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RISEnhanced Seasonal Prediction of European Winter Warming following Volcanic Eruptions
Publisher: American Meteorological Society
Abstract: The impact of explosive volcanic eruptions on the atmospheric circulation at high northern latitudes is assessed in two versions of the Met Office Hadley Centre?s atmospheric climate model. The standard version of the model ...
Impact of a Spectral Gravity Wave Parameterization on the Stratosphere in the Met Office Unified Model
Publisher: American Meteorological Society
Abstract: The impact of a parameterized spectrum of gravity waves on the simulation of the stratosphere in the Met Office Unified Model (UM) is investigated. In the extratropical mesosphere, the gravity wave forcing acts against the ...
Cluster Analysis of North Atlantic–European Circulation Types and Links with Tropical Pacific Sea Surface Temperatures
Publisher: American Meteorological Society
Abstract: Observed atmospheric circulation over the North Atlantic?European (NAE) region is examined using cluster analysis. A clustering algorithm incorporating a ?simulated annealing? methodology is employed to improve on solutions ...
Stratospheric Communication of El Niño Teleconnections to European Winter
Publisher: American Meteorological Society
Abstract: The stratospheric role in the European winter surface climate response to El Niño?Southern Oscillation sea surface temperature forcing is investigated using an intermediate general circulation model with a well-resolved ...
Stratospheric Vacillations and the Major Warming over Antarctica in 2002
Publisher: American Meteorological Society
Abstract: The conditions that lead to the major warming over Antarctica in late September 2002 are examined. In many respects, the warming resembled wave-2 warmings seen in the Northern Hemisphere; the winter cyclonic circulation ...
Tropical Cumulus Convection and Upward-Propagating Waves in Middle-Atmospheric GCMs
Publisher: American Meteorological Society
Abstract: It is recognized that the resolved tropical wave spectrum can vary considerably among general circulation models (GCMs) and that these differences can have an important impact on the simulated climate. A comprehensive ...
The GloSea4 Ensemble Prediction System for Seasonal Forecasting
Publisher: American Meteorological Society
Abstract: easonal forecasting systems, and related systems for decadal prediction, are crucial in the development of adaptation strategies to climate change. However, despite important achievements in this area in the last 10 years, ...
The Physical Properties of the Atmosphere in the New Hadley Centre Global Environmental Model (HadGEM1). Part II: Aspects of Variability and Regional Climate
Publisher: American Meteorological Society
Abstract: The performance of the atmospheric component of the new Hadley Centre Global Environmental Model (HadGEM1) is assessed in terms of its ability to represent a selection of key aspects of variability in the Tropics and ...
The GCM–Reality Intercomparison Project for SPARC (GRIPS): Scientific Issues and Initial Results
Publisher: American Meteorological Society
Abstract: To investigate the effects of the middle atmosphere on climate, the World Climate Research Programme is supporting the project "Stratospheric Processes and their Role in Climate" (SPARC). A central theme of SPARC, to examine ...