Abstract This study investigates the intraseasonal change in diurnal cycle of rainfall over Sumatra terms Madden Julian oscillation (MJO) phases. Change peak time mean accumulation (PA), frequency (PF), and intensity (PI) precipitation from Integrated Multi-Satellite Retrievals GPM (IMERG) final run product version 06 data during 2016-2019 was investigated. Data were classified into active (2,3...

The seasonality of circumnavigation Madden–Julian Oscillation (MJO) events is examined using 42 years observations, reanalysis, and global model simulations. MJO are most likely to propagate across the Atlantic Ocean, Africa back equatorial Indian Ocean relatively unweakened during March–April–May a lesser extent September–October–November. During these seasons, referred as “long-rain” “short-r...

Abstract Based on the database of Subseasonal to Seasonal (S2S) Prediction project World Weather Research Programme (WWRP) / Climate (WCRP), influence North Atlantic Oscillation (NAO) Madden- Julian (MJO) and its forecast skill is investigated. It found that most models can capture MJO phase changes following positive negative NAO events. About 20 days after initialized with a (negative) NAO, a...

Abstract The predictability limit of the Madden‐Julian Oscillation (MJO) in El Niño and La Niña boreal winters (November‐February) is investigated using observational data historical run outputs CMIP models. MJO computed by nonlinear local Lyapunov exponents approach for various indices obtained from bandpass‐filtered (30–80 days) outgoing longwave radiation, 850‐hPa zonal wind, 200‐hPa wind da...

A better understanding of multiscale interactions within the Madden–Julian oscillation (MJO), including momentum exchanges, is critical for improved MJO prediction skill. In this study, convective momentum transport (CMT) associatedwith theMJO is analyzed based on theNOAAClimate Forecast SystemReanalysis (CFSR). A three-layer vertical structure associated with the MJO, as previously suggested i...

This study examines the modulation of land-based extreme precipitation around globe by Madden-Julian Oscillation (MJO). The upper-level convergent phase MJO inhibits events over most regions but enhancement in other phases falls three categories. Over Brazil, Southeast Asia, and Australia, 2-year rainfall are common near core divergence as expected. For tropics subtropics, occur along periphery...

Antarctica is one of the regions where the earth’s surface is warming most rapidly. The interdecadal warming trend over much of Antarctica during the austral winter is about 1 ◦C decade−1, which is almost twice that of the global mean. There is increasing observational and modeling evidence that high-latitude warming is linked to localized heating in the tropics. Here we show that interdecadal ...

The moisture budget associated with the eastward-propagating Madden–Julian oscillation (MJO) was diagnosed using 1979–2001 40-yr ECMWF Re-Analysis (ERA-40) data. A marked zonal asymmetry of the moisture relative to the MJO convection appears in the planetary boundary layer (PBL, below 700 hPa), creating a potentially more unstable stratification to the east of the MJO convection and favoring th...

5 This work studies the significance of asymmetry in systems of organized convection asso6 ciated with the Madden-Julian oscillation (MJO). Satellite infrared brightness temperature 7 data for the period 1983–2006 were decomposed into subsets symmetric and antisymmetric 8 about the equator. Using a recent nonlinear objective method called nonlinear Laplacian 9 spectral analysis, modes of variab...

The barrier layer, the layer between the bottom of the density-defined mixed layer and the isothermal layer in the upper ocean, may play a role in air-sea dynamics. In the present study, data from Argo profiling floats in the tropical Indian Ocean and a mooring at 90 E, 0 N are used to examine subseasonal variations in upper ocean salinity and barrier-layer thickness (BLT) during boreal winter....