Investigation of organized large eddies and associated turbulence transport channels: an airborne Doppler wind lidar perspective
Abstract
Funds are provided to further investigate the existence and structure of the previously identified boundary layer features such as Turbulence Transport Channels (TTC) and stacked Organized Large Eddies (OLEs) through the analysis of data gathered during new targeted Twin Otter Doppler Wind Lidar (TODWL) missions off the coast of Monterey, CA, as well as further analysis of existing TODWL data archives (mainly April and November 2007). The end goal of this research is the documentation and description of the TTC (and stacked OLEs) expressed in PDF (Probability Density Form). The Pi will demonstrate the importance that such structures could have as input and parameterizations into boundary layer and electro-magnetic propagation models and will share his findings with the relevant ONR-funded scientific community. Thisresearch plan is designed to answer the following questions: 1. What are the physical characteristics (intensity, horizontal and vertical extent, vertical motion, etc.) of vertical channels (slabs) of turbulence or TTC and stacked OLEs that are illuminated by an airborne DWL? 2. Is there an approximate and useful quantitative relationship between the broadening of the DWL spectral features and the conventional quantity of Total Kinetic Energy (TKE)? 3. What is the net transport of TKE in these features? 4. What are the implications to these transports in the presence of Marine Boundary Layer (MBL) jets? 5. Can the energetics and net transports of OLEs and the TTC be characterized in a manner suitable for parameterization within numerical and EM propagation models? 6. Does the OLE model lead to a better understanding of the highly non-linear interactions within OLE and TTC dominated MBLs?
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 04, 2017
- Source ID
- N000141713038
Entities
People
- George Emmitt
Organizations
- Office of Naval Research
- Simpson Weather Associates (United States)
- United States Navy