Observing Hurricane Harvey’s Eyewall at Landfall
Observing Hurricane Harvey’s Eyewall at Landfall
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DOI：
10.1175/bams-d-17-0237.1
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发表时间：
2019-05
影响因子：
8
通讯作者：
Pedro L. Fernández-Cabán;A. Alford;M. Bell;M. Biggerstaff;G. Carrie;B. Hirth;K. Kosiba;B. Phillips;J. Schroeder;S. Waugh;Eric Williford;J. Wurman;F. Masters
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文献类型：
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作者：
Pedro L. Fernández-Cabán;A. Alford;M. Bell;M. Biggerstaff;G. Carrie;B. Hirth;K. Kosiba;B. Phillips;J. Schroeder;S. Waugh;Eric Williford;J. Wurman;F. Masters
虽然飓风哈维将最好地记住创纪录的降雨量，导致德克萨斯州东南部和路易斯安那州西部的大范围洪水，但风暴也产生了一些最极端的风速，这些风速是自适应中尺度网在登陆时捕获的。本文介绍了独特的工具和数字飓风联盟（DHC），大气科学家和风力工程师的特设小组使用的策略，拦截和收集高分辨率测量哈维的内核和眼墙，因为它通过阿兰萨斯湾进入得克萨斯州大陆。DHC成功地部署了超过25个观测资产，从而获得了一个大型飓风登陆时的边界层和风眼墙高空的前所未有的视图。在强对流期间，风速测量和移动的雷达数据的分析显示了飓风登陆时的运动学结构，以及高空环流对地面风和极端地面阵风的疑似影响。在眼壁内部的中尺度涡的证据也被提出。最后，该文件报告的大气探测的内眼壁，产生了异常大的和潜在的记录值的可降水量在美国大陆的观测探测。
While Hurricane Harvey will best be remembered for record rainfall that led to widespread flooding in southeastern Texas and western Louisiana, the storm also produced some of the most extreme wind speeds ever to be captured by an adaptive mesonet at landfall. This paper describes the unique tools and the strategy used by the Digital Hurricane Consortium (DHC), an ad hoc group of atmospheric scientists and wind engineers, to intercept and collect high-resolution measurements of Harvey’s inner core and eyewall as it passed over Aransas Bay into mainland Texas. The DHC successfully deployed more than 25 observational assets, leading to an unprecedented view of the boundary layer and winds aloft in the eyewall of a major hurricane at landfall. Analysis of anemometric measurements and mobile radar data during heavy convection shows the kinematic structure of the hurricane at landfall and the suspected influence of circulations aloft on surface winds and extreme surface gusts. Evidence of mesoscale vortices in the interior of the eyewall is also presented. Finally, the paper reports on an atmospheric sounding in the inner eyewall that produced an exceptionally large and potentially record value of precipitable water content for observed soundings in the continental United States.