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RISLocal Energetics of an Idealized Baroclinic Wave Using Extended Exergy
Publisher: American Meteorological Society
Abstract: The concept of local extended exergy is here applied to an idealized, dry, and reversible-adiabatic cyclone development. The extended exergy as well as the kinetic energy are decomposed into a mean part, defined by a zonal ...
North Atlantic SSTs as a Link between the Wintertime NAO and the Following Spring Climate
Publisher: American Meteorological Society
Abstract: n this paper a potential seasonally lagged impact of the wintertime North Atlantic Oscillation (NAO) on the subsequent spring climate over the European region is explored. Supported by the observational indication of the ...
Observed Low-Frequency Covariabilities between the Tropical Oceans and the North Atlantic Oscillation in the Twentieth Century
Publisher: American Meteorological Society
Abstract: The low-frequency covariabilities of tropical sea surface temperature (SST) and the North Atlantic Oscillation (NAO) during twentieth-century winters are investigated by maximum covariance analysis (MCA) using reanalysis ...
The Roles of External Forcings and Internal Variabilities in the Northern Hemisphere Atmospheric Circulation Change from the 1960s to the 1990s
Publisher: American Meteorological Society
Abstract: The Northern Hemisphere atmospheric circulation change from the 1960s to the 1990s shows a strong positive North Atlantic Oscillation (NAO) and a deepening of the Aleutian low. The issue regarding the contributions of ...
Relationships between Upper-Level Circulation over South America and Rainfall over Southeastern South America: A Physical Base for Seasonal Predictions
Publisher: American Meteorological Society
Abstract: The existence of a significant simultaneous correlation between bimonthly mean precipitation anomalies over southeastern South America (SESA) and either the first or the second (depending on season) leading mode of interannual ...
The Response of the Midlatitude Jet to Regional Polar Heating in a Simple Storm-Track Model
Publisher: American Meteorological Society
Abstract: AbstractGiven the recent changes in the Arctic sea ice, understanding the effects of the resultant polar warming on the global climate is of great importance. However, the interaction between the Arctic and midlatitude ...
Modal Decomposition of the Global Response to Tropical Heating Perturbations Resembling MJO
Publisher: American Meteorological Society
Abstract: AbstractThe paper presents four ensembles of numerical experiments that compare the response to monopole and dipole heating perturbations resembling different phases of the Madden?Julian oscillation (MJO). The results ...
ENSO Amplitude Modulation Associated with the Mean SST Changes in the Tropical Central Pacific Induced by Atlantic Multidecadal Oscillation
Publisher: American Meteorological Society
Abstract: he mechanism associated with the modulation of the El Niño?Southern Oscillation (ENSO) amplitude caused by the Atlantic multidecadal oscillation (AMO) is investigated by using long-term historical observational data and ...
The Role of Regional SST Warming Variations in the Drying of Meso-America in Future Climate Projections
Publisher: American Meteorological Society
Abstract: his paper addresses several hypotheses designed to explain why AOGCM simulations of future climate in the third phase of the Coupled Model Intercomparison Project (CMIP3) feature an intensified reduction of precipitation ...