25 Mar 2013

Our Changing World - Antarctic Voyage

From Jesse Mulligan, 1–4pm, 3:34 pm on 25 March 2013

Three summers ago, a massive iceberg broke off the tongue of the Mertz Glacier in Antarctica, triggering changes to sea ice conditions in the region. This area is one of three important places around the frozen continent where heavy and salty seawater is produced - and as it sinks to the bottom it kicks off global ocean currents. NIWA's research vessel Tangaroa just returned from a six-week voyage to the area, and Veronika Meduna meets oceanographer Mike Williams and marine geologist Helen Bostock to find out what impact the changes have had.