文摘[Objective] The aim was to analyze a disastrous rainstorm process in Dandong region. [Method] Based on real time data, the primary diagnosis analysis of a disastrous rainstorm process on June 9, 2009 was carried out from the aspects of circulation pattern, influence system, the trigger action of low-level jet to rainstorm, stability and dynamic condition. [Result] Mongolia cyclone provided uplift power for rainstorm generation, and Changjiang-Huaihe shear line transported water vapor from south to north continually, while the water vapor flux convergence of southwest jet in southern Dandong was formed due to the stacking of southwest airflow in the east of Changjiang-Huaihe shear line in the west of subtropical high, so south water vapor accumulated and uplifted latent heat release in southern Dandong, and this strong rainfall lasted for a long time due to the strengthening of mesoscale ascending motion, thus leading to rainstorm. [Conclusion] The study could provide references for rainstorm prediction.
