sets (A, B, C and D) are made of sands which had a long river transport 

 history, then only a brief wave-working history, prior to deposition. 



The historical sequence of mean parameters, for successive beach ridge 

 sets, shows an evolution of the near-shore sand pool from which the ridges 

 were built (Demirpolat at al , 1986). This historical plot shows long-term 

 improvement in sorting (oldest to youngest; despite excursions), and 

 fluctuations about the mean size. 



Relative moment measures were computed to minimize sand pool effects. 

 The plane table profile permits a comparison of changes in relative parameters 

 with changes in vertical position (relative to modern sea-level). The results 

 are clear when relative standard deviation is plotted, sample by sample, 

 against relative kurtosis. Samples known to come from boundaries (vertical 

 changes) plot in the "low relative kurtosis, low relative standard deviation". 

 There are very few exceptions. The changes in sea- level indicated in this 

 study were in the range 0.5 to about 4.0 m (Authors). 



072 DICKINSON, R. E. and CICERONE, R. J. 1986. "Future Global Warming From 

 Atmospheric Trace Gases," Nature . Vol 319, pp 109-115. 



Human activity this century has increased the concentrations of 

 atmospheric trace gases , which in turn has elevated global surface 

 temperatures by blocking the escape of thermal infrared radiation. Natural 

 climate variations are masking this temperature increase, but further 

 additions of trace gases during the next 65 years could double or even 

 quadruple the present effects, causing the global average temperature to rise 

 by at least 1° C and possibly by more than 5° C. If the rise continues into 

 the twenty- second century, the global average temperature may reach higher 

 values than have occurred in the past 10 million years. (Authors). 



073 DIECKMANN, R., PARTENSCKY, H. W. , and OSTERTHUN, M. 1987. "The Far- 

 Field Littoral Drift System and Sedimentation in a German Coastal Section," 

 Proceedings of Coastal Sediments '87 . Vol 2, pp 1706. 



The North Frisian tidal flats in the north of the German Bight are 

 morphologically unstable. A solution to this problem can be achieved by the 

 construction of an offshore dyke and a security dam. As a result of this, an 

 input of about 185 lO*" m' of sediment into the Suderau tidal basin has to be 

 expected. 



This paper deals with the question of the origin of this sediment. On 

 the basis of the sedimentation processes that have taken place in the Eider 

 estuary since the construction of a barrage, it was possible to analyze the 

 local littoral drift system and to prove that the input of sediments 

 originates from the bottom of the North Sea. 



Similar conditions will occur in the Suderau tidal flat area after the 

 construction of the security dam. Changes in the local littoral drift system 

 and the effects of the dam on the general conditions for sedimentation in the 

 Suderau and the adjacent outlying sands will be discussed. (Authors). 



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