There are rich variabilities in the global atmosphere and climate system on intraseasonal time scale. This review article focuses Madden-Julian Oscillation (MJO), which is dominant mode of tropical variability. The MJO has a tremendous impact represents major source skill for subseasonal to seasonal predictions. Our knowledge been advanced recent decades, but challenges remain understanding, si...

The influence of the Madden-Julian Oscillation (MJO) on surface air temperature over Iran is examined using daily data from meteorological stations 1979 to 2015. Composites anomalies are positive in MJO phases 1 and 8 negative 3–4 with broader region tendencies also 2 7, 5–6. This variability associated horizontal advection, whereby southerly (northward) winds act heat northerly (southward) coo...

Most studies of the impact sea surface temperature (SST) have explored rainfall in a part Indonesia. This paper takes different approach and explores air-sea coupling interaction between Madden-Julian Oscillation (MJO) SST on variability East Nusa Tenggara (NTT). study uses daily observation from some NTT seasonal zone (ZOM) 1991to 2016. Meanwhile, gridded data around was obtained Japan Meteoro...

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 ...

The Madden-Julian oscillation (MJO) modulates atmospheric river (AR) activity along the West Coast of North America. forecast skill ARs based solely on MJO phase is limited, motivating identification other predictive factors. Here we show that low-frequency variability Pacific/North American (PNA) pattern mostly independent MJO, and monthly PNA influences MJO-AR relationship much more robustly ...

Reproducing the Madden-Julian Oscillation (MJO) remains a challenge in many climate models. This study compares MJO simulation skills 17 pairs of Coupled Model Intercomparison Project Phase 5 (CMIP5) and 6 (CMIP6) simulations. Generally, characteristics are better reproduced CMIP6, their inter-model spreads obviously reduced CMIP6. However, most CMIP6 models still underestimate frequency initia...

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 Madden–Julian Oscillation (MJO) is the dominant form of the atmospheric intra-seasonal oscillation, manifested by slow eastward movement (about 5 m s−1) of tropical deep convection. This study investigates the MJO’s impact on equatorial tropospheric ozone (10 N–10 S) in satellite observations and chemical transport model (CTM) simulations. For the satellite observations, we analyze the Trop...

Abstract Recent observations have indicated significant modulation of the Madden Julian Oscillation (MJO) by phase stratospheric Quasi-Biennial (QBO) during boreal winter. Composites MJO show that upper tropospheric ice cloud fraction and water vapor anomalies are generally collocated, an eastward tilt with height in exists. Through radiative transfer calculations, it is shown clouds a stronger...