English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

. The Antarctic ice sheet extent in the Weddell Seaembayment (WSE) during the Last Glacial Maximum (LGM; ca. 19–25 calibratedkiloyears before present, ka cal BP) and its subsequent retreat from theshelf are poorly constrained, with two conflicting scenarios beingdiscussed. Today, the modern Brunt Ice Shelf, the last remaining ice shelfin the northeastern WSE, is only pinned at a single location and recentcrevasse development may lead to its rapid disintegration in the nearfuture. We investigated the seafloor morphology on the northeastern WSEshelf and discuss its implications, in combination with marine geologicalrecords, to create reconstructions of the past behaviour of this sector of theEast Antarctic Ice Sheet (EAIS), including ice–seafloor interactions. Ourdata show that an ice stream flowed through Stancomb-Wills Trough and actedas the main conduit for EAIS drainage during the LGM in this sector.Post-LGM ice stream retreat occurred stepwise, with at least threedocumented grounding-line still-stands, and the trough had become free ofgrounded ice by ∼10.5 ka cal BP. In contrast, slow-flowingice once covered the shelf in Brunt Basin and extended westwards towardMcDonald Bank. During a later time period, only floating ice was presentwithin Brunt Basin, but large “ice slabs” enclosed within the ice shelfoccasionally ran aground at the eastern side of McDonald Bank, forming 10unusual ramp-shaped seabed features. These ramps are the result of temporaryice shelf grounding events buttressing the ice further upstream. To the westof this area, Halley Trough very likely was free of grounded ice during theLGM, representing a potential refuge for benthic shelf fauna at this time.

Past ice sheet–seabed interactions in the northeastern Weddell Sea embayment, Antarctica