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Advancing Unified Parameterization Investigations with TODWL Data in Complex Terrain Dynamics

This document outlines the efforts to enhance the Eddy Diffusivity Mass Flux (EDMF) parameterization by integrating existing and novel data from the Navy Postgraduate School’s Twin Otter Doppler Wind Lidar (TODWL). Conducted during the WG meeting in Boulder, CO, from October 16-18, 2012, the goals include evaluating lower tropospheric dynamics in complex terrain, particularly involving Organized Large Eddies (OLEs) and Low-Level Jets (LLJs). The study aims to determine wind orientation relative to eddy formations and assess aerosol integration effects amidst chaotic velocity structures.

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Advancing Unified Parameterization Investigations with TODWL Data in Complex Terrain Dynamics

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  1. Using TODWL to support unified parameterization investigations D. Emmitt (SWA), R. Foster(UWash) and K. Godwin (LLC) 16 -18 October 2012 WG meeting in Boulder, CO

  2. Outline • Science Objectives • Strategy • Status of experiments (Marina and Dugway)

  3. Research goal Contribute to the evaluation and development of the Eddy Diffusivity Mass Flux (EDMF) parameterization by using both existing and new data from the Navy Postgraduate School’s Twin Otter Doppler Wind Lidar (TODWL) in an investigation of lower tropospheric dynamics within the interaction zone of complex terrain and the coastal waters, especially in the presence of Organized Large Eddies (OLEs)and Low Level Jets (LLJs).

  4. Additional goals • Determine the angle between the rolls and the mean wind. Which mean wind? • Investigate the apparent “integration” effects of the aerosols that persist without correlated velocity structures.

  5. TODWL

  6. CIRPAS Twin Otter with CTV below

  7. Pallet Wind Observing Lidar Facility (PWOLF) Picture of towed TODWL

  8. Coastal studies (land) • Ridge and valley circulations • Model validation • Nocturnal boundary layers • Low-level-jets (LLJ) • Organized Large Eddies

  9. April 13, 2007 flights with CTV

  10. SE

  11. NW

  12. Summary • One good Salinas Valley mission • One good off shore aerosol street case. • CTV flown at different levels in the MBL • Final processing data in progress.

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