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RISMomentum Flux Spectrum of Convectively Forced Internal Gravity Waves and Its Application to Gravity Wave Drag Parameterization. Part I: Theory
Publisher: American Meteorological Society
Abstract: The phase-speed spectrum of momentum flux by convectively forced internal gravity waves is analytically formulated in two- and three-dimensional frameworks. For this, a three-layer atmosphere that has a constant vertical ...
A Lagrangian Spectral Parameterization of Gravity Wave Drag Induced by Cumulus Convection
Publisher: American Meteorological Society
Abstract: A Lagrangian spectral parameterization of gravity wave drag (GWD) induced by cumulus convection (GWDC) is developed based on ray theory and several assumptions and implemented into the NCAR Whole Atmosphere Community Climate ...
Characteristics and Momentum Flux Spectrum of Convectively Forced Internal Gravity Waves in Ensemble Numerical Simulations
Publisher: American Meteorological Society
Abstract: Characteristics of convectively forced gravity waves are investigated through ensemble numerical simulations for various ideal and real convective storms. For ideal storm cases, single-cell-, multicell-, and supercell-type ...
Momentum Flux Spectrum of Convectively Forced Gravity Waves: Can Diabatic Forcing Be a Proxy for Convective Forcing?
Publisher: American Meteorological Society
Abstract: The momentum flux of convectively forced internal gravity waves is calculated using explicitly resolved model-simulated gravity wave data. The momentum flux in a control simulation with nonlinearity and cloud microphysical ...
Role of Gravity Waves in a Vortex-Split Sudden Stratospheric Warming in January 2009
Publisher: American Meteorological Society
Abstract: The role of gravity waves (GWs) in a sudden stratospheric warming (SSW) event that occurred in January 2009 (SSW09) is investigated using the MERRA-2 dataset. Nearly 2 weeks prior to the central date (lag = 0), at which ...
Generation Mechanisms of Convectively Forced Internal Gravity Waves and Their Propagation to the Stratosphere
Publisher: American Meteorological Society
Abstract: Characteristics of gravity waves induced by mesoscale convective storms and the gravity wave sources are investigated using a two-dimensional cloud-resolving numerical model. In a nonlinear moist (control) simulation, the ...
Effects of Nonlinearity on Convectively Forced Internal Gravity Waves: Application to a Gravity Wave Drag Parameterization
Publisher: American Meteorological Society
Abstract: In the present study, the authors propose a way to include a nonlinear forcing effect on the momentum flux spectrum of convectively forced internal gravity waves using a nondimensional numerical model (NDM) in a two-dimensional ...
Momentum Flux Spectrum of Convectively Forced Internal Gravity Waves and Its Application to Gravity Wave Drag Parameterization. Part II: Impacts in a GCM (WACCM)
Publisher: American Meteorological Society
Abstract: Impacts of a spectral parameterization of gravity wave drag (GWD) induced by cumulus convection (GWDC) in the NCAR Whole Atmosphere Community Climate Model (WACCM1b) are investigated. In the spectral GWDC parameterization, ...
Latitudinal Variations of the Convective Source and Propagation Condition of Inertio-Gravity Waves in the Tropics
Publisher: American Meteorological Society
Abstract: Latitudinal variations of the convective source and vertical propagation condition of inertio-gravity waves (IGWs) in the tropical region (30°S?30°N) are examined using high-resolution Global Cloud Imagery (GCI) and 6-hourly ...
Impact of a Convectively Forced Gravity Wave Drag Parameterization in NCAR CCM3
Publisher: American Meteorological Society
Abstract: A parameterization of gravity wave drag forced by subgrid-scale cumulus convection (GWDC) proposed by Chun and Baik is implemented into the National Center for Atmospheric Research Community Climate Model (NCAR CCM3) and ...