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RISThe Effect of Horizontal Pressure Gradients on the Momentum Transport in Tropical Convective Lines. Part II: Lagrangian Calculations
Publisher: American Meteorological Society
Abstract: The movement of a set of Lagrangian parcels in the two-dimensional pressure field associated with a tropical convective line is considered. The results are compared with observational characteristics of GATE quasi-two-dimensional ...
The Effect of Horizontal Pressure Gradients on the Momentum Transport in Tropical Convective Lines. Part I: The Results of the Convective Parameterization
Publisher: American Meteorological Society
Abstract: Measuremenits of the momentum transport in tropical convective lines suggest that horizontal momentum can be generated by the pressure low located near the center of the convective part of the line. A simple convective ...
Interaction between the MJO and Polar Circulations
Publisher: American Meteorological Society
Abstract: tropical?polar connection and its seasonal dependence are examined using the real-time multivariate Madden?Julian oscillation (MJO) (RMM) index and daily indices for the annular modes, the Arctic Oscillation (AO) and the ...
Hindcasting the January 2009 Arctic Sudden Stratospheric Warming and Its Influence on the Arctic Oscillation with Unified Parameterization of Orographic Drag in NOGAPS. Part I: Extended-Range Stand-Alone Forecast
Publisher: American Meteorological Society
Abstract: A very strong Arctic major sudden stratospheric warming (SSW) event occurred in late January 2009. The stratospheric temperature climbed abruptly and the zonal winds reversed direction, completely splitting the polar ...
The Role of Outflow-Layer Instabilities in Tropical Cyclone Motion
Publisher: American Meteorological Society
Abstract: The paper examines the role of the development of outflow-layer instabilities on the motion of tropical cyclones. The influence of barotropic instability is examined by comparing the time changes in the storm tracks with ...
Interannual Variability in the Gulf of Alaska during the 1991–94 El Niño
Publisher: American Meteorological Society
Abstract: Mass and heat budgets in the Gulf of Alaska during the 1991?94 El Niño are examined using hydrographic data from several cruises undertaken as part of the International North Pacific Ocean Climate program and the repeated ...
The Role of Baroclinic Processes in Tropical Cyclone Motion: The influence of Vertical Tilt
Publisher: American Meteorological Society
Abstract: The numerical study presented here focuses on baroclinic processes that contribute to tropical cyclone (TC) propagation. A three-dimensional, semispectral, primitive equation model of baroclinic vortex was developed to ...
The Feedback between Equatorial Convection and Local Radiative and Evaporative Processes: The Implications for Intraseasonal Oscillations
Publisher: American Meteorological Society
Abstract: Existing theories of the Madden?Julian oscillation neglect the feedback between the modification of sea surface temperature by the convection and development of a convective cluster itself. The authors show that the ...
The North Atlantic Oscillation, Surface Current Velocities, and SST Changes in the Subpolar North Atlantic
Publisher: American Meteorological Society
Abstract: Changes in surface circulation in the subpolar North Atlantic are documented for the recent interannual switch in the North Atlantic Oscillation (NAO) index from positive values in the early 1990s to negative values in ...
Surface Wind and Upper-Ocean Variability Associated with the Madden–Julian Oscillation Simulated by the Coupled Ocean–Atmosphere Mesoscale Prediction System (COAMPS)
Publisher: American Meteorological Society
Abstract: imulation of surface wind and upper-ocean variability associated with the Madden?Julian oscillation (MJO) by a regional coupled model, the Coupled Ocean?Atmosphere Mesoscale Prediction System (COAMPS), is evaluated by the ...