Gargantuan Hail in Argentina
Gargantuan Hail in Argentina
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DOI：
10.1175/bams-d-19-0012.1
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发表时间：
2020-08-01
影响因子：
8
通讯作者：
Salio, Paola
中科院分区：
文献类型：
--
作者：
Kumjian, Matthew R.;Gutierrez, Rachel;Salio, Paola
2018年2月8日，一场超级单体风暴产生了15厘米或6英寸的巨型风暴。冰雹在阿根廷科尔多瓦省人口稠密的城市卡洛斯·帕斯上空移动。观测到的巨大冰雹相当罕见，但这里的人口密度很大，产生了大量目击者和社交媒体上的照片和视频，记录了多次大冰雹。科尔多瓦新安装的作战极化C波段雷达也对风暴进行了采样。在Relampago活动期间，作者采访了当地居民，了解他们对风暴的描述，并发现了更多社交媒体视频和照片，显示该镇多个地点出现了极大的冰雹。本文记录了这一案例，包括支持风暴的气象条件(借助高分辨率的WRF模拟)、风暴观测到的雷达特征，以及居民观测到的三个值得注意的冰雹。这些冰雹包括一个冷冻保存的4.48英寸的冰雹。(11.38厘米)最大尺寸的石头，用7.1英寸的3D红外激光扫描仪扫描。(18厘米)最大尺寸的石头，以及摄影测量估计在7.4至9.3英寸之间的冰雹。(18.8-23.7厘米)，接近或超过世界最大尺寸纪录。这样一个观察良好的案例是在理解产生巨大冰雹的环境和风暴，以及最终如何预测和检测此类极端事件方面向前迈出的重要一步。
On 8 February 2018, a supercell storm produced gargantuan (>15 cm or >6 in. in maximum dimension) hail as it moved over the heavily populated city of Villa Carlos Paz in Cordoba Province, Argentina. Observations of gargantuan hail are quite rare, but the large population density here yielded numerous witnesses and social media pictures and videos from this event that document multiple large hailstones. The storm was also sampled by the newly installed operational polarimetric C-band radar in Cordoba. During the RELAMPAGO campaign, the authors interviewed local residents about their accounts of the storm and uncovered additional social media video and photographs revealing extremely large hail at multiple locations in town. This article documents the case, including the meteorological conditions supporting the storm (with the aid of a high-resolution WRF simulation), the storm's observed radar signatures, and three noteworthy hailstones observed by residents. These hailstones include a freezer-preserved 4.48-in. (11.38 cm) maximum dimension stone that was scanned with a 3D infrared laser scanner, a 7.1-in. (18 cm) maximum dimension stone, and a hailstone photogrammetrically estimated to be between 7.4 and 9.3 in. (18.8-23.7 cm) in maximum dimension, which is close to or exceeds the world record for maximum dimension. Such a well-observed case is an important step forward in understanding environments and storms that produce gargantuan hail, and ultimately how to anticipate and detect such extreme events.