Distributed Observing Networks of the Past: Using Archaeological Sites to Study Global Change

Abstract:

The Arctic is changing rapidly, and there is much concern over what the effects of those changes might be. Although changes of considerable magnitude have happened in the past, current understanding of Arctic systems is not yet sufficient to enable useful predictions. Scientific observations span a very limited period in the Arctic, and do not encompass even fairly recent (Little Ice Age, Medieval Climate Anomaly) periods of climate change. One way to address this would be to extend the period of observation, but the situation is urgent. As an alternative, various types of proxy data can serve a similar function. It is suggested that archaeological sites with good organic preservation are not only sources of data on past human behavior and cultural organization, but also valuable resources for paleoenvironmental reconstruction, with potential similar to other paleoenvironmental proxy records. The sites tend to be located at or near places that are still occupied today, thus providing locally relevant data. They also tend to incorporate the same range of species that are important for subsistence and food security today, so that one can examine how changes affected those species in the past in a fairly direct manner. Yet, just as new methods increase our ability to retrieve and study this information, global climate change poses a dire threat, both to the wealth of organic data in such sites, and to many of the sites themselves. Global change-related threats including increased coastal erosion and the warming and thawing of permafrost are major and imminent threats to the archaeological and paleoecological record.