Multifractal analysis of C²_n scintillometer data collected over a large green roof

This study investigates the variability of (Formula presented.) data across different spatial and temporal scales using data from a large-aperture scintillometer (LAS) installed on a 1 ha green roof, known as the Blue Green Wave, in Ecole nationale des ponts chaussées, near Paris. Data collected at 10-min intervals during December 2019 and January 2020 were analysed using structure function and universal multifractal (UM) models. The analysis revealed strong scaling behaviour from 10 min to 2 h, with UM parameters estimated as (Formula presented.) for the mean intermittency codimension, (Formula presented.) for the multifractality index and approximately 0.44 for the non-conservative parameter (Formula presented.), which deviates from classical turbulence theories. Our results provide a deeper understanding of the variability in (Formula presented.) and offer insights into scaling properties relevant to turbulence studies in urban green roof environments.