The authors would like to acknowledge the efforts of Andre van der Westhuysen, Roberto Padilla, and Joseph Sienkiewicz at NCEP for their constructive comments on early drafts of this manuscript.
Ardhuin, F., Herbers T. H. C. , Vledder G. P. V. , Watts K. P. , Jensen R. , and Graber H. C. , 2007: Swell and slanting-fetch effects on wind wave growth. J. Phys. Oceanogr., 37, 908–931.
Ardhuin, F., Chapron B. , and Collard F. , 2009: Observation of swell dissipation across oceans. Geophys. Res. Lett.,36, L06607, doi:10.1029/2008GL037030.
Ardhuin, F., and Coauthors, 2010: Semiempirical dissipation source functions for ocean waves. Part I: Definition, calibration, and validation. J. Phys. Oceanogr., 40, 1917–1941.
Ardhuin, F., Tournadre J. , Queffeulou P. , Girard-Ardhuin F. , and Collard F. , 2011: Observation and parametrization of small icebergs: Drifting breakwaters in the Southern Ocean. Ocean Modell., 39, 405–410.
Banner, M. L., and Song J.-B. , 2002: On determining the onset and strength of breaking for deep water waves. Part II: Influence of wind forcing and surface shear. J. Phys. Oceanogr., 32, 2559–2570.
Banner, M. L., and Peirson W. L. , 2007: Wave breaking onset and strength for two-dimensional deep water wave groups. J. Fluid Mech., 585, 93–115.
Banner, M. L., Babanin A. V. , and Young I. R. , 2000: Breaking probability for dominant waves on the sea surface. J. Phys. Oceanogr., 30, 3145–3160.
Battjes, J. A., and Janssen J. P. F. M. , 1978: Energy loss and set-up due to breaking of random waves. Proc. 16th Int. Conf. in Coastal Engineering, Hamburg, Germany, American Society of Civil Engineers, 569–587.
Bidlot, J., Abdalla S. , and Janssen P. , 2005: A revised formulation for ocean wave dissipation in Cy25r1. ECMWF Tech. Rep. R60.9/JB/0516, 35 pp.
Bidlot, J., Janssen P. , and Abdalla S. , 2007a: A revised formulation of ocean wave dissipation and its model impact. ECMWF Tech. Rep. 509, 29 pp.
Bidlot, J., and Coauthors, 2007b: Inter-comparison of operational wave forecasting systems. 10th Int. Workshop on Wave Hindcasting and Forecasting, Oahu, HI, U.S. Army Engineer Research and Development Center/Coastal and Hydraulics Laboratory, 1–22.
Booij, N., and Holthuijsen L. H. , 1987: Propagation of ocean waves in discrete spectral wave models. J. Comput. Phys., 68, 307–326.
Caplan, P., Derber J. , Gemmill W. , Hong S.-Y. , Pan H.-L. , and Parrish D. , 1997: Changes to the 1995 NCEP operational Medium-Range Forecast model analysis–forecast system. Wea. Forecasting, 12, 581–594.
Cavaleri, L., and Malanotte-Rizzoli P. , 1981: Wind wave prediction in shallow water: Theory and applications. J. Geophys. Res., 86 (C11), 10 961–10 973.
Chao, Y. Y., Burroughs L. D. , and Tolman H. L. , 2003a: Wave forecasting for Alaskan waters. NWS Tech. Procedures Bull. 496, 10 pp.
Chao, Y. Y., Burroughs L. D. , and Tolman H. L. , 2003b: Wave forecasting for the eastern North Pacific and adjacent waters. NWS Tech. Procedures Bull. 491, NWS/NCEP, 11 pp.
Chao, Y. Y., Burroughs L. D. , and Tolman H. L. , 2003c: Wave forecasting for the western North Atlantic Ocean and adjacent waters. NWS Tech. Procedures Bull. 459, NWS/NCEP, 11 pp.
Chawla, A., and Tolman H. L. , 2007: Automated grid generation for WAVEWATCH III. NWS Tech. Note 254, 71 pp.
Derber, J. C., Parrish D. F. , and Lord S. J. , 1991: The new global operational analysis system at the National Meteorological Center. Wea. Forecasting, 6, 538–547.
Grumbine, R. W., 1996: Automated passive microwave sea ice concentration analysis at NCEP. NWS Tech. Note 120, 13 pp.
Hanson, J. L., and Jensen R. E. , 2004: Wave system diagnostics for numerical wave models. Eighth Int. Workshop on Wave Hindcasting and Forecasting, Oahu, HI, Joint WMO–IOC Technical Commission for Oceanography and Marine Meteorology Tech. Rep. 29. [Available online at ftp://ftp.wmo.int/Documents/PublicWeb/amp/mmop/documents/JCOMM-TR/J-TR-29-WH8/Papers/E3.pdf.]
Hanson, J. L., Tracy B. A. , Tolman H. L. , and Scott R. D. , 2009: Pacific hindcast performance of three numerical wave models. J. Atmos. Oceanic Technol., 26, 1614–1633.
Hersbach, H., and Bidlot J.-R. , 2009: The relevance of ocean surface current in the ECMWF analysis and forecast system. Proc. Workshop on Ocean–Atmosphere Interactions, Reading, United Kingdom, ECMWF, 61–73.
Janssen, P. A. E. M., 1991: Quasi-linear theory of wind wave generation applied to wave forecasting. J. Phys. Oceanogr., 21, 1631–1642.
Kanamitsu, M., and Coauthors, 1991: Recent changes implemented into the global forecast system at NMC. Wea. Forecasting, 6, 425–435.
Luettich, R. A., Westerink J. , and Scheffner N. , 1992: ADCIRC: An advanced three-dimensional circulation model for shelves coasts and estuaries. Report 1: Theory and methodology of ADCIRC-2DDI and ADCIRC-3DL. Dredging Research Program Tech. Rep. DRP-92-6, U.S. Army Engineers Waterways Experiment Station, 137 pp.
NOAA/NGDC, cited 2007: ETOPO2v2 global gridded 2-minute database. National Oceanic and Atmospheric Administration/National Geophysical Data Center. [Available online at http://www.ngdc.noaa.gov/mgg/global/etopo2.html.]
Reynolds, R. W., and Smith T. M. , 1994: Improved global sea surface temperature analyses, using optimum interpolation. J. Climate, 7, 929–948.
Rogers, W. E., 2002: The U.S. Navy's global wind-wave models: An investigation into sources of errors in low-frequency energy predictions. Ocean Dynamics and Prediction Branch Tech. Rep. NRL/FR/7320-02-10,035, Naval Research Laboratory, 64 pp.
Song, J.-B., and Banner M. L. , 2002: On determining the onset and strength of breaking for deep water waves. Part I: Unforced irrotational wave groups. J. Phys. Oceanogr., 32, 2541–2558.
Tolman, H. L., 1992: Effects of numerics on the physics in a third-generation wind-wave model. J. Phys. Oceanogr., 22, 1095–1111.
Tolman, H. L., 2002b: Testing of WAVEWATCH III version 2.22 in NCEP's NWW3 ocean wave model suite. NWS Tech. Note 214, 99 pp.
Tolman, H. L., 2002c: User manual and system documentation of WAVEWATCH III version 2.22. NWS Tech. Note 222, 133 pp.
Tolman, H. L., 2002d: Validation of WAVEWATCH III version 1.15 for a global domain. NWS Tech. Note 213, 33 pp.
Tolman, H. L., 2007: Development of a multi-grid version of WAVEWATCH III. NOAA/NWS/NCEP/MMAB Tech. Note 256, 88 pp.
Tolman, H. L., 2009: User manual and documentation of WAVEWATCH III version 3.14. NOAA/NWS/NCEP/MMAB Tech. Note 276, 219 pp.
Tolman, H. L., Balasubramaniyan B. , Burroughs L. D. , Chalikov D. V. , Chao Y. Y. , Chen H. S. , and Gerald V. M. , 2002: Development and implementation of wind-generated ocean surface wave models at NCEP. Wea. Forecasting, 17, 311–333.
Tolman, H. L., Cao D. , and Gerald V. M. , 2006: Altimeter data for use in wave models at NCEP. NWS Tech. Rep. 252, 49 pp.
Tolman, H. L., Banner M. L. , and Kaihatu J. M. , 2011: The NOPP operational wave model improvement project. 12th Int. Workshop on Wave Hindcasting and Forecasting/3rd Coastal Hazards Symp., Waikoloa, HI, Environment Canada–U.S. Army Engineer Research and Development Center's Coastal and Hydraulics Laboratory, I12.
Vincent, L., and Soille P. , 1991: Watersheds in digital spaces: An efficient algorithm based on immersion simulations. IEEE Trans. Pattern Anal. Mach. Intell., 13, 583–598.
Wessel, P., and Smith W. , 1996: A global, self-consistent, hierarchical, high-resolution shoreline database. J. Geophys. Res., 101 (B4), 8741–8743.
Young, I. R., and Babanin A. V. , 2006: Spectral distribution of energy dissipation of wind-generated waves due to dominant wave breaking. J. Phys. Oceanogr., 36, 376–394.
All output products generated by the operational wave model are identified as NOAA WAVEWATCH III, which is a registered trademark of NOAA.
Since buoy data do not provide a true 2D spectrum, directional information when available is only used for mean direction in this paper.
Our thanks to the reviewers for bringing this to our attention.