期刊名称：Annales Universitatis Mariae Curie-Skodowska. Sectio B, Geographia, Geologia, Mineralogia et Petrographia
印刷版ISSN：0137-2025
出版年度：2004
卷号：LIX
出版社：Maria Curie-Sklodowska University, Lublin
摘要：In the Bellsund Region, the research of the littoral zone was undertaken during the first Polar Expedition of the Maria Curie-Skłodowska University to the Spitsbergen Island in 1986. The problem of its current development was taken up once again in 1995 to assess the morphological results and dynamics of the littoral zone with a special attention paid to a role of the shore ice. Further research was concentrated on a case of the speed of aggradation and degradation of the littoral zone under the influence of shore and drift ice. The attention was drawn to the role of shore ice and the importance of the archeological sites in estimating the changes of the relief of the littoral zone during historical time.
The shore was under investigation at the distance of 6 km from Skilvika to Josephbukta, which is situated on the west side of the Recherchefjorden (NE part of the Wedel Jarlsberg Land). It is made by an accumulative sea terrace of the height of 2-8 m a.s.l. (Terrace I) and 40-180 m wide, divided by a section of the cliff shore in a terminal moraine of the Renard Gacier (Fig. 1, Photo 1). This terrace is made of sand and gravels carried to the littoral zone by streams from the tundra area and rivers of the forefield area of the Scott and Renard Glacier.
The most important sea processes in the littoral zone are: waving, tides and longshore current causing abrasion or accumulation. Within the shore zone, their effects are heightened by fluvial and glacial processes and material movements. The investigated shore, in some sections shows diverse tendency of development. It seems that the decisive role is being played here by the spread of directions of costal streams determining distribution of material.
Shore ice is either the factor of modelling the beach surface or affecting the shore reshaping. Besides creating specific forms and structures, it plays a protective task. Well-developed and complexed shore ice effectively protects shore zone against devastating activity of storm waves. However its insufficient development and lack of freezing in the fiord might contribute to considerable reshaping and shore retreatment (Fig. 3, Photo 5).
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