Abstract
The coast of the U.S. Pacific Northwest (PNW), the ocean shores of Washington, Oregon and Northern California, experience property impacts ranging from the erosion and flooding that occur during the hours to days of an extreme winter storm, on a decadal time scale with the erosion processes enhanced by strong El Niños, and with the expectation of future increased hazards associated with the global rise in sea level and the possibility that storm intensities and their generated waves will continue in the future. The PNW is noted for its extreme waves, with measured significant wave heights during winter storms having reached 15 m, combining with tides elevated by a surge to erode both foredunes and sea cliffs. The beach morphology plays an important role, particularly rip current embayments that act to localize the sites of maximum property impacts. Of concern, wave buoy measurements have documented that the storm-generated wave heights have been increasing since at least the 1980s, and research underway has found climate controls on the levels of storm surges. The impacts of rising sea levels are variable along this shore, in that while the entire PNW coast is tectonically rising, the local rate of rise in the land varies in comparison with the eustatic rise in sea level, with some stretches of shore being submergent while others are emergent. Projections of accelerated rates of global sea-level rise indicate that by the end of this century the entire PNW coast will be submergent, experiencing significantly increased hazards from erosion and flooding. In recent decades the most extreme erosion impacts have occurred during strong El Niños, specifically those in 1982–1983 and 1997–1998 when measured tides were elevated by 25–50 cm throughout the winter, caused by warmer water temperatures and ocean currents. During those El Niños there was also a diversion of the storm tracks with waves arriving more from the southwest, producing northward displacements of sand on the beaches, resulting in extreme “hot-spot” erosion north of headlands and tidal inlets. With these multiple climate controls on the processes, it is certain that during this century there will be far more erosion and flooding problems along the U.S. PNW than in the past. The ultimate hazard, however, are the predictions by seismologists that there will be another major subduction earthquake like that which occurred on 26 January 1700, with the land along this coast abruptly dropping by 1–2 m, followed minutes later by the arrival of immense tsunami waves, producing devastating impacts comparable to those recently experienced in Sumatra and Japan.
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References
Allan JC, Komar PD (2000) Are ocean wave heights increasing in the eastern North Pacific? EOS Trans Am Geophys Union 81(47):561–567
Allan JC, Komar PD (2002) Extreme storms on the Pacific Northwest Coast during the 1997–98 El Niño and 1998–99 La Niña. J Coast Res 18:175–193
Allan JC, Komar PD (2004) Environmentally compatible cobble berm and artificial dune for shore protection. Shore Beach 72(1):9–18
Allan JC, Komar PD (2006) Climate controls on US West Coast erosion processes. J Coast Res 22(3):511–529
Allan JC, Priest GR (2001) Evaluation of coastal erosion hazard zones along dune and bluff backed shorelines in Tillamook County, Oregon: cascade head to Cape Falcon. Oregon Department of Geology and Mineral Industries, Portland, p 126
Allan JC, Komar PD, Priest GR (2003) Shoreline variability on the high-energy Oregon coast and its usefulness in erosion-hazard assessments: shoreline mapping and change analysis. J Coast Res, Spec Issue #38, Byrnes MR, Crowell M, Fowler C (eds), pp 83–105
Allan JC, Witter RC et al (2009) Coastal geomorphology, hazards, and management issues along the Pacific Northwest Coast of Oregon and Washington. Volcanoes to Vineyards: geologic field trips through the dynamic landscape of the Pacific Northwest: Geological Society of America Field Guide 15. O’Connor JE, Dorsey RJ, Madin IP, The Geological Society of America, pp 495–519
Allan JC, Komar PD, Ruggiero P (2011) Storm surge magnitudes and frequency on the central Oregon coast: Solutions to Coastal Disasters. Am Soc Civil Eng, pp 53–64
Allan JC, Komar PD, Ruggiero P, Witter R (2012) The March 2011 Tohoku tsunami and its impacts along the U.S. West Coast. J Coast Res 28(5):1142–1153
Atwater BF (1987) Evidence for great Holocene earthquakes along the outer coast of Washington State: Science 236:942–944
Bacon S, Carter DJT (1991) Wave climate changes in the North Atlantic and North Sea. Int J Climatol 11:545–558
Bacon S, Carter DJT (1993) A connection between mean wave height and atmospheric pressure gradient in the North Atlantic. Int J Climatol 11:545–558
Baron HM (2011) Coastal Hazards and Community Exposure in a Changing Climate: The Development of Probabilistic Coastal Change Hazard Zones: Master of Science thesis, Oregon State University, Corvallis, Oregon, p 82
Benumoff BT, Griggs GB (1999) The dependence of seacliff erosion rates on cliff material properties and physical processes, San Diego County, California. Shore Beach 67(4):29–41
Burgette RJ, Weldon RJ, Schmidt DA (2009) Interseismic uplift rates for western Oregon and along-strike variation in locking on the Cascadia subduction zone. J Geophys Res 114:B01408. doi:10.1029/2008JB005679
Carter DJT, Draper L (1988) Has the northeast Atlantic become rougher? Nature 332:494
Clark JA, Farrell WE, Peltier WR (1978) Global change in post-glacial sea level: a numerical calculation. Quaternary Res 9:265–287
Clemens KE, Komar PD (1988) Oregon beach-sand compositions produced by the mixing of sediments from multiple sources under a transgressing sea. J Sediment Petrol 56:15–22
Collins B, Sitar N (2008) Processes of coastal bluff erosion in weakly lithified sands, Pacifica, California, USA. Geomorphology 97:483–501
Fravre A, Gershunov A (2006) Extra-tropical cyclone/anticyclonic activity in North-Eastern Pacific and air temperature extremes in Western North America. Clim Dyn 26:617–629
Gelfenbaum G, Kaminsky GM (2010) Large-scale coastal change in the Columbia River Littoral Cell: an overview. Mar Geol Spec273(1–4):1–10 (Special issue)
Gelfenbaum G, Sherwood CR, Peterson CD, Kaminsky GM, Buijsman MC, Twitchell DC, Ruggiero P, Gibbs AE, Reed C (1999) The Columbia River littoral cell: a sediment budget overview. Proc Coast Sediments 99:1660–1675
Gemmrich J, Thomas B, Bouchard R (2011) Observational changes and trends in northeast Pacific wave records. Geophys Res Lett 38:L22601. doi:10.1029/2011GL049518
Geng Q, Sugi M (2003) Possible change of extratropical cyclone activity due to enhanced greenhouse gases and sulfate aerosols—study with high-resolution AGCM. J Clim 16:2262–2274
Goldfinger C, Nelson CH, Morey A, Johnson JE, Guterrez-Pastor J, Eriksson AT et al. (2010) Turbidite event history: methods and implications for holocene paleoseismicity of the Cascadia Subductgion Zone. U. S. Geological Survey Professional Paper 1661-F, Reston, VA
Graham NE, Diaz HF (2001) Evidence for intensification of North Pacific winter cyclones since 1948. Bull Am Meteorol Soc 82:1869–1893
Grinsted A, Moore JC, Jevrejeva S (2009) Reconstructing sea level from paleo and projected temperatures 200 to 2100 AD. Clim Dyn 34(4):461–472
Hall JW, Meadowcroft IC, Lee EM, van Gelder PHAJM (2002) Stochastic simulation of episodic soft coastal cliff recession. Coast Eng 46(3):159–174
Harris EL (2011) Assessing physical vulnerability of the coast in light of a changing climate: an integrated, multi-hazard, multi-timescale approach. Masters of Science thesis, Oregon State University, 91 p
Holgate S (2007) On the decadal rates of sea level change during the twentieth century. Geophys Res Lett 34:1–4
Horton R, Herweijer C, Rosenzweig C, Liu J, Gornitz V, Ruane AC (2008) Sea level rise projections for current generation CGCMs based on the semi-empirical method. Geophys Res Lett 35(L02715):5
Jennings R, Schulmeister J (2002) A field based classification scheme for gravel beaches. Mar Geol 186:211–228
Jevrejeva S, Moore JC, Grinsted A (2010) How will sea level respond to changes in natural and anthropogenic forcings by 2100? Geophys Res Lett 37(L07703):5
Kaminsky GM, Ruggiero P, Gelfenbaum G (1998) Monitoring coastal change in southwest Washington and northwest Oregon during the 1997/98 El Niño. Shore Beach 66(3):42–51
Kaminsky GM, Ruggiero P, Buijsman MC, McCandless D, Gelfenbaum G (2010) Historical evolution of the Columbia River Littoral Cell. Mari Geol 273(1–4):96–126
Komar PD (1973) Computer models of delta growth due to sediment input from rivers and longshore transport. Geol Soc Am Bull 84:2217–2226
Komar PD (1978) Wave conditions on the Oregon coast during the winter of 1977–78 and the resulting erosion of Nestucca Spit. Shore Beach 46:3–8
Komar PD (1983) The erosion of Siletz Spit, Oregon. In: Komar PD (ed) Handbook of coastal processes and erosion. CRC Press, Boca Raton, pp 65–76
Komar PD (1986) The 1982–83 El Niño and erosion on the coast of Oregon. Shore Beach 54:3–12
Komar PD (1997) The Pacific Northwest coast: living with the shores of Oregon and Washington. Duke University Press, Durham
Komar PD (1998a) The 1997–98 El Niño and erosion of the Oregon coast. Shore Beach 66:33–41
Komar PD (1998b) Beach processes and sedimentation, 2nd edn. Prentice-Hall, Inc., Upper Saddle River, 544 p
Komar PD, Allan J, Dias-Mendez GM, Marra JJ, Ruggiero P (2000) El Niño and La Niña: Erosion processes and impacts. Proc 27th Int Coastal Eng Conf, pp 2414–2427
Komar PD, Allan JC (2002) Nearshore-process climates related to their potential for causing beach and property erosion. Shore & Beach 70(3):31–40
Komar PD, Allan JC (2007) A note on the depiction and analysis of wave-height histograms. Shore Beach 75(3):1–5
Komar PD, Good JW, Shih S-M (1988) Erosion of Netarts Spit, Oregon: continued impact of the 1982–83 El Niño. Shore Beach 57:11–19
Komar PD, Li MZ (1991) Black-sand placers at the mouth of the Columbia River, Oregon and Washington. Mar Min 10:171–187
Komar PD, Lizarraga-Arciniega JR, Terich TA (1976) Oregon coast shoreline changes due to jetties. J Waterways Harbors Coast Eng, ASCE 102(WW1):13–30
Komar PD, McKinney BA (1977) The Spring 1976 erosion of Siletz Spit, Oregon, with an analysis of the causative storm conditions. Shore Beach 45:23–30
Komar PD, McDougal WG, Marra JJ, Ruggiero P (1999) The rational analysis of setback distances: applications to the Oregon coast. Shore Beach 67(1):41–49
Komar PD, Rea CC (1976) Erosion of Siletz Spit, Oregon. Shore Beach 44:9–15
Komar PD, Shih S-M (1993) Cliff erosion along the Oregon coast: a tectonic – sea level imprint plus local controls by beach processes. J Coast Res 9:747–765
Komar PD, Wang C (1984) Processes of selective grain transport and the formation of placers on beaches. J Geol 92:637–655
Komar PD, Torstenson RW, Shih S-M (1991) Bandon, Oregon: coastal development and the potential for extreme ocean hazards. Shore Beach 59:14–22
Komar PD, Marra JJ, Allan JC (2002) Coastal-erosion processes and assessments of setback distances. Proceedings, Solutions to Coastal Disasters Conference. Am Soc Civil Eng, pp 808–822
Komar PD, McManus J, Styllas M (2004) Sediment accumulation in Tillamook Bay, Oregon: natural processes versus human impacts. J Geol 112:455–469
Komar PD, Allan JC, Ruggiero P (2010) Ocean wave climates: trends and variations due to Earth’s changing climate. In: Kim YC (ed) Handbook of Coastal and Ocean Engineering. World Scientific Publishing Co., Hackensack, pp 971–975
Komar PD, Allan JC, Ruggiero P (2011a) Sea level variations along the U.S. Pacific Northwest Coast: tectonic and climate controls. J Coast Res 27(5):808–823
Komar PD, Allan JC, Ruggiero P (2011b) Earth’s changing climate and enhanced erosion on the U.S. Pacific Northwest coast. Proceedings, Solutions to Coastal Disasters. Am Soc Civil Eng, pp 209–220
Kulm LD, Byrne JV (1966) Sedimentary response to hydrography in an Oregon estuary. Mar Geol 4:85–118
Li MZ, Komar PD (1992) Longshore grain sorting and beach placer formation adjacent to the Columbia River. J Sediment Petrol 62:429–441
McCabe GJ, Clark MP, Serreze MC (2001) Trends in Northern Hemisphere surface cyclone frequency and intensity. J Clim 14:2763–2768
Meehl GA, Stocker TF, Collins WD, Friedlingstein P, Gaye AT, Gregory JM, Kitoh A, Knutti R, Murphy JM, Noda A, Raper SCB, Watterson IG, Weaver AJ, Zhao Z-C (2007) Global climate projections. In: Solomon S, Qin D, Manning M, Chen Z, Marquis M, Averyt KB, Tignor M, Miller HL (eds) Climate change 2007: the physical science basis. Contribution of working group i to the fourth assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge, UK/New York
Méndez FJ, Menéndez M, Luceño A, Losada IJ (2006) Estimation of the long-term variability of extreme significant wave height using a time-dependent peak over threshold (POT) model. J Geophys Res 111(C07024):13
Peterson C, Scheidegger K, Komar PD (1982) Sand dispersal patterns in an active-margin estuary of the northwestern United States as indicated by sand composition, texture and bedforms. Mar Geol 50:77–96
Pfeffer WT, Harper JT, O’Neel S (2008) Kinematic constraints on glacier contributions to 21st-century sea-level rise. Science 321:1340–1343
Pugh D (2004) Changing sea levels. Cambridge University Press, Cambridge, UK
Rahmstorf S (2007) A semi-empirical approach to projecting future sea-level rise. Science 315:368–370
Rahmstorf S (2010) A new view on sea level rise. Nature 4:44–45
Revell DL, Komar PD, Sallenger AH (2002) An application of LIDAR to analyses of El Niño erosion in the Netarts Littoral Cell, Oregon. J Coast Res 18(4):792–801
Ruggiero P (in press) Is the intensifying wave climate of the U.S. Pacific Northwest increasing flooding and erosion risk faster than sea level rise?. J Waterways Ports Coastal Ocean Eng
Ruggiero P, Komar PD, McDougal WG, Beach RA (1996) Extreme water levels, wave runup and coastal erosion: Proceedings 25th International Coastal Engineering Conference. Am Soc Civil Eng, pp 2793–2805
Ruggiero P, Komar PD, McDougal WG, Marra JJ, Beach RA (2001) Wave runup, extreme water levels and the erosion of properties backing beaches. J Coast Res 17(2):407–419
Ruggiero P, Holman RA, Beach RA (2004) Wave runup on a high-energy dissipative beach. J Geophys Res 109:C06025. doi:10.1029/2003JC60
Ruggiero P, Buijsman M, Kaminsky GM, Gelfenbaum G (2010a) Modeling the effects of wave climate and sediment supply variability on large-scale shoreline change. Mar Geol 273(1–4):127–140 (Special issue)
Ruggiero P, Komar PD, Allan JC (2010b) Increasing wave heights and extreme-value projections: the wave climate of the U.S. Pacific Northwest. Coast Eng 57:539–552
Ruggiero P, Baron H, Harris E, Allan J, Komar P, Corcoran P (2011) Incorporating uncertainty associated with climate change into coastal vulnerability assessments: Solutions to Coastal Disasters, Am Society Civil Eng, pp 602–613
Satake K, Shimazaki K, Tsuji Y, Ueda K (1996) Time and size of a giant earthquake in Cascadia inferred from Japanese tsunami records of January 1700. Nature 379:246–249
Seymour RJ (1996) Wave climate variability in southern California. J Waterway Port Coast Ocean Eng Am Assoc Civil Eng 122:182–186
Seymour RJ (1998) Effects of El Niño on the West Coast Wave Climate. Shore Beach 66:3–6
Shih S-M, Komar PD (1994) Sediments, beach morphology and sea cliff erosion within an Oregon coast littoral cell. J Coast Res 10:144–157
Stembridge JE (1975) Shoreline changes and physiographic hazards on the Oregon coast. PhD dissertation, University of Oregon, Eugene
Stockdon HF, Holman RA, Howd PA, Sallenger AH (2006) Empirical parameterization of setup, swash, and runup. Coast Eng 53:573–588
Terich TA, Komar PD (1974) Bayocean Spit: coastal and ocean engineering. Shore Beach 42:3–10
Terich TA, Levenseller T (1986) The severe erosion of Cape Shoalwater, Washington. J Coast Res 2:465–477
Thom BG, Hall W (1991) Behavour of beach profiles during accretion and erosion dominated periods. Earth Surf Process Landf 16:113–127
Tillotson K, Komar PD (1997) The wave climate of the Pacific Northwest (Oregon & Washington): a comparison of data sources. J Coast Res 13:440–452
Vermeer M, Rahmstorf S (2009) Global sea level linked to global temperature. Proc Natl Acad Sci 106(51):21527–21532
Wigley TML (1988) The effect of changing climate on the frequency of absolute extreme events. Clim Monit 17:44–55
Wolter K, Timlin MS (1993) Monitoring ENSO in COADS with a seasonally adjusted principal component index. In: 17th climate diagnostics workshop, Climatology Survey CIMMS and the School of Meteorology, University of Oklahoma, Oklahoma, pp 52–57
Wright LD, Short AD (1983) Morphodynamics of beaches and surf zones in Australia. In: Komar PD (ed) Handbook of coastal processes and erosion. CRC Press, Boca Raton, pp 35–64
Young IR, Zeigler S, Babanin AV (2011) Global trends in wind speed and wave height. Science 332:451–455
Zhang K, Douglas BC, Leatherman S (2001) Beach erosion potential for severe noreasters. J Coast Res 17(2):309–321
Acknowledgements
Much of the review presented in this chapter is the product of collaborative research undertaken with graduate students at Oregon State University—it is important to recognize their participation and contributions. Specific for this paper, thanks to Erica Harris for having undertaken extra-credit analyses of the Pacific Northwest wave climates. The senior author (PDK) gratefully acknowledges the support over the years by the Sea Grant Program, having funded our research and supported these students. Our recent investigations of the climate controls and developments of management application strategies were funded by NOAA’s Climate Program Office Sectoral Applications Research Program (SARP)—many thanks for their support.
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Komar, P.D., Allan, J.C., Ruggiero, P. (2013). U.S. Pacific Northwest Coastal Hazards: Tectonic and Climate Controls. In: Finkl, C. (eds) Coastal Hazards. Coastal Research Library, vol 1000. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-5234-4_21
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