[Column]

ALBERT J. HERMANN

PMEL / JISAO 

Overview of Recent Work [Bar]


I work with other physical oceanographers and biologists on models of circulation, plankton and fish dynamics in the Gulf of Alaska and the Bering Sea, as part of the Fisheries Oceanography Coordinated Investigations (FOCI), the Southeast Bering Sea Carrying Capacity (SEBSCC) program, the Northeast Pacific GLOBEC program, the Fisheries and the Environment (FATE) program, and Sea Lion initiatives. Other recent work centers on low-cost stereo virtual reality techniques, supported by NOAA-High Performance Computing and Communications (HPCC). 

Here are some web pages which summarize our work: 

  • A short movie loop of recent modeling results
  • A somewhat dated general overview of some biophysical models and their coupling, circa 1996.  
  • Modeling efforts for the wider Coastal Gulf of Alaska (GLOBEC) (with animations), and a paper describing our findings.
  • Recent nested models of the North Pacific, to address GLOBEC, Sea Lion, and Bering Sea issues.
  • A Live Access Server providing interactive access to nested model output for the Northeast Pacific.
  • A multiyear index of flow through Shelikof Strait, derived from numerical model output, and a description of the Live Access Server.
  • Modeling activities for the Southeastern Bering Sea (SEBSCC) (with animations and virtual reality),and a paper describing our findings.
  • A report to the North Pacific Research Board on Evaluation of ocean circulation models for the Bering Sea and Aleutian Islands.
  • Modeling results for the Northern Gulf of Alaska (FOCI) (with animations of salinity field), and a presentation on eddy statistics.
  • A spawning experiment for FOCI using coupled biophysical models (with animations). 
  • A paper which describes methods of physical-biological coupling
  • An extended abstract (circa 1996) describing an early approach to boundary conditions for a regional model which includes tidal and subtidal flows. Note: this has been superseded by one-way nesting with the Regional Ocean Modeling System (ROMS)
  • Low-cost stereo virtual reality for oceanography (what you can do with two eyes, a PC, and a few hundred dollars - or, for a bit more, what you can do with two projectors and polarized lenses)
  • Low-cost immersive teleconferencing for collaborative science (how to confer with your colleagues in 3D using the Personal Access Grid and multiple webcams)

    • Virtual Reality [Bar]

    A 4D representation of some of our indiviual-based fish (pollock) model results for various years. The model is centered near Kodiak Island, AK. In the above frame Kodiak Island is on the right and Alaska is to the left; we are looking northeast into Shelikof Strait. These are animated VRML worlds which *should* run on most PC and Mac web browsers (if not try installing the Cortona Viewer). Fish are represented as spheres which move through time, with modeled seafloor bathymetry rendered as a 3D surface. Click on the above frame to open this world. Here also are some representative fish worlds (in black and white)  for   1978 1987 1988 1991 1994

    Also check out our animations of salinity fields for these years, which highlight eddies in this region.
     
     

    Other Sample Movies

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    Pollock Movement
    Click the image to the left to view a quick sample movie of our individual-based biophysical modeling for FOCI. The moving black dots are representative fish (walleye pollock, Theragra chalcogramma), superimposed on the evolving salinity field for 1989 near Kodiak Island, Alaska. We performed these simulations on the CRAY Y-MP at the Arctic Region Supercomputing Center .     		 [Pollock Movie]
    Pollock Size
    Another movie of pollock size for 1987 illustrates positions of fish after hatching, with length of individuals (in mm) coded by color. Note how some fish get entrained in eddy features, which limit their dispersion.     		 [Another Pollock Movie]

    These are short animated gifs. We have experimented with other formats but these are *guaranteed* to run on any web browser
     

    Selected Publications

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    Submitted/ in review

    Hermann, A.J., E.N. Curchitser, E.L. Dobbins and D.B. Haidvogel. 2007. A comparison of remote versus local influence of El Nino on the coastal circulation of the Northeast Pacific. Deep Sea Research II., sub judice. 

    Hermann, A.J., S. Hinckley, E.L. Dobbins, D.B. Haidvogel and C. Mordy. 2007. Quantifying cross-shelf and vertical nutrient flux in the Gulf of Alaska with a spatially nested, coupled biophysical model. Deep Sea Research II, sub judice. 

    Bond, N.A., A. J. Hermann, R.C. Steed, E. Dobbins, and W. Cheng. 2007. Using a mesoscale numerical weather prediction model to estimate the local forcing of the Alaska Coastal Current (ACC). Deep Sea Research II, sub judice. 

    Dobbins, E.L., A. J. Hermann, P. J. Stabeno. 2007. Modeled transport of freshwater from a line-source in the coastal Gulf of Alaska. Deep Sea Research II, sub judice. 

    Hinckley, S., K. O. Coyle, G. Gibson, A. J. Hermann, and E. L. Dobbins. 2007. A biophysical NPZ model with iron for the Gulf of Alaska: Reproducing the differences between an oceanic HNLC ecosystem and a classical northern temperate shelf ecosystem. Deep Sea Research II, sub judice. 

    Hinckley, S., J.M. Napp, and A.J. Hermann. 2007. Simulation of physically-mediated variability in prey resources for a larval fish - a 3-dimensional NPZ model Fisheries Oceanography, in revision.  

    Published/ in press

    Haidvogel, D. B., H. Arango, W. P. Budgell, B. D. Cornuelle, E. Curchitser, E. Di Lorenzo, K. Fennel, W. R. Geyer, A. J. Hermann, L. Lanerolle, J. Levin, J. C. McWilliams, A. J. Miller, A. M. Moore,T. M. Powell, A. F. Shchepetkin, C. R. Sherwood, R. P. Signell, John C. Warner, J. Wilkin. 2007. Regional Ocean Forecasting in Terrain-following Coordinates: Model Formulation and Skill Assessment. Journal of Computational Physics, in press. 

    Williams, W., T. Weingartner, and A. Hermann. 2007. Idealized Modeling of Seasonal Variation in the Alaska Coastal Current, J. Geophys. Res. 112, C07001, doi:10.1029/2005JC003285.

    Hermann, A. J. and C. W. Moore. 2007 Visualization in fisheries oceanography: new approaches for the rapid exploration of coastal ecosystems. In: B. Megrey and E. Moksness, eds. Computers in Fisheries Research (Second Edition), in press. 

    Stockhausen, W.T., and A.J. Hermann. 2007. Modeling larval dispersion of rockfish: A tool for marine reserve design? In: J. Heifetz, J. DiCosimo, A.J. Gharrett, M.S. Love, T. O'Connell, and R. Stanley (eds.), Biology, assessment, and management of North Pacific rockfishes. Alaska Sea Grant College Program, University of Alaska Fairbanks. AK-SG-07-01.  

    Curchitser, E. N., D. B. Haidvogel, A. J. Hermann, E. L. Dobbins and T. M. Powell. 2005. Multi-scale modeling of the North Pacific Ocean I: Assessment and analysis of simulated basin-scale variability (1996-2003). J. Geophys. Res., 110, C11021, doi:101029/2005JC002902.  

    Powell, T. M., C.V. W. Lewis, E. Curchitser, D. Haidvogel, A. Hermann, and E. Dobbins. 2005. Results from a three-dimensional, nested biological-physical model of the California Current System: Comparisons with Statistics from Satellite Imagery. J. Geophys. Res., 111, C07018, doi:10.1029/2004JC002506.  

    Stabeno, P. J., N. A. Bond, A. J. Hermann, C. W. Mordy and J. E. Overland. 2004. Meteorology and Oceanography of the Northern Gulf of Alaska. Prog. Oceanog. 24: 859-897.  

    Hermann, A.J., D. B. Haidvogel, E. L. Dobbins, and P. J. Stabeno. 2002. Coupling Global and Regional Circulation Models in the Coastal Gulf of Alaska .   Prog. Oceanog. 53: 335-367.  

    Hermann, A.J., P. J. Stabeno, D. B. Haidvogel, D. L. Musgrave. 2002. A regional tidal/subtidal circulation model of the southeastern Bering Sea: Development, sensitivity analyses and hindcasting. Deep-Sea Res. II (Topical Studies in Oceanography) 49: 5495-5967. 

    Hermann, A.J., S. Hinckley, B.A Megrey and J.M. Napp. 2001. Applied and theoretical considerations for constructing spatially explicit Individual-Based Models of marine fish early life history which include multiple trophic levels. ICES J. Mar. Sci. 58: 1030-1041. 

    Hinckley, S., Hermann, A. J., Meir, K. L. and B. A. Megrey. 2001. The importance of spawning location and timing to successful transport to nursery areas: a simulation modeling study of Gulf of Alaska walleye pollock. ICES J. Mar. Sci. 58:1042-1052. 

    Hermann, A. J. and P. J. Stabeno. 1996. An eddy resolving model of circulation on the western Gulf of Alaska shelf. I. Model development and sensitivity analyses. J. Geophys. Res. 101: 1129-1149. 

    Stabeno. P. J. and A. J. Hermann. 1996. An eddy resolving model of circulation on the western Gulf of Alaska shelf. II. Comparison of results to oceanic observations. J. Geophys. Res. 101: 1151-1161. 

    Hermann, A. J., S. Hinckley, B. A. Megrey and P. J. Stabeno. 1996. Interannual variability of the early life history of walleye pollock near Shelikof Strait, as inferred from a spatially explicit, individual-based model.Fish. Oceanogr. 5 (Suppl. 1): 39-57. 

    Hinckley, S., A. J. Hermann and B. A. Megrey. 1996. Development of a spatially explicit, individual-based model of marine fish early life history. Mar. Ecol. Prog. Ser. 139: 47-68. 

    Stabeno, P. J., A. J. Hermann, N. A. Bond and S. J. Bograd. 1995. Modeling the possible impact of climate change on the survival of larval walleye pollock (Theragra chalcogramma) in the Gulf of Alaska. Can. Spec. Pub. Fish. Aquat. Sci. 121: 719-727. 

    Kemp, W. M., W. R. Boynton and A. J. Hermann. 1995. Simulation models of an estuarine macrophyte ecosystem. In: B. Patten and S. Jorgensen, eds., Complex Ecology: The Part-Whole Relation in Ecosystems, Prentice-Hall. 

    Hermann, A. J. and W. B. Owens. 1993. Energetics of gravitational adjustment for mesoscale chimneys. Journal of Physical Oceanography 23: 346-371. 

    Hermann, A. J. and H. M. Hsu. 1993. A vertical coordinate mapping technique for semi-spectral primitive equation models of oceanic circulation. Journal of Atmospheric and Oceanic Technology 10: 381-396. 

    Hermann, A. J., P. B. Rhines and E. R. Johnson. 1989. Nonlinear Rossby adjustment in a channel: beyond Kelvin waves. J. Fluid Mech. 205:469 - 502. 

    Hermann, A. J., B. M. Hickey, M. L. Landry and D. F. Winter. 1989. Coastal Upwelling Dynamics. In: B. M. Hickey and M. R. Landry, eds., Coastal Oceanography of Washington and Oregon, Elsevier Publishers. 

     
     

    Contact Information

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    Phone: (206) 526-6495
    FAX: (206) 526-6485
    e-mail: Albert.J.Hermann@noaa.gov

    snail mail address:
    NOAA/PMEL
    7600 Sand Point Way NE, Bldg.3
    Seattle, WA, 98115-0070, USA


    Contents last updated 
    http://www.pmel.noaa.gov/~hermann