A team of four British Antarctic Survey (BAS) engineers has returned to
the UK after completing a grueling journey to one of the most remote
and hostile locations on the planet to put in place equipment and
supplies for an ambitious project later this year. Enduring temperatures
of minus 35°C the Subglacial Lake Ellsworth 'Advance Party' has
successfully paved the way to explore an ancient lake buried beneath 3
km of Antarctic ice. A powerful 'tractor-train' towed nearly 70 tonnes
of equipment across Antarctica's ice over deep snow and steep mountain
passes.
This December a science and engineering team will make the 16,000 km
journey from the UK to collect water and sediments from the buried lake.
Lake Ellsworth will be the first Antarctic subglacial lake to be
measured and sampled directly through the design and manufacture of
space-industry standard 'clean technology'. Scientists have been
planning for more than 15 years to access the lake, which is one of more
than 400 known subglacial lakes in Antarctica, in the quest to yield
new knowledge about the evolution of life on Earth and other planets.
Lake-bed sediments could also provide vital clues about Earth's past
climate. Through a bore hole, drilled using high-pressure hot water, the
team will lower a titanium probe to measure and sample the water,
followed by a corer to extract sediment from the lake.
The Advance Party team paved the way for this mission by transporting
the drilling equipment more than 250 km through the Ellsworth Mountain
range, over deep-snow terrain and crevasses to the Lake Ellsworth
drilling site. The final leg of this journey was the most challenging
and required powerful tractors to tow heavy containers of equipment on
sledges and skis, forming a 'tractor-train'. The soft, deep snow and
concrete-hard 'sastrugi' snow forms caused the Advance Party's progress
to slow, but after three days they safely reached the Lake Ellsworth
drilling site.
Andy Tait, Advance Party Member and Hot Water Drill Designer /
Engineer from BAS says, "Lake Ellsworth is extremely remote, cold and
hostile -- ambient temperatures dropped to −35°C and with wind chill
they dropped further still making living and working on site a physical
challenge. We deliberately located the equipment over a kilometer
(1.7km) from the drill site to protect it during the harsh Antarctic
winter. We will move it to its final position and set up the rig ready
for drilling in December.
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