Radar and Profiler Analysis of Colliding Boundaries: A Case Study
Radar and Profiler Analysis of Colliding Boundaries: A Case Study
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碰撞边界的雷达和剖面仪分析：案例研究
DOI：
10.1175/2008mwr2763.1
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发表时间：
2009
影响因子：
3.2
通讯作者：
K. Knupp
中科院分区：
文献类型：
--
作者：
H. Karan;K. Knupp
本文利用WSR-88 D多普勒天气监视雷达和移动的综合廓线系统（MIPS）资料，分析了两个阵风锋迎头相撞，随后第三个阵风锋与初始碰撞产生的内孔发生二次碰撞的运动学过程。每一个阵风锋在最初的碰撞表现出近南北方向和东西运动。向东移动的边界比向西移动的边界冷2°C，移动速度快7 m s−1。二维风检索揭示对比流动在每个重力流。一个表现出一个典型的重力流的流动结构，而另一个假设的重力波/流的混合物的形式与多个漩涡顶部流出。碰撞后的边界之一显示出多个雷达细线，类似于碰撞后不久的孤波。碰撞后1 h左右，一股强烈的阵风锋将东移的气旋包围。
Abstract The kinematics of a head-on collision between two gust fronts, followed by a secondary collision between a third gust front and a bore generated by the initial collision, are described using analyses of Weather Surveillance Radar-1988 Doppler (WSR-88D) and Mobile Integrated Profiling System (MIPS) data. Each gust front involved in the initial collision exhibited a nearly north–south orientation and an east–west movement. The eastward-moving boundary was 2°C colder and moved 7 m s−1 faster than the westward-moving boundary. Two-dimensional wind retrievals reveal contrasting flows within each gravity current. One exhibited a typical gravity current flow structure, while the other assumed the form of a gravity wave/current hybrid with multiple vortices atop the outflow. One of the after-collision boundaries exhibited multiple radar finelines resembling a solitary wave shortly after the collision. About 1 h after the initial collision, a vigorous gust front intersected the eastward-moving bore severa...