Northern Eurasia Future Initiative (NEFI): facing the challenges and pathways of global change in the 21st century

During the past several decades, the Earth system has changed significantly, especially across Northern Eurasia. Changes in the socio-economic conditions of the larger countries in the region have also resulted in a variety of regional environmental changes that can have global consequences. The Northern Eurasia Future Initiative (NEFI) has been designed as an essential continuation of the Northern Eurasia Earth Science Partnership Initiative (NEESPI), which was launched in 2004. NEESPI sought to elucidate all aspects of ongoing environmental change, to inform societies and, thus, to better prepare societies for future developments. A key principle of NEFI is that these developments must now be secured through science-based strategies co-designed with regional decision makers to lead their societies to prosperity in the face of environmental and institutional challenges. NEESPI scientific research, data, and models have created a solid knowledge base to support the NEFI program. This paper presents the NEFI research vision consensus based on that knowledge. It provides the reader with samples of recent accomplishments in regional studies and formulates new NEFI science questions. To address these questions, nine research foci are identified and their selections are briefly justified. These foci include: warming of the Arctic; changing frequency, pattern, and intensity of extreme and inclement environmental conditions; retreat of the cryosphere; changes in terrestrial water cycles; changes in the biosphere; pressures on land-use; changes in infrastructure; societal actions in response to environmental change; and quantification of Northern Eurasia's role in the global Earth system. Powerful feedbacks between the Earth and human systems in Northern Eurasia (e.g., mega-fires, droughts, depletion of the cryosphere essential for water supply, retreat of sea ice) result from past and current human activities (e.g., large scale water withdrawals, land use and governance change) and potentially restrict or provide new opportunities for future human activities. Therefore, we propose that Integrated Assessment Models are needed as the final stage of global change assessment. The overarching goal of this NEFI modeling effort will enable evaluation of economic decisions in response to changing environmental conditions and justification of mitigation and adaptation efforts

Occupying Cave-Sites: A Case Study from Azokh 1 Cave (Southern Caucasus)

peer reviewedThe Caucasus is an important intercontinental passageway for fauna and hominin dispersal from Africa to Eurasia. Numerous Pleistocene sites emphasise the importance of this region for the study of human evolution and hominin ‘Out of Africa’ dispersals. The Azokh 1 site in the Southern Caucasus provides a stratigraphic sequence, the renewed excavations of which have shown the presence of well-contextualised lithic and faunal assemblages dated between 300 and 100 ka associated with hominin remains (Homo heidelbergensis and Homo neanderthalensis) also found in the site. Faunal assemblages are dominated by cave bear (Ursus spelaeus) remains resulting from their hibernation at the rear of the cave. Recent taphonomic studies indicate the in-situ exploitation of some of these remains. Other faunal remains, mainly herbivore, some showing signs of human activity, were most likely introduced into the cave by hominins. The study of lithic artefacts suggests an incomplete operative chain for all raw materials with a general absence of knapping debris, unknapped cobbles/pebbles, rare cores and refits. Techno-typologically, these assemblages display characteristics that link them to Late Acheulean or Early Mousterian and Levallois Mousterian traditions. The faunal and lithic assemblages originate from the rear of the cave. Research results, including some preliminary data on lithic use-wear, along with analyses of spatial distribution and post-depositional modification, indicate that occupation of the cave was short and seasonal in character. Cave bears were an important factor affecting the duration of hominin occupation of the cave. The characteristics of the lithic assemblages suggest mobile toolkits, with some isolated evidence of in situ knapping and retouching activities