| タイトル | Atmospheric Turbulence Estimates from a Pulsed Lidar |
| 本文（外部サイト） | http://hdl.handle.net/2060/20130003224 |
| 著者（英） | Ahmad, Nash'at N.; Proctor, Fred H.; Pruis, Matthew J.; Delisi, Donald P. |
| 著者所属（英） | NASA Langley Research Center |
| 発行日 | 2013-01-07 |
| 言語 | eng |
| 内容記述 | Estimates of the eddy dissipation rate (EDR) were obtained from measurements made by a coherent pulsed lidar and compared with estimates from mesoscale model simulations and measurements from an in situ sonic anemometer at the Denver International Airport and with EDR estimates from the last observation time of the trailing vortex pair. The estimates of EDR from the lidar were obtained using two different methodologies. The two methodologies show consistent estimates of the vertical profiles. Comparison of EDR derived from the Weather Research and Forecast (WRF) mesoscale model with the in situ lidar estimates show good agreement during the daytime convective boundary layer, but the WRF simulations tend to overestimate EDR during the nighttime. The EDR estimates from a sonic anemometer located at 7.3 meters above ground level are approximately one order of magnitude greater than both the WRF and lidar estimates - which are from greater heights - during the daytime convective boundary layer and substantially greater during the nighttime stable boundary layer. The consistency of the EDR estimates from different methods suggests a reasonable ability to predict the temporal evolution of a spatially averaged vertical profile of EDR in an airport terminal area using a mesoscale model during the daytime convective boundary layer. In the stable nighttime boundary layer, there may be added value to EDR estimates provided by in situ lidar measurements. |
| NASA分類 | Air Transportation and Safety |
| レポートNO | AIAA Paper 2013-0512
NF1676L-14858 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
