Abstract
This article is the second of a two-part paper on ELCIRC, an Eulerian-Lagrangian finite difference/finite volume model designed to simulate 3D baroclinic circulation across river-to-ocean scales. In part one (Zhang et al., 2004), we described the formulation of ELCIRC and assessed its baseline numerical skill. Here, we describe the application of ELCIRC within CORIE, a coastal margin observatory for the Columbia River estuary and plume. We first introduce the CORIE modeling system and its multiple modes of simulation, external forcings, observational controls, and automated products. We then focus on the evaluation of highly resolved, year-long ELCIRC simulations, using two variables (water level and salinity) to illustrate simulation quality and sensitivity to modeling choices. We show that, process-wise, simulations capture well important aspects of the response of estuarine and plume circulation to ocean, river, and atmospheric forcings. Quantitatively, water levels are robustly represented, while salinity intrusion and plume dynamics remain challenging. Our analysis highlights the benefits of conducting model evaluations over large time windows (months to years), to avoid significant localized biases. The robustness and computational efficiency of ELCIRC has proved invaluable in identifying and reducing non-algorithmic sources of errors, including parameterization (e.g., turbulence closure and stresses at the air-water interface) and external forcings (e.g., ocean conditions and atmospheric forcings).
| Original language | English (US) |
|---|---|
| Pages (from-to) | 935-972 |
| Number of pages | 38 |
| Journal | Continental Shelf Research |
| Volume | 25 |
| Issue number | 7-8 SPEC. ISS. |
| DOIs | |
| State | Published - May 2005 |
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Keywords
- Eulerian-Lagrangian methods
- Finite differences
- Finite volumes
- Mathematical modeling
- Ocean, coastal, and estuarine circulation
- Semi-implicit methods
ASJC Scopus subject areas
- Aquatic Science
- Geology
- Oceanography
Cite this
A cross-scale model for 3D baroclinic circulation in estuary-plume-shelf systems : II. Application to the Columbia River. / Baptista, Antonio; Zhang, Yinglong; Chawla, Arun; Zulauf, Mike; Seaton, Charles; Myers, Edward P.; Kindle, John; Wilkin, Michael; Burla, Michela; Turner, Paul J.
In: Continental Shelf Research, Vol. 25, No. 7-8 SPEC. ISS., 05.2005, p. 935-972.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A cross-scale model for 3D baroclinic circulation in estuary-plume-shelf systems
T2 - II. Application to the Columbia River
AU - Baptista, Antonio
AU - Zhang, Yinglong
AU - Chawla, Arun
AU - Zulauf, Mike
AU - Seaton, Charles
AU - Myers, Edward P.
AU - Kindle, John
AU - Wilkin, Michael
AU - Burla, Michela
AU - Turner, Paul J.
PY - 2005/5
Y1 - 2005/5
N2 - This article is the second of a two-part paper on ELCIRC, an Eulerian-Lagrangian finite difference/finite volume model designed to simulate 3D baroclinic circulation across river-to-ocean scales. In part one (Zhang et al., 2004), we described the formulation of ELCIRC and assessed its baseline numerical skill. Here, we describe the application of ELCIRC within CORIE, a coastal margin observatory for the Columbia River estuary and plume. We first introduce the CORIE modeling system and its multiple modes of simulation, external forcings, observational controls, and automated products. We then focus on the evaluation of highly resolved, year-long ELCIRC simulations, using two variables (water level and salinity) to illustrate simulation quality and sensitivity to modeling choices. We show that, process-wise, simulations capture well important aspects of the response of estuarine and plume circulation to ocean, river, and atmospheric forcings. Quantitatively, water levels are robustly represented, while salinity intrusion and plume dynamics remain challenging. Our analysis highlights the benefits of conducting model evaluations over large time windows (months to years), to avoid significant localized biases. The robustness and computational efficiency of ELCIRC has proved invaluable in identifying and reducing non-algorithmic sources of errors, including parameterization (e.g., turbulence closure and stresses at the air-water interface) and external forcings (e.g., ocean conditions and atmospheric forcings).
AB - This article is the second of a two-part paper on ELCIRC, an Eulerian-Lagrangian finite difference/finite volume model designed to simulate 3D baroclinic circulation across river-to-ocean scales. In part one (Zhang et al., 2004), we described the formulation of ELCIRC and assessed its baseline numerical skill. Here, we describe the application of ELCIRC within CORIE, a coastal margin observatory for the Columbia River estuary and plume. We first introduce the CORIE modeling system and its multiple modes of simulation, external forcings, observational controls, and automated products. We then focus on the evaluation of highly resolved, year-long ELCIRC simulations, using two variables (water level and salinity) to illustrate simulation quality and sensitivity to modeling choices. We show that, process-wise, simulations capture well important aspects of the response of estuarine and plume circulation to ocean, river, and atmospheric forcings. Quantitatively, water levels are robustly represented, while salinity intrusion and plume dynamics remain challenging. Our analysis highlights the benefits of conducting model evaluations over large time windows (months to years), to avoid significant localized biases. The robustness and computational efficiency of ELCIRC has proved invaluable in identifying and reducing non-algorithmic sources of errors, including parameterization (e.g., turbulence closure and stresses at the air-water interface) and external forcings (e.g., ocean conditions and atmospheric forcings).
KW - Eulerian-Lagrangian methods
KW - Finite differences
KW - Finite volumes
KW - Mathematical modeling
KW - Ocean, coastal, and estuarine circulation
KW - Semi-implicit methods
UR - http://www.scopus.com/inward/record.url?scp=20144376461&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=20144376461&partnerID=8YFLogxK
U2 - 10.1016/j.csr.2004.12.003
DO - 10.1016/j.csr.2004.12.003
M3 - Article
VL - 25
SP - 935
EP - 972
JO - Continental Shelf Research
JF - Continental Shelf Research
SN - 0278-4343
IS - 7-8 SPEC. ISS.
ER -