Position: Home > Articles > Rainstorm Characteristics of “7.19” Hetao Area during the Process of Subtropical High Northward Jumping
Journal of Agricultural Catastrophology
2018,8
(5)
24-28
副高北抬过程中的“7.19”河套区域暴雨特征
作 者：
袁慧敏;李瑞青
关键词：
副高北抬;冷空气;MCS
摘 要：
利用常规气象资料、卫星资料、多普勒雷达产品、FNL(1°×1°)再分析资料,对2018年7月18—19日副高北抬降水过程中多个MCS的结构特征、形成机制和可预报性进行了分析。结果表明:该次副高北抬过程中,河套地区受850 hPa切变线和地面冷锋东移南下影响,锋面两侧湿度差异明显,锋前高温高湿高能,降水多以对流性降水为主,雨量分布不均。19日17:00,系统主体已过,巴彦淖尔市南部一带有850 hPa切变线南段滞留、θse密集,边界层具有明显偏东急流与辐合区,雷达回波在巴彦淖尔市东南部地区停留较长时间,并向包头缓慢移动。
译 名：
Rainstorm Characteristics of “7.19” Hetao Area during the Process of Subtropical High Northward Jumping
作 者：
YUAN Hui-min;Meteorological Station of Inner Mongolia Autonomous Region;
关键词：
Subtropical high northward jumping;;Cold air;;MCS
摘 要：
The structural characteristics,formation mechanisms and predictability of multiple MCS during the subtropical high northward jumping precipitation process from July 18 to 19, 2018 were analyzed using conventional meteorological data, satellite data, Doppler radar products and FNL(1° × 1°) reanalysis data. The results showed that: during the subtropical high northward jumping process, the Hetao area was affected by the850 hPa shear line and the ground cold front moving eastward and southward.The humidity on both sides of the front was obviously different. The ahead of front was high temperature, high humidity and high energy. The precipitation was dominated by convective precipitation, and the rainfall was unevenly distributed. At 17:00 on the 19 th, the main body of the system had passed. In the southern part of Bayannaoer City, the south section of the 850 hPa shear line was stranded and θse was dense. The boundary layer had obvious eastward jet and convergence zone. The radar echo stayed in the southeast of Bayannaoer City for a long time, and moved slowly to Baotou.
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