@article{fd4ca869bca74d6192e8a33d6a4c3070,
title = "Offshore-onshore record of Last Glacial Maximum−to−present grounding line retreat at Pine Island Glacier, Antarctica",
abstract = "Pine Island Glacier, West Antarctica, is the largest Antarctic contributor to global sea-level rise and is vulnerable to rapid retreat, yet our knowledge of its deglacial history since the Last Glacial Maximum is based largely on marine sediments that record a retreat history ending in the early Holocene. Using a suite of 10Be exposure ages from onshore glacial deposits directly adjacent to Pine Island Glacier, we show that this major glacier thinned rapidly in the early to mid-Holocene. Our results indicate that Pine Island Glacier was at least 690 m thicker than present prior to ca. 8 ka. We infer that the rapid thinning detected at the site furthest downstream records the arrival and stabilization of the retreating grounding line at that site by 8−6 ka. By combining our exposure ages and the marine record, we extend knowledge of Pine Island Glacier retreat both spatially and temporally: to 50 km from the modern grounding line and to the mid-Holocene, providing a data set that is important for future numerical ice-sheet model validation.",
author = "Nichols, {Keir A.} and Rood, {Dylan H.} and Venturelli, {Ryan A.} and Greg Balco and Adams, {Jonathan R.} and Louise Guillaume and Seth Campbell and Goehring, {Brent M.} and Hall, {Brenda L.} and Klaus Wilcken and John Woodward and Johnson, {Joanne S.}",
note = "Funding information: This work is from the Geological History Constraints (GHC) project, a component of the International Thwaites Glacier Collaboration (ITGC). This work forms part of the British Antarctic Survey (BAS) Polar Science for a Sustainable Planet program, funded by the Natural Environment Research Council (NERC). We acknowledge support from NSF (grant OPP 2317097) NERC (grants NE/S006710/1, NE/S006753/1, and NE/S00663X/1). This research was also supported by the Centre for Accelerator Science at the Australian Nuclear Science and Technology Organisation (ANSTO) through the National Collaborative Research Infrastructure Strategy (NCRIS). We acknowledge the support of ANSTO award AP12872 to D.H. Rood. We are grateful for technical support from Mark Evans, BAS Operations & Logistics Teams, and Rothera Research Station for field input and support to J.S. Johnson and J. Woodward in the 2019–2020 Antarctic season, and BAS Field Guide Tom King for help and support with sample collection. We thank Adrian Fox, Nathan Fenney, Elena Field, and Andrew Fleming (BAS Mapping and Geographic Information Centre) for support with global positioning system (GPS) data, satellite imagery, and field maps. We also thank James Smith (BAS) for fruitful discussions about marine geologic data. This is ITGC contribution ITGC-106.",
year = "2023",
month = nov,
day = "1",
doi = "10.1130/G51326.1",
language = "English",
volume = "51",
pages = "1033--1037",
journal = "Geology",
issn = "0091-7613",
publisher = "Geological Society of America",
number = "11",
}