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Oscillations in a Simple Equatorial Climate System
Publisher: American Meteorological Society
Abstract: Coupling between large-scale atmospheric and oceanic equatorial Kelvin waves is shown to be relevant in the climatic time scale related to equatorial ocean/atmosphere processes. The present analyses show that the inclusion ...
Elements of a Stochastic-Dynamical Theory of the Long-Term Variability of the El Niño/Southern Oscillation
Publisher: American Meteorological Society
Abstract: In this paper, we present the elements of a theory of the long-term variability of the El Niño/Southern Oscillation (ENSO). Three basic processes, i.e., unstable air-sea interaction, the seasonal variation and stochasfic ...
Equatorial Response to Northeasterly Cold Surges as Inferred from Satellite Cloud Imagery
Publisher: American Meteorological Society
Abstract: Day-today convective activity in the equatorial regions (10°N?10°S and 90?180°E) during December 1974 and January 1975 was estimated from NOAA satellite visible imageries using simple visual techniques. The daily convective ...
Experiment with a Simple Ocean-Atmosphere Climate Model: The Role of the Ocean in the Global Climate
Publisher: American Meteorological Society
Abstract: A study of the seasonal variation of the climatic states of the atmosphere and the ocean is made using a coupled atmosphere-ocean model. The ?domain-averaged? nature of the model enables the inclusion of effects due to ...
On the Dynamics of Equatorial Forcing of Climate Teleconnections
Publisher: American Meteorological Society
Abstract: The dynamics of equatorially forced climate teleconnections on the sphere is studied using quasi-geostrophic wave theory and numerical models. Using the concept of a refractive index for meridional propagation of energy, ...
Thermally Driven Motions in an Equatorial β-Plane: Hadley and Walker Circulations During the Winter Monsoon
Publisher: American Meteorological Society
Abstract: The linearized shallow-water equatorial ?-plane equation was solved for a subset of approximate solutions applicable to thermally driven large-scale tropical circulation. In particular, the heat-induced monsoon circulations ...
Origin of Low-Frequency (Intraseasonal) Oscilliations in the Tropical Atmosphere. Part II: Structure and Propagation of Mobile Wave-CISK Modes and Their Modification by Lower Boundary Forcings
Publisher: American Meteorological Society
Abstract: An improved treatment of diabatic heating due to moist convection is introduced into the dynamical model used in Part I of this paper to further investigate the origin of intraseasonal oscillations in the tropics. The ...
Intraseasonal and Interannual Variations of Tropical Convection: A Possible Link between the 40–50 Day Oscillation and ENSO?
Publisher: American Meteorological Society
Abstract: Intraseasonal and interannual variations of tropical convection are studied using 12 years of NOAA outgoing longwave radiation (OLR) data. The spatial patterns of OLR variance in the 1?5 day, 20?70 day and longer-than-180 ...
The Monsoon of East Asia and its Global Associations—A Survey
Publisher: American Meteorological Society
Abstract: Observations concerning the summer and winter monsoons of East Asia and their global associations are reviewed. The seasonal mean structure, transient variation, including intraseasonal to interannual, and synoptic to ...
Short-Term Climate Variability and Atmospheric Teleconnections from Satellite-Observed Outgoing Longwave Radiation. Part II: Lagged Correlations
Publisher: American Meteorological Society
Abstract: As a sequel to Part I of this study, lagged relationships in atmospheric teleconnections associated with outgoing longwave radiation (OLR) are investigated using Lagged Cross Correlations (LCC). The feasibility of extratropical ...