the other hand, sea- levels were not coherent between the southern (south of 

 Kiptopeake B.) and northern part at shorter time scales. 



Local wind forcing was important from Cape Cod to Cape May; most of the 

 sea-level change was driven by the alongshore (northeast-southwest) wind. In 

 addition, the east-west wind set up a large surface slope between Nantucket 

 and Sandy Hook. The wind set-up may be due to the bent coastline around Sandy 

 Hook; the frictional effect may also play a role. 



South of Cape May, the local alongshore wind forcing was dominant at 

 time scales shorter than 3.3 days (in winter). At longer time scales, contri- 

 bution from free shelf waves was significant. A southward phase propagation 

 of 600 km/day was found between Cape May and Cape Hatteras , which is consis- 

 tent with the shelf wave model. The dominance of free waves apparently was 

 due to the lack of coherent wind forcing south of Cape May. (Authors). 



359 WATTS, A. B. 1982. "Tectonic Subsidence, Flexure and Global Changes of 

 Sea-Level," Nature . Vol 297, pp 469-474. 



Tectonic models for the evolution of passive continental margins predict 

 that following rifting, sediments should progressively onlap basement at the 

 edge of a margin as the lithosphere cools and increases its flexural rigidity 

 with age. The pattern of modelled onlap is strikingly similar to that used by 

 Vail and colleagues to estimate sea- level rise through geological time. This 

 similarity suggests that major portions of stratigraphical sequences at mar- 

 gins may have a tectonic, rather than eustatic, control. The patterns of 

 onlap used by Vail and colleagues may be widespread, however, because several 

 widely separated passive margins rifted at similar times, but they are 

 unlikely to be worldwide. (Author). 



360 WEGGEL, J. R. 1979. "A Method for Estimating Long-Term Erosion Rates 

 From a Long-Term Rise in Water Level," US Army Engineer Coastal Engineering 

 Research Center, Technical Aid. No. 79-2, pp 17. 



A method is presented for estimating long-term erosion rates resulting 

 from a rise in sea-level. The method is based on Bruun's (1982) method with 

 an exponential curve fitted to the offshore beach profile. The exponential 

 profile establishes the beach profile closure depth beyond which it is assumed 

 waves do not move sand. An example problem using sea-level rise data of Hicks 

 (1978) illustrates application of the technique. (Author). 



165 



