Microbaroms and the Temperature and Wind of the Upper Atmosphere
Microbaroms and the Temperature and Wind of the Upper Atmosphere
复制标题
微气压以及高层大气的温度和风
DOI：
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发表时间：
1972
期刊：
影响因子：
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通讯作者：
D. Rind
中科院分区：
文献类型：
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作者：
W. Donn;D. Rind
摘要微气压是由海浪辐射的次声（105参见周期）通过而产生的几微巴（达因cm−2）的有规律的压力变化。它们的振幅表现出明显的日变化、半日变化和季节变化，这取决于地表和海拔120公里之间是否存在一个或两个大气声导管。这些管道取决于大气的垂直温度和风结构。对于我们的电台（纽约州帕利塞兹），从最常见的微气压源（大西洋风暴）传输声音需要在某个较高反射水平处存在强东风。这些风的变化（如潮汐），来自现有的报告，被证明占所观察到的微气压模式。特别是，这些模式被证明是由潮汐和季节性风的变化和平流层变暖的影响。在确定了微气压对高空温度和风的依赖性之后，我们…
Abstract Microbaroms are regular pressure variations of a few microbars (dyn cm−2) produced by the passage of infrasound (∼5 see period) radiated from ocean waves. Their amplitudes show prominent diurnal, semidiurnal and seasonal variations that are shown to depend on the presence or absence of one or two atmospheric sound ducts between the surface and an elevation of ∼120 km. These ducts depend on the vertical temperature and wind structure of the atmosphere. For our station (Palisades, N.Y.), ducting of sound from the most common source of microbaroms (Atlantic Ocean storms) requires the presence of strong easterly winds at some upper reflection level. Variations (such as tidal) in these winds, as derived from available reports, are shown to account for the observed patterns of microbaroms. In particular, these patterns are shown to be controlled by effects of tidal and seasonal wind variations and stratospheric warmings. Having established the dependence of microbaroms on upper temperature and winds, w...