The first is the so-called Madden-Julian Oscillation
, a ripple of rising and sinking air that swirls through the atmosphere about every 45 to 60 days.
The propagation of the Madden-Julian oscillation
was better predicted in three of the four 3-km simulations; these three runs also featured more skillful prediction of weekly extratropical circulation anomalies, particularly during week 3 of each forecast.
Allen names a number of factors that influence seasonal tornado tallies, including El Nino, Pacific and Atlantic sea surface temperatures and seasonal wind shifts like the Madden-Julian Oscillation
or the global wind oscillation.
The states of the Madden-Julian Oscillation
(MJO) and Global Wind Oscillation (GWO) are of particular interest here.
The conditions Hotz identifies are warm ocean water, weakening Pacific winds and the Madden-Julian Oscillation
Intraseasonal variability of precipitation in Colombia and its relationship with the Madden-Julian oscillation
Other factors that often play a role in the winter weather include the Arctic Oscillation, which influences the number of arctic air masses that penetrate into the South and create nor'easters on the East Coast, and the Madden-Julian Oscillation
, which can affect the number of heavy rain events in the Pacific Northwest.
(2008) Intraseasonal interaction between the Madden-Julian oscillation
and the North Atlantic Oscillation.
The six-month field campaign, known as DYNAMO or Dynamics of the Madden-Julian Oscillation
, will help improve long-range weather forecasts and seasonal outlooks and enable scientists to further refine computer models of global climate.
The Influence of the Madden-Julian Oscillation
. Anomalous upper-level velocity divergence (represented by negative velocity potential anomalies--dashed lines in Figure 8--had been established over tropical South America by "day -9" (May 28) and persisted to "day +3" (June 09), favoring upward motion mainly between "day -3" (June 03) and "day 0" (June 06), the period of the most intense rainfall events over the state of Sao Paulo.
India's monsoon will remain weak according to the latest Madden-Julian Oscillation
(MJO) index, which gauges the eastward progress of tropical rain.
A new study published in the Journal of Geophysical Research: Atmospheres hopes to change that through observation of the tropical weather pattern known as the Madden-Julian oscillation
(MJO), and the research could be vital in mitigating the destructive effects of severe storms.