Journal
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
Volume 374, Issue 2059, Pages -Publisher
ROYAL SOC
DOI: 10.1098/rsta.2014.0301
Keywords
Cenozoic; palaeoclimate; ice sheets; sea level; subglacial; geology
Categories
Funding
- Rutherford Discovery Fellowship [RDF-13-VUW-003]
- Ministry of Business, Innovation, and Employment (MBIE) [C05X1001]
- New Zealand Ministry of Business, Innovation & Employment (MBIE) [C05X1001] Funding Source: New Zealand Ministry of Business, Innovation & Employment (MBIE)
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Mounting evidence from models and geological data implies that the Antarctic Ice Sheet may behave in an unstable manner and retreat rapidly in response to a warming climate, which is a key factor motivating efforts to improve estimates of Antarctic ice volume contributions to future sea-level rise. Here, we review Antarctic cooling history since peak temperatures of the Middle Eocene Climatic Optimum (approx. 50 Ma) to provide a framework for future initiatives to recover sediment cores from subglacial lakes and sedimentary basins in Antarctica's continental interior. While the existing inventory of cores has yielded important insights into the biotic and climatic evolution of Antarctica, strata have numerous and often lengthy time breaks, providing a framework of 'snapshots' through time. Further cores, and more work on existing cores, are needed to reconcile Antarctic records with the more continuous 'farfield' records documenting the evolution of global ice volume and deep-sea temperature. To achieve this, we argue for an integrated portfolio of drilling and coring missions that encompasses existing methodologies using ship-and sea-ice-/ ice-shelf-based drilling platforms as well as recently developed seafloor-based drilling and subglacial access systems. We conclude by reviewing key technological issues that will need to be overcome.
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