Meso-scale eddies affect near-surface turbulent exchange: evidence from lidar and tower measurements
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| Title: | Main Title: Meso-scale eddies affect near-surface turbulent exchange: evidence from lidar and tower measurements |
| Description: | 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
| Creators: | Fabian Eder (Author), Marius Schmidt (Author), Damian Thomas (Author), Katja Träumner (Author) |
| Publisher: | Journal of Applied Meteorology and Climatology |
| Publication Year: | 2014 |
Topic
| TR32 Topic: | Atmosphere |
| Related Subproject: | Z3 |
| Subjects: | Keywords: Energy Balance Closure, Eddy Covariance, Microwave Radiometer, LIDAR |
File Details
| Filename: | Eder_et_al_manuscript.docx |
| Data Type: | Text - Article |
| Size: | 54 Pages |
| File Size: | 2.5 MB |
| Date: | Updated: 12.09.2014 |
| Mime Type: | application/vnd.openxmlformats-officedocument.wordprocessingml.document |
| Data Format: | |
| Language: | English |
| Status: | In Process |
Constraints
| Download Permission: | Only Project Members |
| General Access and Use Conditions: | For internal use only |
| Access Limitations: | For internal use only |
| Licence: | [TR32DB] Data policy agreement |
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Specific Information - Publication
| Publication Status: | Submitted |
| Review Status: | Peer reviewed |
| Publication Type: | Article |
| Article Type: | Journal |
| Source: | Journal of Applied Meteorology and Climatology |
| Volume: | (submitted manuscript) |
| Number of Pages: | 54 (1 - 54) |
Metadata Details
| Metadata Creator: | Marius Schmidt |
| Metadata Created: | 18.09.2014 |
| Metadata Last Updated: | 18.09.2014 |
| Subproject: | Z3 |
| Funding Phase: | 2 |
| Metadata Language: | English |
| Metadata Version: | V50 |
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| Page Visits: | 936 |
| Metadata Downloads: | 0 |
| Dataset Downloads: | 2 |
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