| 非常规资料在沿海灾害暴雨过程中的应用分析 |
| 点此下载全文 |
| 引用本文：徐灵芝，许长义，卜清军，等..非常规资料在沿海灾害暴雨过程中的应用分析[J].气象与环境科学,2019,42(3):68-77.Xu Lingzhi,Xu Changyi,Bu Qingjun,et al.Application of Unconventional Data in the Severe Rain Event in Tianjin Coastal Areas[J].Meteorological and Environmental Sciences,2019,42(3):68-77. |
| 摘要点击次数: 383 |
| 全文下载次数: 123 |
|
| DOI：doi:10.16765/j.cnki.1673-7148.2019.03.009 |
| 基金项目: |
|
| 中文摘要:非常规资料在天津沿海一次灾害暴雨过程中的应用 |
| 中文关键词:非常规资料 液态水含量 低空急流 高质心结构 |
| |
| Application of Unconventional Data in the Severe Rain Event in Tianjin Coastal Areas |
|
|
| Abstract:Based on the data from wind profiler radar, microwave radiometer, FY satellite brightness temperature and Doppler weather radar detection, the torrential rain event happened on July 25, 2012 in Tianjin coastal areas is analyzed and studied. The results are as follows. 1)Mesoscale convective system is the main impact system for the torrential rain, surface mesoscale convergence leads to the radar echo train effect and results in a regional heavy rainstorm. Radar echo is characterized by high centroid structure during heavy rainfall, 5055 dBZ strong echo extends upwards over 0 ℃ to reach 6.5 km. The duration of the inversion area at multi elevation last nearly 3 hours and cyclonic convergence enhancement. There is a strong organization of convection. 2)The torrential rain is accompanied by the strong development of multiple mesoscale convective clouds, the cold center of the mature convective cloud mass reaches -63 ℃, the gradient of the contour of the rear of the cloud mass is large, exuberant convection is the key to strong precipitation. 3)The liquid water content in the cloud at the lower atmosphere is directly related the precipitation on the ground, the high liquid water concentrating upon 0.81.6 km, wet layer is deep before strong precipitation on the ground and the thickness of the wet layer decreases rapidly after precipitation. 4)The wind profiler radar has the ability to capture the indicative features of the rainstorm forecast. The establishment of boundary layer jet and low level jet appears 12 h ahead of the rainstorm. And the low level jet reaches the strongest before the rainstorm. The middle layer of weak cold air intrusion occurs 1 h ahead of the rainstorm, the jet can trigger boundary layer disturbance and low altitude disturbance 1020 min ahead of the rainstorm. |
| Keywords: |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|