Is the breakaway of the Larsen C Iceberg normal?

my question:
Fact: A massive iceberg weighing more than one trillion tons has broken away from western Antarctica
Speculation: Global Warming

My Question: In 1911 – the Titanic sank due to icebergs in the shipping lanes – was this Global Warming? Probably not?
Speculation: It seems icebergs break away are normal


Asked by Greg,


Hi Greg,

You are completely right that iceberg calving is a completely normal process in Antarctica. Antarctica loses about 1089 Gt of ice per year through calving icebergs – exceeded only by basal melt.

This iceberg is unusually large, but we cannot attribute its calving event directly to climate change. We could only do this if we saw a sustained increase or change in calving behaviour over a long period of time, and were able to exclude dynamic factors that can cause changes in calving behaviour.

We are concerned that the calving of the iceberg might destablise Larsen C Ice Shelf and make it more vulnerable however – more information here.


I am a Senior Lecturer at Newcastle Univeristy, specialising in glaciology and glacial geology. I wrote and developed the website as part of an ongoing commitment to outreach, education and research impact. Read more about me at

Leave a Reply

Your email address will not be published.

This site uses Akismet to reduce spam. Learn how your comment data is processed.

This site uses cookies. Find out more about this site’s cookies.