The circulation associated with convection of the Madden-Julian Oscillation (MJO) has been suggested to have an impact on its propagation by a number previous studies. This contains both flanking Rossby waves rear and Kelvin wave leading convective center. In this study, individual MJO envelopes from 40-year database are tracked, technique scale zonal wavelength is employed, statistical methods...

[1] An aquaplanet general circulation model is used to assess the sensitivity of intraseasonal variability to the pattern of sea surface temperature (SST) warming. Three warming patterns are used. Projected SST warming at the end of the 21st century from the Geophysical Fluid Dynamics Laboratory Climate Model 2.1 is one pattern, and zonally symmetric and globally uniform versions of this warmin...

Over the global tropics, the Madden-Julian Oscillation (Madden and Julian 1994, MJO) explains a significant amount of the variability in circulation and convection on intraseasonal time scales. However, significant variation exists in the spatial extent and seasonal occurrence of the MJO. While the upper-level divergent flow associated with MJO is often traced around the globe, the low-level wi...

Abstract Climate variabilities can have significant impacts on rainfall in East Africa, leading to disruption natural and human systems affecting the lives of tens millions people. Subseasonal interannual are critical components total variability region. The goal this study is examine combined effects Madden–Julian oscillation (MJO), operating at a subseasonal time scale, El Niño–Southern Oscil...

Abstract: TheMadden-Julian oscillation (MJO) is the dominantmode of variability in the tropical atmosphere on intraseasonal timescales and planetary spatial scales. The skeleton model is a minimal dynamical model that recovers robustly the most fundamental MJO features of (I) a slow eastward speed of roughly 5 ms−1, (II) a peculiar dispersion relation with dω/dk ≈ 0, and (III) a horizontal quad...

The impact of the El Niño–Southern Oscillation (ENSO) on the atmospheric intraseasonal variability in the North Pacific is assessed, with emphasis on how ENSO modulates midlatitude circulation anomalies associated with the Madden–Julian oscillation (MJO) in the Tropics and the westward-traveling patterns (WTP) in high latitudes. The database for this study consists of the output of a general ci...

The Madden-Julian Oscillation (MJO) plays an important role in El Niño dynamics connection with westerly wind bursts (WWBs) that occur the equatorial Pacific; however, our understanding of relationship between these climate phenomena remains incomplete. Here, we use a Lagrangian Atmospheric Model (LAM) to examine response MJO and resulting WWBs sea surface temperature (SST) anomalies similar th...

A probabilistic clustering method is used to describe various aspects of tropical cyclone (TC) tracks in the Southern Hemisphere, for the period 1969–2008. A total of 7 clusters are examined: three in the South Indian Ocean, three in the Australian Region, and one in the South Pacific Ocean. Large-scale environmental variables related to TC genesis in each cluster are explored, including sea su...