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Simulating Impacts of Ice Storms on Forest Ecosystems
06:27

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Published on: June 30, 2020

Ice-sheet response to oceanic forcing.

Ian Joughin1, Richard B Alley, David M Holland

  • 1Polar Science Center, Applied Physics Laboratory, University of Washington, 1013 NE 40th, Seattle, WA 98105, USA. ian@apl.washington.edu

Science (New York, N.Y.)
|December 1, 2012
PubMed
Summary
This summary is machine-generated.

Accelerating ice loss from Greenland and Antarctic ice sheets is linked to oceanic heat. Understanding these ice-ocean interactions is crucial for accurate sea-level rise projections.

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Area of Science:

  • Glaciology and Oceanography
  • Climate Change Science
  • Sea-Level Rise Research

Background:

  • Ice sheets in Greenland and Antarctica are experiencing accelerated ice loss.
  • This ice loss is significantly influenced by oceanic forcing, particularly on floating ice shelves.
  • A direct correlation exists between increased oceanic heat delivery to ice sheet margins and heightened ice loss.

Purpose of the Study:

  • To investigate the mechanisms driving ice loss in Greenland and Antarctica due to oceanic heat.
  • To address the lack of rigorous quantification of ice-ocean processes in Antarctica.
  • To overcome challenges in understanding and modeling ice-ocean interactions in Greenland's ice-choked fjords.

Main Methods:

  • Analysis of recent observational data linking oceanic heat delivery to ice loss.
  • Review of existing understanding and quantification of ice-ocean processes in Antarctica.
  • Discussion of experimental difficulties in instrumenting Greenland's fjords with actively calving glaciers.

Main Results:

  • A clear correspondence between increased oceanic heat and increased ice loss is established.
  • Antarctic ice-ocean processes are generally understood but lack rigorous quantification.
  • The specific processes driving Greenland's ice retreat due to warmer oceans remain elusive.

Conclusions:

  • Significant challenges persist in fully understanding and modeling ice-ocean-atmosphere interactions for both ice sheets.
  • Accurate sea-level projections require the development of fully coupled climate models.
  • Further research and improved experimental techniques are needed to quantify these critical processes.