SELECTED PUBLICATIONS
2021 - 2030
Identifying higher-order interactions in wave time-series
Ewans, K., M. Christou, S. Ilic, and P. Jonathan, 2021, J. Offshore Mech. Arct. Eng., 143(2):021201. doi: https://doi.org/10.1115/1.4047930
Optimal methods for estimating the JONSWAP spectrum peak enhancement factor from measured and hindcast wave data
Ewans, K., and J. McConochie, 2021, J. Offshore Mech. Arct. Eng., 143(2):021202. doi: https://doi.org/10.1115/1.4047931
2011 - 2020
Extreme Conditions
Ewans, K., and P. Jonathan, 2020, In book: Ocean Wave Dynamics. https://doi.org/10.1142/9789811208676_0007.
The effect of swell on wave spectra of extreme sea states offshore Sarawak, Malaysia
Amurol, S., and Ewans, K., 2019, Ocean Engineering, 189, https://doi.org/10.1016/j.oceaneng.2019.106288.
A spectral description for extreme sea states offshore Denmark: Part I Power spectral density function
Ewans, K., Hansen, H., and A. R. Zeeberg, 2019, 2nd International Workshop on Waves, Storm Surges, and Coastal Hazards. Melbourne, Australia, Nov. 10-15.
A spectral description for extreme sea states offshore Denmark: Part II Directional spreading function
Ewans, K., Hansen, H., and A. R. Zeeberg, 2019, 2nd International Workshop on Waves, Storm Surges, and Coastal Hazards. Melbourne, Australia, Nov. 10-15.
Waves and Swells in High Wind and Extreme Fetches, Measurements in the Southern Ocean
Babanin, A.V., Rogers, W.E., de Camargo, R., Doble, M., Durrant, T., Filchuk, K., Ewans, K., Hemer, M., Janssen, T., Kelly-Gerreyn, B., Machutchon, K., McComb, P., Qiao, F., Schulz, E., Skvortsov, A., Thomson, J., Vichi, M., Violante-Carvalho, N., Wang, D., Waseda, T., Williams, G., and I Young, Front. Mar. Sci., 09 July 2019. https://doi.org/10.3389/fmars.2019.00361.
On the uncertainties of estimating JONSWAP spectrum peak parameters
Ewans, K., and J. McConochie, 2018, 37th International Conference on Offshore Mechanics and Arctic Engineering, OMAE2018-78386, Madrid, Spain, Jun. 17-22.
Wave buoy performance in short and long waves, evaluated using tests on a Hexapod
Van Essen, S, Ewans, K., and J. McConochie, 2018, 37th International Conference on Offshore Mechanics and Arctic Engineering, OMAE2018-77092, Madrid, Spain, Jun. 17-22.
Estimating storm surge and reservoir subsidence of offshore platforms using WaveRadar REX (SAAB) sensors
Anokhin, V., and K. Ewans, 2018, Proc. OTC-Asia, TC-18OTCA-P-1248-OTC-MS, Kuala Lumpur, Malaysia, Mar. 20-23.
Efficient estimation of return value distributions from non-stationary marginal extreme value models using Bayesian inference
Ross, E., Randell, D., Ewans, K., Feld, G., and P. Jonathan, 2017, Ocean Engineering, 142, 315-328.
Directional analysis and potential for spectral modelling of infragravity waves
Nose, T, Babanin, A., and K. Ewans, 2016, 35th International Conference on Offshore Mechanics and Arctic Engineering, OMAE2016-54282, Busan, South Korea, Jun. 9-24.
Non-stationary estimation of joint design criteria with a multivariate conditional extremes approach
Raghupathi, L., Randell, D., Ewans, K., and P. Jonathan, 2016, 35th International Conference on Offshore Mechanics and Arctic Engineering, OMAE2016-54355, Busan, South Korea, Jun. 9-24.
Multi-dimensional predictive analytics for risk estimation of extreme events
Raghupathi, L., Randell, D., Ross, E., Ewans, K., and P. Jonathan, 2016, 23rd IEEE International Conference on High Performance Computing, Data, and Analytics. Dec. 19-22, 2016. Hyderabad, India.
Statistics of extreme ocean environments: Non-stationary inference for directionality and other covariate effects
Jones, M., Randell, D., Ewans, K., and P. Jonathan, 2016, Ocean Engineering, 119, 30-46.
On the distribution of wave height in shallow water
Wu, Y., Randell, D., Christou, M., Ewans, K., and P. Jonathan, 2016, Coastal Engineering, 111, 39-49.
Fast computation of large scale marginal extremes with multi-dimensional covariates
Raghupathi, L., Randell, D., Ewans, K., and P. Jonathan, 2016, Computational Statistics and Data Analysis, 95, 243–258.
Effect of short-crestedness on extreme wave impact – a summary of findings from the joint industry project “ShortCrest”
Hennig, J., Scharnke, J., Swan, C., Hagen, Ø, Ewans, K., Tromans, P., and G. Forristall, 2015, Proceedings of the ASME 34th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2015-41167, May 31 – June 5, 2015, St. John’s, NL, Canada.
Safe offloading from floating LNG platforms
Guedes Soares, C., Eatock Taylor, R., and K. Ewans, 2015, Applied Ocean Research, 51, 252–254.
Availability of offloading from an LNG barge
Ewans, K.C., and P. Jameson, 2015, Applied Ocean Research, 51, 268-278.
A wavelet-based test for swell stationarity
Ewans, K.C., 2015, Applied Ocean Research, 51, 255-267.
Distributions of return values for ocean wave characteristics in the South China Sea using directional–seasonal extreme value analysis
Randell, D., Feld, G., Ewans, K., and P. Jonathan, 2015, Environmetrics, DOI: 10.1002/env.2350.
Estimation of storm peak and intra-storm directional-seasonal design conditions in the North Sea
Feld, G., Randell, D., Wu, Y., Ewans, K., and P. Jonathan, 2015, Journal Offshore Mechanics and Arctic Engineering, January.
On the estimation of ocean engineering design contours
Jonathan, P., Ewans, K.C., and J Flynn, 2014, J. Offshore Mechanics Arctic Engineering, 136, 041101-1 – 041101-8, November.
Field Measurements of Rogue Water Waves
Christou, M., and K. Ewans, 2014, Journal of Physical Oceanography, September, 2317-2335.
On wave radar measurement
Ewans, K.C., Feld, G., and P. Jonathan, Ocean Dynamics, 2014, DOI:10.1007/s10236-014-0742-5.
Some uncertainties associated with wind and wave description and their importance for engineering applications
Bitner-Gregersen, E.M., Ewans, K.C., and M.C. Johnson, 2014, Ocean Engineering, 86, 11–25.
Short-term variability of wind measurements in South China Sea
Muyau, J., Ewans, K.C., and P. Jonathan, 2014, Proc. OTC-Asia, OTC-24904, Kuala Lumpur, Malaysia, Mar. 26-28.
Measured wave spectra offshore Sabah & Sarawak, Malaysia
Amurol, S., Ewans, K.C., and R. Sheikh, 2014, Proc. OTC-Asia, OTC-224925, Kuala Lumpur, Malaysia, Mar. 26-28.
Recent advances in the analysis of extreme metocean events
Ewans, K.C., and P. Jonathan, 2014, Proc. OTC-Asia, OTC-25026, Kuala Lumpur, Malaysia, Mar. 26-28.
Wave instability in finite depths
Babanin, A.V., and K. Ewans, 2014, 33rd International Conference on Offshore Mechanics and Arctic Engineering, San Francisco, USA, Jun. 8-13.
Recent developments of ocean environmental description with focus on uncertainties
Bitner-Gregersen, E.M., Bhattacharya, S.K., Chatjigeorgiou, I.K., Eames, I., Ellermann, K., Ewans, K., Hermanski, G., Johnson, M.C., Ma, N., Maisondieu, C., Nilva, A., Rychlik, I., and T. Waseda, 2014, Ocean Engineering, 86, 26–46.
Omnidirectional return values for storm severity from directional extreme value models: the effect of environment and sample size
Randell, D., Zanini, E., Vogel, M., Ewans, K., and P. Jonathan, 2014, 33rd International Conference on Offshore Mechanics and Arctic Engineering, San Francisco, USA, Jun. 8-13.
Estimation of storm peak and intra-storm directional-seasonal design conditions in the North Sea
Feld, G., Randell, D., Wu, Y., Ewans, K., and P. Jonathan, 2014, Journal of Offshore Mechanics and Arctic Engineering, 137, 021102-1-021102-15.
Return level estimation from non-stationary spatial data exhibiting multidimensional covariate effects
Jonathan, P., Randell, D., Wu, Y., and K. Ewans, 2014, Ocean Engineering, 88, 520–532.
Non-stationary conditional extremes of northern North Sea storm characteristics
Jonathan, P., Ewans, K., and D. Randell, 2014, Environmetrics, DOI: 10.1002/env.2262.
Multidimensional covariate effects in spatial and joint extremes
Jonathan, P., Ewans, K., and D. Randell, 2013, 13th International Workshop on Wave Hindcasting & Forecasting and 4th Coastal Hazards Symposium, Banff, Alberta, Canada, October 27 – November 1, 2013
Statistical modelling of extreme ocean environments with implications for marine design: a review
Jonathan, P., and K. C. Ewans, 2013, Ocean Engineering, 62, 91-109.
The West Africa Swell Project
Forristall, G.Z., Ewans, K., Olagnon, M., and M. Prevosto, 2013, Proc. 32nd Int. Conf. of the OMAE, Nantes, France, Jun. 9-14.
Response sensitivity to swell spectra off West Africa
Ewans, K., Forristall, G.Z., Prevosto, M., and M. Olagnon, 2013, Proc. 32nd Int. Conf. of the OMAE, Nantes, France, Jun. 9-14.
West Africa swell spectral shapes
Olagnon, M., Ewans, K., Forristall, G.Z., and M. Prevosto, 2013, Proc. 32nd Int. Conf. of the OMAE, Nantes, France, Jun. 9-14.
Swell genesis, modelling and measurements in West Africa
Prevosto, M., Ewans, K., Forristall, G.Z., and M. Olagnon, 2013, Proc. 32nd Int. Conf. of the OMAE, Nantes, France, Jun. 9-14.
A Monte Carlo approach for estimating extreme currents in the Singapore Straits
Jones, O., Ewans, K., and S. Chuah, 2013, Proc. 32nd Int. Conf. of the OMAE, Nantes, France, Jun. 9-14.
Modelling covariate effects in extremes of storm severity on the Australian north west shelf
Randell, D., Wu, Y., Jonathan, P., and K. Ewans, 2013, Proc. 32nd Int. Conf. of the OMAE, Nantes, France, Jun. 9-14.
Joint modelling of extreme ocean environments incorporating covariate effects
Jonathan, P., Ewans, K., and D. Randell, 2013, Coastal Engineering, 79 22–31.
Evaluating environmental joint extremes for the offshore industry using the conditional extremes model
Ewans, K., and P. Jonathan, 2013, Journal of Marine Systems.
Uncertainty due to choice of measurement scale in extreme value modelling of North Sea storm severity
Reeve, D.T., Randell, D., Ewans, K.C., and P. Jonathan, 2012, Ocean Engineering, 53 164–176.
Metocean Data and Models for Application in the Offshore Industry
Ewans, K.C, 2012, In: Guedes Soares C, editor. Marine technology and engineering: CENTEC anniversary book, vol. 1. CRC Press.
Joint modelling of vertical profiles of large ocean currents
Jonathan, P., Ewans, K., and J. Flynn, 2012, Ocean Engineering, 42.
New insights in extreme crest height distributions (a summary of the ‘CREST’ JIP)
Buchner, B., Forristall, G., Ewans, K., Christou, M., and J. Hennig, 2011, Proceedings of OOAE2011 30th International Conference on Ocean, Offshore and Arctic Engineering. 19 – 24 June, Rotterdam, The Netherlands.
Examining a comprehensive data set containing thousands of freak wave events. Part 1 – description of the data and quality control procedure
Christou, M., and K. C. Ewans, 2011, Proceedings of OOAE2011 30th International Conference on Ocean, Offshore and Arctic Engineering. 19 – 24 June, Rotterdam, The Netherlands.
Examining a comprehensive data set containing thousands of freak wave events. Part 2 – analysis and findings
Christou, M., and K. C. Ewans, 2011 Proceedings of OOAE2011 30th International Conference on Ocean, Offshore and Arctic Engineering. 19 – 24 June, Rotterdam, The Netherlands.
Analysis of shallow water wave measurements recorded at the field research facility
Christou, M., Rijnsdorp, D., and K. Ewans, 2011, 12th International Workshop on Wave Hindcasting & Forecasting. Waikoloa, Hawaii, November.
Accommodating measurement scale uncertainty in extreme value analysis of northern North Sea storm severity
Wu, Y., Randell, D., Reeve, D., Jonathan, P., and K. Ewans, 2011, Environmental Risk and Extreme Events, Ascona, Switzerland, Jul. 10-15.
Conditional extremes with covariates
Jonathan, P., Ewans, K., and D. Randell, 2011, The 7th Conference on Extreme Value Analysis, Probabilistic and Statistical Models and their Applications, Lyon, Jun. 27- Jul. 1.
On the estimation of ocean engineering design contours
Jonathan, P., Ewans, K., and J. Flynn, 2011, 30th International Conference on Offshore Mechanics and Arctic Engineering, Rotterdam, The Netherlands, Jun. 19-23.
Modelling the seasonality of extreme waves in the Gulf of Mexico
Jonathan, P., and K. Ewans, J. 2011, Offshore Mechanics and Arctic Engineering, 133, Article 021104.
A spatio-directional model for extreme waves in the Gulf of Mexico
Jonathan, P., and K. Ewans, 2011, J. Offshore Mechanics and Arctic Engineering, 133, Article 011601.
2001 - 2010
The spatial evolution of the spectral characteristics of the Draupner New Year Wave
Christou, M., Ewans, K., Clauss, G., and M. Klein, 2010, OMAE2010 29th International Conference on Offshore Mechanics and Arctic Engineering, 7 –11 June, Shanghai, China.
Detection of changes in the characteristics of oceanographic time-series using changepoint analysis
Killick, R., Eckley, I., Ewans, K., and P. Jonathan, 2010, Ocean Engineering, 37 (13), 1120-1126.
Joint modelling of wave spectral parameters for extreme sea states
Jonathan, P., Flynn, J., and K. Ewans, 2010, Ocean Engineering, 37 (1070), 1080.
Estimation of infragravity waves at intermediate water depth
Reniers, A.J.H.M., Groenewegen, M.J., Ewans, K.C., Masterton, S., Stelling, G.S., and J. Meek, 2010, Coastal Engineering, 57, 52-61.
Second-order crest statistics of realistic sea states
Christou, M., Tromans, P., Vanderschuren, L. and K. Ewans, 2009, In Proceedings of the 11th International Workshop on Wave Hindcasting and Forecasting, Halifax, Canada.
Environment
Bitner-Gregersen, E.M., Ellermann, K, Ewans, K.C., Falzarano, J.M., Johnson, M.C., Nielsen, U.D, Nilva, A., Queffeulou, P., Smith, T.W.P., and T Waseda, 2009, 17th International Ship and Offshore Structures Congress, 16-21 August, Seoul, Korea.
Spectral characteristics of an extreme crest measured in a laboratory basin
Christou, M., Ewans, K., Buchner, B., and C. Swan, 2008, In Rogue Waves Workshop. Brest, France.
Statistical estimation of extreme ocean environments: The requirement for modelling directionality and other covariate effects
Jonathan, P., Ewans, K.C., and G. Z. Forristall, 2008, Ocean Engineering, 35, 1211-1225.
The effect of directionality on Northern North Sea extreme wave design criteria
Ewans, K.C., and P. Jonathan, 2008, J. Offshore Mechanics and Arctic Engineering, 130 (4), 10.
Characteristics of the infragravity wave climate
Masterton, S., and K. C. Ewans, 2008, 27th International Conference on Offshore Mechanics and Arctic Engineering, 15-20 June, Estoril, Portugal (OMAE2008-57648).
The second order statistics of high waves in sea and swell
Tromans, P., Vanderschuren, L., and K.C. Ewans, 2008, J. Off. Mech. Arc. Eng., 130, Nov.
A generic method to model frequency-direction waves spectra for FPSO motions
Van Zutphen, H., Jonathan, P., and K.C. Ewans, 2008, 27th International Conference on Offshore Mechanics and Arctic Engineering, 15-20 June, Estoril, Portugal (OMAE2008-57131).
The effect of directionality on extreme wave design
Jonathan, P., and K.C. Ewans, 2007, The effect of directionality on extreme wave design, Ocean Engineering, 34, 1977-1994.
Uncertainties in extreme wave height estimates for hurricane-dominated regions
Jonathan, P., and K.C. Ewans, 2007, J. Offshore Mechanics and Arctic Engineering, 129, 300-305.
Estimating extreme wave design criteria incorporating directionality
Ewans, K.C, and P. Jonathan, 2006, 9th International Workshop on Wave Hindcasting & Forecasting. Victoria, B.C. Canada, September 24-29.
Uncertainties in extreme value analysis and their effect on load factors
Rutten, J.G., van Gelder, P.H.A.J.M., Ewans, K.C., and M. Efthymiou, 2004, 23rd International Conference on Offshore Mechanics and Arctic Engineering, 20-25 June, Vancouver, Canada.
A response-based method for developing joint metocean criteria for on-bottom pipeline stability
Ewans, K. C., 2003, J. Offshore Mech. and Arctic Eng., May 2003, 119-125.
Oceanographic and motion response statistics for the operation of a weathervaning LNG FPSP
Ewans, K. C., van der Valk, C., Shaw, C., den Haan, J., Tromans, P., and L Vanderschuren, 2003, 22nd International Conference on Offshore Mechanics and Arctic Engineering, 8-13 June, Cancun, Mexico (OMAE2003-37394).
Directional Spreading in Ocean Swell
Ewans K.C., 2001, Proceedings of Ocean Wave Measurement and Analysis, San Francisco.
Reliability based analysis of on-bottom stability of submarine pipelines
Ewans, K. C., 2001, First International IMP-PEMEX symposium on reliability assessment for offshore structures, Mexico City, Dec. 3-4.
1991 - 2000
Estimating bimodal frequency-direction spectra from surface buoy data recorded during tropical cyclones
Ewans, K. C., and T. van der Vlugt, 1999, Journal of Offshore Mechanics and Arctic Engineering, 121, August, 172-180.
Observations of the directional spectrum of fetch-limited waves
Ewans, K. C., 1998, Journal of Physical Oceanography, 28, pp. 495–512.
Worldwide Measurements of Directional Wave Spreading
Forristall, G.Z., and K.C Ewans, 1998, Journal of Atmospheric and Oceanic Technology, 15, April.
Validation of the hindcast approach to the specification of wave conditions at the Maui location off the west coast of New Zealand
Cardone, V. J. and K. C. Ewans, 1992, Preprints of the 3rd International Workshop on Wave Hindcasting and Forecasting. Montreal, Quebec. May 9-22, 1992; p. 232-247.
Spectral features of the New Zealand deep-water ocean wave climate
Ewans, K.C. and A.C. Kibblewhite, 1992, N.Z. J. Mar. and Fresh. Res., 26, 323-338.
1981 - 1990
An examination of fetch-limited wave growth off the west coast of New Zealand by a comparison with the JONSWAP results
Ewans, K.C. and A.C. Kibblewhite, 1990, J. Phys. Oceanogr., 20, 1278-1296.
Some aspects of the ocean wave-field in New Zealand waters
Ewans, K.C. and A.C. Kibblewhite, 1988, Proc. 1st Symp. N.Z. Ocean Wave Soc., Auckland, 25 August.
Climatological statistics for wave directional data derived from pitch-roll buoys
Ewans, K.C., Abel, R., and D Smith, 1988, Proc. 1st Symp. N.Z. Ocean Wave Soc., Auckland, 25 August.
A study of ocean and seismic noise at infrasonic frequencies
Ewans, K.C. and A.C. Kibblewhite, 1986, In Ocean-Seismo Acoustics, Series IV Vol 16, pp 731-741, Eds. T. Akal and J.M. Berkson, Plenum Press.
Spectral characteristics of ocean waves undergoing generation in New Zealand waters
Ewans, K.C. and A.C. Kibblewhite, 1986, 9th Australasian Fluid Mechanics Conference, Auckland, 8-12 December.
Wave-wave interactions, microseisms, and infrasonic ambient noise in the ocean
Kibblewhite, A.C. and K.C. Ewans, 1985, J. Acoustical Soc. Am., 78(3), September.