We present a statistical analysis of the initiation and termination of boreal winter and boreal summer intraseasonal oscillations (ISOs). This study uses purely convection (infrared brightness temperature) data over a 23-year time interval from 1984–2006. The indices are constructed via the nonlinear Laplacian spectral analysis (NLSA) method and display high intermittency and non-Gaussian stati...

Herewe ask, what controls the horizontal scale of theMadden-Julian Oscillation, i.e., what controls its zonal wave number k?We present a new one-dimensional (1D) β-planemodel that successfully simulates theMJO with the same governing mechanism as the 2D shallow water model of Yang and Ingersoll (2013). Convection is parameterized as a short-duration localized mass source that is triggered when ...

Abstract. Teleconnections from the Madden–Julian Oscillation (MJO) are a key source of predictability weather on extended timescale about 10–40 d. The MJO teleconnection is sensitive to number factors, including mean dry static stability, flow, and propagation intensity characteristics MJO, which traditionally difficult separate across models. Each these factors may evolve in response increasin...

Abstract The Madden–Julian oscillation (MJO) is the dominant intraseasonal wave phenomenon influencing extreme weather and climate worldwide. Realistic simulations accurate predictions of MJO genesis are cornerstones for successfully monitoring, forecasting, managing meteorological disasters 3–4 weeks in advance. Nevertheless, processes emerging precursor signals an eastward-propagating event r...

Coupled ocean atmosphere general circulation models (GCM) are typically coupled once every 24 h, excluding the diurnal cycle from the upper ocean. Previous studies attempting to examine the role of the diurnal cycle of the upper ocean and particularly of diurnal SST variability have used models unable to resolve the processes of interest. In part 1 of this study a high vertical resolution ocean...

The western Maritime Continent (MC) and Southeast Asia lie at the heart of largest area high precipitation on Earth. Extreme is one major high-impact weather events to affect population over 500 million in this region. deep convection associated with extreme difficult forecast, even modern high-resolution numerical prediction explicit convection. However, larger-scale organised convective syste...

The effect of clouds on climate remains the largest uncertainty in climate change predictions, due to the inability of global climate models (GCMs) to resolve essential small-scale cloud and convection processes. We compare preindustrial and quadrupled CO2 simulations between a conventional GCM in which convection is parameterized and a "superparameterized" model in which convection is explicit...

Understanding and predicting the state of North Atlantic Oscillation (NAO) is key to forecasting weather in United Kingdom (UK). It has been shown that particular phases Madden–Julian (MJO) act as precursors either NAO+ or NAO? events. We assess ability UK Met Office coupled climate model (HadGEM3-GC3.1-MM) simulate these NAO responses at lead times 1–2 weeks show improvements are needed modell...

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...

Abstract. Despite Australian dust's critical role in the regional climate and surrounding marine ecosystems, controlling factors of spatiotemporal variations dust are not fully understood. Here we assess connections between observed with key modes large-scale variability, namely El Niño–Southern Oscillation (ENSO) Madden–Julian (MJO). Multiple observations from Aerosol Robotic Network (AERONET)...