The Extreme Wind Events in the Ross Island Region of Antarctica
The Extreme Wind Events in the Ross Island Region of Antarctica
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DOI：
10.1175/waf-d-15-0125.1
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发表时间：
2016-06
影响因子：
2.9
通讯作者：
N. Weber;M. Lazzara;L. Keller;J. Cassano
中科院分区：
文献类型：
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作者：
N. Weber;M. Lazzara;L. Keller;J. Cassano
摘要在过去的十年中，美国南极计划（USAP）麦默多站由于极端风事件（EWEs）而发生了许多结构损坏事件。利用近20年（~1992-2013）的威斯康星州大学自动气象站（AWS）的数据，从三个不同的站在罗斯岛地区（飞马北，飞马南，威利场），统计分析表明，EWE频率，强度或持续时间没有显着的趋势。EWE更频繁地发生在过渡季节。为了评估这些EWE的动力环境，南极中尺度预报系统（AMPS）的预测后的轨迹计算和分析与其他几个AMPS领域的最强事件在麦默多站。天气分析表明，麦默多站EWEs几乎总是与强大的偏南气流，由于接近罗斯海气旋和上层槽周围的阿代尔角。罗斯冰架气流（RAS）环境是一个非常复杂的环境。
AbstractNumerous incidents of structural damage at the U.S. Antarctic Program’s (USAP) McMurdo Station due to extreme wind events (EWEs) have been reported over the past decade. Utilizing nearly 20 yr (~1992–2013) of University of Wisconsin automatic weather station (AWS) data from three different stations in the Ross Island region (Pegasus North, Pegasus South, and Willie Field), statistical analysis shows no significant trends in EWE frequency, intensity, or duration. EWEs more frequently occur during the transition seasons. To assess the dynamical environment of these EWEs, Antarctic Mesoscale Prediction System (AMPS) forecast back trajectories are computed and analyzed in conjunction with several other AMPS fields for the strongest events at McMurdo Station. The synoptic analysis reveals that McMurdo Station EWEs are nearly always associated with strong southerly flow due to an approaching Ross Sea cyclone and an upper-level trough around Cape Adare. A Ross Ice Shelf air stream (RAS) environment is cr...