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A case study of turbulent fluxes during a wintertime persistent cold air pool in the Salt Lake Valley.

机译：盐湖谷冬季持续性冷空气池湍流通量的案例研究。

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摘要

Local turbulence processes during the formation, maintenance and destruction of persistent cold air pools are relatively unknown. A wide variety of mechanisms are involved in the formation and destruction of persistent cold air pool that contribute to this problem. In this work, two persistent cold air pool episodes were observed during February 2004 in the Salt Lake valley. The two inversion episodes were separated by a brief 'washout' period when the persistent cold air pool was destroyed. The current research presents near surface turbulence measurements including fluxes of heat, momentum and water vapor during February 2004 from a measurement site located at the southwest end of the Salt Lake valley. The turbulence levels during the persistent cold air pool episodes compared to turbulence during a period that was not under the influence of a cold air pool were reduced by over 70%. Meteorological data from various regional weather monitoring stations have been utilized to conjecture two types of mixing scenarios during a persistent cold air pool namely, a surface based inversion scenario and a well-mixed surface layer capped by an elevated inversion. It is shown that both of these types of cold air pools can exist during a single persistent cold air pool episode.
机译：持久性冷气池的形成，维护和破坏过程中的局部湍流过程是相对未知的。导致此问题的持久性冷气池的形成和破坏涉及多种机制。在这项工作中，2004年2月在盐湖谷地观察到两个持续的冷气池发作。在持续的冷气池被摧毁时，这两个反转事件被短暂的“冲刷”期隔开。当前的研究提出了近地表湍流的测量，包括2004年2月在盐湖谷西南端的一个测量地点的热通量，动量和水蒸气通量。与不受冷空气池影响期间的湍流相比，持续的冷空气池发作期间的湍流水平降低了70％以上。来自各个区域气象监测站的气象数据已被用来推测持续性冷空气池中的两种混合情景，即基于地面的反演情景和由高反演覆盖的充分混合的表层。结果表明，这两种类型的冷气池都可以在单个持续性冷气池发作期间存在。

著录项

  • 作者

    Sriramasamudram, Jai K.;

  • 作者单位

    The University of Utah.;

  • 授予单位 The University of Utah.;
  • 学科 Engineering Mechanical.Meteorology.
  • 学位 M.S.
  • 年度 2010
  • 页码 100 p.
  • 总页数 100
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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