Nearshore shore-oblique bars, gravel outcrops, and their correlation to shoreline change

Schupp, Courtney A.; McNinch, Jesse E.; List, Jeffrey H.

doi:10.1016/j.margeo.2006.08.007

Cited by 78 publications

(78 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, ridge fields have been found to dissipate wave energy associated with storms along the Dutch coast (van de Meene et al, 1996). Similar deposits exist adjacent to barrier islands along the U.S. eastern seaboard (Duane et al, 1972;McBride and Moslow, 1991;Schwab et al, 2000) and elsewhere, and the effects of these and similar features on barrier island evolution are observed not only at Fire Island, but as demonstrated by Houser et al (2008) and Houser (2012) in the Gulf of Mexico, and McNinch (2004) and Schupp et al (2006) along the Outer Banks of North Carolina.…”

Section: Geologic Processes and Evolutionmentioning

confidence: 74%

“…Schwab et al (2000Schwab et al ( , 2013 extended the North Carolina studies to examine the relationship between stratigraphic and lithologic variations in the pre-Holocene and Holocene deposits of the inner continental shelf off Fire Island, New York, and centennial scales of shoreline change. McNinch (2004), Miselis and McNinch (2006) and Schupp et al (2006) built on the previous works but focused on smaller scales of framework geology and shoreline change. The studies examined the occurrence of paleochannels and deposits within the shoreface along a single barrier island and found a relationship between the patterns of decadal shoreline change and variable sediment availability, with shoreline erosion in areas dominated by paleochannels.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Decoupling processes and scales of shoreline morphodynamics

et al. 2016

View full text Add to dashboard Cite

Behavior of coastal systems on time scales ranging from single storm events to years and decades is controlled by both small-scale sediment transport processes and large-scale geologic, oceanographic, and morphologic processes. Improved understanding of coastal behavior at multiple time scales is required for refining models that predict potential erosion hazards and for coastal management planning and decision-making. Here we investigate the primary controls on shoreline response along a geologically-variable barrier island on time scales resolving extreme storms and decadal variations over a period of nearly one century. An empirical orthogonal function analysis is applied to a time series of shoreline positions at Fire Island, NY to identify patterns of shoreline variance along the length of the island. We establish that there are separable patterns of shoreline behavior that represent response to oceanographic forcing as well as patterns that are not explained by this forcing. The dominant shoreline behavior occurs over large length scales in the form of alternating episodes of shoreline retreat and advance, presumably in response to storms cycles. Two secondary responses include long-term response that is correlated to known geologic variations of the island and the other reflects geomorphic patterns with medium length scale. Our study also includes the response to Hurricane Sandy and a period of post-storm recovery. It was expected that the impacts from Hurricane Sandy would disrupt long-term trends and spatial patterns. We found that the response to Sandy at Fire Island is not notable or distinguishable from several other large storms of the prior decade.Published by Elsevier B.V.

show abstract

Section: Geologic Processes and Evolutionmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Decoupling processes and scales of shoreline morphodynamics

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Larger beach changes, spanning up to a few hundred meters alongshore, can result from surf zone currents interacting with and reorganizing sandbars [Ruessink et al, 2007]. Kilometerscale shoreline changes have been associated with wave propagation over larger-scale complex nearshore bathymetric features, such as persistent shore-oblique bar fields [McNinch, 2004;Schupp et al, 2006]. A unifying explanation for a seemingly consistent relationship between shoreline change variances across so many spatial scales therefore remains unclear, and the typical implications of a power law may not apply [e.g., Murray, 2007;Solow, 2005].…”

Section: Interpreting (Apparent) Power Lawsmentioning

confidence: 99%

“…Admittedly, these incident wave distributions ( Figure 5) can only serve as circumstantial evidence, limited as we are by the intervals (annual and longer) between lidar surveys; we cannot (and ought not) directly attribute all the shoreline changes reflected in the difference between the 1997 and 1998 lidar surveys, for example, to the effects of the Hurricane Bonnie event or are storm-driven waves and alongshore sediment flux the only forcing mechanisms affecting shoreline shape and evolution; interactions between incident wavefields and lithologic or bathymetric heterogeneities underlying the coastline (the coastal "geologic framework") surely influence nearshore hydrodynamics [Bender and Dean, 2003;Schupp et al, 2006;List et al, 2008;Benedet and List, 2008] and can also affect local supplies of beach sediment to effectively reinforce the amplitude of shoreline excursions in particular locations at particular scales [e.g., Valvo et al, 2006;. The longterm diffusional trend in shoreline change is therefore even more striking, considering the potential for storm-driven amplification of shoreline excursions (Figure 4) and the presence of known heterogeneities in the underlying physical framework [e.g., McNinch, 2004;.…”

Section: Controls On Long-term Shoreline Evolutionmentioning

confidence: 99%

“…Multidecadal records of shoreline change show zones of cumulative aggradation and erosion that vary alongshore at scales on the order of kilometers [e.g., Schupp et al, 2006 Focusing on the well-studied sandy barrier coastline of the northern North Carolina Outer Banks, United States (Figure 1), in this chapter, we build upon existing, fairweather analyses of shoreline change at multiple spatial and temporal scales [Tebbens et al, 2002;Lazarus and Murray, 2007; by introducing new analyses of two poststorm shorelines extracted from lidar surveys flown after Hurricane Bonnie (in 1998) and Hurricane Dennis and Hurricane Floyd (1999) ( Table 1). We examine changes in shoreline position between different pairs of surveys.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Large-Scale Patterns in Hurricane-Driven Shoreline Change

Lazarus

Ashton

Murray

2012

Extreme Events and Natural Hazards: The Complexity Perspective

View full text Add to dashboard Cite

The effects of storm events on cross-shore beach profiles have been the subject of concerted examination by nearshore researchers for decades. Because these investigations typically span relatively short (less than a kilometer) shoreline reaches, alongshore patterns of storm-driven shoreline change at multikilometer scales remain poorly understood. Here we measure shoreline position from seven airborne lidar surveys of coastal topography, spanning 12 years (1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008), along a continuous~80 km stretch of the northern North Carolina Outer Banks, United States. Two of the lidar surveys were flown in the wakes of Hurricane Bonnie (1998) and Hurricane Floyd (1999), allowing a rare window into storm-related alongshore coastline changes at large scales. In power spectra of shoreline change variance and in calculations of plan view shoreline curvature, we find evidence of transient behaviors at relatively small alongshore scales (less than a kilometer) and an interesting combination of both transient and cumulative shoreline change patterns at larger scales (1-10 km). Large-scale plan view shoreline undulations grow in amplitude during the storm intervals we examined, possibly forced by a large-scale morphodynamic instability. Long-term (decadal) shoreline adjustments, however, trend in the opposite direction, with an overall diffusion or smoothing of shoreline shape at multiple-kilometer scales, probably due to gradients in alongshore sediment transport. Although storms can significantly reshape the coastline across a wide range of scales, those changes do not necessarily accumulate to patterns of long-term change.

show abstract

Forecasting the response of Earth's surface to future climatic and land use changes: A review of methods and research needs

et al. 2015

View full text Add to dashboard Cite

In the future, Earth will be warmer, precipitation events will be more extreme, global mean sea level will rise, and many arid and semiarid regions will be drier. Human modifications of landscapes will also occur at an accelerated rate as developed areas increase in size and population density. We now have gridded global forecasts, being continually improved, of the climatic and land use changes (C&LUC) that are likely to occur in the coming decades. However, besides a few exceptions, consensus forecasts do not exist for how these C&LUC will likely impact Earth-surface processes and hazards. In some cases, we have the tools to forecast the geomorphic responses to likely future C&LUC. Fully exploiting these models and utilizing these tools will require close collaboration among Earth-surface scientists and Earth-system modelers. This paper assesses the state-of-the-art tools and data that are being used or could be used to forecast changes in the state of Earth's surface as a result of likely future C&LUC. We also propose strategies for filling key knowledge gaps, emphasizing where additional basic research and/or collaboration across disciplines are necessary. The main body of the paper addresses cross-cutting issues, including the importance of nonlinear/threshold-dominated interactions among topography, vegetation, and sediment transport, as well as the importance of alternate stable states and extreme, rare events for understanding and forecasting Earth-surface response to C&LUC. Five supplements delve into different scales or process zones (global-scale assessments and fluvial, aeolian, glacial/periglacial, and coastal process zones) in detail.

show abstract

Nearshore shore-oblique bars, gravel outcrops, and their correlation to shoreline change

Cited by 78 publications

References 31 publications

Decoupling processes and scales of shoreline morphodynamics

Decoupling processes and scales of shoreline morphodynamics

Large-Scale Patterns in Hurricane-Driven Shoreline Change

Forecasting the response of Earth's surface to future climatic and land use changes: A review of methods and research needs

Contact Info

Product

Resources

About