caa a22 4500 475777719 CHVBK 20180406123635.0 cr unu---uuuuu 170329e20000501xx s 000 0 eng 10.1023/A:1002697221093 doi (NATIONALLICENCE)springer-10.1023/A:1002697221093 Estimation Of The Lagrangian Structure Function Constant C0 From Surface-Layer Wind Data [Elektronische Daten] [D. Anfossi, G. Degrazia, E. Ferrero, S.E. Gryning, M.G. Morselli, S. Castelli] Eulerian turbulence observations, madein the surface layer under unstable conditions (z/L > 0),by a sonic anemometer were used to estimatethe Lagrangian structure function constant O. Twomethods were considered. The first one makes use of arelationship, widely used in the Lagrangian stochasticdispersion models, relating O to the turbulent kineticenergy dissipation rate ε, wind velocity variance andLagrangian decorrelation time. The second one employsa novel equation, connecting O to the constant of thesecond-order Eulerian structure function. Beforeestimating O, the measurements were processed in orderto discard non-stationary cases at least to a firstapproximation and cases in which local isotropy couldnot be assumed. The dissipation ε was estimated eitherfrom the best fit of the energy spectrum in theinertial subrange or from the best fit of the third-orderlongitudinal Eulerian structure function. Thefirst method was preferred and applied to the subsequentpart of the analysis. Both methods predict thepartitioning of O in different spatial components as aconsequence of the directional dependence of theEulerian correlation functions due to the isotropy.The O values computed by both methods are presented anddiscussed. In conclusion, both methods providerealistic estimates of O that compare well withprevious estimations reported in the literature, evenif a preference is to be attributed to the second method. Kluwer Academic Publishers, 2000 Lagrangian and Eulerian statistics nationallicence Structure functions nationallicence Autocorrelation functions nationallicence Energy spectra nationallicence Surface layer nationallicence Anfossi D. CNR-Istituto di Cosmogeofisica, Torino, Italy aut Degrazia G. Universidade Federal de Santa Maria (RS), Brasil aut Ferrero E. Dip. Scienze Tecn. Avanz., Universita' Piemonte Orientale, Alessandria, Italy aut Gryning S.E. RISO National Laboratory, Roskilde, Denmark aut Morselli M.G. ENEL/SRI Area Ambiente, Milano, Italy aut Castelli S. CNR-Istituto di Cosmogeofisica, Torino, Italy aut Boundary-Layer Meteorology Kluwer Academic Publishers 95/2(2000-05-01), 249-270 0006-8314 95:2<249 2000 95 10546 https://doi.org/10.1023/A:1002697221093 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1002697221093 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Anfossi D. CNR-Istituto di Cosmogeofisica, Torino, Italy aut NATIONALLICENCE 700 1- Degrazia G. Universidade Federal de Santa Maria (RS), Brasil aut NATIONALLICENCE 700 1- Ferrero E. Dip. Scienze Tecn. Avanz., Universita' Piemonte Orientale, Alessandria, Italy aut NATIONALLICENCE 700 1- Gryning S.E. RISO National Laboratory, Roskilde, Denmark aut NATIONALLICENCE 700 1- Morselli M.G. ENEL/SRI Area Ambiente, Milano, Italy aut NATIONALLICENCE 700 1- Castelli S. CNR-Istituto di Cosmogeofisica, Torino, Italy aut NATIONALLICENCE 773 0- Boundary-Layer Meteorology Kluwer Academic Publishers 95/2(2000-05-01), 249-270 0006-8314 95:2<249 2000 95 10546 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer