Propagation of Subseasonal Equatorially-Forced Coastal Trapped Waves down to the Benguela Upwelling System.

ABSTRACT: The oceanic connection between the coastal variability along the southwestern African coasts and the linear equatorial dynamics at subseasonal time-scales (<120 days) is examined using a variety of model outputs, ranging from linear to general circulation models. We focus on the equatorially-forced fast and weakly dissipative first-mode coastal trapped waves which are shown to propagate down to the southern tip of Africa. In the eastern equatorial Atlantic, the first-mode equatorial forcing is tangled with the higher-order Kelvin wave modes and is overshadowed by the dominant second baroclinic mode. The latter is slower and peaks 10 days after the concealed first-mode contribution. Within this time frame, the remotely-forced first-mode coastal trapped waves impinge on the variability of th

SUBMITTER: Illig S 

PROVIDER: S-EPMC6438976 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature