Investigation of the Representation of OLEs and Terrain Effects Within the Coastal Zone in the EDMF Parameterization Scheme: An Airborne Doppler Wind Lidar Perspective

During Year 1, the current Twin Otter Doppler Wind Lidar TODWL data archives were searched to identify cases with and without Organized Large Eddies OLEs. We have investigated in detail the TODWL derived wind patterns over and near the coastal zone on several of these days. These analyses, as well as a theoretical model for OLE dynamics developed by the investigators, are also being used to help evaluate numerical simulations utilizing the WRF model. WRF simulations for OLE and non- OLE days have been run using various options for BL parameterizations including an EDMF scheme. In the first year, we have also made progress in improving the retrieval of TODWL derived winds in the bottom 300 m of the atmosphere. We have developed a two-step approach which involves removing high intensity ground returns and identifying and tracking aerosol radial velocities in the layer affected by ground interference. Using this approach for measurements acquired over the Salinas Valley, we showed that additional range gates closer to the surface can be obtained. We have also collaborated with other participants on the design of the field campaign to be conducted in Year 2, including missions over Monterey Bay and for MATERHORN Dugway Proving Ground.