Journal cover Journal topic
Nonlinear Processes in Geophysics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 1.558 IF 1.558
  • IF 5-year value: 1.475 IF 5-year
    1.475
  • CiteScore value: 2.8 CiteScore
    2.8
  • SNIP value: 0.921 SNIP 0.921
  • IPP value: 1.56 IPP 1.56
  • SJR value: 0.571 SJR 0.571
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 55 Scimago H
    index 55
  • h5-index value: 22 h5-index 22
Volume 15, issue 6
Nonlin. Processes Geophys., 15, 915–929, 2008
https://doi.org/10.5194/npg-15-915-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.
Nonlin. Processes Geophys., 15, 915–929, 2008
https://doi.org/10.5194/npg-15-915-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.

  27 Nov 2008

27 Nov 2008

Structure function analysis and intermittency in the atmospheric boundary layer

J. M. Vindel1, C. Yagüe2, and J. M. Redondo3 J. M. Vindel et al.
  • 1Agencia Estatal de Meteorología, Madrid, Spain
  • 2Dept. Geofísica y Meteorología, Universidad Complutense de Madrid, Spain
  • 3Dept. Física Aplicada, Universidad Politécnica de Cataluña, Barcelona, Spain

Abstract. Data from the SABLES98 experimental campaign (Cuxart et al., 2000) have been used in order to study the relationship of the probability distribution of velocity increments (PDFs) to the scale and the degree of stability. This connection is demonstrated by means of the velocity structure functions and the PDFs of the velocity increments.

Using the hypothesis of local similarity, so that the third order structure function scaling exponent is one, the inertial range in the Kolmogorov sense has been identified for different conditions, obtaining the velocity structure function scaling exponents for several orders. The degree of intermittency in the energy cascade is measured through these exponents and compared with the forcing intermittency revealed through the evolution of flatness with scale.

The role of non-homogeneity in the turbulence structure is further analysed using Extended Self Similarity (ESS). A criterion to identify the inertial range and to show the scale independence of the relative exponents is described. Finally, using least-squares fits, the values of some parameters have been obtained which are able to characterize intermittency according to different models.

Publications Copernicus
Download
Citation