Abstract For the tropical country of Sri Lanka, subseasonal variability in precipitation is both ecologically and societally relevant, influencing agricultural yields, natural hazard risk, energy production, disease incidence. The primary driver this Madden–Julian oscillation (MJO). Here we investigate influence on Lankan across seasons, describing MJO-associated patterns exploring potential fo...

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...

Sea levels in the Western North Pacific (WNP) are presented with anomalous intraseasonal variations. This study examines response of sea level WNP to atmospheric Intraseasonal Oscillation modes, namely Madden–Julian (MJO) and Boreal Summer (BSISO), using 25 years (1993–2017) satellite altimetry barotropic model output. In winter, MJO has significant effects on component due instant wind pressur...

Various indices have been defined to characterize the phase and amplitude of Madden-Julian oscillation (MJO). One widely used index is outgoing longwave radiation (OLR) based MJO (OMI), which calculated using spatial pattern 30–96-day eastward-filtered OLR. The empirical orthogonal functions (EOFs) calculate OMI in observations are prone degeneracy exhibit oscillations on order 10–20 days, desp...

Makassar merupakan salah satu kota terbesar di Indonesia yang rentan terhadap kejadian hujan ekstrem sehingga diperlukan indeks peringatan dini untuk meminimalisir resiko akan ditimbulkan jika terjadi ekstrem. Data digunakan dalam pembuatan meliputi data angin ( divergence dan relative vorticity ), Madden-Julian oscillation (MJO), anomali outgoing longwave radiation (OLR), southern index (SOI) ...

Reducing systematic errors of state-of-the-art General Circulation Models (GCMs) will increase our confidence on the projection of future climate change and improve our forecast skills of present-day weather and climate variability. One systematic error of current GCMs is the failure to simulate a dominant tropical atmospheric variability: Madden-Julian Oscillation (MJO). Through downscale and ...

Abstract This study investigates the role of convection–circulation coupling on simulated eastward propagation Madden–Julian Oscillation (MJO) over Maritime Continent (MC). Experiments are conducted with European Centre Hamburg Model Version 5 (ECHAM5) coupled one-column ocean model—Snow-Ice-Thermocline (SIT) and two different cumulus schemes, Nordeng-Tiedtke (E5SIT-Nord) Tiedtke (E5SIT-Tied). ...

The impacts of the Madden-Julian Oscillation (MJO) on polar low (PL) activity are examined. We found that PL frequency increases over Irminger Sea and decreases Norwegian-Barents Seas following MJO Phases 2–4, nearly opposite changes for 6–8. Further analysis reveals significant anomalies static stability low-level baroclinicity different phases, which have opposing effects in many regions. dia...