Preprint Article Version 1 This version is not peer-reviewed

Estimating Zonal Ekman Transport along Coastal Senegal during Passage of Hurricane Fred (2015) from August 30 to 31, 2015

Version 1 : Received: 10 November 2019 / Approved: 12 November 2019 / Online: 12 November 2019 (09:32:21 CET)

How to cite: Dieng, A.L.; Ndoye, S.; Jenkins, G.S.; Sall, S.M.; Gaye, A.T. Estimating Zonal Ekman Transport along Coastal Senegal during Passage of Hurricane Fred (2015) from August 30 to 31, 2015. Preprints 2019, 2019110125 (doi: 10.20944/preprints201911.0125.v1). Dieng, A.L.; Ndoye, S.; Jenkins, G.S.; Sall, S.M.; Gaye, A.T. Estimating Zonal Ekman Transport along Coastal Senegal during Passage of Hurricane Fred (2015) from August 30 to 31, 2015. Preprints 2019, 2019110125 (doi: 10.20944/preprints201911.0125.v1).

Abstract

We examine the role of zonal Ekman transport along the coast of Senegal on 30 August, 2015 when the tropical disturbance associated with Tropical Cyclone Fred was located to the west of Senegal causing considerable coastal damage to coastal areas south of Dakar, Senegal. Ten-meter winds from three Weather Research and Forecast model simulations were used to estimate zonal Ekman transport, with the largest values found during the 30 August. The simulations are in agreement with limited coastal observations showing increasing southerly wind speeds during 30 August but are overestimated relative to the 3 coastal stations. The strong meridional winds translate into increased zonal Ekman transport to the coast of Senegal on 30 August. The use of a coupled ocean model will improve the estimates of Ekman transport along the Guinea-Senegalese coast. The observed damage suggests that artificial and natural barriers (mangroves) should be strengthened to protect coastal communities in Senegal.

Subject Areas

tropical cyclone; Weather Research and Forecast model; zonal Ekman transport

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