Characterization of wave climate and trends for Alagoas State, NE Brazil

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Continental Shelf Research Pub Date : 2025-02-01 DOI:10.1016/j.csr.2024.105397

Filipe Vieira , Alexsandra S. Lima , Geórgenes H. Cavalcante

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Abstract

This study presents a spectral wave model developed and validated for the Alagoas State in NE Brazil using satellite altimeter data. The model, spanning 32 years from 1979 to 2010, driven by CFSR wind forcing, captures the wave climate dynamics across seasons and regions. Energetic waves dominate winter and spring, contrasting with milder conditions in summer. Spatially, heightened wave activity is concentrated in the southern border with Sergipe, notably near the São Francisco River mouth, gradually tapering off towards the northern coast. Trends in significant wave height (H_m0) reveal seasonal fluctuations, with winter and spring exhibiting positive trends, while summer trends are predominantly negative. Notably, winter trends peak at 0.6% per year along the central to southern coastal stretch. Conversely, summer witnesses a maximum negative trend of 0.4% per year nearshore. Over the 32-year span, the annual mean shows a general negative trend (∼0.2% per year) across most of the study area, albeit with minor positive trends in the northern region. Particularly noteworthy is the accelerated increase (∼0.4% per year) in extreme conditions (P99) nearshore where H_m0 reached 2.7 m on Maceió coast potentially exacerbating erosion and should be the object of further considerations for coastal management design.

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来源期刊

Continental Shelf Research 地学-海洋学

CiteScore

4.30

自引率

4.30%

发文量

136

审稿时长

6.1 months

期刊介绍： Continental Shelf Research publishes articles dealing with the biological, chemical, geological and physical oceanography of the shallow marine environment, from coastal and estuarine waters out to the shelf break. The continental shelf is a critical environment within the land-ocean continuum, and many processes, functions and problems in the continental shelf are driven by terrestrial inputs transported through the rivers and estuaries to the coastal and continental shelf areas. Manuscripts that deal with these topics must make a clear link to the continental shelf. Examples of research areas include: Physical sedimentology and geomorphology Geochemistry of the coastal ocean (inorganic and organic) Marine environment and anthropogenic effects Interaction of physical dynamics with natural and manmade shoreline features Benthic, phytoplankton and zooplankton ecology Coastal water and sediment quality, and ecosystem health Benthic-pelagic coupling (physical and biogeochemical) Interactions between physical dynamics (waves, currents, mixing, etc.) and biogeochemical cycles Estuarine, coastal and shelf sea modelling and process studies.