Results 191 to 200 of about 17,970 (234)
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MJO and its relationship to ENSO
Journal of Geophysical Research, 2008In this study, we detected the spatial and temporal characteristics of Madden‐Julian Oscillation (MJO) using zonal winds at the surface and outgoing long‐wave radiation (OLR) from the NCEP‐NCAR (U.S. National Center of Environmental Prediction‐National Center for Atmospheric Research) reanalysis product from 1981–2003.
Youmin Tang, Bin Yu
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Journal of Climate, 2022
Abstract Recent studies have shown that individual Madden–Julian oscillation (MJO) events can be categorized into four types based on their propagation characteristics: standing, jumping, slow-propagating, and fast-propagating MJOs. While their structures and impacts are well documented in observations, their representation in state-of-the-art climate ...
Seung-Yoon Back +2 more
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Abstract Recent studies have shown that individual Madden–Julian oscillation (MJO) events can be categorized into four types based on their propagation characteristics: standing, jumping, slow-propagating, and fast-propagating MJOs. While their structures and impacts are well documented in observations, their representation in state-of-the-art climate ...
Seung-Yoon Back +2 more
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Journal of the Atmospheric Sciences, 2021
Abstract The Madden–Julian oscillation (MJO) is a large-scale eastward-moving system that dominates tropical subseasonal perturbations with far-reaching impacts on global weather–climate. For nearly a half century since its discovery, there has not been a consensus on the most fundamental dynamics of the MJO, despite intensive studies with a number of ...
Ji-Eun Kim, Chidong Zhang
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Abstract The Madden–Julian oscillation (MJO) is a large-scale eastward-moving system that dominates tropical subseasonal perturbations with far-reaching impacts on global weather–climate. For nearly a half century since its discovery, there has not been a consensus on the most fundamental dynamics of the MJO, despite intensive studies with a number of ...
Ji-Eun Kim, Chidong Zhang
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Diverse MJO Genesis and Predictability
Bulletin of the American Meteorological Society, 2023Abstract The Madden–Julian oscillation (MJO) is the dominant intraseasonal wave phenomenon influencing extreme weather and climate worldwide. Realistic simulations and accurate predictions of MJO genesis are the cornerstones for successfully monitoring, forecasting, and managing meteorological disasters 3–4 weeks in advance.
Yuntao Wei +5 more
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2020
<p>This presentation introduces a theory in which the dynamic core of the MJO is described in terms of a harmonic oscillator that can be excited by stochastic forcing. The mechanism for selecting MJO scales comes from momentum damping.
Chidong Zhang, Ji-Eun Kim
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<p>This presentation introduces a theory in which the dynamic core of the MJO is described in terms of a harmonic oscillator that can be excited by stochastic forcing. The mechanism for selecting MJO scales comes from momentum damping.
Chidong Zhang, Ji-Eun Kim
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Journal of Geophysical Research: Atmospheres, 2019
AbstractThe Madden‐Julian Oscillation (MJO) is the dominant mode of tropical intraseasonal variability. Many studies have found that the MJO has significant impacts on extratropical weather. Since the MJO can act as a tropical heat source that excites Rossby waves, midlatitude weather is modulated by the MJO due to the Rossby waves that propagate into ...
C. Zheng, E. K. M. Chang
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AbstractThe Madden‐Julian Oscillation (MJO) is the dominant mode of tropical intraseasonal variability. Many studies have found that the MJO has significant impacts on extratropical weather. Since the MJO can act as a tropical heat source that excites Rossby waves, midlatitude weather is modulated by the MJO due to the Rossby waves that propagate into ...
C. Zheng, E. K. M. Chang
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Multiscale theories for the MJO
2011In the equatorial troposphere, the Madden–Julian Oscillation (MJO) is a planetaryscale wave envelope of complex multiscale convection (see Figure 17.1 for a schematic illustration). It begins as a standing wave in the Indian Ocean and propagates eastward across the western Pacific Ocean at a speed of 5 m/s.
Andrew J. Majda, Samuel N. Stechmann
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Potential vorticity aspects of the MJO
Dynamics of Atmospheres and Oceans, 2006Considering linearized motion about a resting basic state, we derive analytical solutions of the equatorial -plane primitive equations under the assumption that the o w is steady in a reference frame moving eastward with a diabatic forcing resembling a super cloud cluster.
Wayne H. Schubert, Matthew T. Masarik
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MJO influence in the Caribbean
Theoretical and Applied Climatology, 2019This study considers how the Madden Julian Oscillation (MJO) reaches the Caribbean using observational ~ 20-–80-day filtered data in the period 1998–2015. MJO’s presence is quantified by reanalysis zonal wind shear (200 minus 850 hPa) and satellite outgoing longwave radiation (OLR) in a receipt area 10–15 N, 60–80 W and in a transmission area of the ...
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Environmental Sources of Error in the Navy ESPC MJO Forecasts and MJO Teleconnections
Monthly Weather ReviewAbstract We examine the environmental conditions that lead to well- and poorly predicted MJO events in the Navy Earth System Prediction Capability (ESPC) global coupled forecast system. Individual MJO events are tracked using an MJO tracking algorithm following Chikira (2014). Good and poor forecasts are determined by how well the forecasted MJO object
Stephanie S. Rushley +2 more
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