Evaluating extreme cyclonic sea states

Mattioli, Matteo; Masi, Giulia De; Drago, Michele

doi:10.1016/j.oceaneng.2019.106639

Cited by 3 publications

(2 citation statements)

References 28 publications

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“…Winds are often underestimated at some locations, mainly in the Southern Hemisphere, due to the lack of observational data (e.g., Stopa and Cheung, 2014). This problem contributes to the misrepresentation of cyclones, particularly the most intense ones, which leads to issues in windwave climate hindcast and forecast (e.g., Kumar et al, 2003;Campos and Guedes Soares, 2016;Bakhtyar et al, 2018;Mattioli et al, 2019;Campos et al, 2019), and storm surge estimations (e.g., Colle et al, 2010;Booth et al, 2016;Sebastian et al, 2019). Therefore, it is important to evaluate cyclone and storm track characteristics of datasets available at high temporal resolution, since 1-hourly fields are frequently used to support the production of wave hindcasts and forecasts, and energy sector assessments.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Atlantic extratropical storm tracks characteristics in 41 years of ERA5 and CFSR/CFSv2 databases

et al. 2020

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Section: Introductionmentioning

confidence: 99%

Analysis of Atlantic extratropical storm tracks characteristics in 41 years of ERA5 and CFSR/CFSv2 databases

et al. 2020

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“…The assessment of extreme waves generated by typhoons (tropical cyclones) is fundamental for coastal planning. Yet, such storm events exhibit strong variability on relatively short timespans, implying that standard statistical methods applied to waves hindcasted or measured at a certain location could lead to uncertain or highly approximate results (Mattioli et al, 2019). This underscores the benefits of comparing a recent typhoon with past HEW events using boulder-inferred data.…”

Section: Aimsmentioning

confidence: 99%

Clustered, Stacked and Imbricated Large Coastal Rock Clasts on Ludao Island, Southeast Taiwan, and Their Application to Palaeotyphoon Intensity Assessment

et al. 2021

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This work investigated the characteristics of a boulder field on the exposed south east coast of Ludao Island (Green Island) in southern Taiwan. Although the region regularly experiences seasonal Pacific typhoons, fieldwork on Ludao was prompted following the double-strike of Typhoon Tembin in August 2012, which followed an unusual looping track and was one of the strongest storms to affect the island in recent decades. In Wen Cuen Bay, large limestone and volcanic clasts (103–105 kg) occur both as isolated individuals and also grouped into distinct clusters across the gently-sloping emerged reef platform of Holocene age. Some individuals reach megaclast proportions. Observations revealed limited evidence for the production of new coastal boulders by Typhoon Tembin. However, clustering, stacking and notable imbrication of old large clasts provide evidence for multiple high-energy palaeoevents. Stacking and imbrication are significant depositional features, implying that (partial) lifting by wave transport was responsible. Boulders deposited by Typhoon Tembin suggest that storm produced minimum flow velocities of 3.2–5.1 m/s. This range of minimum flow velocity (MFV) values is lower than the 4.3–13.8 m/s range inferred from the pre-Tembin boulders, which indicates that older storm washovers must have been stronger, judging from their ability to stack and imbricate large clasts. One explanation for high upper values of palaeoevent MFVs is that localized funnelling of water flow through narrow relict channels (inherited spur-and-groove morphology, oriented perpendicular to the modern reef edge) concentrates onshore flow energy into powerful confined jets. Support for this hypothesis is the positioning and train-of-direction of the main imbricated boulder cluster at the landward head of one such feature. Geomorphic controls amplifying wave-driven flow velocities across the emerged Holocene reef mean that a palaeotyphoon origin is sufficient for explaining large clast stacking and imbrication, without the need to invoke a tsunami hypothesis.

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Spatial estimation of unidirectional wave evolution based on ensemble data assimilation

Zhang,

Tang,

2024

European Journal of Mechanics - B/Fluids

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Evaluating extreme cyclonic sea states

Cited by 3 publications

References 28 publications

Analysis of Atlantic extratropical storm tracks characteristics in 41 years of ERA5 and CFSR/CFSv2 databases

Analysis of Atlantic extratropical storm tracks characteristics in 41 years of ERA5 and CFSR/CFSv2 databases

Clustered, Stacked and Imbricated Large Coastal Rock Clasts on Ludao Island, Southeast Taiwan, and Their Application to Palaeotyphoon Intensity Assessment

Spatial estimation of unidirectional wave evolution based on ensemble data assimilation

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