A Geological Perspective on the “Irreversible Collapse” of the West Antarctic Ice Sheet


It’s “old” news…

Figure 1 Map showing dated locations used to resolve Holocene grounding-line retreat to its present position in the Ross Sea Embayment. Although the detailed structure of past grounding-line positions is unknown, dotted lines show the simplest grounding-line pattern consistent with the dates in the text. (Conway et al., 1999)

Figure 1
“Map showing dated locations used to resolve Holocene grounding-line retreat to its present position in the Ross Sea Embayment. Although the detailed structure of past grounding-line positions is unknown, dotted lines show the simplest grounding-line pattern consistent with the dates in the text.”
(Conway et al., 1999)

The history of deglaciation of the West Antarctic Ice Sheet (WAIS) gives clues about its future. Southward grounding-line migration was dated past three locations in the Ross Sea Embayment. Results indicate that most recession occurred during the middle to late Holocene in the absence of substantial sea level or climate forcing. Current grounding-line retreat may reflect ongoing ice recession that has been under way since the early Holocene. If so, the WAIS could continue to retreat even in the absence of further external forcing…

The collapse (retreat of the grounding line) began about 20,000 years ago. It is irreversible because “the WAIS could continue to retreat even in the absence of further external forcing” and there are no topographic obstacles to prevent it from flowing downhill into the ocean.

One has to wonder why this paper didn’t merit panic+stricken headlines in 1999

It’s the same story, just from the other side of the peninsula.

 


Reference
H. Conway et al, 1999. Past and Future Grounding-Line Retreat of the West Antarctic Ice Sheet. Science 8 October 1999: Vol. 286 no. 5438 pp. 280-283
DOI: 10.1126/science.286.5438.280

(Full text available with registration.)

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One Response to “A Geological Perspective on the “Irreversible Collapse” of the West Antarctic Ice Sheet”

  1. Corey Park scam Says:

    Corey Park scam

    A Geological Perspective on the “Irreversible Collapse” of the West Antarctic Ice Sheet | Debunk House

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