Race to study mysterious marine ecosystem
8 Mar 2018 by qwqcdhhcbc.d qwqcdhhcbc.d
A team of scientists, led by the British Antarctic Survey is bound for Antarctica to investigate a mysterious marine ecosystem that’s been hidden beneath an Antarctic ice shelf for up to 120,000 years.
The iceberg known as A68, which is four times of London, calved off from the Larsen Ice Shelf in July 2017. The scientists will collect samples from the newly exposed seabed, which covers an area of around 5,818 km2. It is an urgent mission. The ecosystem that’s likely been hidden beneath the ice for thousands of years may change as sunlight starts to alter the surface layers of the sea.
Marine biologist Dr Katrin Linse from British Antarctic Survey is leading the mission. She says: “The calving of A68 provides us with a unique opportunity study marine life as it responds to a dramatic environmental change. It’s important we get there quickly before the undersea environment changes as sunlight enters the water and new species begin to colonise. We’ve put together a team with a wide range of scientific skills so that we can collect as much information as possible in a short time. It’s very exciting.”
This newly exposed marine area is the first to benefit from an international agreement made in 2016 by the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR). This agreement designates Special Areas for Scientific Study in newly exposed marine areas following the collapse or retreat of ice shelves across the Antarctic Peninsula region.
Professor David Vaughan, Science Director at BAS says: “Now is the time to address fundamental questions about the sustainability of polar continental shelves under climate change. We need to be bold on this one. Larsen C is a long way south and there’s lots of sea ice in the area, but this is important science, so we will try our best to get the team where they need to be.”
While the team mobilises for the expedition, glaciologists and remote sensing specialists continue to monitor the movement of the Larsen C Ice Shelf. In December 2017, a team from University of Leeds worked on the remaining ice shelf to investigate changes in ice structure after the calving event, to be able to predict shelf stability in the future.
