Airborne Doppler Radar Analysis of Supercells during COPS-91
Airborne Doppler Radar Analysis of Supercells during COPS-91
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COPS-91 期间超级电池的机载多普勒雷达分析
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
D. Jorgensen
中科院分区：
文献类型：
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作者：
D. Dowell;H. Bluestein;D. Jorgensen
1991年5月26日，在合作俄克拉荷马剖面研究（COPS-91）野外项目中，NOAA P-3机载多普勒雷达在南部平原两个龙卷风超级单体附近收集了数据。安装在飞机尾部的3厘米雷达使用前后扫描技术（FAST）操作。两次风暴都是在每次产生龙卷风几分钟后进行采样的。COPS-91风暴是第一个使用FAST方法进行机载多普勒雷达广泛采样的龙卷风超级单体。对堪萨斯州西南部一场消散的风暴的伪双多普勒分析显示，尽管风暴刚刚产生了龙卷风，但没有剩余的低层环流。对俄克拉何马州西北部风暴的分析揭示了地表附近风场的更好定义特征。与之前在龙卷风后的超级单体中观察到的情况相反，两次风暴的气旋涡度在高空比在低层更大。1991年5月26日的风暴进一步证明了超级单体经常……
Abstract On 26 May 1991, NOAA P-3 airborne Doppler radar data were collected near two tornadic supercells in the southern Plains during the Cooperative Oklahoma Profiler Studies (COPS-91) field program. The 3-cm radar mounted in the tail of the aircraft was operated using the fore–aft scanning technique (FAST). Both storms were sampled just minutes after each had produced a tornado. The COPS-91 storms are the first tornadic supercells to be sampled extensively by airborne Doppler radar using the FAST methodology. Pseudo-dual-Doppler analyses of a dissipating storm in southwest Kansas show no remaining low-level circulation, even though the storm had just produced a tornado. The analyses of a storm in northwest Oklahoma reveal better-defined features in the wind field near the surface. In contrast to what has been previously observed in post-tornadic supercells, the cyclonic vorticity in both storms was greater aloft than at low levels. The 26 May 1991 storms provide further evidence that supercells often ...