Observations of Longitudinal Rolls in a Near Neutral Atmosphere
Observations of Longitudinal Rolls in a Near Neutral Atmosphere
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近中性大气中纵向滚转的观测
DOI：
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
J. Overland
中科院分区：
文献类型：
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作者：
B. Walter;J. Overland
本文利用飞机和卫星资料研究了2月份白令海近中性边界层（zi/L=-1.2，其中zi为逆温高度，L为Monin-Obukhov长度）纵向滚转涡的结构。在冰的裂缝和引线上形成的蒸汽雾被用作示踪剂，以描绘卫星图像中看到的各种尺度的滚动运动。卫星信息与NOAA P-3收集的飞机数据相结合表明存在一系列滚转涡运动。据认为，各种尺度的运动的相互作用导致某些尺度在一个区域占主导地位，而其他尺度在另一个区域占主导地位。两公里的波长变化归因于拐点不稳定机制，而12-15公里的变化被认为是由楚科奇半岛的上游地形加强。组织的雾银行的规模为30公里，也存在，可能是由于共振亚伤害…
Abstract Aircraft and satellite data an used to study the structure of longitudinal roll vortices in a nearly neutral (zi/L=-1.2, where zi is the inversion height and L is the Monin-Obukhov length) boundary layer over the ice-covered Bering Sea during February. Steam fog, formed over cracks and leads in the ice, was used as a tracer to delineate the various scales of roll motion seen in satellite images. The satellite information combined with aircraft data collected by the NOAA P-3 indicated the presence of a hierarchy of roll vortex motions. It is suggested that interactions of the various scales of motion resulted in certain scales dominating in one area and other scales dominating in another. Two-kilometer wavelength variations an attributed to the inflection point instability mechanism while 12–15 km variations seen to have been reinforced by the upstream topography on the Chukotka Peninsula. Organization of the fog banks on scales of 30 km was also present and may be attributable to resonant subharm...