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RISOn the Role of Planetary-Scale Waves in the Abrupt Seasonal Transition of the Northern Hemisphere General Circulation
Publisher: American Meteorological Society
Abstract: he role of planetary-scale waves in the abrupt seasonal transition of the Northern Hemisphere (NH) general circulation is studied. In reanalysis data, the winter-to-summer transition involves the growth of planetary-scale ...
The Impact of Stratospheric Model Configuration on Planetary-Scale Waves in Northern Hemisphere Winter
Publisher: American Meteorological Society
Abstract: The impact of stratospheric model configuration on modeled planetary-scale waves in Northern Hemisphere winter is examined using the Canadian Middle Atmosphere Model (CMAM). The CMAM configurations include a high-lid (0.001 ...
On the Control of the Residual Circulation and Stratospheric Temperatures in the Arctic by Planetary Wave Coupling
Publisher: American Meteorological Society
Abstract: t is well established that interannual variability of eddy (meridional) heat flux near the tropopause controls the variability of Arctic lower-stratospheric temperatures during spring via a modification of the strength of ...
The Life Cycle of Northern Hemisphere Downward Wave Coupling between the Stratosphere and Troposphere
Publisher: American Meteorological Society
Abstract: he life cycle of Northern Hemisphere downward wave coupling between the stratosphere and troposphere via wave reflection is analyzed. Downward wave coupling events are defined by extreme negative values of a wave coupling ...
Tropical and Subtropical Meridional Latent Heat Transports by Disturbances to the Zonal Mean and Their Role in the General Circulation
Publisher: American Meteorological Society
Abstract: he spectrum of meridional latent heat transport in the tropics and subtropics by disturbances to the zonal mean during all seasons is analyzed. The transport is divided into stationary and transient planetary- and ...
Comments on “A Spectral Parameterization of Drag, Eddy Diffusion, and Wave Heating for a Three-Dimensional Flow Induced by Breaking Gravity Waves”
Publisher: American Meteorological Society
Downward Wave Coupling between the Stratosphere and Troposphere: The Importance of Meridional Wave Guiding and Comparison with Zonal-Mean Coupling
Publisher: American Meteorological Society
Abstract: The nature of downward wave coupling between the stratosphere and troposphere in both hemispheres is analyzed using the 40-yr European Centre for Medium-Range Weather Forecasts (ECMWF) Re-Analysis (ERA-40) dataset. Downward ...
Angular Momentum Conservation and Gravity Wave Drag Parameterization: Implications for Climate Models
Publisher: American Meteorological Society
Abstract: The robustness of the parameterized gravity wave response to an imposed radiative perturbation in the middle atmosphere is examined. When momentum is conserved and for reasonable gravity wave drag parameters, the response ...
The Tropospheric Response to Tropical and Subtropical Zonally Asymmetric Torques: Analytical and Idealized Numerical Model Results
Publisher: American Meteorological Society
Abstract: he tropospheric response to prescribed tropical and subtropical zonally asymmetric torques, which can be considered as idealizations of vertical momentum transfers by orographic gravity waves or convection, is investigated. ...
A Theoretical Framework for Energy and Momentum Consistency in Subgrid-Scale Parameterization for Climate Models
Publisher: American Meteorological Society
Abstract: A theoretical framework for the joint conservation of energy and momentum in the parameterization of subgrid-scale processes in climate models is presented. The framework couples a hydrostatic resolved (planetary scale) ...