ADCIRC2D+ - Revision history

Cblakely at 23:32, 13 April 2025

2025-04-13T23:32:51Z

@@ Line 26: / Line 26: @@
 Tidal velocity is estimated using a lagged 25-hour filter and removing the resultant mean signal from the total velocity. This ensures that dissipation from internal wave drag occurs predominantly at tidal frequencies, preserving tidal fidelity in the coupled model.
-==Density Control Namelist==
+==<code>densityControl</code> Namelist==
-Activating '''ADCIRC2D+''' is accomplished through the use of the <code>densityControl</code> namelist.
+Activating '''ADCIRC2D+''' is accomplished through the use of the <code>densityControl</code> namelist.This namelist has the following options and defaults (denoted by <code>(D)</code>)
 == References ==

Cblakely at 23:18, 13 April 2025

2025-04-13T23:18:27Z

← Older revision		Revision as of 19:18, 13 April 2025
Line 9:		Line 9:
	== Governing Equations ==		== Governing Equations ==

	ADCIRC2D+ solves a modified form of the shallow water equations using the Generalized Wave Continuity Equation (GWCE). The momentum equation includes baroclinic and internal ~~tide~~ drag terms:		ADCIRC2D+ solves a modified form of the shallow water equations using the Generalized Wave Continuity Equation (GWCE). The momentum equation includes baroclinic pressure gradient and [[Internal_Tide_Energy_Conversion\|internal wave drag terms]]:
	<math> \frac{\partial \mathbf{U}}{\partial t} + \mathbf{U} \cdot \nabla \mathbf{U} + f \mathbf{k} \times \mathbf{U} = - \nabla\left( \frac{p_s}{\rho_0} + g(\eta - \eta_{EQ} - \eta_{SAL}) \right) - \frac{\text{BPG}}{H} + \frac{\boldsymbol{\tau}_s - \boldsymbol{\tau}_b}{\rho_0 H} - \gamma_D \mathbf{C} \mathbf{U} </math>		<math> \frac{\partial \mathbf{U}}{\partial t} + \mathbf{U} \cdot \nabla \mathbf{U} + f \mathbf{k} \times \mathbf{U} = - \nabla\left( \frac{p_s}{\rho_0} + g(\eta - \eta_{EQ} - \eta_{SAL}) \right) - \frac{\text{BPG}}{H} + \frac{\boldsymbol{\tau}_s - \boldsymbol{\tau}_b}{\rho_0 H} - \gamma_D \mathbf{C} \mathbf{U} </math>

Cblakely: Created page with "'''⚠ This page is still under development. Content may change or be incomplete.''' '''ADCIRC2D+''', is a mode which allows for the inclusion of baroclinic (density-driven) effects into the traditionally barotropic (depth-averaged) system. This is achieved by coupling ADCIRC with temperature and salinity fields from a coarser-resolution Ocean General Circulation Model (OGCM), enabling improved representation of long-term sea level dynamics. Des..."

2025-04-13T23:14:41Z

Created page with "'''⚠ This page is still under development. Content may change or be incomplete.''' '''ADCIRC2D+''', is a mode which allows for the inclusion of baroclinic (density-driven) effects into the traditionally barotropic (depth-averaged) system. This is achieved by coupling ADCIRC with temperature and salinity fields from a coarser-resolution Ocean General Circulation Model (OGCM), enabling improved representation of long-term sea level dynamics. Des..."

New page

'''⚠ This page is still under development. Content may change or be incomplete.'''

'''ADCIRC2D+''', is a mode which allows for the inclusion of baroclinic (density-driven) effects into the traditionally barotropic (depth-averaged) system. This is achieved by coupling ADCIRC with temperature and salinity fields from a coarser-resolution Ocean General Circulation Model (OGCM), enabling improved representation of long-term sea level dynamics. Description of results using this capability are available in (Pringle et al. 2019)<ref name="Pringle2019" /> and (Blakely et al. 2024)<ref name="Blakely2024" />

== Version ==
{{ADC version|version=56|relation=ge}}
Some of the capability of '''ADCIRC2D+''' is available in v55; however improvements and modifications were made that are present only in v56 and above.

== Governing Equations ==

ADCIRC2D+ solves a modified form of the shallow water equations using the Generalized Wave Continuity Equation (GWCE). The momentum equation includes baroclinic and internal tide drag terms:
<math> \frac{\partial \mathbf{U}}{\partial t} + \mathbf{U} \cdot \nabla \mathbf{U} + f \mathbf{k} \times \mathbf{U} = - \nabla\left( \frac{p_s}{\rho_0} + g(\eta - \eta_{EQ} - \eta_{SAL}) \right) - \frac{\text{BPG}}{H} + \frac{\boldsymbol{\tau}_s - \boldsymbol{\tau}_b}{\rho_0 H} - \gamma_D \mathbf{C} \mathbf{U} </math>

Where:

*'''BPG''' is the depth-integrated baroclinic pressure gradient
*'''γD''' is a scaling parameter for internal wave drag
*'''C''' is the internal wave drag tensor

The baroclinic pressure gradient is computed as:
<math> \text{BPG} = \frac{g}{\rho_0} \left[ \int_{-h}^{0} \nabla \left( \int_{0}^{z} (\rho - \rho_0) \, dz' \right) dz + \eta \nabla[\eta(\rho_s - \rho_0)] \right] </math>

The internal tide drag tensor is scaled using a dissipation ratio <math>\gamma_D</math> defined by:
<math> \gamma_D = \frac{\text{Diss}_{\text{tidal}}}{\text{Diss}_{\text{total}}} = \frac{\mathbf{U}_{\text{tidal}} \cdot \mathbf{C} \cdot \mathbf{U}_{\text{tidal}}}{\mathbf{U} \cdot \mathbf{C} \cdot \mathbf{U}} </math>

Tidal velocity is estimated using a lagged 25-hour filter and removing the resultant mean signal from the total velocity. This ensures that dissipation from internal wave drag occurs predominantly at tidal frequencies, preserving tidal fidelity in the coupled model.

==Density Control Namelist==
Activating '''ADCIRC2D+''' is accomplished through the use of the <code>densityControl</code> namelist.

== References ==
<references>
<ref name="Blakely2024">Blakely, C. P., Wirasaet, D., Cerrone, A. R., Pringle, W. J., Zaron, E. D., Brus, S. R., Seroka, G. N., Moghimi, S., Myers, E. P., & Westerink, J. J. (2024). ''Dissipation Scaled Internal Wave Drag in a Global Heterogeneously Coupled Internal/External Mode Total Water Level Model''. ''Journal of Advances in Modeling Earth Systems'', 16, e2024MS004502. https://doi.org/10.1029/2024MS004502</ref>
<ref name="Pringle2019">Pringle, W. J., Gonzalez-Lopez, J., Joyce, B. R., Westerink, J. J., van der Westhuysen, A. J. (2019). ''Baroclinic Coupling Improves Depth-Integrated Modeling of Coastal Sea Level Variations Around Puerto Rico and the U.S. Virgin Islands''. ''Journal of Geophysical Research: Oceans'', 124, 2196-2217. https://doi.org/10.1029/2018JC014682</ref>
</references>