The OWLeS IOP2b Lake-Effect Snowstorm: Shoreline Geometry and the Mesoscale Forcing of Precipitation
The OWLeS IOP2b Lake-Effect Snowstorm: Shoreline Geometry and the Mesoscale Forcing of Precipitation
复制标题
OWLeS IOP2b 湖泊效应暴风雪：海岸线几何形状和中尺度降水强迫
DOI：
10.1175/mwr-d-16-0460.1
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发表时间：
2017
影响因子：
3.2
通讯作者：
L. Campbell
中科院分区：
文献类型：
--
作者：
W. J. Steenburgh;L. Campbell
摘要长湖轴平行（LLAP）湖效应降水系统是当水流平行于一个细长水体的长轴时形成的，它经常产生强烈的、高度局域化的降雪。这些LLAP系统的概念模型通常强调来自两侧海岸线的热强迫陆风的作用，低层辐合和上升以湖轴附近为中心。实际上，海岸线几何形状和不同表面粗糙度等其他因素也会对LLAP系统产生强烈影响。本文利用WRF模式模拟研究了安大略省冬季湖效应系统（OWLeS）野外活动IOP2b期间安大略湖湖效应降水的中尺度强迫。在模拟中，大尺度气流、海岸线几何形状、地表温差加热和粗糙度对三大气团边界的发展起着重要作用。第一个是陆风锋面，沿着圣凯瑟琳、安大略、加拿大和加拿大之间的南海岸线隆起形成。
AbstractLong-lake-axis-parallel (LLAP) lake-effect precipitation systems that form when the flow is parallel to the long axis of an elongated body of water frequently produce intense, highly localized snowfall. Conceptual models of these LLAP systems typically emphasize the role of thermally forced land breezes from the flanking shorelines, with low-level convergence and ascent centered near the lake axis. In reality, other factors such as shoreline geometry and differential surface roughness can strongly influence LLAP systems. Here a WRF Model simulation is used to examine the mesoscale forcing of lake-effect precipitation over Lake Ontario during IOP2b of the Ontario Winter Lake-effect Systems (OWLeS) field campaign. In the simulation, the large-scale flow, shoreline geometry, and differential surface heating and roughness contribute to the development of three major airmass boundaries. The first is a land-breeze front that forms along a bulge in the south shoreline between St. Catharines, Ontario, Can...