58 Int. J. Environment and Pollution, Vol. 55, Nos. 1/2/3/4, 2014 Copyright © 2014 Inderscience Enterprises Ltd. Analytical offline approach for concentration fluctuations and higher order concentration moments Andrea Bisignano* Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel, 11, 15121 Alessandria, Italy E-mail: andrea.bisignano@mfn.unipmn.it *Corresponding author Luca Mortarini Institute of Atmospheric Sciences and Climate (ISAC), National Research Council (CNR), Corso Fiume 4, 10133, Torino, Italy E-mail: l.mortarini@isac.cnr.it Enrico Ferrero Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel, 11, 15121 Alessandria, Italy E-mail: enrico.ferrero@mfn.unipmn.it Stefano Alessandrini Research on Energy Systems (RSE), via Rubattino 54, Milano, Italy and University Corporation for Atmospheric Research (UCAR), 3090 Center Green Drive, Boulder, CO 80301, USA E-mail: Stefano.alessandrini@rse-web.it E-mail: alessand@ucar.edu Abstract: We developed a fluctuating plume model able to evaluate all the higher order moments of concentration only requiring the knowledge of the first one. The simple algorithm used to calculate the meander centroid component is independent of the method used to obtain the mean concentration field and makes the computational time lower than most meandering plume model versions. Thus, it is especially suitable for practical applications. Keywords: atmospheric dispersion; fluctuating plume model; concentration fluctuations; environmental pollution.