Weather Induced Quasi-Periodic Motions in Estuaries and Bays: Meteorological Tide

Li, Chunyan; Huang, Wei; Wu, Renhao; Sheremet, A.

doi:10.1007/s13344-020-0028-2

Cited by 16 publications

(8 citation statements)

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“…A recent study [50] investigated the weather-induced exchange flows through multiple inlets of the Barataria Bay in a few months period in 2013, 2014, and 2015 with 51 atmospheric cold fronts passing the Louisiana coast. These events are apparently very common: an analysis [51] covering a period of 40 years identified more than 1600 atmospheric frontal events, with an average of~41.2 ± 4.7 per year excluding the months between May and August for much weaker activities of this kind. However, no quantitative comparisons are made between the hydrodynamic responses induced by cold fronts and that from hurricanes.…”

Section: Introductionmentioning

confidence: 99%

Contrasting Hydrodynamic Responses to Atmospheric Systems with Different Scales: Impact of Cold Fronts vs. That of a Hurricane

Huang

2020

JMSE

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In this paper, subtidal responses of Barataria Bay to an atmospheric cold front in 2014 and Hurricane Barry of 2019 are studied. The cold fronts had shorter influencing periods (1 to 3 days), while Hurricane Barry had a much longer influencing period (about 1 week). Wind direction usually changes from southern quadrants to northern quadrants before and after a cold front’s passage. For a hurricane making its landfall at the norther Gulf of Mexico coast, wind variation is dependent on the location relative to the location of landfall. Consequently, water level usually reaches a trough after the maximum cold front wind usually; while after the maximum wind during a hurricane, water level mostly has a surge, especially on the right-hand side of the hurricane. Water level variation induced by Hurricane Barry is about 3 times of that induced by a cold front event. Water volume flux also shows differences under these two weather types: the volume transport during Hurricane Barry was 4 times of that during a cold front. On the other hand, cold front events are much more frequent (30–40 times a year), and they lead to more frequent exchange between Barataria Bay and the coastal ocean.

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Section: Introductionmentioning

confidence: 99%

Contrasting Hydrodynamic Responses to Atmospheric Systems with Different Scales: Impact of Cold Fronts vs. That of a Hurricane

Huang

2020

JMSE

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“…By filtering the time series, intra-seasonal temporal variations of waves are related to frequent cold front activities. The air pressure and wave field share an oscillation period of about 3-7 days [8].…”

Section: Discussionmentioning

confidence: 99%

“…By examining the surface weather maps, a total of 37 atmospheric cold frontal events occurred in coastal Louisiana in 2004, excluding May, June, July and August (Table 1). The average monthly number of atmospheric cold frontal events affecting the Louisiana coast over a 40-year record ranges from 3 (September) to 6.3 (January) [8]. Atmospheric cold fronts along the Louisiana coast can be roughly categorized into two end-member types: (a) arctic surges (AS storm), which are less frequent, more powerful and moving southward, affect the entire Louisiana coast almost simultaneously because the orientations of those fronts are typically parallel to the coastline; (b) migrating cyclones (MC storm), which are accompanied by a strong low-pressure system (cyclone) and have fairly strong southerly winds before the frontal passage, followed by strong northwesterly winds [32,33].…”

Section: Intra-seasonal Variation Of Atmospheric Parameters and Wavementioning

confidence: 99%

“…It has been believed that approximately 30-40 fronts per year pass over the northern Gulf-that is, one front every 3-10 days [6,7]. A recent study [8] for a 40-year record shows that there are 41.2 ± 4.7 fronts per The maximum wave variability and wave energy occur during the passing of a cold front [9][10][11][12][13][14]. Although cold fronts are less extreme than hurricanes and the resulting wind wave height is much less than hurricane waves, they are frequent in fall, winter and spring, and the waves generated by the weather systems may cause damage to the coastal marine infrastructures.…”

Section: Introductionmentioning

confidence: 99%

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Atmospheric Cold Front-Generated Waves in the Coastal Louisiana

Cao

2020

JMSE

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Atmospheric cold front-generated waves play an important role in the air–sea interaction and coastal water and sediment transports. In-situ observations from two offshore stations are used to investigate variations of directional waves in the coastal Louisiana. Hourly time series of significant wave height and peak wave period are examined for data from 2004, except for the summer time between May and August, when cold fronts are infrequent and weak. The intra-seasonal scale variations in the wavefield are significantly affected by the atmospheric cold frontal events. The wave fields and directional wave spectra induced by four selected cold front passages over the coastal Louisiana are discussed. It is found that significant wave height generated by cold fronts coming from the west change more quickly than that by other passing cold fronts. The peak wave direction rotates clockwise during the cold front events. The variability of the directional wave spectrum shows that the largest spectral density is distributed at low frequency in the postfrontal phase associated with migrating cyclones (MC storms) and arctic surges (AS storms).

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“…Cold fronts are recurring phenomena with a time interval of approximately 3-7 days (Roberts et al, 1989). A 40-year statistical review of weather data revealed that coastal Louisiana experiences 41 ± 5 cold front passages every year between October and the following April (Li et al, 2020). Before a typical frontal passage (pre-frontal) in coastal Louisiana, southerly and easterly winds drive shelf water to the shore.…”

Section: Introductionmentioning

confidence: 99%

A numerical experiment of cold front induced circulation in Wax Lake Delta: evaluation of forcing factors

Feizabadi,

Li,

Hiatt

2023

Front. Mar. Sci.

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The effects of passing atmospheric cold fronts with different orientations and moving directions on the hydrodynamics of the Wax Lake Delta (WLD) were analyzed by considering the influence of river discharge, cold front moving direction, wind magnitude, and Coriolis effect. The study employs numerical simulations using the Delft-3D model and an analytical model to explore water volume transport, water level variations, water circulation, and particle trajectories during nine cold front events. Results indicate that cold fronts cause a decrease in the average contribution of the water transport through western channels and an increase of that in central and eastern channels. A westerly cold front with an average wind speed of ~12 m/s can increase water transport through eastern channels by about 35%. During the passage of a cold front, the intertidal islands between the main channels and East Bay experience the largest fluctuations in subtidal water levels, which can be attributed to the influence of local wind stress. For example, a westerly cold front can result in a water level variation of approximately 0.45 m over some of the intertidal Islands and 0.65 m in the East Bay. Results also show that the subtidal water circulation in the WLD is correlated with the Wax Lake Outlet (WLO) discharge and wind magnitude. The findings illustrate that when WLO discharge is low, the impact of cold fronts is more pronounced, and cold fronts from the west have a greater impact compared to those from the northwest and north. This study identifies the significance of WLO discharge and Coriolis force by the trajectories of particles in the water column. The results of the simulations indicate that under low WLO discharge (less than 2000 m3/s), the majority of particles are found to exit through Campground Pass instead of Gadwall because of the dominance of Coriolis force. To summarize, this study assesses the impact of cold fronts on the hydrodynamics of the Wax Lake Delta, underscoring the contributions of multiple factors, including the cold front moving direction, river discharge, wind strength, and Coriolis force.

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Weather Induced Quasi-Periodic Motions in Estuaries and Bays: Meteorological Tide

Cited by 16 publications

References 50 publications

Contrasting Hydrodynamic Responses to Atmospheric Systems with Different Scales: Impact of Cold Fronts vs. That of a Hurricane

Contrasting Hydrodynamic Responses to Atmospheric Systems with Different Scales: Impact of Cold Fronts vs. That of a Hurricane

Atmospheric Cold Front-Generated Waves in the Coastal Louisiana

A numerical experiment of cold front induced circulation in Wax Lake Delta: evaluation of forcing factors

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