Authors
Suzette GA Flantua, Henry Hooghiemstra, Mathias Vuille, Hermann Behling, John F Carson, William D Gosling, Isabel Hoyos, Marie-Pierre Ledru, Encarni Montoya, Francis Mayle, Antonio Maldonado, Valentí Rull, Marcela S Tonello, Bronwen S Whitney, Catalina González-Arango
Publication date
2016/2/29
Journal
Climate of the Past
Volume
12
Issue
2
Pages
483-523
Publisher
Copernicus Publications
Description
An improved understanding of present-day climate variability and change relies on high-quality data sets from the past 2 millennia. Global efforts to model regional climate modes are in the process of being validated against, and integrated with, records of past vegetation change. For South America, however, the full potential of vegetation records for evaluating and improving climate models has hitherto not been sufficiently acknowledged due to an absence of information on the spatial and temporal coverage of study sites. This paper therefore serves as a guide to high-quality pollen records that capture environmental variability during the last 2 millennia. We identify 60 vegetation (pollen) records from across South America which satisfy geochronological requirements set out for climate modelling, and we discuss their sensitivity to the spatial signature of climate modes throughout the continent. Diverse patterns of vegetation response to climate change are observed, with more similar patterns of change in the lowlands and varying intensity and direction of responses in the highlands. Pollen records display local-scale responses to climate modes; thus, it is necessary to understand how vegetation–climate interactions might diverge under variable settings. We provide a qualitative translation from pollen metrics to climate variables. Additionally, pollen is an excellent indicator of human impact through time. We discuss evidence for human land use in pollen records and provide an overview considered useful for archaeological hypothesis testing and important in distinguishing natural from anthropogenically driven vegetation change. We stress the …
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