Spectral analysis of sea surface elevations produced by big storms: The case of hurricane Wilma

Mendoza, Edgar; Velasco, Manuel; Velasco-Herrera, Graciela; Martell, Raúl; Silva, Rodolfo; Escudero, Mireille; Ocampo‐Torres, Francisco J.; Mariño‐Tapia, Ismael

doi:10.1016/j.rsma.2020.101390

Cited by 9 publications

(5 citation statements)

References 17 publications

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“…so that its effects extend to the Gulf of Oman and the Persian Gulf. These factors increase the wind speed along with the summer Shamal in the Persian Gulf [49][50][51][52][53].…”

Section: Discussionmentioning

confidence: 99%

The Impact of Geostrophic Transport on the Temporal and Spatial Structure of Wind-Driven Coastal Upwelling/Downwelling over the Persian Gulf

Eshghi

Mahdizadeh

Mohammadian

2023

Water

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Geostrophic transport can affect the structure of the wind-driven coastal upwelling/downwelling. Focusing on quantifying this impact is vital to understanding circulation dynamics in the Persian Gulf. To this end, in this study, after the investigation of wind patterns, the temporal and spatial structure of coastal upwelling/downwelling using the Ekman transport upwelling index, and the intra-annual vertical variability of temperature are investigated based on the daily wind, and monthly temperature data time series of 28 years (1993–2020). Then, the geostrophic transport using an improved methodology and the total cross-shore transport as a sum of Ekman and geostrophic transport are estimated based on the monthly SLA data time series. The results indicated that the region, located around 51.5 and 28 (48 and 29 and 50.5 and 25.5) experienced the most intense coastal upwelling (downwelling) at a peak in June with larger mixed and thermocline layers than other regions. The intensity of Ekman transport is higher than the geostrophic transport in the Persian Gulf due to the presence of the prevailing wind and the shallowness of the mixed layers’ depth. We found that the intensity of the coastal upwelling (downwelling) decreases (increases) under favorable spatial and temporal conditions by considering the geostrophic transport in the upwelling index.

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“…so that its effects extend to the Gulf of Oman and the Persian Gulf. These factors increase the wind speed along with the summer Shamal in the Persian Gulf [49][50][51][52][53].…”

Section: Discussionmentioning

confidence: 99%

The Impact of Geostrophic Transport on the Temporal and Spatial Structure of Wind-Driven Coastal Upwelling/Downwelling over the Persian Gulf

Eshghi

Mahdizadeh

Mohammadian

2023

Water

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“…The energy of MEP I and MEP II not only is distributed in the highfrequency oscillations of 0.1-0.3 Hz but also has peaks of energy at low frequencies (<0.04 Hz) (Figure 4), and LEP has no energy peaks at low frequencies. The low-frequency wave energy is small; however, it affects the transport of seafloor sand layers and has a significant impact on the shape of the nearshore beach (Mendoza et al, 2020).…”

Section: Bed Level Change At Different Sitesmentioning

confidence: 99%

Bed level changes in the surf zone during post-storm beach recovery

Hu,

Li,

Zeng

et al. 2023

Front. Mar. Sci.

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The study of post-storm beach recovery is important for economic development and the protection of life in coastal areas. In this study, field observations were conducted for 21 days in the surf zone of Dongdao Beach, Hailing Island, China, after tropical storm “Cempaka”. Data on depth, wave, Eulerian velocity, sediment, three-dimensional topography of the beach, and high-frequency variations in bed-level elevation were collected. The results showed that the beach experienced medium- to low- to medium-energy waves during field observations and covered two complete astronomical tide cycles. Contrary to the effect of wave energy conditions on beaches under normal wave conditions, a higher wave energy during beach recovery can promote silting and accelerate beach recovery. Tidal water level is an important factor affecting beach restoration, and a smaller tidal range is conducive to beach accretion. In a mixed semidiurnal tide, beach erosion and accretion occurred in the “highest tide” and “sub-highest tide” tidal cycles, respectively, and the combined effect of the two affected the change in the bed level in a mixed semidiurnal tide. After the storm, the hydrodynamic forcing mechanism and self-organization process of the sand bar jointly drove the formation of the topography of the bar channel in the surf zone. After the storm stopped, the spectral energy in free surface elevation was mainly distributed in the very low frequency and decayed rapidly at the infragravity band. The very low-frequency pulsation of the surf zone during recovery is a prominent feature of bed-level elevation, depth, and velocity. This study provides a good case for the study of hydrodynamic and bed level changes in the post-storm surf zone, as well as a reference for future studies of the intrinsic mechanisms post-storm beach recovery processes around the world.

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“…Similar spectral patterns have been found in diverse phenomena that experiences abrupt changes of state due to any disturbance that are apparently stochastic, but the spectral analysis showed some periodicity. For example, spectral analysis has been used to study the variations in free surface during the passage of a hurricane, to locate hidden tunnels in archeological subsurface strata of pyramids, to analyze water levels and detect solar particles in the ground, and to understand the periodicity of these events [55][56][57][58]. The pattern of the wavelet spectral power in the prolonged period range that appears before a critical event can be used to model the battery failure function.…”

Section: A Model For Early Battery Failure Detectionmentioning

confidence: 99%

A New Methodology for Early Detection of Failures in Lithium-Ion Batteries

et al. 2023

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The early fault detection and reliable operation of lithium-ion batteries are two of the main challenges the technology faces. Here, we report a new methodology for early failure detection in lithium-ion batteries. This new methodology is based on wavelet spectral analysis to detect overcharge failure in batteries that is performed for voltage data obtained in cycling tests, subjected to a standard charge/discharge protocol. The main frequencies of the voltage temporal signal, the harmonic components in the regular cycling test, and a low frequency pattern were identified. For the first time, battery failure can be anticipated by wavelet spectral analysis. These results could be the key to the new early detection of battery failures in order to reduce out-of-control explosions and fire risks.

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Spectral analysis of sea surface elevations produced by big storms: The case of hurricane Wilma

Cited by 9 publications

References 17 publications

The Impact of Geostrophic Transport on the Temporal and Spatial Structure of Wind-Driven Coastal Upwelling/Downwelling over the Persian Gulf

The Impact of Geostrophic Transport on the Temporal and Spatial Structure of Wind-Driven Coastal Upwelling/Downwelling over the Persian Gulf

Bed level changes in the surf zone during post-storm beach recovery

A New Methodology for Early Detection of Failures in Lithium-Ion Batteries

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