This site uses cookies. By continuing to use this site you agree to our use of cookies. To find out more, see our Privacy and Cookies policy.
Skip to the content

[IOP] A community website from IOP Publishing

environmentalresearchweb blog

DACA-13: from ice drift to ice cliffs

By Liz Kalaugher

In the central Arctic the speed of sea ice drift shows both a seasonal cycle and a long-term trend. Now, Einar Olason of the Max Planck Institute for Meteorology in Hamburg reckons he’s discovered three regimes that govern drift, depending on the time of year.

As he detailed at DACA-13 in Davos, between June and November mean ice drift speed varies with ice concentration, with ice tending to move faster as its concentration decreases. From December to March drift speed is inversely linked to ice thickness. And in April and May, when both ice thickness and concentration are constant, it’s fracture formation that makes the difference by weakening the ice cover and causing it to move more speedily.

The long-term trend in sea ice drift speed apparent in August, September and October seems to be linked to sea ice concentration.

Rob DeConto of the University of Massachusetts, meanwhile, believes that adding marine ice cliff failure into Antarctic ice-sheet models could help account for the ten metres or so of sea-level rise in the Pliocene around 3 million years ago that the models can’t reproduce.

This entry was posted in DACA-13 and tagged . Bookmark the permalink.
View all posts by this author 

Leave a comment

Your e-mail address will not be published.

Guidelines

  • Comments should be relevant to the article and not be used to promote your own work, products or services.
  • Please keep your comments brief (we recommend a maximum of 250 words).
  • We reserve the right to remove excessively long, inappropriate or offensive entries.

Show/hide formatting guidelines

Tag Description Example Output
<a> Hyperlink <a href="http://www.google.com">google</a> google
<abbr> Abbreviation <abbr title="World Health Organisation" >WHO</abbr> WHO
<acronym> Acronym <acronym title="as soon as possible">ASAP</acronym> ASAP
<b> Bold <b>Some text</b> Some text
<blockquote> Quoted from another source <blockquote cite="http://iop.org/">IOP</blockquote>
IOP
<cite> Cite <cite>Diagram 1</cite> Diagram 1
<del> Deleted text From this line<del datetime="2012-12-17"> this text was deleted</del> From this line this text was deleted
<em> Emphasized text In this line<em> this text was emphasised</em> In this line this text was emphasised
<i> Italic <i>Some text</i> Some text
<q> Quotation WWF goal is to build a future <q cite="http://www.worldwildlife.org/who/index.html">
where people live in harmony with nature and animals</q>
WWF goal is to build a future
where people live in harmony with nature and animals
<strike> Strike text <strike>Some text</strike> Some text
<strong> Stronger emphasis of text <strong>Some text</strong> Some text