Accession Number:

ADA574462

Title:

Super-Parameterization of Boundary Layer Roll Vortices in Tropical Cyclone Models

Descriptive Note:

Annual rept.

Corporate Author:

RHODE ISLAND UNIV NARRAGANSETT GRADUATE SCHOOL OF OCEANOGRAPHY

Personal Author(s):

Report Date:

2012-09-30

Pagination or Media Count:

6.0

Abstract:

Our approach to parameterization of roll vortices in a TC model resembles the superparameterization approach used to simulate cloud physics processes in general circulation models Grabowski 2001. This methodology includes embedding a roll vortex resolving high-resolution 2-D LES model into the 3-D equation system representing a TC model. The decomposition of a 3-D equation system into two coupled equation systems for the mean flow and convective scale motions roll vortices is described in detail by Ginis et al. 2004 for an idealized 2-D mean flow. In this project, we extended this procedure for a general case of a 3-D TC model. The two models are coupled and explicitly solve the two-way interaction between the large-scale flow and roll vortices. The approach is schematically illustrated in Fig. 1. The 2-D LES model numerical meshes are oriented perpendicular to the direction of the mean wind flow generated by the TC model within the lowest 3 km thickness layer. The exact location of the convective meshes are determined experimentally

Subject Categories:

  • Meteorology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE