Madden-Julian Oscillation influence on sub-seasonal rainfall variability on the west of South America.

ABSTRACT: The Madden-Julian Oscillation (MJO) is the leading driver of intraseasonal rainfall variability in the global tropics. However, the influence of MJO on western tropical South America (WTSA) has not been a focus of research. This is not surprising since the MJO convective core becomes nondescript as it propagates across the eastern Pacific, such that its influence on the Pacific coast of tropical South America is not obvious in global analyses. In this study, we examine MJO impacts on subseasonal rainfall variability in the rainiest season for WTSA (February-April). In order to avoid confusion with El Niño Southern Oscillation (ENSO) signals, only ENSO-neutral years are included in the analysis. We found that the MJO convective core reemerges when it propagates onto land in WTSA, and that i

SUBMITTER: Recalde-Coronel GC 

PROVIDER: S-EPMC7810149 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature