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RISOn the Relation between Gravity Waves and Wind Speed in the Lower Stratosphere over the Southern Ocean
Publisher: American Meteorological Society
Abstract: he relationship between gravity wave momentum fluxes and local wind speed is investigated for oceanic regions at high southern latitudes during austral spring. The motivation is to better describe the gravity wave field ...
Modification of the Gravity Wave Parameterization in the Whole Atmosphere Community Climate Model: Motivation and Results
Publisher: American Meteorological Society
Abstract: he current standard version of the Whole Atmosphere Community Climate Model (WACCM) simulates Southern Hemisphere winter and spring temperatures that are too cold compared with observations. This ?cold-pole bias? leads to ...
On the Gravity Wave Forcing during the Southern Stratospheric Final Warming in LMDZ
Publisher: American Meteorological Society
Abstract: he austral stratospheric final warming date is often predicted with substantial delay in several climate models. This systematic error is generally attributed to insufficient parameterized gravity wave (GW) drag in the ...
Isentropic Transport within the Antarctic Polar-Night Vortex: Rossby Wave Breaking Evidence and Lagrangian Structures
Publisher: American Meteorological Society
Abstract: he trajectories in the lower stratosphere of isopycnic balloons released from Antarctica by Vorcore and Concordiasi field campaigns during the southern springs of 2005 and 2010 showed events of latitudinal transport inside ...
Comparison of Gravity Waves in the Southern Hemisphere Derived from Balloon Observations and the ECMWF Analyses
Publisher: American Meteorological Society
Abstract: he increase of spatial resolution allows the ECMWF operational model to explicitly resolve a significant portion of the atmospheric gravity wave (GW) field, but the realism of the simulated GW field in the ECMWF analyses ...
Sensitivity of Sudden Stratospheric Warmings to Previous Stratospheric Conditions
Publisher: American Meteorological Society
Abstract: AbstractThe Whole Atmosphere Community Climate Model, version 4 (WACCM4), is used to investigate the influence of stratospheric conditions on the development of sudden stratospheric warmings (SSWs). To this end, targeted ...
Stochastic Parameterization: Toward a New View of Weather and Climate Models
Publisher: American Meteorological Society
Abstract: he last decade has seen the success of stochastic parameterizations in short-term, medium-range, and seasonal forecasts: operational weather centers now routinely use stochastic parameterization schemes to represent model ...