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RISA New Set of Orthonormal Modes for Linearized Meteorological Problems
Publisher: American Meteorological Society
Abstract: A new orthogonal decomposition based on the Schmidt decomposition approach has been applied to the barotropic equation linearized around the January 300-mb climatological flow. The Schmidt decomposition can be computed ...
Pattern Analysis of SST-Forced Variability in Ensemble GCM Simulations: Examples over Europe and the Tropical Pacific
Publisher: American Meteorological Society
Abstract: An ensemble of atmospheric general circulation model (GCM) simulations with prescribed sea surface temperature (SST) generates a rich dataset. The main aim here is to advocate and demonstrate an approach to skill and ...
Tropical Intraseasonal Oscillation Appearing in Operational Analyses and in a Family of General Circulation Models
Publisher: American Meteorological Society
Abstract: The statistics of tropical intraseasonal variability are studied using European Centre for Medium-Range Weather Forecasts analyses and several ECHAM General Circulation Model experiments made with different model versions ...
Reduction of Model Systematic Error by Statistical Correction for Dynamical Seasonal Predictions
Publisher: American Meteorological Society
Abstract: Singular value decomposition analysis (SVDA) is used to analyze an ensemble of three 34-yr general circulation model (GCM) simulations forced with observed sea surface temperature. It is demonstrated how statistical ...
Estimation of Koopman Transfer Operators for the Equatorial Pacific SST
Publisher: American Meteorological Society
Baroclinic Stationary Waves in Aquaplanet Models
Publisher: American Meteorological Society
Abstract: n aquaplanet model is used to study the nature of the highly persistent low-frequency waves that have been observed in models forced by zonally symmetric boundary conditions.Using the Hayashi spectral analysis of the ...
Heavy Precipitation Events in a Warmer Climate: Results from CMIP5 Models
Publisher: American Meteorological Society
Abstract: n this work, the authors investigate possible changes in the distribution of heavy precipitation events under a warmer climate, using the results of a set of 20 climate models taking part in phase 5 of Coupled Model ...
South Asian Summer Monsoon and the Eastern Mediterranean Climate: The Monsoon–Desert Mechanism in CMIP5 Simulations
Publisher: American Meteorological Society
Abstract: ry summers over the eastern Mediterranean are characterized by strong descent anchored by long Rossby waves, which are forced by diabatic heating associated with summer monsoon rainfall over South Asia. The large-scale ...
Bidimensional Diagnostics, Variability, and Trends of Northern Hemisphere Blocking
Publisher: American Meteorological Society
Abstract: n this paper, Northern Hemisphere winter blocking is analyzed through the introduction of a set of new bidimensional diagnostics based on geopotential height that provide information about the occurrence, the duration, the ...
Mechanisms for ENSO Phase Change in a Coupled GCM
Publisher: American Meteorological Society
Abstract: The mechanisms leading to El Niño onset and termination in the ECHAM4/OPA coupled GCM are assessed and compared to observations and existing ENSO paradigms. At the equator as well as off equator, the patterns and timing ...