More WAIS (W. Antarctica) instability?

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SUMMARY

The discussion focuses on the instability of the West Antarctic Ice Sheet (WAIS), highlighting that the primary factor is not atmospheric warming but rather a deep ocean current affecting the continental shelf near the glacier's mouth. This warm water is undercutting the ice and facilitating its flow due to a lack of protective sea ice. The conversation suggests that this phenomenon may signal the onset of a Heinrich event, which is typically not linked to warming trends.

PREREQUISITES
  • Understanding of ocean currents and their impact on glacial dynamics
  • Knowledge of the West Antarctic Ice Sheet (WAIS) and its significance
  • Familiarity with Heinrich events and their geological implications
  • Awareness of the relationship between sea ice and glacial stability
NEXT STEPS
  • Research the effects of deep ocean currents on glacial melting
  • Study the characteristics and historical context of Heinrich events
  • Examine the role of sea ice in stabilizing ice sheets
  • Explore current climate models predicting changes in WAIS dynamics
USEFUL FOR

Climate scientists, glaciologists, environmental researchers, and policymakers interested in the implications of ice sheet instability and oceanic influences on climate change.

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see http://news.bbc.co.uk/2/hi/science/nature/7261171.stm"
 
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Earth sciences news on Phys.org
You wouldn't believe this:

The reason does not seem to be warming in the surrounding air.

One possible culprit could be a deep ocean current that is channelled onto the continental shelf close to the mouth of the glacier. There is not much sea ice to protect it from the warm water, which seems to be undercutting the ice and lubricating its flow.

We may be witnessing the beginning of a Heinrich event, generally not associated with warming.

http://www.nature.com/nature/journal/v434/n7037/full/nature03544.html are known from Antarctica as well
 
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