Simulations of MJO Propagation across the Maritime Continent: Impacts of SST Feedback

作者: Jieshun Zhu , Wanqiu Wang , Arun Kumar

DOI: 10.1175/JCLI-D-16-0367.1

关键词: ClimatologyCoupling strengthIndian oceanConvectionGeologyWind speedMadden–Julian oscillationClimate modelMeteorologyOscillationOcean current

摘要: AbstractThe observed Madden–Julian oscillation (MJO) tends to propagate eastward across the Maritime Continent from eastern equatorial Indian Ocean western Pacific. However, numerical simulations present different levels of fidelity in representing propagation, especially for tropical convection associated with MJO. This study conducts a series coupled using NCEP CFSv2 explore impacts SST feedback and parameterization on propagation simulations. First, two differing model horizontal resolutions are conducted. The MJO these is found generally insensitive resolution change. Further, based lower resolution, additional experiments performed SSTs nudged climatologies time scales air–sea coupling strength. It demonstrated that weakening strength significantly degrades propagation...

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