caa a22 4500 475777654 CHVBK 20180406123635.0 cr unu---uuuuu 170329e20000601xx s 000 0 eng 10.1023/A:1002649322001 doi (NATIONALLICENCE)springer-10.1023/A:1002649322001 Simulated Airborne Flux Measurements in a LES generated Convective Boundary Layer [Elektronische Daten] [M. Schröter, J. Bange, S. Raasch] One aim of past boundary-layer experiments with aircraft was the determination of areally averaged heat fluxes. In spite ofsophisticated instrumentation the measured fluxes extrapolated to the ground differed significantly from fluxes measured directly at ground stations. This studypresents simulated sensible heat flux measurements with aircraft flightsthrough a synthetic convective boundary layer created by a401 × 401 × 42 cubic-grid large eddy simulation (LES) with agrid spacing of 50 m. After some considerations with respect to necessary measurement lengths using results ofLenschow and Stankov (1986 - J. Atmos. Sci. 43, 1198-1209), simulated measurementcampaigns were carried out in three modelruns. During each model run five sets ofmeasurement runs were carried out successively.During each set of runs 10 aircraftflew at 10 altitudes with a ground speedof 100 m s-1 simultaneously throughtime and space. In total, 150 legs were carried out, 15 at each flight level. The resulting'smeasured' heat fluxes were compared withthose of the 'strue' flux profiles obtaineddirectly from the ensemble-averagedLES-generated data. No significant systematic error between 'smeasured' and 'strue' profiles was observed. Furthermore, the comparison of the resulting relative error with the theory ofLenschow and Stankov showed a good agreement at allmeasurement levels. Kluwer Academic Publishers, 2000 Large-eddy simulation nationallicence Convective boundary layer nationallicence Spectra nationallicence Averaging Length nationallicence Airborne Flux Measurements nationallicence Schröter M. Institute for Meteorology and Climatology, University of Hannover, Germany aut Bange J. Institute for Meteorology and Climatology, University of Hannover, Germany aut Raasch S. Institute for Meteorology and Climatology, University of Hannover, Germany aut Boundary-Layer Meteorology Kluwer Academic Publishers 95/3(2000-06-01), 437-456 0006-8314 95:3<437 2000 95 10546 https://doi.org/10.1023/A:1002649322001 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1002649322001 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Schröter M. Institute for Meteorology and Climatology, University of Hannover, Germany aut NATIONALLICENCE 700 1- Bange J. Institute for Meteorology and Climatology, University of Hannover, Germany aut NATIONALLICENCE 700 1- Raasch S. Institute for Meteorology and Climatology, University of Hannover, Germany aut NATIONALLICENCE 773 0- Boundary-Layer Meteorology Kluwer Academic Publishers 95/3(2000-06-01), 437-456 0006-8314 95:3<437 2000 95 10546 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer