The OWLeS IOP2b Lake-Effect Snowstorm: Mechanisms Contributing to the Tug Hill Precipitation Maximum
The OWLeS IOP2b Lake-Effect Snowstorm: Mechanisms Contributing to the Tug Hill Precipitation Maximum
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OWLeS IOP2b 湖效应暴风雪：导致 Tug Hill 最大降水量的机制
DOI：
10.1175/mwr-d-16-0461.1
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发表时间：
2017
影响因子：
3.2
通讯作者：
W. J. Steenburgh
中科院分区：
文献类型：
--
作者：
L. Campbell;W. J. Steenburgh
湖效应风暴经常在托格山高原（以下简称托格山）产生明显的降水最大值，该高原高于安大略湖东海岸500米。在这里，天气研究和预报模型模拟被用来检查负责拖船山降水最大观测期间的安大略冬季湖泊效应系统（OWLeS）现场程序的IOP2b的机制。一个关键的贡献者是沿着安大略湖东南海岸线形成的陆风锋，它向内陆和东北方向延伸，穿过拖船山，斜穿过湖效应系统。本地化的上升沿着这一边界的内陆降水最大值，即使在模拟中，拖船山被删除。拖船山的存在加强和扩大了上升区，增加了参数化的沉积和增生水凝物的增长，并减少了升华损失。陆风锋的内陆延伸及其对增雨的贡献。
AbstractLake-effect storms frequently produce a pronounced precipitation maximum over the Tug Hill Plateau (hereafter Tug Hill), which rises 500 m above Lake Ontario’s eastern shore. Here Weather Research and Forecasting Model simulations are used to examine the mechanisms responsible for the Tug Hill precipitation maximum observed during IOP2b of the Ontario Winter Lake-effect Systems (OWLeS) field program. A key contributor was a land-breeze front that formed along Lake Ontario’s southeastern shoreline and extended inland and northeastward across Tug Hill, cutting obliquely across the lake-effect system. Localized ascent along this boundary contributed to an inland precipitation maximum even in simulations in which Tug Hill was removed. The presence of Tug Hill intensified and broadened the ascent region, increasing parameterized depositional and accretional hydrometeor growth, and reducing sublimational losses. The inland extension of the land-breeze front and its contribution to precipitation enhancem...