Near‐Surface Maximum Winds During the Landfall of Hurricane Harvey
Near‐Surface Maximum Winds During the Landfall of Hurricane Harvey
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DOI：
10.1029/2018gl080013
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发表时间：
2019-01
影响因子：
5.2
通讯作者：
A. Alford;M. Biggerstaff;G. Carrie;John L. Schroeder;B. Hirth;Sean M. Waugh
中科院分区：
文献类型：
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作者：
A. Alford;M. Biggerstaff;G. Carrie;John L. Schroeder;B. Hirth;Sean M. Waugh
一个移动共享移动大气研究和教学(SMART)雷达部署在飓风哈维，并与科珀斯克里斯蒂，德克萨斯州，WSR-88D雷达协调，以恢复登陆期间的气流。空气动力学表面粗糙度估计和对数风廓线假设被用来将500米雷达获得的最大风场投影到地面附近。对数风速假设通过在风暴中进行的无线电探空仪探测得到了证实，而雷达风速估计则通过一系列StickNet进行了验证。对于这里检查的数据，雷达投影的均方根误差为3.9m/S，高偏差为2.3m/S。哈维眼壁的中尺度产生了雷达观测到的最强风。根据风力分析，哈维在登陆时顶多为3级飓风(50-58米/S持续风速)。这项研究论证了综合的远程和现场观测在绘制飓风登陆期间风速最大值的时空图方面的作用。
A mobile Shared Mobile Atmospheric Research and Teaching (SMART) radar was deployed in Hurricane Harvey and coordinated with the Corpus Christi, TX, WSR‐88D radar to retrieve airflow during landfall. Aerodynamic surface roughness estimates and a logarithmic wind profile assumption were used to project the 500‐m radar‐derived maximum wind field to near the surface. The logarithmic wind assumption was justified using radiosonde soundings taken within the storm, while the radar wind estimates were validated against an array of StickNets. For the data examined here, the radar projections had root‐mean‐squared error of 3.9 m/s and a high bias of 2.3 m/s. Mesovorticies in Harvey's eyewall produced the strongest radar‐observed winds. Given the wind analysis, Harvey was, at most, a Category 3 hurricane (50–58 m/s sustained winds) at landfall. This study demonstrates the utility of integrated remote and in situ observations in deriving spatiotemporal maps of wind maxima during hurricane landfalls.