edu.ucar.opensky::articles:24708 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T23:04:10.540155 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d73n26v2 https://doi.org/10.5281/zenodo.4646251 https Related Dataset #1 Coupled Aqua and Ridge Planets in the Community Earth System Model The dependence of tropical modes of variability on zonal asymmetry 2021-09-08T00:00:00Z publication https://n2t.org/ark:/85065/d73n26v2 https://doi.org/10.1029/2021GL093966 WU, X. author Reed, K. A. author Wolfe, C. L. P. author Marques, Gustavo M. author Bachman, Scott author Bryan, Frank O. author UCAR/NCAR - Library publisher Tropical modes of variability, including the Madden-Julian Oscillation (MJO) and the El Nino-Southern Oscillation (ENSO), are challenging to represent in climate models. Previous studies suggest their fundamental dependence on zonal asymmetry, but such dependence is rarely addressed with fully coupled ocean dynamics. This study fills the gap by using fully coupled, idealized Community Earth System Model (CESM) and comparing two nominally ocean-covered configurations with and without a meridional boundary. For the MJO-like intraseasonal mode, its separation from equatorial Kelvin waves and the eastward propagation of its convective and dynamic signals depend on the zonal gradient of the mean state. For the ENSO-like interannual mode, in the absence of the ocean's meridional boundary, a circum-equatorial dominant mode emerges with distinct ocean dynamics. The interpretation of the dependence of these modes on zonal asymmetry is relevant to their representation in realistic climate models. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright 2021 American Geophysical Union. None eng geoscientificInformation