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RISThe Simulation of Peak and Delayed ENSO Teleconnections
Publisher: American Meteorological Society
Abstract: There is much evidence that El Niño and La Niña lead to significant atmospheric seasonal predictability across much of the globe. However, despite successful predictions of tropical Pacific SSTs, atmospheric seasonal ...
Simulation of the Madden–Julian Oscillation in a Coupled General Circulation Model. Part I: Comparison with Observations and an Atmosphere-Only GCM
Publisher: American Meteorological Society
Abstract: The simulation of the Madden?Julian oscillation (MJO) has become something of a benchmark test for the performance of GCMs in the Tropics over recent years. Many atmospheric GCMs have been shown to reproduce some aspects ...
El Niño in a Coupled Climate Model: Sensitivity to Changes in Mean State Induced by Heat Flux and Wind Stress Corrections
Publisher: American Meteorological Society
Abstract: Here the factors affecting the mean state and El Niño variability in the Third Hadley Centre Coupled Ocean?Atmosphere General Circulation Model (HadCM3) are examined with and without heat flux or wind stress corrections. ...
Weak Land–Atmosphere Coupling Strength in HadAM3: The Role of Soil Moisture Variability
Publisher: American Meteorological Society
Abstract: A recent model intercomparison, the Global Land?Atmosphere Coupling Experiment (GLACE), showed that there is a wide range of land?atmosphere coupling strengths, or the degree that soil moisture affects the generation of ...
Equatorial Waves in Opposite QBO Phases
Publisher: American Meteorological Society
Abstract: methodology for identifying equatorial waves is used to analyze the multilevel 40-yr ECMWF Re-Analysis (ERA-40) data for two different years (1992 and 1993) to investigate the behavior of the equatorial waves under opposite ...
Simulation of the Madden–Julian Oscillation in a Coupled General Circulation Model. Part II: The Role of the Basic State
Publisher: American Meteorological Society
Abstract: In Part I of this study it was shown that air?sea coupling had a positive impact on some aspects of the simulation of the Madden?Julian oscillation (MJO) by a GCM. However, errors in the basic-state climate of that GCM ...
Predictability Experiments for the Asian Summer Monsoon: Impact of SST Anomalies on Interannual and Intraseasonal Variability
Publisher: American Meteorological Society
Abstract: The effects of SST anomalies on the interannual and intraseasonal variability of the Asian summer monsoon have been studied by multivariate statistical analyses of 850-hPa wind and rainfall fields simulated in a set of ...
The Importance of High-Frequency Sea Surface Temperature Variability to the Intraseasonal Oscillation of Indian Monsoon Rainfall
Publisher: American Meteorological Society
Abstract: While the Indian monsoon exhibits substantial variability on interannual time scales, its intraseasonal variability (ISV) is of greater magnitude and hence of critical importance for monsoon predictability. This ISV comprises ...
The Intraseasonal Variability of the Indian Summer Monsoon Using TMI Sea Surface Temperatures and ECMWF Reanalysis
Publisher: American Meteorological Society
Abstract: The northward-propagating intraseasonal (30?40 day) oscillation (NPISO) between active and break monsoon phases exerts a critical control on summer-season rainfall totals over India. Advances in diagnosing these events and ...
Prediction of the 1979 Summer Monsoon Onset with Modified Parameterization Schemes
Publisher: American Meteorological Society
Abstract: This paper describes the impact on the tropical simulation in the ECMWF model of various changes to the treatment of physical processes, with particular emphasis on the onset of the Asian summer monsoon. A series of 10-day ...