A two-way nested coupled tide-surge model for the Taiwan Strait

Zhang, Wenzhou; Hong, Huasheng; Shang, Songhao; Chen, Dewen; Chai, Fei

doi:10.1016/j.csr.2007.01.018

Cited by 31 publications

(29 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to the result presented by Wolf [1981] and cited by Horsburgh and Wilson [2007], the shallow water effect may become dominant over quadratic friction only for tidal amplitudes in excess of 3 m and water depths of 10 m or less. In the Taiwan Strait, both the tidal amplitudes and surges in this case are less than 3 m [Zhang et al, 2007], and the depths in most area are more than 10 m. Since the amplitudes of tides and surges are usually significantly smaller than water depths in the strait, water level variation contributes little to total water depth. In other words, the shallow water effect is not important in the strait.…”

Section: Shallow Water Effectmentioning

confidence: 85%

“…[8] The numerical model (the two-way Nested Coupled Tide-Surge Model, NCTSM) is described in detail by Zhang et al [2007] and is used to forecast typhoon surges by three operational forecast agencies (Oceanic and Fishery Bureau of Fujian Province, Fujian Marine Forecast Center, and Ningde Marine Forecast Center) in Fujian Province since 2007. It is a 2-D barotropic model based on depth-averaged momentum and continuity equations in the spherical coordinates as follows:…”

Section: Numerical Modelmentioning

confidence: 99%

“…where the notations are the same as those given by Zhang et al [2007]. t represents the time; (l,') represent the east longitude and north latitude; (u,v) represent the east and north components of the depth-averaged velocity q; z represents the sea surface elevation above the undisturbed sea level; H represents the total water depth, H = h + z; h represents the depth of undisturbed water; p a represents the atmospheric pressure on the sea surface; t b = (F b , G b ) represents the bottom friction; and t s = (F s , G s ) represents the wind stress.…”

Section: Numerical Modelmentioning

confidence: 99%

“…No water is allowed to flow through the coastal boundaries by making the normal component of current vanish. On the open boundaries, a radiation condition is used as follows [Zhang et al, 2007;Zhang et al, 2009]:…”

Section: Numerical Modelmentioning

confidence: 99%

See 3 more Smart Citations

Tide‐surge Interaction Intensified by the Taiwan Strait

et al. 2010

Self Cite

View full text Add to dashboard Cite

[1] The Taiwan Strait is a long and wide shelf-channel where the hydrodynamics is extremely complex, being characterized by strong tides, and where storm surges frequently occur during the typhoon season. Obvious oscillations due to tide-surge interaction were observed by tide gauges along the northern Fujian coast, the west bank of the Taiwan Strait, during Typhoon Dan (1999). Numerical experiments indicate that nonlinear bottom friction (described by the quadratic formula) is a major factor to predict these oscillations while the nonlinear advective terms and the shallow water effect have little contribution. It is found that the tide-surge interaction in the northern portion of the Taiwan Strait is intensified by the strait. Simulations based on simplified topographies with and without the island of Taiwan show that, in the presence of the island, the channel effect strengthens tidal currents and tends to align the major axes of tidal ellipses along the channel direction. Storm-induced currents are also strengthened by the channel. The pattern of strong tidal currents and storminduced currents along the channel direction enhances tide-surge interaction via the nonlinear bottom friction, resulting in the obvious oscillations along the northern Fujian coast.

show abstract

Section: Shallow Water Effectmentioning

confidence: 85%

Section: Numerical Modelmentioning

confidence: 99%

Section: Numerical Modelmentioning

confidence: 99%

Section: Numerical Modelmentioning

confidence: 99%

See 2 more Smart Citations

Tide‐surge Interaction Intensified by the Taiwan Strait

et al. 2010

Self Cite

View full text Add to dashboard Cite

show abstract

“…A two-way nested coupled tide-surge model (NCTSM) was applied in this study [Zhang et al, 2007]. This model is a two-dimensional barotropic model, based on depth-averaged shallow water equations.…”

Section: Numerical Modelmentioning

confidence: 99%

Strong southward transport events due to typhoons in the Taiwan Strait

et al. 2009

Self Cite

View full text Add to dashboard Cite

[1] Transport through the Taiwan Strait under the influence of five typhoons was investigated using both buoy observations and numerical model simulations during the period of 27 August to 5 October 2005. The results show that the effects of typhoons on the Taiwan Strait and its adjacent sea area caused strong southward transport events in the Taiwan Strait, which changed the direction of the Taiwan Strait northward transport temporarily. Typhoon-generated local wind stress and/or along-strait water level gradient were the direct driving factors in these southward transport events. The numerical results show that the Coriolis force made a negative contribution to these events and the contribution of the along-strait momentum gradient was insignificant.

show abstract

Storm Surge Reconstruction and Return Water Level Estimation in Southeast Asia for the 20th Century

et al. 2018

View full text Add to dashboard Cite

We present a methodology to reconstruct the daily maximum storm surge levels, obtained from tide gauges, based on the surrounding atmospheric conditions from an atmospheric reanalysis (20th Century Reanalysis—20CR). Tide gauge records in Southeast Asia are relatively short, so this area is often underrepresented in studies based on long observational records, and there are just a few studies that have analyzed storm surge trends, variability or return water levels (RWLs) from numerical models in this area. Here we develop, calibrate, and validate a multivariate linear regression model that relates the storm surge with the principal components of the local atmospheric conditions. This allows us to reconstruct storm surges for the 147 year 20CR period (1866–2012) and therefore to calculate more robust RWLs from the entire simulated data set and subsets thereof. RWLs are obtained by fitting the monthly maxima values to the Generalize Extreme Value (GEV) distribution. We find an increase in the 50 year RWL from the second half of the 19th century to the present unrelated to mean sea level; this increase is less noticeable when comparing only recent periods. Therefore, further research is needed since there is evidence that atmospheric reanalyses can include spurious trends in the late 19th and early 20th. RWLs obtained from the statistical reconstruction are validated against the ones obtained from observations and from a numerical model. Agreements are generally higher when using surge levels from the statistical model, even before its calibration.

show abstract

A two-way nested coupled tide-surge model for the Taiwan Strait

Cited by 31 publications

References 30 publications

Tide‐surge Interaction Intensified by the Taiwan Strait

Tide‐surge Interaction Intensified by the Taiwan Strait

Strong southward transport events due to typhoons in the Taiwan Strait

Storm Surge Reconstruction and Return Water Level Estimation in Southeast Asia for the 20th Century

Contact Info

Product

Resources

About