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RISA Climatological Spectral Study of the 500 mb Geopotential Height of the Northern Hemisphere
Publisher: American Meteorological Society
Abstract: A 10-year record of the 500 mb geopotential height for the Northern Hemisphere has been expanded into spherical harmonics and filtered in the time domain. Maps of the root-mean-square (rms) height have been constructed ...
On the Relationship between Tropical and North Pacific Sea Surface Temperature Variations
Publisher: American Meteorological Society
Abstract: Empirical orthogonal function analysis of winter sea surface temperature (SST) anomalies over the Pacific domain (60°N?20°S) reveals an El Niño-Southern Oscillation (ENSO) mode that is linked to the eastern North Pacific, ...
Surface Climate Variations over the North Atlantic Ocean during Winter: 1900–1989
Publisher: American Meteorological Society
Abstract: The low-frequency variability of the surface climate over the North Atlantic during winter is described, using 90 years of weather observations from the Comprehensive Ocean?Atmosphere Data Set. Results are based on empirical ...
Regional Characteristics of the Northern Hemisphere Wintertime Circulation: A Comparison of the Simulation of a GFDL General Circulation Model with Observations
Publisher: American Meteorological Society
Abstract: The hemispheric distributions of a selected set of temporal mean, variance and covariance statistics produced by a general circulation model developed at the Geophysical Fluid Dynamics Laboratory are compared with observations. ...
zonal Wavenumber Characteristics of Northern Hemisphere Transient Eddies
Publisher: American Meteorological Society
Abstract: Eleven winters and twelve summers of twice-daily National Meteorological Center (NMC) analyses of geopotential height and temperature at five levels for the extratropical Northern Hemisphere are partitioned into long-wave ...
The Climatology of Blocking Events in a Perpetual January Simulation of a Spectral General Circulation Model
Publisher: American Meteorological Society
Abstract: A variety of statistical comparisons is made between the fluctuations occurring in a 1200-day perpetual January simulation of a spectral general circulation model and those occurring in a 20-winter data set. Attention is ...
Relationship between Cyclone Tracks, Anticyclone Tracks and Baroclinic Waveguides
Publisher: American Meteorological Society
Abstract: This study presents observational results concerning the structure and evolution of high-frequency fluctuations with periods shorter than 6 days in the geopotential height field. The results are based on a statistical ...
Horizontal Structure of 500 mb Height Fluctuations with Long, Intermediate and Short Time Scales
Publisher: American Meteorological Society
Abstract: Maps of standard deviations and one-point correlation maps based on twice-daily data subjected to a variety of temporal filters are presented, in order to document the horizontal structure of 500 mb height fluctuations ...
A General Circulation Model Study of January Climate Anomaly Patterns Associated with Interannual Variation of Equatorial Pacific Sea Surface Temperatures
Publisher: American Meteorological Society
Abstract: A general circulation model has been run in the perpetual January mode to produce several long-term simulations, each distinguished by a different imposed equatorial Pacific sea surface temperature. From each of them ...