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RISRetrograding Wintertime Low-Frequency Disturbances over the North Pacific Ocean
Publisher: American Meteorological Society
Abstract: Retrograding (westward-moving) features over the middle and high latitudes of the Northern Hemisphere during winter are examined in observations and data from a GCM simulation, using complex principal component analysis. ...
Interdecadal Variations in North Atlantic Sea Surface Temperature and Associated Atmospheric Conditions
Publisher: American Meteorological Society
Abstract: Evidence is presented for a distinct Pattern Of ocean-atmosphere relationship associated with interdecadal variability in the North Atlantic region. Using a century of surface marine observations it is shown that middle- ...
On the Response of Superpressure Balloons to Displacements from Equilibrium Density Level
Publisher: American Meteorological Society
Abstract: An approximate analytical solution of the vertical equation of motion for constant density superpressure balloons is obtained. It is shown how this solution can be used to filter out neutrally buoyant oscillations in balloon ...
Interaction of Low- and High-Frequency Transients in a Forecast Experiment with a General Circulation Model
Publisher: American Meteorological Society
Abstract: Two sets of 15-day numerical forecasts are performed with a general circulation model to examine aspects of the mutual interaction between high-frequency, baroclinic-wave variability and the low-frequency components of the ...
Low-Frequency Variability in the Northern Hemisphere Winter: Geographical Distribution, Structure and Time-Scale Dependence
Publisher: American Meteorological Society
Abstract: Low-frequency variability in wintertime 500 mb height is examined, with emphasis on its structure, geographical distribution, and frequency dependence. A 39-year record of 500 mb geopotential height fields from the NMC ...
The General Circulation Model Response to a North Pacific SST Anomaly: Dependence on Time Scale and Pattern Polarity
Publisher: American Meteorological Society
Abstract: A general circulation model was integrated with perpetual January conditions and prescribed sea surface temperature (SST) anomalies in the North Pacific. A characteristic pattern with a warm region centered northeast of ...
Northern Hemisphere Wintertime Variability in a Two-Level General Circulation Model. Part II. The Maintenance of Short and Long Time-Scale Disturbances
Publisher: American Meteorological Society
Abstract: The energetics of large-scale disturbances of the wintertime, Northern Hemisphere circulation are studied with the OSU two-level general circulation model. The behavior of simulated eddies with short time-scale (2.5 to 10 ...
Northern Hemisphere Wintertime Variability in a Two-Level General Circulation Model. Part 1: Statistical Characteristics of Short and Long Time-Scale Disturbances
Publisher: American Meteorological Society
Abstract: The properties of atmospheric Northern Hemisphere wintertime variability, simulated by the Oregon State University two-level general circulation model are examined. Time series of the dependent variables and diabatic heating ...
Equilibrium Atmospheric Response to North Atlantic SST Anomalies
Publisher: American Meteorological Society
Abstract: The equilibrium general circulation model (GCM) response to sea surface temperature (SST) anomalies in the western North Atlantic region is studied. A coarse resolution GCM, with realistic lower boundary conditions including ...
Warming Trend of the Indian Ocean SST and Indian Ocean Dipole from 1880 to 2004
Publisher: American Meteorological Society
Abstract: The state of the Indian Ocean dipole representing the SST anomaly difference between the western and southeastern regions of the ocean is investigated using historical SST reconstructions from 1880 to 2004. First, the ...