A Comparison of Two Optical Methods for Measuring Line Averages of Thermal Exchanges Above Warm Water Surfaces
A Comparison of Two Optical Methods for Measuring Line Averages of Thermal Exchanges Above Warm Water Surfaces
复制标题
测量温暖水面上热交换线平均值的两种光学方法的比较
DOI：
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发表时间：
1976
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影响因子：
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通讯作者：
M. Wesely
中科院分区：
文献类型：
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作者：
M. Wesely
摘要 通过使用两种光学、视线、遥感技术，可以在温暖的水面上方确定表面边界层中显热和潜热垂直传输的线平均值。在一种方法中，借助小型便携式天文望远镜目视观察大气引起的图像模糊量。另一种方法利用对下海市蜃楼形成的徒手观察，特别是似乎部分隐藏在海市蜃楼后面的远处物体的高度。在工业冷却池上方的本应用中，视线在距水面1m以内且长度为0.4至1.5km。热通量的评估还需要估计表面摩擦速度以及显热通量与潜热通量的比率，其中每一个都可以通过相对简单的温度和风速测量在温水表面上以足够的精度获得。直接目视测量...
Abstract Line averages of the vertical transports of sensible and latent heats in the surface boundary layer are determined above a warm water surface by the use of two optical, line-of-sight, remote-sensing techniques. In one method, the amount of atmospherically-induced blurring of images is observed visually with the aid of a small portable astronomical telescope. The other method utilizes unaided observations of the formation of inferior mirages, in particular the heights of distant objects that appear to be partially hidden behind the mirage. In the present application above industrial cooling ponds, lines of sight are within 1 m of the water surface and 0.4 to 1.5 km in length. The evaluation of the heat fluxes also requires estimates of the surface friction velocity and the ratio of the sensible to latent heat fluxes, each of which can be obtained with sufficient accuracy over a warm water surface from relatively simple measurements of temperatures and wind speeds. The direct visual measurements ar...