Abstract: TheMadden-Julian oscillation (MJO) is the dominantmode of variability in the tropical atmosphere on intraseasonal timescales and planetary spatial scales. The skeleton model is a minimal dynamical model that recovers robustly the most fundamental MJO features of (I) a slow eastward speed of roughly 5 ms−1, (II) a peculiar dispersion relation with dω/dk ≈ 0, and (III) a horizontal quad...

The Madden–Julian oscillation (MJO) has been demonstrated to play a role in tropical cyclone (TC) activity around the globe in a number of recent studies. While the impact of the MJO on TCs in the Atlantic basin since themid-1970s has beenwell documented, a newly developed 107-yr-long index for theMJO allows for additional analysis of the impacts of theMJO onAtlantic TC activity. TC activity in...

The Tibetan Plateau (TP), known as the third pole of the Earth, has snow cover with intraseasonal to decadal variability that affects weather and climate both inside and outside the TP. However, the factors that generate the TP snow cover (TPSC) anomalies at the intraseasonal time-scale are unclear. This report reveals the influence of the Madden‒Julian oscillation (MJO), which is the most domi...

In FY14, the objectives of our analyses of the WP-3D based LASP measurements are to understand: 1) marine atmospheric boundary layer (MABL) structure and characteristics during the DYANMO/LASP field campaign; 2) influence of convection on MABL structure and the variability of atmospheric boundary layer thermodynamic properties across the DYNAMO domain during the suppressed and active phase of M...

Dynamical understanding of the Madden-Julian Oscillation (MJO) has been elusive, and predictive capabilities therefore limited. New measurements of the ocean's response to the intense surface winds and cooling by two successive MJO pulses, separated by several weeks, show persistent ocean currents and subsurface mixing after pulse passage, thereby reducing ocean heat energy available for later ...

The behavior of convection and the Madden–Julian oscillation (MJO) is compared in two simulations from the same global climate model but with two very different treatments of convection: one has a conventional parameterization of moist processes and the other replaces the parameterization with a two-dimensional cloud-resolving model, the so-called superparameterization. The different behavior o...

We investigate how the Madden-Julian Oscillation (MJO), dominant mode of tropical subseasonal variability, modulates lifecycle cool-season North Pacific atmospheric rivers (ARs). When enhanced (suppressed) convection center is located over Indian Ocean (western Pacific), more AR events originate eastern Asia and with fewer subtropical northern Pacific. western (Indian Ocean), opposite changes o...

1 Two Madden-Julian Oscillation (MJO) events, observed during October and November 2011 in 2 the equatorial Indian Ocean during the DYNAMO field campaign, are simulated in a small-3 domain cloud-resolving model using parameterized large-scale dynamics. Three 4 parameterizations of large-scale dynamics-the conventional weak temperature gradient (WTG) 5 approximation, vertical mode based spectral...