Ian Allison Browse All Authors Top 3 quotes by Ian Allison So it seems to be a major incident that has caused the contingency plans to fail as well as the primary system. Ian Allison company-news Sea ice conditions have remained stable in Antarctica generally. Ian Allison antarctica stable ice sea Ice shelves in general have episodic carvings and there can be large icebergs breaking off - I'm talking 100km or 200km long - every 10 or 20 or 50 years. Ian Allison ice talking long years