Investigation of the Microburst Phenomena Based on Observations from the JAWS and MIST Projects

这项研究的目的是：(1)利用多多普勒雷达和二维云模式确定湿微暴流的强迫机制；(2)发展一种预报湿微暴流发生的技术，以此作为发布“风切变”警报的指南；(3)确定弓形回波的运动学/动力学结构。微暴流是一种极端的风切变事件，常与雷暴相联系，具有小的时空尺度特征。虽然偶尔会造成地表龙卷风般的破坏，但最严重的威胁是对生命的威胁。近年来，两个实地项目--JAWS和MIST被用于研究微爆发。

The objective of this research is: (1) to determine the forcing mechanism of the wet microburst using multi-Doppler radar and a 2 dimensional cloud model; (2) to develop a technique to forecast the occurrence of wet microbursts, that can be used as a guide to issue "wind shear" alerts; (3) to determine the kinetmatic/dynamic structure of the bow echo. The microburst is an extreme wind-shear event, often associated with thunderstorms, and characterized by small spatial and temporal scales. Although it has on occasion caused tornado-force damage at the surface, the most serious threat is to avaiation. Two field projects, JAWS and MIST have been operated in recent years to study the microburst.