Shoreline Change and Coastal Vulnerability Characterization with Landsat Imagery: A Case Study in the Outer Hebrides,Scotland

Abstract

Observation of cause–effect patterns of change in coastal environments provides insights into vulnerable areas and supports prediction and adaptation to flooding and erosion. Historic and periodic (6–8 year intervals) imagery from the Landsat archive is used to investigate transformations in the Atlantic coast of two Scottish islands over the period 1989–2011. Supervised classification of spectrally normalized images followed by change detection and spatial analysis reveals the patterns of change and the location of the most dynamic coastal areas. Quantitative measures of recent shifts and movement rates of relevant coastal lines, such as the lower limit of land-based vegetation, are assessed with the Digital Shoreline Analysis System. While very low rates are indicated for horizontal changes in the position of the lower limit of land-based vegetation (0.3?m?y^?1), specific areas have been subjected to high rates of coastal progradation as well as erosion (e.g. 2.5?m?y^?1 at Stilligarry). Information derived from satellite data supports the characterization of geomorphologically dynamic coasts at regional scales. With a rich and open access archive of imagery, a commitment to continuity, and compatibility with the Earth observation missions of other space programs, the Landsat mission offers useful and otherwise unavailable data for monitoring of coastal areas.     

A Multi‐disciplinary Approach to the Archaeological Investigation of a Bedrock‐Dominated Shallow‐Marine Landscape: an example from the Bay of Firth,Orkney, UK

Investigation of shallow‐marine environments for submerged prehistoric archaeology can be hampered in many localities by extensive bedrock exposure and thus limited preservation potential. Using the concept of ‘seamless archaeology’ where land‐based archaeology is integrated across the intertidal zone through to the offshore, a multi‐disciplinary approach is essential. This approach taken in the Bay of Firth, Orkney uses geophysics, historical archive and ethno‐archaeology, coastal geomorphology, palaeo‐environmental analyses and sea‐level science, and allows a clearer understanding of the landscape in which prehistoric settlers lived. While acknowledging the limitations of the preserved environment, we are successful in identifying areas of archaeological potential on the sea‐bed for both upstanding structural elements as well as sediment preservation that contains evidence for human occupation. This has wider implications beyond Orkney's World Heritage sites to provide a blueprint for similar studies elsewhere in the coastal zone. © 2012 The Authors     

Implications of climate change for glacier tourism

For more than 100 years, the Fox and Franz Josef Glaciers in Westland Tai Poutini National Park have attracted thousands of tourists annually and have emerged as iconic destinations in New Zealand. However, in recent years, the recession of both glaciers has been increasingly rapid and the impacts on, and implications for, visitor experiences in these settings remain relatively unexplored. A mixed-method approach was adopted to investigate visitor experiences and stakeholder perspectives through an assessment of climate-related changes on tourism at the glaciers in Westland Tai Poutini National Park. The bio-physical conditions at both the Franz Josef and Fox Glaciers were reviewed in order to assess the magnitude and rate of retreat. Perceptions of climate change risk and awareness of impacts in the National Park were assessed through stakeholder interviews (n = 13) and a visitor survey (n = 500) was used to better understand how impacts at these sites have affected and may continue to affect visitor experiences. Research results were reported to local communities via a series of public talks. Results revealed the fundamental importance of viewing the glaciers as a significant travel motive of visitors, suggesting that there is a ‘last chance’ dimension to their experience. Furthermore, the results demonstrate a high adaptive capacity of local tourism operators under rapidly changing environmental conditions. The implications of altered visitor experiences for tourism operators and protected area managers are discussed in light of these findings.     

Accessing Hunter-Gatherer site structures using Fourier transform infrared spectroscopy: applications at a Taltheilei settlement in the Canadian Sub-Arctic

The results of Fourier transform infrared spectroscopy on soils and caribou bone from a Taltheilei culture settlement in northern Canada contribute to developing micro-archaeological approaches suitable for locating and characterizing hearth and midden features on hunter-gatherer sites. A weak yet pervasive signal for montgomeryite was developed from the diagenesis of dispersed ash and caribou processing residues. Disordered calcite, carbonate hydroxylapatite, charcoal, and burned bone in two pit-house hearth deposits indicate that both wood and bone were used for fuel. Crystallinity indices and carbonate/phosphate ratios for bone indicate high intensity burning. These data, in tandem with the presence of semi-subterranean dwellings, demonstrate that this particular tundra-based encampment was occupied during cold seasons, a type of settlement behaviour previously unrecognized in the Taltheilei archaeological record. Our results confirm that Fourier transform infrared spectroscopy is an accessible, rapid, and cost effective means of discovering micro-archaeological evidence valuable for reconstructing hunter-gatherer site structures.     

Geography,religion and the state: A comment on an article by Michael Pacione

Professor Pacione's call for geographers to consider the role that ‘responsible theology’ might play in assisting the development of ‘relevant’ human geography is examined. Issue is taken with his presentation of religion. Alternative geographical approaches to religion are outlined, and the relationship of the academic to both religion and government is explored.     

Space syntax analysis of Central Inuit snow houses

Space syntax is a graph-based theory used by architects to examine how the spatial layout of buildings and cities influences the economic, social, and environmental outcomes of human movement and social interaction. Archaeologists have explored this concept by analyzing how social structure is reflected in the spatial configuration of public and domestic architecture. In this paper, space syntax is used to examine the spatial morphology of snow houses built by three Central Inuit groups in the Canadian Arctic, based on ethnohistoric and ethnographic accounts. The results of this study demonstrate that variation in family structure and the behavioral directives present in Inuit kinship systems are reflected in the spatial configurations of snow house architecture. This has important implications for understanding how architecture might be used to identify enduring and changing patterns of household and community organization in the archaeological record.