Estimation of extreme wave height return periods from short-term interpolation of multi-mission satellite data: application to the South Atlantic

Estimation of extreme wave height return periods from short-term interpolation of multi-mission satellite data: application to the South Atlantic

<p>We analyzed the spatial pattern of wave extremes in the South Atlantic Ocean by using multiple altimeter platforms spanning the period 1993–2015. Unlike the traditional approach adopted by previous studies, consisting of computing the monthly mean, median or maximum values inside a bin o...

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Main Authors: J. Salcedo-Castro, N. P. da Silva, R. de Camargo, E. Marone, H. H. Sepúlveda
Format: Article
Language:English
Published: Copernicus Publications 2018-08-01
Series:Ocean Science
Online Access:https://www.ocean-sci.net/14/911/2018/os-14-911-2018.pdf
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spelling doaj-cf696e3a1fea4321bda0f1df733593e82020-11-25T00:26:46ZengCopernicus PublicationsOcean Science1812-07841812-07922018-08-011491192110.5194/os-14-911-2018Estimation of extreme wave height return periods from short-term interpolation of multi-mission satellite data: application to the South AtlanticJ. Salcedo-Castro0N. P. da Silva1R. de Camargo2E. Marone3H. H. Sepúlveda4Centro de Estudios Avanzados, Universidad de Playa Ancha, Traslaviña 450, Viña del Mar, ChileDepartamento de Ciências Atmosféricas, Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, Rua do Matão, 1226, 05508-900, São Paulo, SP, BrazilDepartamento de Ciências Atmosféricas, Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, Rua do Matão, 1226, 05508-900, São Paulo, SP, BrazilCentro de Estudos do Mar, Universidade Federal do Paraná, Av. Beira Mar s/n, 83255-000, Pontal do Sul, PR, BrazilDepartamento de Geofísica, Universidad de Concepción, Avenida Esteban Iturra s/n, Barrio Universitario, Concepción, Chile<p>We analyzed the spatial pattern of wave extremes in the South Atlantic Ocean by using multiple altimeter platforms spanning the period 1993–2015. Unlike the traditional approach adopted by previous studies, consisting of computing the monthly mean, median or maximum values inside a bin of certain size, we tackled the problem with a different procedure in order to capture more information from short-term events. All satellite tracks occurring during a 2-day temporal window were gathered in the whole area and then gridded data were generated onto a mesh size of 2° × 2° through optimal interpolation. The peaks over threshold (POT) method was applied, along with the generalized Pareto distribution (GPD). The results showed a spatial distribution comparable to previous studies and, additionally, this method allowed for capturing more information on shorter timescales without compromising spatial coverage. A comparison with buoy observations demonstrated that this approach improves the representativeness of short-term events in an extreme events analysis.</p>https://www.ocean-sci.net/14/911/2018/os-14-911-2018.pdf
collection DOAJ
language English
format Article
sources DOAJ
author J. Salcedo-Castro
N. P. da Silva
R. de Camargo
E. Marone
H. H. Sepúlveda
spellingShingle J. Salcedo-Castro
N. P. da Silva
R. de Camargo
E. Marone
H. H. Sepúlveda
Estimation of extreme wave height return periods from short-term interpolation of multi-mission satellite data: application to the South Atlantic
Ocean Science
author_facet J. Salcedo-Castro
N. P. da Silva
R. de Camargo
E. Marone
H. H. Sepúlveda
author_sort J. Salcedo-Castro
title Estimation of extreme wave height return periods from short-term interpolation of multi-mission satellite data: application to the South Atlantic
title_short Estimation of extreme wave height return periods from short-term interpolation of multi-mission satellite data: application to the South Atlantic
title_full Estimation of extreme wave height return periods from short-term interpolation of multi-mission satellite data: application to the South Atlantic
title_fullStr Estimation of extreme wave height return periods from short-term interpolation of multi-mission satellite data: application to the South Atlantic
title_full_unstemmed Estimation of extreme wave height return periods from short-term interpolation of multi-mission satellite data: application to the South Atlantic
title_sort estimation of extreme wave height return periods from short-term interpolation of multi-mission satellite data: application to the south atlantic
publisher Copernicus Publications
series Ocean Science
issn 1812-0784
1812-0792
publishDate 2018-08-01
description <p>We analyzed the spatial pattern of wave extremes in the South Atlantic Ocean by using multiple altimeter platforms spanning the period 1993–2015. Unlike the traditional approach adopted by previous studies, consisting of computing the monthly mean, median or maximum values inside a bin of certain size, we tackled the problem with a different procedure in order to capture more information from short-term events. All satellite tracks occurring during a 2-day temporal window were gathered in the whole area and then gridded data were generated onto a mesh size of 2° × 2° through optimal interpolation. The peaks over threshold (POT) method was applied, along with the generalized Pareto distribution (GPD). The results showed a spatial distribution comparable to previous studies and, additionally, this method allowed for capturing more information on shorter timescales without compromising spatial coverage. A comparison with buoy observations demonstrated that this approach improves the representativeness of short-term events in an extreme events analysis.</p>
url https://www.ocean-sci.net/14/911/2018/os-14-911-2018.pdf
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