The U.S. Antarctic Program (USAP) supports scientific research in Antarctica and provides operational research support. The NSF Office of Polar Programs Antarctic Sciences Section (ANT) supports research to: 1) expand fundamental knowledge of the Antarctic region, 2) improve understanding of interactions between the Antarctic region and global earth systems, and 3) utilize the unique characteristics of the Antarctic continent as an observing platform. Antarctic fieldwork is supported for research that can only be performed or is best performed in Antarctica. ANT encourages research using existing samples, data, and models that do not require fieldwork. ANT encourages research that crosses and combines disciplinary perspectives and approaches. Full proposal deadline: May 23, 2017.