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RISApplication of Fast Fourier Transforms to the Direct Solution of a Class of Two-Dimensional Separable Elliptic Equations on the Sphere
Publisher: American Meteorological Society
Abstract: An efficient, direct, second-order solver for the discrete solution of a class of two-dimensional separable elliptic equations on the sphere (which generally arise in implicit and semi-implicit atmospheric models) is ...
Persistent North Pacific Circulation Anomalies and the Tropical Intraseasonal Oscillation
Publisher: American Meteorological Society
Abstract: A composite analysis of multiyear (1985?93) global reanalyses produced by the NCEP/NCAR and the NASA/DAO is used to show that the development of persistent North Pacific (PNP) circulation anomalies during NH winter is ...
The Pacific–South American Modes and Tropical Convection during the Southern Hemisphere Winter
Publisher: American Meteorological Society
Abstract: Atmospheric circulation features and convection patterns associated with two leading low-frequency modes in the Southern Hemisphere (SH) are examined in multiyear global reanalyses produced by NCEP?NCAR and NASA?DAO. The ...
Large-Scale Atmospheric Moisture Transport as Evaluated in the NCEP/NCAR and the NASA/DAO Reanalyses
Publisher: American Meteorological Society
Abstract: Large-scale aspects of the atmospheric moisture transport and the overall moisture budget we studied using data from the National Centers for Environmental Prediction (NCEP) reanalysis. Our objective is to critically ...
Characteristics of Landfalling Tropical Cyclones in the United States and Mexico: Climatology and Interannual Variability
Publisher: American Meteorological Society
Abstract: The climatology and interannual variability of landfalling tropical cyclones and their impacts on precipitation in the continental United States and Mexico are examined. The analysis is based on National Hurricane Center ...
Transitions from Hadley to Rossby Flows in Internally Forced Rotating Spherical Systems
Publisher: American Meteorological Society
Abstract: The possibility of global-scale transitions between atmospheric Hadley and Rossby regimes is investigated with a highly idealized, nonlinear, vertically continuous, rotating, spherical system. Low-order spectral versions ...
Tropical Influences on California Precipitation
Publisher: American Meteorological Society
Abstract: Atmospheric circulation anomalies and hydrologic processes associated with California wet and dry events were examined during Northern Hemisphere winter. The precipitation anomaly over the west coast of North America shows ...
Understanding the Characteristics of Daily Precipitation over the United States Using the North American Regional Reanalysis
Publisher: American Meteorological Society
Abstract: This study examines the seasonal characteristics of daily precipitation over the United States using the North American Regional Reanalysis (NARR). To help understand the physical mechanisms that contribute to changes in ...
Daily Precipitation Statistics for South America: An Intercomparison between NCEP Reanalyses and Observations
Publisher: American Meteorological Society
Abstract: In this study, the authors document the extent to which the precipitation statistics of the new CFS reanalysis (CFSR) represent an improvement over the earlier reanalyses: the NCEP?NCAR reanalysis (R1) and the NCEP?DOE ...
Modulation of Cold-Season U.S. Daily Precipitation by the Madden–Julian Oscillation
Publisher: American Meteorological Society
Abstract: his study examines the characteristics of cold-season (November?March) daily precipitation over the contiguous United States during active periods of the Madden?Julian oscillation (MJO). A large response in the precipitation ...