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RISLow-Frequency Synoptic-Eddy Activity in the Pacific Storm Track
Publisher: American Meteorological Society
Abstract: The nature of low-frequency variations in synoptic-eddy activity over the North Pacific is examined in a general circulation model (GCM). A comparison with observations reveals that the GCM produces realistic time mean and ...
Simulated Life Cycles of Persistent Anticyclonic Anomalies over the North Pacific: Role of Synoptic-Scale Eddies
Publisher: American Meteorological Society
Abstract: This study examines the role of synoptic-scale eddies during the development of persistent anticyclonic height anomalies over the central North Pacific in a general circulation model under perpetual January conditions. The ...
Simulations of Persistent North Pacific Circulation Anomalies and Interhemispheric Teleconnections
Publisher: American Meteorological Society
Abstract: Evidence is presented from a composite analysis of a 14-year general circulation model simulation, that persistent North Pacific (PNP) circulation anomalies during boreal winter are part of a larger-scale meridional ...
Analyzing the Concurrence of Meteorological Droughts and Warm Periods, with Implications for the Determination of Evaporative Regime
Publisher: American Meteorological Society
Abstract: The hydroclimatic conditions under which a seasonal meteorological drought (below-normal seasonal rainfall) can induce an increase in seasonal air temperature are investigated, first with an atmospheric general circulation ...
The Moisture Budget of the Central United States in Spring as Evaluated in the NCEP/NCAR and the NASA/DAO Reanalyses
Publisher: American Meteorological Society
Abstract: The moisture budget of the central United States during May is examined using multiyear (1985?89) assimilated datasets recently produced by NASA/DAO and NCEP/NCAR. Intercomparisons and comparisons with station observations ...
Causes and Predictability of the 2012 Great Plains Drought
Publisher: American Meteorological Society
Abstract: reat Plains precipitation deficits during May?August 2012 were the most severe since at least 1895, eclipsing the Dust Bowl summers of 1934 and 1936. Drought developed suddenly in May, following near-normal precipitation ...
Evolution of Large-Scale Circulation during TOGA COARE: Model Intercomparison and Basic Features
Publisher: American Meteorological Society
Abstract: An intercomparison study of the evolution of large-scale circulation features during TOGA COARE has been carried out using data from three 4D assimilation systems: the National Meteorological Center (NMC, currently known ...
Flash Drought as Captured by Reanalysis Data: Disentangling the Contributions of Precipitation Deficit and Excess Evapotranspiration
Publisher: American Meteorological Society
Abstract: AbstractFlash droughts?uncharacteristically rapid dryings of the land system?are naturally associated with extreme precipitation deficits. Such precipitation deficits, however, do not tell the whole story, for land surface ...
Tendency Bias Correction in Coupled and Uncoupled Global Climate Models with a Focus on Impacts over North America
Publisher: American Meteorological Society
Abstract: We revisit the bias correction problem in current climate models, taking advantage of state-of-the-art atmospheric reanalysis data and new data assimilation tools that simplify the estimation of short-term (6 hourly) ...
A Pilot Climate Sensitivity Study Using the CEN Coupled Adjoint Model (CESAM)
Publisher: American Meteorological Society
Abstract: AbstractA pilot coupled climate sensitivity study is presented based on the newly developed adjoint coupled climate model, Centrum für Erdsystemforschung und Nachhaltigkeit (CEN) Earth System Assimilation Model (CESAM). ...