Coherent structures under different stratification stability conditions in the atmospheric surface layer

Abstract

© 2018 Australasian Fluid Mechanics Society. All rights reserved. A field experiment was carried out on a dry flat bed of Qingtu Lake in Minqin, China to measure the velocity and temperature in the atmospheric surface layer (ASL) at high Reynolds number (Reτ∼O(106)). The facility, the Qingtu Lake Observation Array (QLOA), permits synchronous multi-point measurements of three-dimensional wind velocity and temperature at different wall-normal and spanwise positions. Data were collected continuously during two three-month periods (March to May) over two years (2014 and 2015), from which 89 hours of high quality data were selected to analyse the characteristics of the large-scale coherent struct..