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RISScale-Dependent Properties of Optimal Perturbations on a Zonally Varying Barotropic Flow
Publisher: American Meteorological Society
Abstract: The scale-dependent characteristics of the optimal perturbations in a zonally asymmetric barotropic model are examined. The dependence of the optimal energy growth on the initial scale is investigated through the calculations ...
A Comparison of Decadal-to-Interdecadal Variability and Trend in Reanalysis Datasets Using Atmospheric Angular Momentum
Publisher: American Meteorological Society
Abstract: n intercomparison of the global relative angular momentum MR in five reanalysis datasets, including the Twentieth Century Reanalysis (20CR), is performed for the second half of the twentieth century. The intercomparison ...
Centennial Trend and Decadal-to-Interdecadal Variability of Atmospheric Angular Momentum in CMIP3 and CMIP5 Simulations
Publisher: American Meteorological Society
Abstract: he climatology and trend of atmospheric angular momentum from the phase 3 and the phase 5 Climate Model Intercomparison Project (CMIP3 and CMIP5, respectively) simulations are diagnosed and validated with the Twentieth ...
Barotropic Model Simulations of the North Pacific Retrograde Disturbances
Publisher: American Meteorological Society
Abstract: Branstator?Kushnir-type large-scale westward propagating waves are investigated using linear and nonlinear global barotropic models with an idealized zonally asymmetric basic state. Retrograde waves are found in the most ...
Two-Dimensional Turbulence and Persistent Zonal Jets in a Global Barotropic Model
Publisher: American Meteorological Society
Abstract: The dynamics of two-dimensional turbulence on a rotating sphere are examined. The anisotropic Rhines scale is derived and verified in decaying turbulence simulations. Due to the anisotropic nature of the Rossby waves, the ...
Application of AVHRR Data to a One-Dimensional Variational Retrieval Scheme for Cloudy TOVS Data
Publisher: American Meteorological Society
Abstract: The use of the Advanced Very High Resolution Radiometer (AVHRR) data in a one-dimensional variational scheme is examined to retrieve cloud parameters and atmospheric profiles. The variational scheme used TIROS Operational ...
A Comparative Study of Precipitation and Evaporation between CMIP3 and CMIP5 Climate Model Ensembles in Semiarid Regions
Publisher: American Meteorological Society
Abstract: he twentieth-century climatology and twenty-first-century trend in precipitation P, evaporation E, and P ? E for selected semiarid U.S. Southwest and Mediterranean regions are compared between ensembles from phases 3 and ...
On the Computation of the Mountain Torque from Gridded Global Datasets
Publisher: American Meteorological Society
Abstract: This note evaluates the numerical schemes used for computing the axial component of the mountain torque from gridded global surface pressure and topography datasets. It is shown that the two formulas of the mountain torque ...
Another Look at the Annual and Semiannual Cycles of AtmosphericAngular Momentum
Publisher: American Meteorological Society
Abstract: The annual variation of global atmospheric angular momentum (AAM) is dominated by its first and second harmonic components. The first harmonic is associated with maximum global AAM in winter (December? January?February) ...
Hindcasts of Tropical Atlantic SST Gradient and South American Precipitation: The Influences of the ENSO Forcing and the Atlantic Preconditioning
Publisher: American Meteorological Society
Abstract: Hindcast experiments for the tropical Atlantic sea surface temperature (SST) gradient G1, defined as tropical North Atlantic SST anomaly minus tropical South Atlantic SST anomaly, are performed using an atmospheric general ...