Results 71 to 80 of about 17,970 (234)

Testing the Hypothesis that the MJO is a Mixed Rossby-Gravity Wave Packet [PDF]

, 2011
The Madden Julian oscillation (MJO), also known as the intraseasonal oscillation (ISO), is a planetary-scale mode of variation in the tropical Indian and western Pacific Oceans. Basic questions about the MJO are why it propagates eastward at ~5
Ingersoll, Andrew P., Yang, Da
core   +1 more source

The relationship between equatorial wave interaction and heavy rainfall in Southeast Asia

Quarterly Journal of the Royal Meteorological Society, EarlyView.
This study examines the statistical relationship between co‐occurring equatorial waves and heavy rainfall in Southeast Asia. Heavy rainfall is more closely related to combined wave activity than to individual waves in many regions of Southeast Asia. The figure shows GPM–IMERG rainfall (shading) and ERA5 850‐hPa winds (vectors) composited on days when ...
Samantha Ferrett, John Methven, Oscar Martinez‐Alvarado, Xiangbo Feng, Thomas H. A. Frame, Christopher E. Holloway, Steven J. Woolnough, Gui‐Ying Yang   +7 more
wiley   +1 more source

Modal Interference Drives Madden‐Julian Oscillation Evolution and Predictability

Geophysical Research Letters
A data‐driven dynamical filter is developed to characterize Madden‐Julian Oscillation (MJO) variability, by representing tropical variability with nonorthogonal empirical‐dynamical modes that allow for constructive and destructive interference.
David H. Marsico, John R. Albers, Matthew Newman, Maria Gehne, Juliana Dias, George N. Kiladis, Emerson LaJoie, Yan Wang   +7 more
doaj   +1 more source

The Link Between the Madden‐Julian Oscillation and Rainfall Trends in Northwest Australia

Geophysical Research Letters, 2023
Rainfall during the monsoon in northwest Australia has increased since the 1950s. Previous studies have explored possible causes of the rainfall increase; however, the trend has not been fully explained. Understanding the cause of this trend is important
Alexander Borowiak, Andrew King, Todd Lane   +2 more
doaj   +1 more source

Seasonality and Meridional Propagation of the MJO

Journal of Climate, 2006
AbstractThe Madden–Julian oscillation (MJO) is known to have a substantial impact on the variability of the Asian–Australian summer monsoons. An important, but not well understood, aspect of the MJO–monsoon connection is the meridional propagation of bands of enhanced or reduced precipitation that are especially pronounced during the northern summer ...
Philip J. Pegion, Max J. Suarez, Siegfried D. Schubert, Man-Li C. Wu, Duane E. Waliser   +4 more
openaire   +1 more source

How interference between the North Atlantic Oscillation and the tropical Indo‐Pacific convection modulates wave trains along the subtropical jet: Impacts on the Asian winter climate

Quarterly Journal of the Royal Meteorological Society, EarlyView.
This study reveals that the combined effects of the North Atlantic Oscillation (NAO) and anomalous Indo‐Pacific Walker circulation on the excitation of the wave train along the wintertime subtropical jet strongly depend on their phase combination. Their impacts interfere constructively or destructively over South Asia, leading to notable differences in
Yuki Asazuma, Masaya Kuramochi, Hiroaki Ueda   +2 more
wiley   +1 more source

Development of convection along the SPCZ within a Madden-Julian oscillation [PDF]

, 1996
A subtropical Rossby wave propagation mechanism is proposed to account for the poleward and eastward progression of intraseasonal convective anomalies along the South Pacific Convergence Zone (SPCZ) that is observed in a significant proportion of Madden ...
Ardanuy, Emanuel, Gill, Heckley, Hoskins, Hoskins, Hoskins, Hoskins, Hsu, Jin, Ju, Kiladis, Knutson, Kodama, Lau, Matthews, Nastula, Neelin, Rodwell, Rui, Vincent, Wang, Webster, Webster, Weickmann, Weickmann   +25 more
core   +2 more sources

Pathways to Better Prediction of the MJO: 2. Impacts of Atmosphere‐Ocean Coupling on the Upper Ocean and MJO Propagation

Journal of Advances in Modeling Earth Systems, 2022
AbstractThis study investigates effects of atmosphere‐ocean coupling on MJO precipitation and eastward propagation, and upper ocean conditions during and after MJO passage. To explore pathways for improving MJO prediction, three model experiments are conducted using the Unified Wave Interface‐Coupled Model at convection‐permitting (4 km) resolution: (a)
Ajda Savarin, Shuyi S. Chen
openaire   +3 more sources

A retrospective on the 2025 Atlantic hurricane season

Weather, EarlyView.
The 2025 Atlantic hurricane season was intermittent, with extended quiet periods separated by three clusters of activity. The broad‐scale conditions were often unfavourable for cyclogenesis and common drivers of activity such as La Niña were weak, but well above‐average sea temperatures still supported intense storms.
Charles W. Powell
wiley   +1 more source

Impact of MJO Propagation Speed on Active Atlantic Tropical Cyclone Activity Periods

Geophysical Research Letters
The Madden‐Julian Oscillation (MJO) is often used for subseasonal forecasting of tropical cyclone (TC) activity. However, TC activity still has considerable variability even given the state of the MJO.
Kurt A. Hansen, Matthew A. Janiga, Sharanya J. Majumdar, Benjamin P. Kirtman   +3 more
doaj   +1 more source