摘要:

AbstractStudies of roches moutonnées, glacial striae and raised shorelines show that Hopen was covered by a thick Pleistocene ice sheet which, at least at one stage, moved out from an area NE of the island. In contrast to the conditions on Vestspitsbergen and Nordaustlandet the land-upheaval on Hopen has, during the last 10,000 years, proceeded at a fairly constant rate—and it seems to be going on.

ISSN:0435-3676    

DOI:10.1080/04353676.1969.11879802

出版商:Taylor&Francis    

年代:1969

数据来源: Taylor

摘要:

AbstractMorphological evidence for a marine connection between the Inari basin of north Finland and the Arctic Ocean in early postglacial times is described. The widespread occurrence of a strongly developed shoreline belonging to this marine phase was observed throughout South Varanger. This shore plane truncates, and is therefore later than the formation of the main belt of end-moraine belonging to the Tromsö-Lyngen glacial stage, which represents the northern limit of the Scandinavian ice sheet during the YoungerDryasclimatic phase. Also the same shore plane lies at a lower level than that of the Main Lateglacial Shoreline, formed during the deposition of the end-moraine. By means of a diagram the relationship between this shoreline and others could be established in relation to the position of the retreating ice front.

ISSN:0435-3676    

DOI:10.1080/04353676.1969.11879803

出版商:Taylor&Francis    

年代:1969

数据来源: Taylor

摘要:

AbstractMany Arctic beaches are characterised by low energy wave conditions and a falling sea level. Raised coastal features in west Baffin Island include beach ridges of fairly well-rounded stones compared with the stones of the modern beach. Foley Island, off west Baffin Island in Foxe Basin, has two main series of beach ridges, covering height ranges from 93 m to 68 m and 65 m to 40 m, and time periods of 6,800 to 5,600 B.P. and 5,500 to 4,800 B.P. respectively. A hiatus between the two series, when sea level stood between 65 and 70 m, allowed a complex fan pattern of ridges to form. The modern sand beach was surveyed before and after the ice break-up to illustrate its character and the effect of weak wave action in modifying the influence of shore ice. Chevron beach ridges are discussed, mainly from the evidence of air photographs. Finally some of the beach features and sediment characteristics of the east coast of Baffin Island are compared with those of the west coast. The more vigorous wave environment on the east allows greater wave effectiveness in rounding and sorting beach material.

ISSN:0435-3676    

DOI:10.1080/04353676.1969.11879804

出版商:Taylor&Francis    

年代:1969

数据来源: Taylor

摘要:

AbstractUnder certain conditions when the weather is windy marked thermal patterns in connection with pronounced hindrances for the air flow are found in infrared images recorded over open terrain. In this paper some effects of this kind have been described, and an attempt to interpret the genesis of the phenomena has also been made. Areas with funnel effects and side bands, windward and leeward areas with extreme temperature conditions and also a striation in the grey tones of the images parallel to the wind direction have thus been found to exist in several places in the infrared images. Further some model experiments have been performed with the aid of a simple apparatus. By means of this it has been possible to reproduce in the laboratory effects similar to some of those mentioned. This has facilitated the interpretation of the phenomena. Some of the effects—side bands and windward areas with extreme thermal conditions—were noticed in the aerial infrared images only after the effects had been found in the model experiments.

ISSN:0435-3676    

DOI:10.1080/04353676.1969.11879805

出版商:Taylor&Francis    

年代:1969

数据来源: Taylor