Multi-scale predictability of high-impact stratospheric clear air turbulence events for air force platforms

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Vertical nesting and adaptive vertical gridding in nested mesoscale Weather Research and Forecasting (WRF)/microscale codes are developed. The inner nest of WRF is coupled with a sequence of embedded microscale nests, both horizontally and vertically. The fully three-dimensional (3D), compressible Navier-Stokes equations are solved with a stretched, adaptive grid in the vertical, with grid spacing down to a few meters in thin Clear Air Turbulence (CAT) layers where strong turbulent mixing occurs. For nesting, both lateral and vertical boundary conditions are treated via relaxation zones where the velocity and temperature fields are relaxed to those obtained from the WRF inner nest. This methodology is applied to the analysis of field data from T-REX campaign of measurements. Real case simulations based on initial and boundary conditions from high resolution T799 L91 European Centre for Medium-Range Weather Forecasts (ECMWF) analysis data are conducted. The embedded microscale nests predict localized shear layers and diagnose stiff gradients of vertical velocity and potential temperature above the tropopause and in the lower stratosphere. Three-dimensional instability mechanisms and turbulent dynamics within these CAT layers are fully resolved.

Original languageEnglish (US)
Title of host publicationDepartment of Defense - Proceedings of the HPCMP Users Group Conference 2007; High Performance Computing Modernization Program
Subtitle of host publicationA Bridge to Future Defense, DoD HPCMP UGC
Pages57-63
Number of pages7
DOIs
StatePublished - Dec 1 2007
EventDepartment of Defense - HPCMP Users Group Conference 2007; High Performance Computing Modernization Program: A Bridge to Future Defense, DoD HPCMP UGC - Pittsburg, PA, United States
Duration: Jun 18 2007Jun 21 2007

Publication series

NameDepartment of Defense - Proceedings of the HPCMP Users Group Conference 2007; High Performance Computing Modernization Program: A Bridge to Future Defense, DoD HPCMP UGC

Other

OtherDepartment of Defense - HPCMP Users Group Conference 2007; High Performance Computing Modernization Program: A Bridge to Future Defense, DoD HPCMP UGC
CountryUnited States
CityPittsburg, PA
Period6/18/076/21/07

ASJC Scopus subject areas

  • Computer Science(all)
  • Software

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    Mahalov, A., Moustaoui, M., & Nichols, B. (2007). Multi-scale predictability of high-impact stratospheric clear air turbulence events for air force platforms. In Department of Defense - Proceedings of the HPCMP Users Group Conference 2007; High Performance Computing Modernization Program: A Bridge to Future Defense, DoD HPCMP UGC (pp. 57-63). [4437965] (Department of Defense - Proceedings of the HPCMP Users Group Conference 2007; High Performance Computing Modernization Program: A Bridge to Future Defense, DoD HPCMP UGC). https://doi.org/10.1109/HPCMP-UGC.2007.52