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RISSome Destabilizing Properties of the Asselin Time Filter
Publisher: American Meteorological Society
Abstract: Stability of numerical solutions in the presence of the Asselin time filter is studied with the spectral one-dimensional linearized shallow-water wave equations. Emphasis is placed on solutions close to the stability limit. ...
On the Source of Midlatitude Low-Frequency Variability. Part I: A Statistical Approach to Persistence
Publisher: American Meteorological Society
Abstract: The forcing of low-frequency variability by synoptic transient traveling perturbations is investigated within a quasi-geostrophic channel forced by a localized baroclinic jet. Spontaneously generated baroclinic perturbations ...
A Flexible Bandpass Filter Design Procedure Applied to Midlatitude Intraseasonal Variability
Publisher: American Meteorological Society
Abstract: A general digital bandpass filtering procedure is presented whose advantages over other simple filtering methods are 1) versatility in its design, because only a set of three parameters is needed to calculate the filter ...
Forecasting West African Heat Waves at Subseasonal and Seasonal Time Scales
Publisher: American Meteorological Society
Abstract: AbstractEarly indication of an increased risk of extremely warm conditions could help alleviate some of the consequences of severe heat waves on human health. This study focuses on boreal spring heat wave events over West ...
On the Link between Summer Dry Bias over the U.S. Great Plains and Seasonal Temperature Prediction Skill in a Dynamical Forecast System
Publisher: American Meteorological Society
Abstract: AbstractSoil moisture anomalies are expected to be a driver of summer predictability for the U.S. Great Plains since this region is prone to intense and year-to-year varying water and energy exchange between the land and ...
Seasonal Forecasts of the Pan-Arctic Sea Ice Extent Using a GCM-Based Seasonal Prediction System
Publisher: American Meteorological Society
Abstract: n ocean?sea ice model reconstruction spanning the period 1990?2009 is used to initialize ensemble seasonal forecasts with the Centre National de Recherches Météorologiques Coupled Global Climate Model version 5.1 (CNRM-CM5.1) ...
Simulation of Late-Twenty-First-Century Changes in Wintertime Atmospheric Circulation over Europe Due to Anthropogenic Causes
Publisher: American Meteorological Society
Abstract: Evidence is presented, based on an ensemble of climate change scenarios performed with a global general circulation model of the atmosphere with high horizontal resolution over Europe, to suggest that the end-of-century ...
Evaluation of Probabilistic Quality and Value of the ENSEMBLES Multimodel Seasonal Forecasts: Comparison with DEMETER
Publisher: American Meteorological Society
Abstract: The performance of the new multimodel seasonal prediction system developed in the framework of the European Commission FP7 project called ENSEMBLE-based predictions of climate changes and their impacts (ENSEMBLES) is ...
Precipitation Climatology in an Ensemble of CORDEX-Africa Regional Climate Simulations
Publisher: American Meteorological Society
Abstract: n ensemble of regional climate simulations is analyzed to evaluate the ability of 10 regional climate models (RCMs) and their ensemble average to simulate precipitation over Africa. All RCMs use a similar domain and spatial ...
The Climate-System Historical Forecast Project: Providing Open Access to Seasonal Forecast Ensembles from Centers around the Globe
Publisher: American Meteorological Society