Low and High Broadband Spectral Models of Atmospheric Pressure Fluctuation
Low and High Broadband Spectral Models of Atmospheric Pressure Fluctuation
复制标题
大气压力波动的低和高宽带光谱模型
DOI：
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复制
发表时间：
2021
影响因子：
2.2
通讯作者：
A. Kramer
中科院分区：
文献类型：
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作者：
J. Marty;B. Doury;A. Kramer
本文提出了在(10−，5-8)赫兹频率范围内地球表面压力起伏的新的低功率谱密度和高功率谱密度模型。以前提出的模型往往包括局限性，例如频率范围窄得多，包括错误的和未校准的数据或未从测量系统响应中去卷积的记录数据。最近在压力波动测量系统的响应建模和现场校准方面取得的进展使我们能够在极大的频带上提出更真实的功率谱密度模型。本文描述了如何选择、处理和分析数据以获得最终的全局模型。此外，中间结果还允许描述几种大气机制，如重力波饱和、浮力极限和声学截止频率或风湍流模式。这两个拟议的低功率和高功率谱密度模型计划用于广泛的应用，包括评估测量的压力波动的质量，验证模拟的压力波动的有效性，以及支持新一代测量系统的设计、测试和校准。本文中提出的模型可供科学界使用。
This paper presents new low and high power spectral density models for pressure fluctuations at the Earth’s surface over the frequency range of (10−5 – 8) Hz. Previously proposed models often included limitations, such as a much narrower frequency range, the inclusion of erroneous and non-calibrated data or recorded data not deconvolved from the measurement system responses. The progress recently made with response modeling and field calibration of pressure fluctuation measurement systems now allows to propose more realistic power spectral density models over an extremely large frequency band. This paper describes how the data were selected, processed, and analyzed to obtain the final global models. In addition, the intermediate results allow the characterization of several atmospheric mechanisms, such as gravity wave saturation, limits of the buoyancy and acoustic cut-off frequencies or wind turbulence modes. The two proposed low and high power spectral density models are planned to be used for a wide range of applications, including assessing the quality of measured pressure fluctuations, verifying the validity of modeled pressure fluctuations and supporting the design, testing and calibration of a new generation of measurement systems. The models presented in this paper are made available to the scientific community.