Offre de thèse : Climate variability and societal responses in Pre-Columbian South America (Reading)

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Over recent years the number of archaeological records over tropical South America has increased significantly. These demonstrate widespread complex societies and large populations prior to European colonisation. The number of palaeoclimate records has also increased, but remains thinly and unevenly spread over the continent, making it challenging to constrain the timings and the spatial patterns that likely impacted past societies. This project addresses the important questions of: what were the likely spatial and temporal patterns of climate change over pre-Columbian tropical South America? Do past climate events correlate with palaeoenvironmental change and societal transformations of culture and/or technology? What mechanisms driving climate change are most relevant to societal impacts? The project will use multiple methodologies to address these questions. To get a better understanding of the spatiotemporal climate patterns over tropical South America the project will use and develop an existing palaeoclimate ‘reanalysis’, which incorporates past climate proxy data with models to produce a physically consistent time series of climate variables. New records will be incorporated and sensitivities to the climate model and prescribed land cover will be explored. Comparing recent syntheses of regional archaeological and palaeoenvironment records with the climate reanalysis, the student will be able to investigate how the temporal patterns of climate variables (such as rainfall, soil moisture, and drought index) correlate with environmental and cultural change. The project will explore how sensitive regional environments may have been and how different land-use systems may have influenced the resilience of different pre-Columbian cultures to climate events.

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