Development and validation of an evaporation duct model. Part I: Model establishment and sensitivity experiments

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• 作者：Juli Ding ; Jianfang Fei ; Xiaogang Huang …
• 关键词：evaporation duct ; flux ; profile relationship ; stability function ; velocity roughness length ; scalar roughness length
• 刊名：Journal of Meteorological Research
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：29
• 期：3
• 页码：467-481
• 全文大小：1,453 KB
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• 作者单位：Juli Ding (1)
  Jianfang Fei (1)
  Xiaogang Huang (1)
  Xiaoping Cheng (1)
  Xiaohua Hu (2)
  Liang Ji (3)
  
  1. Institute of Meteorology and Oceanography, PLA University of Science and Technology, Nanjing, 211101, China
  2. Mailbox 5111, Beijing, 100081, China
  3. Institute of Philosophy, PLA University of Science and Technology, Nanjing, 211101, China
  
• 刊物类别：Atmospheric Sciences; Meteorology; Geophysics and Environmental Physics; Atmospheric Protection/Air
• 刊物主题：Atmospheric Sciences; Meteorology; Geophysics and Environmental Physics; Atmospheric Protection/Air Quality Control/Air Pollution;
• 出版者：The Chinese Meteorological Society
• ISSN：2198-0934

文摘

Based on the Coupled Ocean-Atmospheric Response Experiment (COARE) bulk algorithm and the Naval Postgraduate School (NPS) model, a universal evaporation duct (UED) model that can flexibly accommodate the latest improvements in component (such as stability function, velocity roughness, and scalar roughness) schemes for different stratification and wind conditions, is proposed in this paper. With the UED model, the sensitivity of the model-derived evaporation duct height (EDH) to stability function (ψ), ocean wave effect under moderate to high wind speeds, and scalar roughness length parameterization, is investigated, and relative contributions of these factors are compared. The results show that the stability function is a key factor influencing the simulated EDH values. Under unstable conditions, the EDH values from stability functions of Fairall et al. (1996) and Hu and Zhang (1992) are generally higher than those from others; while under stable conditions, unreasonably high EDHs can be avoided by use of the stability functions of Hu and Zhang (1992) and Grachev et al. (2007). Under moderate to high wind speeds, the increase in velocity roughness length z ₀ due to consideration of the true ocean wave effect acts to reduce modeled EDH values; this trend is more pronounced under stable conditions. Although the scalar roughness length parameterization has a minor effect on the model-derived EDH, a positive correlation is found between the scalar roughness length z _0q and the model-derived EDH. Key words evaporation duct flux-profile relationship stability function velocity roughness length scalar roughness length