Indonesia has diverse topographical conditions that result in having a unique climate. One of the climate elements to be studied is rainfall, because rainfall different pattern each region, this caused by several phenomena factors affect pattern, including El-Nino Southern Oscillation (ENSO), Indian Ocean Dipole (IOD) and Madden Julian (MJO). Medan City capital North Sumatra province which one ...

Given the increasing attention in forecasting weather and climate on subseasonal time scale recent years, National Oceanic Atmospheric Administration (NOAA) announced to support Climate Process Teams (CPTs) which aim improve Madden-Julian Oscillation (MJO) prediction by NOAA’s global models. Our team supported this CPT program focuses primarily improvement of upper ocean mixing parameterization...

Substantial (∼2°C) basin averaged sea surface temperature (SST) cooling in the Banda Sea occurred less than a 14-day period during 2015 boreal winter Madden-Julian Oscillation (MJO). Such rapid and large associated with MJO has not been reported at least last two decades. Processes that control substantial event are examined using high-resolution ocean reanalysis one-dimensional (1-D) model sim...

Abstract The Madden‐Julian oscillation (MJO) significantly impacts North Atlantic hurricanes, with increased hurricane activity occurring when the MJO enhances convection over Africa and tropical Indian Ocean suppressed Pacific. Using data from 1905 to 2015, we find more cyclones (TCs) make landfall in continental United States convection. In addition, Western Pacific Hemisphere convection, TC ...

Abstract The quasi‐biennial oscillation (QBO) impacts the Madden‐Julian Oscillation (MJO) activity with a stronger MJO in QBO easterly (QBOE) than westerly (QBOW) winters. However, this relationship is poorly represented current generation climate models. For first time, paper applies stratospheric zonal‐mean nudging subseasonal prediction system to capture it. Two strong cases QBO‐neutral wint...

Basinwide convective anomalies over the IndianOcean (IO) associated with theMadden–Julian oscillation (MJO) sometimes propagate eastward and reach the west Pacific (WP), but sometimes do not. Long-term observations and reanalysis products are used to investigate the difference between the propagating and nonpropagating MJO events. IO convection onset events associated with the MJO are grouped i...

Abstract. The Madden–Julian oscillation (MJO) is the main controller of weather in tropics on intraseasonal timescales, and recent research provides evidence that quasi-biennial (QBO) influences MJO interannual variability. However, physical mechanisms behind this interaction are not completely understood. Recent studies normal-mode structure indicate contribution global-scale Kelvin Rossby wav...

Simplified asymptotic models are developed to investigate tropical–extratropical interactions. Two kinds of interactions are illustrated in the model: (i) MJO initiation through extraction of energy from barotropic Rossby waves and (ii) MJO termination via energy transfer to extratropical Rossby waves. A new feature, in comparison to previous simplified models, is that here these waves interact...