Collaborative Research: Response of Carbon Accumulation in Moss Peatbanks to Past Warm Climates in the Antarctic Peninsula

The work will extend understanding of climate controls on peat carbon accumulation to Antarctic peatbanks thus enabling a bi-polar perspective of ?first responder? ecosystem processes under warmer climate conditions. Understanding climate and ecosystem histories will help reveal processes and mechanisms that control the functioning of these and other polar ecosystems.

Specifically, the investigators will evaluate outcomes of natural climate-warming experiments that have occurred in the AP region at 65 degrees south over the last 1000 years. They will focus on two warm climate intervals in the Western Antarctic Peninsula: (1) the recent and ongoing warming of up to 6°C in the last century, and (2) the Medieval Warm Period that occurred ~800 years ago. By collecting and analyzing peat cores and other biological and environmental data, the investigators will derive an independent temperature reconstruction from oxygen isotopes of moss cellulose over the last 1000 years to assess peatbank carbon response to documented warm climate conditions.