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Observed Relationships between Large-Scale Tropical Convection and the Tropical Circulation on Subseasonal Time Scales during Northern Hemisphere Winter
Publisher: American Meteorological Society
Abstract: The work presented is a correlative study of the interaction between large-scale tropical convection and midlatitude wind anomalies, and the tropical wind field on subseasonal time scales. Outgoing longwave radiation (OLR) ...
Annual Variation of the Diurnal Cycle of Outgoing Longwave Radiation
Publisher: American Meteorological Society
Abstract: The annual variation of the diurnal cycle of outgoing longwave radiation (OLR) is examined. Our results are based on the climatological amplitude and phase of the first diurnal harmonic for each month. The diurnal harmonic ...
Synoptic-Scale Disturbances near the Equator
Publisher: American Meteorological Society
Abstract: A spectral analysis of winds analyzed and initialized at the European Centre for Medium-Range Weather Forecasts reveals an abundance of power in the 850 mb meridional wind along the equator with periods near four days. The ...
A Composite Study of Onset of the Australian Summer Monsoon
Publisher: American Meteorological Society
Abstract: Onset of the Australian summer monsoon is identified each year (1957?87) using the wind and rainfall record at Darwin. Onset is defined as the first occurrence of wet, 850 mb westerly winds. Composites of atmospheric fields ...
The Intraseasonal (30–50 day) Oscillation of the Australian Summer Monsoon
Publisher: American Meteorological Society
Abstract: The tropical intraseasonal (30?50 day) oscillation manifests itself in the Australian summer monsoon by a pronounced modulation of the monsoonal westerlies. These 30-50 day fluctuations of the monsoonal westerlies are ...
The Structure and Annual Variation of Antisymmetric Fluctuations of Tropical Convection and Their Association with Rossby–Gravity Waves
Publisher: American Meteorological Society
Abstract: The signature of 4?5-day period Rossby?gravity waves is searched for in the tropical convection field across the Indian-Pacific oceans. The convergence/divergence field of these waves in the lower troposphere is anticipated ...
Interannual Variations of Outgoing IR Associated with Tropical Circulation Changes During 1974–78
Publisher: American Meteorological Society
Abstract: Interannual variability of outgoing IR in the tropical Pacific Ocean is studied using measurements derived from the NOAA scanning radiometer. In addition to the usual mean maps, seasonal anomaly maps are constructed from ...
An Observational Study of Tropical–Midlatitude Interaction on Intraseasonal Time Scales during Winter
Publisher: American Meteorological Society
Abstract: Eight Northern Hemisphere winters of five- and ten-day average midlatitude 500 mb heights and tropical outgoing IR are used in a correlative study of tropical-midlatitude interaction. The seasonal cycle and interannual ...