Numerical archetypal parameterization for mesoscale convective systems

Vertical shear commonly organizes atmospheric convection into coherent multiscale structures. The associated countergradient vertical transport of horizontal momentum by organized convection can enhance the wind shear and transport kinetic energy upscale. However, organized convection and its upscale effects are not represented by traditional mass-flux-based parameterizations. The present paper sets the archetypal dynamical models, originally formulated by the second author, into a parameterization context by utilizing a nonhydrostatic anelastic model with segmentally constant approximation (NAM-SCA). Using a two-dimensional framework as a starting point, NAM-SCA spontaneously generates propagating tropical squall lines in a sheared environment. High numerical efficiency is achieved through a novel compression methodology. The numerically generated archetypes produce vertical profiles of convective momentum transport that are consistent with the analytic archetype.

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Author Yano, Jun-Ichi
Moncrieff, Mitchell
Publisher UCAR/NCAR - Library
Publication Date 2016-07-01T00:00:00
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Topic Category geoscientificInformation
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Metadata Date 2023-08-18T19:01:10.054163
Metadata Record Identifier edu.ucar.opensky::articles:18595
Metadata Language eng; USA
Suggested Citation Yano, Jun-Ichi, Moncrieff, Mitchell. (2016). Numerical archetypal parameterization for mesoscale convective systems. UCAR/NCAR - Library. http://n2t.net/ark:/85065/d7p270s0. Accessed 15 June 2025.

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