Journal of Geophysical Research: Oceans RESEARCH ARTICLE 10.1029/2017JC013539 This article is a companion to Illig et al. [2018], https://doi.org/10.1029/ 2017JC013540.
Subseasonal Coastal-Trapped Wave Propagations in the Southeastern Pacific and Atlantic Oceans: 1. A New Approach to Estimate Wave Amplitude Serena Illig1,2
, Emeline Cadier2, Marie-Lou Bache`lery2,3
2,4 , and Marion Kersale
1
Key Points: We introduce and validate a simple methodology to estimate gravest CTW mode contributions to coastal variability from ocean model outputs Inferred CTW characteristics (modal amplitude and propagating velocities) agree with the solution of a simple multimode linear CTW model CTW dynamics controls a large part of the subseasonal variability along the coasts of southwestern American and African continents
Correspondence to: S. Illig,
[email protected]
Citation: Illig, S., Cadier, E., Bache`lery, M.-L., & Kersal e, M. (2018). Subseasonal coastal-trapped wave propagations in the southeastern Pacific and Atlantic Oceans: 1. A new approach to estimate wave amplitude. Journal of Geophysical Research: Oceans, 123, 3915–3941. https://doi.org/10.1029/2017JC013539 Received 9 OCT 2017 Accepted 31 MAR 2018 Accepted article online 5 APR 2018 Published online 8 JUN 2018
Laboratoire d’Etudes en G eophysique et Oc eanographie Spatiale (LEGOS), CNRS/IRD/UPS/CNES, Toulouse, France, Department of Oceanography, MARE Institute, LMI ICEMASA, University of Cape Town, Cape Town, South Africa, 3 Nansen-Tutu Centre, Marine Research Institute, Department of Oceanography, University of Cape Town, Cape Town, South Africa, 4NOAA/Atlantic Oceanographic and Meteorological Laboratory, Cooperative Institute for Marine and Atmospheric Studies, University of Miami, Miami, FL, USA 2
Abstract The Humboldt and the Benguela upwelling systems are connected to the equatorial variability through the coastal waveguide, so that a large variance of the coastal sea level and current variability can be described as an infinite sum of orthonormal free Coastal-Trapped Wave (CTW) modes. The objective of this study is to infer the CTW mode contributions to the coastal variability in both systems at subseasonal timescales (
