Atmospheric rivers (ARs) account for a large portion of winter precipitation in the western US. To evaluate sources AR and predictability at subseasonal-to-seasonal timescales, we examine relationships between two climate modes, El Niño/Southern Oscillation (ENSO) Madden-Julian oscillation (MJO), hydroclimate Our analysis uses ensemble Weather Research Forecast (WRF) model simulations from 1981...

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) ...

The impact of diurnal precipitation over Sumatra Island, the Indonesian Maritime Continent (MC), on synoptic disturbances eastern Indian Ocean is examined using high-resolution rainfall data from Global Satellite Mapping Precipitation project and Japanese 55-year Reanalysis during rainy season September to April for period 2000–2014. When cycle strong, high area observed in afternoon migrates o...

The main objective of this study is to explore seasonal impacts the Madden–Julian oscillation (MJO) on tropospheric circulations affecting Ethiopia during Belg (March–May) rains and associated variability in precipitation. data used daily rainfall, Madden-Julian indices, Outgoing Longwave Radiation (OLR) zonal meridional wind data. methods for Correlation composite analyses are establish associ...

This study aims to investigate some characteristics of the moist processes of the Madden-Julian oscillation (MJO), by making use of joint HDO (or δD) and H2O vapor measurements. The MJO is the main intraseasonal mode of the tropical climate but is hard to properly simulate in global atmospheric models. The joint use of δD-H2O diagnostics yields additional information compared to sole humidity m...

A composite life cycle of the Madden–Julian oscillation (MJO) is constructed using an index based on the first two EOFs of the bandpass-filtered (20–80 days) 850-mb zonal wind averaged from 58N to 58S every 2.58 around the equator. Precipitation, 1000-mb convergence, 850-mb wind, and 200-mb wind are composited for the period 1979–95. Water vapor integrated from the surface to 300 mb is composit...

Research has been conducted on the influence of Madden Julian Oscillation (MJO) phenomenon rainfall anomalies in Bali Province since 1991-2020. aims to figure out conditions, anomalies, and frequency distributions during existence MJO’s 4 5 phase for 1991-2020 a descriptive statistical methods. The data used is daily results observations from Jembrana Class II Climatology Station MJO phases whi...

The Madden–Julian oscillation (MJO) is the dominant mode of intraseasonal variability in the tropics. Despite its primary importance, a generally accepted theory that accounts for fundamental features of the MJO, including its propagation speed, planetary horizontal scale, multiscale features, and quadrupole structures, remains elusive. In this study, the authors use a shallow-water model to si...

The interaction between high-frequency transient disturbances and convection, and the Madden–Julian Oscillation (MJO), is investigated using NCEP–NCAR reanalysis and satellite outgoing longwave radiation data for 15 northern winters. During the phase of the MJO with enhanced convection over the East Indian Ocean and Indonesia, and suppressed convection over the South Pacific convergence zone, b...