Orographic Microbursts in a Severe Winter Windstorm

机译：在严重的冬季风暴中的地形微爆

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Orographic microbursts in a remarkable winter wind storm caused severe damage tothe San Juan Islands and coastal regions of Washington State on December 28, 1990. The microbursts, associated with trapped lee mountain waves, produced winds in excess of 50 m/s on Guemes Island. The damage patterns of the tree fall and debris reveal small scale swaths and pockets of high winds similar to those patterns caused by convective downbursts. Analysis of large scale features reveal that an underlying cause of the strong winds was a strong pressure gradient behind an arctic front. The strong pressure gradient was due to cold air damming on the eastern slopes of the Canadian Coast and Cascade Mountains. Gap wind acceleration was noted over Puget Sound by the sharp boundary between the high speed jet of dry air emanating from the Fraser River Valley, a gap between the Coast and Cascade Mountains, and the ambient lower speed marine winds.

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Tucker, Z. A.;
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年度 1993
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总页数 49
原文格式 PDF
正文语种 eng
中图分类工业技术;
关键词
Wind; Storms; Gusts; Orography; Mountains; Winter; Air water interactions; Islands; Coastal regions; Pacific Ocean; Convection(Atmospheric); Washington(State); Damage; Theses; Marine climatology; Wind velocity; Barometric pressure; Atmospheric temperature;

机译：风;风暴;阵风;地形;山脉;冬季;空气与水的相互作用;岛屿;沿海地区;太平洋;对流（大气层）;华盛顿（州）;损害;论文;海洋气候学;风速;气压;大气温度;

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Orographic Microbursts in a Severe Winter Windstorm

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