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RISClimates at the Last Glacial Maximum: Influence of Model Horizontal Resolution
Publisher: American Meteorological Society
Abstract: The climate at the last glacial maximum (LGM) has been simulated using the U.K. Universities Global Atmospheric Modeling Programme (UGAMP) general circulation model (GCM) truncated at total wavenumbers 21, 42, and 63 (T21, ...
Sensitivity Studies of Northern Hemisphere Glaciation Using an Atmospheric General Circulation Model
Publisher: American Meteorological Society
Abstract: The U.K. University Global Atmospheric Modeling Programme GCM is used to investigate whether the growth of Northern Hemisphere ice sheets could have been initiated by changes of orbital parameters and sea surface temperature. ...
Green Mountains and White Plains: The Effect of Northern Hemisphere Ice Sheets on the Global Energy Budget
Publisher: American Meteorological Society
Abstract: AbstractThe changes in the global energy budget in response to imposing an ice sheet?s topography, albedo, or topography and albedo combined are examined. The albedo of the ice sheet (here called a ?White Plain?) causes ...
Baroclinic Instability of the Zonally Averaged Flow with Boundary Layer Damping
Publisher: American Meteorological Society
Abstract: In this paper we show that the observed zonally averaged atmosphere is unstable to normal mode type perturbations even when the effects of surface friction as modeled by an Ekman layer or Rayleigh damping are included. ...
Linear Stationary Wave Simulations of the Time-Mean Climatological Flow
Publisher: American Meteorological Society
Abstract: A spectral, σ-coordinate model linearized about a zonal mean flow is used to investigate the maintenance of the December?February climatological stationary waves. The model is generally run with 15 levels in the vertical ...
On the Existence of Storm-Tracks
Publisher: American Meteorological Society
Abstract: Given that middle latitude weather systems transport heat in a manner such as to weaken the baroclinicity that is thought to be crucial to their growth, it is perhaps surprising that concentrated regions of such eddy ...
Nonlinear Orographically Forced Planetary Waves
Publisher: American Meteorological Society
Abstract: Traditionally, stationary wave models have been linearized about a zonal-mean flow and the response calculated to various fixed orographic and thermal forcings. In this paper it is shown that the inclusion of nonlinear ...
A GCM Simulation of the Climate 6000 Years Ago
Publisher: American Meteorological Society
Abstract: Two 10-yr integrations of the UGAMP GCM are presented. Each has a full seasonal cycle, T42 resolution, interactive land and sea ice, and prescribed sea surface temperatures. They differ in that one integration represents ...
Patterns and Variations of Snow Accumulation over Greenland, 1979–98, from ECMWF Analyses, and Their Verification
Publisher: American Meteorological Society
Abstract: ECMWF monthly climate analyses were used to retrieve surface temperature, precipitation, evaporation/sublimation, and in conjunction with a simple meteorological model, snow accumulation over Greenland for 1979?98. The ...
Untitled
Publisher: American Meteorological Society
Abstract: AbstractThis study investigates the impact of CO2 on the amplitude, frequency, and mechanisms of Atlantic meridional overturning circulation (AMOC) variability in millennial simulations of the HadCM3 coupled climate model. ...