Publications
Highlights
(For a full list of peer-reviewed pubs see below )
We present a well-validated model of the tides in Massachusetts coastal waters and use the model to estimate the maximum theoretical yield of tidal power installations at sites where the energy density exceeds 750 W/m^2.
GW Cowles, A. Hakim, JH Churchill
Renewable Energy, 114A, 215–228 (2017)
This paper is the first chapter of Chang Liu’s PhD thesis. In the paper we present a method for geolocating demersal fish using the Hidden Markov model. The method is validated using known positions of the fish while at large provided by acoustic arrays.
C Liu, GW Cowles, DR Zemeckis, SX Cadrin, MJ Dean
Canadian Journal of Fisheries and Aquatic Sciences, 74, 1862-1877 (2017)
This paper comprised the M.S. thesis research of Chang Liu. We model the dispersal of larval bay scallop in Buzzards Bay using a coupled biophysical model and quantity the connectivity between spawning and settlement regions.
C Liu, GW Cowles, JH Churchill, KDE Stokesbury
Fisheries Oceanography, 24, 364-382 (2015)
This paper comprised the MS thesis research of Ara Hakim. We examine the impact of a hydrokinetic power extraction on sediment transport and long term morphology in Muskeget Channel, MA using a regional tidal model coupled with a subgridscale approach based on linear actuator disk theory to account for removal of momentum by the turbines.
A Hakim, GW Cowles, JH Churchill
Journal of Marine Technology Society, 47, 122-136 (2013).
An adaptive solver for two-dimensional horizontal morphodynamic modeling studies is presented. The method uses a Riemann solver to compute unsteady, two-dimensional flows over arbitrary topography coupled with an Exner equation to model the bed and is implemented in a highly scalable block-structured adaptive mesh refinement framework.
GW Cowles
Journal of Coastal Research, 29, 727-735 (2013)
In this work we study the capabilities of the FVCOM model to resolve circulation on the New England Shelf. Comparisons are made with observations from the Coastal Mixing and Optics and New England Shelf Flux Experiment programs.
GW Cowles, SJ Lentz, C Chen, Q Xu, RC Beardsley
J. of Geophysical Research, 113 (2008)
Diagonal preconditioners for implicit-unsteady and steady discretizations of the shallow water equations at low- and high-Rossby and drag-number limits are analyzed for both subcritical and supercritical flow. The preconditioners are applied to a multigrid-accelerated SUPG solver and demonstrate good convergence over a wide range of conditions.
BT Helenbrook, GW Cowles
J. of Computational Physics, 227, 4425-4440 (2008)
The FVCOM model is parallelized using a single program multiple domain approach. Non-blocking messages are implemented using the Message Passing Interface. The resulting parallelization provides efficient speedup on up to O(1000) cores on distributed memory systems. A program model is constructed and demonstrates that interconnect latency is the key bottleneck to scalability.
GW Cowles
Intl. J. of High Performance Computing Applications, 22, 177-193 (2008)
We provide an overview of open source Finite Volume Community Ocean Model including the numerical methodology, coding approach, model capabilities, as well as several example test cases such as an estuary and the Arctic Ocean.
C Chen, GW Cowles, RC Beardsley
Oceanography, 19, 78-89 (2006)
We present a method for wing shape optimization in incompressible turbulent viscous flow where the gradient is computed using a control-theory based algroithm. The method is validated using inverse test cases for wing and sail shapes.
GW Cowles, L Martinelli
Intl. J. of Computational Fluid Dynamics, 17, 1-16 (2003)
Peer-reviewed Articles and Book Chapters
Movements of Atlantic halibut in the Gulf of Maine based on geolocation
C Liu, C Bank, M Kersula, GW Cowles, DR Zemeckis, SX Cadrin, C McGuire
ICES J. of Marine Science, in press
Positive interspecific associations consistent with social information use shape juvenile fish assemblages
C Haak, F Hui, GW Cowles, A Danylchuk
Ecology, in press
A hardware-accelerated particle filter for the geolocation of demersal fishes
C Liu, GW Cowles, DR Zemeckis, G Fay, A Le Bris, SX Cadrin
Fisheries Research, 213, 160-171 (2019)
Wave and tide-driven flow act on multiple scales to shape the distribution of a juvenile fish (Albula vulpes) in shallow nearshore habitats
CR Haak, GW Cowles, AJ Danylchuk
Limnology and Oceanography, 64, 597-615 (2019)
Hydrodynamic and isotopic niche differentiation between juveniles of two sympatric cryptic bonefishes, Albula vulpes and Albula goreensis
CR Haak, M Power, GW Cowles, AJ Danylchuk
Environmental Biology of Fishes, 102(2), 129-145 (2019)
A three-dimensional circulation model of Lake Bardawil, Egypt
M. Bek, GW Cowles
Book Chapter in Egyptian Coastal lakes and Wetlands Pt 1: Characteristics and Hydrodynamics, Springer (2018)
A comparison of numerical and analytical predictions of the tidal stream power resource of Massachusetts
GW Cowles, A. Hakim, JH Churchill
Renewable Energy, 114A, 215–228 (2017)
Validation of a hidden Markov model for the geolocation of Atlantic cod
C Liu, GW Cowles, DR Zemeckis, SX Cadrin, MJ Dean
Canadian Journal of Fisheries and Aquatic Sciences, 74, 1862-1877 (2017)
Turbulent and numerical mixing in a salt wedge estuary: dependence on grid resolution, bottom roughness, and turbulence closure
DK Ralston, GW Cowles, WR Geyer, RC Holleman
Journal of Geophysical Research, 122 692-712 (2017)
Seasonal movements and connectivity of an Atlantic cod (Gadus morhua) spawning component in the western Gulf of Maine
DR Zemeckis, C Liu, GW Cowles, MJ Dean, W Hoffman, D Martins, SX Cadrin
ICES J. of Marine Science, 74, 1780-1796 (2017)
Modeled transport of winter flounder larvae spawned in coastal waters of the Gulf of Maine
G Decelles, GW Cowles, C Liu, SX Cadrin
Fisheries Oceanography, 24, 430-444 (2015)
Connectivity of the bay scallop (Argopecten irradians) in Buzzards Bay, Massachusetts, U.S.A
C Liu, GW Cowles, JH Churchill, KDE Stokesbury
Fisheries Oceanography, 24, 364-382 (2015)
The impact of tidal stream turbines on circulation and sediment transport in Muskeget Channel, MA
A Hakim, GW Cowles, JH Churchill
Journal of Marine Technology Society, 47, 122-136 (2013).
A block-structured adaptive mesh refinement solver for morphodynamic modeling
GW Cowles
Journal of Coastal Research, 29, 727-735 (2013)
Surficial sediment stability on Georges Bank, in the Great South Channel, and eastern Nantucket Shoals
BP Harris, GW Cowles, KDE Stokesbury
Continental Shelf Research, 49, 65-72. (2012)
Tidal dynamics in the Gulf of Maine and New England Shelf: An application of FVCOM
C Chen, H Huang, RC Beardsley, Q Xu, R Limeburner, GW Cowles, Y Sun, J Qi, H Lin
J. of Geophysical Research, 116 (2011)
Life history and biogeography of Calanus copepods in the Arctic Ocean: An individual-based modeling study
R Ji, C Ashjian, R Cambell, C Chen, G Gao, C Cabis, GW Cowles, RC Beardsley
Progress in Oceanography, 96, 40-56 (2011)
A nonhydrostatic version of FVCOM: 2. Mechanistic Study of tidaly generated nonlinear internal waves in Massachusetts Bay
Z Lai, C Chen, GW Cowles, RC Beardsley
J. of Geophysical Research, 115 (2010)
A nonhydrostatic version of FVCOM: 1. validation experiments
Z Lai, C Chen, GW Cowles, RC Beardsley
J. of Geophysical Research, 115 (2010)
An unstructured-grid finite-volume surface wave model (FVCOM-SWAVE): Implementation, validations, and applications
J Qi, C Chen, RC Beardsley, W Perrie, GW Cowles, Z Lai
Ocean Modelling, 28, 153-166 (2009)
Modeling the connectivity between sea scallop populations in the Middle Atlantic Bight and over Georges Bank
R Tian, C Chen, KDE Stokesbury, BJ Rothschild, GW Cowles, Q Xu, S Hu, BP Harris, M Marino
Marine Ecology Progress Series, 380, 147-160 (2009)
Sensitivity analysis of sea scallop (Placopecten magellanicus) larvae trajectories to hydrodyanmic model configuration on Georges Bank and adjacent coastal regions
R Tian, C Chen, KDE Stokesbury, BJ Rothschild, Q Xu, S Hu, GW Cowles, B Harris, M Marino
Fisheries Oceanography, 18, 173-184 (2009)
Dispersal and settlement of sea scallop larvae spawned in the fishery closed areas on Georges Bank
R Tian, C Chen, KDE Stokesbury, BJ Rothschild, GW Cowles, Q Xu, S Hu, B Harris, M Marino
ICES J. of Marine Science, 66, 2155-2164 (2009)
A new high-resolution unstructured grid finite volume Arctic ocean model (AO-FVCOM): An application for tidal studies
C Chen, G Gao, J Qi, A Proshutinsky, RC Beardsley, Z Kowalik, H Lin, GW Cowles
J. of Geophysical Research, 114 (2009)
Application and comparison of Kalman filters for coastal ocean problems: An application of FVCOM
C Chen, P Malanotte-rizzoli, J Wei, RC Beardsley, Z Lai, P Xue, S Lyu, Q Xu, J. Qi, GW Cowles
J. of Geophysical Research, 114 (2009)
Comparison of observed and model-computed low frequency circulation and hydrography on the New England Shelf
GW Cowles, SJ Lentz, C Chen, Q Xu, RC Beardsley
J. of Geophysical Research, 113 (2008)
Preconditioning for dual-time-stepping simulations of the shallow water equations including Coriolis and bed friction effects
BT Helenbrook, GW Cowles
J. of Computational Physics, 227, 4425-4440 (2008)
Parallelization of the FVCOM coastal ocean model
GW Cowles
Intl. J. of High Performance Computing Applications, 22, 177-193 (2008)
Physical mechanisms for the offshore detachment of the Changjiang diluted water in the East China Sea
C Chen, P Xue, P Ding, RC Beardsley, Q Xu, X Mao, G Gao, J Qi, C Li, H Lin, H., GW Cowles, S Maochong
J. of Geophysical Research, 113 (2008)
Comparisons with ROMS for three idealized barotropic test problems
H Huang, C Chen, GW Cowles, C Winant, RC Beardsley, K Hedstrom, D Haidvogel
J. of Geophysical Research, 113 (2008)
Tidal pumping onto Georges Bank: A process-oriented modeling study
S Hu, D Townsend, C Chen, GW Cowles, RC Beardsley, R Ji, R Houghton
J. of Marine Systems, 74, 528-544 (2008)
Critical issues for modeling studies of Narragansett Bay and Mount Hope Bay
C Chen, L Zhao, GW Cowles, BJ Rothschild
Book Chapter in Science for Ecosystem-based Management, Narragansett Bay in the 21st Century, Springer (2008)
Dispersal modeling of fish early life stages: Sensitivity with application to Atlantic cod in the western Gulf of Maine
M Huret, J Runge, C Chen, GW Cowles, Q Xu, J Pringle
Marine Ecology Progress Series, 347, 261-274 (2007)
A finite volume numerical approach for coastal ocean circulation studies: Comparisons with finite difference models
C Chen, H Huang, RC Beardsley, H Liu, Q Xu, GW Cowles
Journal of Geophysical Research, 112 (2007)
Tidal flushing and eddy shedding in Mount Hope Bay and Narragansett Bay: An application of FVCOM
L Zhao, C Chen, GW Cowles
Journal of Geophysical Research, 111 (2006)
An unstructured grid finite-volume coastal ocean model system
C Chen, GW Cowles, RC Beardsley
Oceanography, 19, 78-89 (2006)
Control-theory based shape design for the incompressible Navier-Stokes equations
GW Cowles, L Martinelli
Intl. J. of Computational Fluid Dynamics, 17, 1-16 (2003)