Application of harmonic analysis to ground heat flux determination by creating an artificial fundamental period
作者: Hans-Dieter WizemannVolker WulfmeyerThilo Streck
刊名: Meteorologische Zeitschrift, 2019, Vol.28 (6), pp.471-486
来源数据库: Schweizerbart Journal
DOI: 10.1127/metz/2019/0968
关键词: Ground heat fluxHarmonic analysisDamping depthEnergy balance closure
英文摘要: In the context of eddy-covariance measurements of land-surface atmosphere energy exchange and energy balance studies, soil temperature, soil water content and soil flux data were measured in the years 2009–2015 at three closely neighbored agricultural sites in Southwest Germany. Because the soil sensors had to be excavated for soil tillage, 22 periods with lengths between 85 and 322 days were evaluated. In the present study we used the data to evaluate the applicability of harmonic analysis (HA) for ground heat flux and soil surface temperature determination with one-half‑h resolution to time series of several months. The heat flux plate method with correction for heat storage served as reference. HA was performed by applying fast Fourier transformations to 2 cm-depth temperature time...
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关键词翻译
关键词翻译
  • fundamental 基本的
  • artificial 人为的
  • harmonic 谐波
  • analysis 分析
  • balance 平衡
  • determination 测定
  • closure 闭合
  • creating 生成
  • period 
  • Application 应用