Disequilibrium, adaptation and the Norse settlement of Greenland

This research was supported by the University of Edinburgh ExEDE Doctoral Training Studentship and NSF grant numbers 1202692 and 1140106.There is increasing evidence to suggest that arctic cultures and ecosystems have followed non-linear responses to climate change. Norse Scandinavian farmers introduced agriculture to sub-arctic Greenland in the late tenth century, creating synanthropic landscapes and utilising seasonally abundant marine and terrestrial resources. Using a niche-construction framework and data from recent survey work, studies of diet, and regional-scale climate proxies we examine the potential mismatch between this imported agricultural niche and the constraints of the environment from the tenth to the fifteenth centuries. We argue that landscape modification conformed the Norse to a Scandinavian style of agriculture throughout settlement, structuring and limiting the efficacy of seasonal hunting strategies. Recent climate data provide evidence of sustained cooling from the mid thirteenth century and climate variation from the early fifteenth century. Archaeological evidence suggests that the Norse made incremental adjustments to the changing sub-arctic environment, but were limited by cultural adaptations made in past environments.Publisher PDFPeer reviewe

Modeling Historic Rangeland Management and Grazing Pressures in Landscapes of Settlement

Defining historic grazing pressures and rangeland management is vital if early landscape threshold crossing and long–term trajectories of landscape change are to be properly understood. In this paper we use a new environmental simulation model, Búmodel, to assess two contrasting historical grazing landscapes in Mývatnssveit Iceland for two key periods—the colonization period (ca. Landnám, A.D. 872–1000) and the early eighteenth century A.D. Results suggest that there were spatial and temporal variations in productivity and grazing pressure within and between historic grazing areas and indicate that land degradation was not an inevitable consequence of the livestock grazing introduced with settlement. The results also demonstrate the significance of grazing and livestock management strategies in preventing overgrazing, particularly under cooler climatic conditions. The model enables detailed consideration of historic grazing management scenarios and their associated landscape pressures

Polities, neighbourhoods and things in-between

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Expensive errors or rational choices: the pioneer fringe in Late Viking Age Iceland

Just as the colonies established on the North Atlantic islands in the Viking Age were peripheral to Europe, so these islands had their own peripheral areas. In Iceland the highland margins have long been a focus of archaeological research and the prevailing view has been that highland settlement failed because people had made unrealistic assessments of carrying capacity. This paper presents a case study of the northern highland valley of Krókdalur and argues that the dating and pattern of settlement in that valley indicates that its settlers were keenly aware of its limitations. It also suggests explanatory frameworks that can make sense of this marginal settlement without resorting to environmental determinism

Abandoned farms, volcanic impacts and woodland management: revisiting Þjórsárdalur, the ‘Pompeii of Iceland’

Geomorphological maps and nine soil profiles containing 92 tephra layers have been examined to explore the nature of medieval environmental change in Þjórsárdalur, Iceland, where farms are thought to have been abandoned after the massive tephra fall from the eruption of Hekla in 1104 A.D. We present evidence for continued human activity in the area in the two centuries following the 1104 A.D. eruption, indicating a continued utilization of the region that changed after another major episode of volcanic fallout in 1300 A.D. We propose that measures were taken in the fourteenth century to conserve woodland in Þjórsárdalur that resulted in localized landscape stabilization that continued throughout the following Little Ice Age episodes of climate deterioration

Stable isotopic (δ13C and δ15N) characterization of key faunal resources from Norse period settlements in North Iceland

During the Viking Age, Norse peoples established settlements across the North Atlantic, colonizing the pristine and near-pristine landscapes of the Faroe Islands, Iceland, Greenland, and the short-lived Vinland settlement in Newfoundland. Current North Atlantic archaeological research themes include efforts to understand human adaptation and impact in these environments. For example, early Icelandic settlements persisted despite substantial environmental impacts and climatic change, while the Greenlandic settlements were abandoned ca. AD 1450 in the face of similar environmental degradation. The Norse settlers utilized both imported domestic livestock and natural fauna, including wild birds and aquatic resources. The stable isotope ratios of carbon and nitrogen (expressed as δ13C and δ15N) in archaeofaunal bones provide a powerful tool for the reconstruction of Norse economy and diet. Here we assess the δ13C and δ15N values of faunal and floral samples from sites in North Iceland within the context of Norse economic strategies. These strategies had a dramatic effect upon the ecology and environment of the North Atlantic islands, with impacts enduring to the present day