[1081] - Meso-scale eddies affect near-surface turbulent exchange: evidence from lidar and tower measurements

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Eder, F., Schmidt, M., Thomas, D., Träumner, K., 2014. Meso-scale eddies affect near-surface turbulent exchange: evidence from lidar and tower measurements. Journal of Applied Meteorology and Climatology, (submitted manuscript), 1 - 54.
Title(s):Main Title: Meso-scale eddies affect near-surface turbulent exchange: evidence from lidar and tower measurements
Description(s):Abstract: The eddy-covariance technique tends to underestimate the turbulent heat fluxes, which results in the non-closure of the surface energy balance. This study shows experimental evidence that meso-scale turbulent organized structures, which are inherently not captured by the standard eddy-covariance technique, can affect the near-surface turbulent exchange. Using a combined setup of three Doppler wind lidars above a cropland-dominated area in Germany, low-frequency turbulent structures were detected in the surface layer down to a few meters above ground. In addition, data from two micrometeorological stations in the study area were analyzed with respect to energy balance closure. In accordance with several previous studies, the data confirm a strong friction velocity dependence of the energy balance residual. At both stations, the energy balance residual was found to be positively correlated with the vertical moisture gradient in the lower atmospheric boundary layer, but at only one station with the temperature gradient. This indicates that meso-scale transport probably contributes more to the latent heat flux than to the sensible heat flux, but this depends largely on the measurement site. Moreover, flow distortion due to tower mountings and measurement devices affects the energy balance closure considerably for certain wind directions.
Responsible Party
Creator(s):Author: Fabian Eder
Author: Marius Schmidt
Author: Damian Thomas
Author: Katja Träumner
Publisher:Journal of Applied Meteorology and Climatology
TR32 Topic:Atmosphere
Subject(s):CRC/TR32 Keywords: Energy Balance Closure, EC, Microwave Radiometer, LIDAR
File Details
File Name:Eder_et_al_manuscript.docx
Data Type:Text
Size(s):54 Pages
File Size:2611 kB (2.55 MB)
Date(s):Modified: 2014-09-12
Mime Type:application/vnd.openxmlformats-officedocument.wordprocessingml.document
Data Format:PDF
Status:In Process
Download Permission:OnlyTR32
General Access and Use Conditions:For internal use only
Access Limitations:For internal use only
Licence:TR32DB Data policy agreement
Measurement Region:Ellebach
Measurement Location:Selhausen
Specific Informations - Publication
Article Type:Journal
Source:Journal of Applied Meteorology and Climatology
Volume:(submitted manuscript)
Page Range:1 - 54
Metadata Details
Metadata Creator:Marius Schmidt
Metadata Created:2014-09-18
Metadata Last Updated:2014-09-18
Funding Phase:2
Metadata Language:English
Metadata Version:V40
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