Abstract: The previously reported spectral peak near 50 days in time series of length of day (LOD) is shown to occur in conjunction with episodes of tropical convective activity associated with the Madden-Julian oscillation (MJO). ...

Abstract: The effects of a positive-only cumulus heating parameterization on equatorially trapped waves are investigated using both nonlinear and linear single vertical mode models. In the linear model the cumulus heating is shown ...

Abstract: The impact of air?sea coupling on the dynamics of the tropical Madden?Julian oscillation (MJO) is investigated with an atmospheric general circulation model (GCM) coupled to an ocean mixed layer model. In the uncoupled ...

Abstract: The variability and time-mean response to orographic forcing are examined in a nonlinear atmospheric model. Distinct signatures from both high-frequency (synoptic-scale) and low-frequency (periods greater than 10 days) ...

Abstract: The response to steady tropical diabatic forcing in a nonlinear model of the atmosphere is analyzed. For sufficiently small diabatic heating, upper tropospheric anticyclones develop along the equator to the west of the ...

Abstract: No abstract available.

Abstract: Relationships between Indonesian rainfall and Indo-Pacific sea surface temperatures (SSTs) and circulation anomalies are investigated using observations for 1951?97. Indonesia receives significant rainfall year-round but ...

Abstract: The Bureau of Meteorology, Australia, routinely analyzes the tropospheric winds over the Australian Tropical Region (40°S?40°N, 70°?180°E). These wind data are assimilated without the use of a forecast model. While being ...

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 ...

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 ...