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Biogeosciences An interactive open-access journal of the European Geosciences Union
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Volume 7, issue 4 | Copyright

Special issue: CarboEastAsia

Biogeosciences, 7, 1271-1278, 2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.

  19 Apr 2010

19 Apr 2010

Surface layer similarity in the nocturnal boundary layer: the application of Hilbert-Huang transform

J. Hong1,2, J. Kim2,3, H. Ishikawa4, and Y. Ma5 J. Hong et al.
  • 1National Institute for Mathematical Sciences, Daejeon, Korea
  • 2Global Environment Lab, Department of Atmospheric Sciences, Yonsei University, Seoul, Korea
  • 3Global Center for Sustainable Urban Regeneration, Institute of Industrial Science, The University of Tokyo, Tokyo, Japan
  • 4Disaster Prevention Research Institute, Kyoto University, Kyoto, Japan
  • 5Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China

Abstract. Turbulence statistics such as flux-variance relationship are critical information in measuring and modeling ecosystem exchanges of carbon, water, energy, and momentum at the biosphere-atmosphere interface. Using a recently proposed mathematical technique, the Hilbert-Huang transform (HHT), this study highlights its possibility to quantify impacts of non-turbulent flows on turbulence statistics in the stable surface layer. The HHT is suitable for the analysis of non-stationary and intermittent data and thus very useful for better understanding the interplay of the surface layer similarity with complex nocturnal environment. Our analysis showed that the HHT can successfully sift non-turbulent components and be used as a tool to estimate the relationships between turbulence statistics and atmospheric stability in complex environments such as nocturnal stable boundary layer.

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