Tag Archives: Professor Julian Dowdeswell

THE SCOTT POLAR RESEARCH INSTITUTE – Continued

18 Jul

From its official beginning in 1934, the Institute’s aim has been to increase understanding of the polar regions through research and publication and to educate new generations of polar researchers; to make its collections accessible to the public and to project the history and significance of the polar regions to a wide audience.

As was recorded in the first section of this blog, in 1934 the Institute’s income was small – its activities depended heavily on Professor Frank Debenham, with one assistant, a Research Fellow and volunteer helpers.
The essential importance of both Polar Regions was recognized. In the Arctic military posts, weather and radar stations and airfields were already built and the possibilities and needs for transport, trade and mining (advocated strongly to the government by William Speirs Bruce as late as the 1920s – advice that was ignored), were apparent. In the Antarctic conflicting claims over control occupied political minds – Britain had a considerable interest -Edward Bransfield sighted, roughly mapped and claimed the Northern part of the Peninsula, in 1820 Robert Falcon Scott and Ernest Shackleton had laid claim to parts of East Antarctica – the Australian explorer, Douglas Mawson had charted and claimed hundreds of miles of previously unmapped Antarctic coast line for the British Empire in his expeditions of 1914. Later, in 1936 Mawson led the British, Australian and New Zealand expedition the Banzare expedition which made claims over the Antarctic coastline closest to Australia, from 45°E to 160°E (later becoming the Australian Antarctic Territory). But no permanent bases had been established on the continent.
The Institute was occupied by the Admiralty during the war years 1939-1945. Its founding Director, Professor Debenham, was against the facility being occupied and stayed away from the Institute throughout the war and the Institute was transmuted to become became a sub-centre for Naval Intelligence, led from 1937 by James Wordie, Chair of the Committee of Management. Wordie advised an Interdepartmental Committee on all matters of policy and the Institute became a centre for research into cold weather warfare, clothing and equipment and produced geographical handbooks for the Admiralty – its library and map facilities ware enlarged.

In these war years, plans with far reaching implications for Antarctica were hatched by the British Government in which the Institute played a key role. The strategic necessity for a British presence on the continent was obvious – Argentina and Chile were making claims and in 1939 the United States established the US Antarctic Services expedition to the continent led by Admiral Richard Byrd, This was intended to be a permanent occupation. In the Institute, Wordie and Neil Mackintosh (both experienced polar experts and explorers), played a key role in an important venture, Operation Tabarin. The official description of the operation was that Tabarin was monitoring Axis surface ships and submarines and ‘looking for raider hideouts’ that would threaten Allied shipping. Its actual role however was to establish bases from which to administer the British Antarctic claim and so strengthen her hold to the area known as the Falkland Islands Dependencies (FID). The FID had been established through “Letters Patent” in 1908 (as amended in 1917) covering an area containing the South Orkney Islands, the South Shetlands, the South Sandwich Islands, South Georgia and Graham Land.

Operation Tabarin was the start of permanent occupation of Antarctica by Britain, it was always a civilian operation whose twin tasks were to preserve the claim and to carry out scientific research. Competing claims and the threat of cold war confrontation led, in the late 1950s, to search for effective arrangements for governance of the continent. This led in 1959 to the outstandingly successful Antarctic Treaty which was ratified in 1961. This reserved the Continent for peace and science, fostered international collaboration, banned nuclear testing or dumping and placed existing territorial claims to one side, whilst requiring that the signatories agree to make no further territorial claims. From the original 12 signatories there are now 29 full consultative parties to the Treaty whilst another 25 nations have acceded to it, but do not play a formal role in the governance of the continent. There are over 70 separate stations, some in permanent operation and the rest in operation only during the summer season.

Professor Debenham retired in 1946. He was succeeded by the Reverend Launcelot Fleming, and, in 1949 by Dr. Colin Bertram. The first full-time Director, Dr. Gordon Robin, was appointed in 1958. As the Institute developed post war it attracted senior ‘scholars’ from overseas and quickly became a recognised international centre for research and reference. It was enlarged to accommodate these burgeoning requirements on several occasions: in 1946 the rent from the Admiralty lease and a small grant from the Treasury allowed for extensions of offices, laboratories and the provision of a lecture theatre. In 1960, the Ford Foundation made a generous donation of nearly $300,000, a sum that allowed for further extension of the archives and map collection and a picture library. In the 1990s the Shackleton Library, named for Sir Ernest Shackleton and his son Sir Edward (Later Lord) Shackleton was built. It included a major extension of the archives and map collection plus a picture library and was opened by the Honourable Alexandra Shackleton, Edward Shackleton’s daughter. This development won one of the four awards given by the Royal Institute of British Architecture to the Easter Region.
In 2010, the centenary of Terra Nova, the Polar Museum was refurbished and reopened in June by the
Earl and Countess of Wessex and the museum was shortlisted for the Art Fund’s Museum of the Year
Prize in 2011.
Awards kept coming! In 2014, the centenary of Shackleton’s Imperial Trans-Antarctic Expedition, the Heritage Lottery Fund, through its Collecting Cultures Programme, awarded £50,000 to the Institute for its By Endurance We Conquer Shackleton Project. The aim of the project was to allow for the four sections – museum, archive, library and picture library to combine in both purchasing Shackleton memorabilia and to promote Shackleton even more widely to the public.
So what of the Institute’s activities now? The first thing to say is that it is an exciting place to visit.
There is always a buzz when I go there. The Institute is a favorite venue for schools as well as
national and international visitors. Since 1957, it has been part of Cambridge University’s Teaching
and Research Programme and is a sub-department of the Department of Geography. The University Grants Committee provides its main financial support.
The museum is on the ground floor. It is an Aladdin’s cave of exhibits: there is a section on the
Antarctic in addition to a collection of indigenous objects from the Arctic regions. There are polar oil
paintings, watercolours and sketches, and more watercolours by Dr. Edward Wilson (of the Discovery
and Terra Nova expeditions), on British birds. There is a flag collection, models of famous polar ships, a scrimshaw collection and examples of Inuit art – enough to keep the enthusiast happy for hours as well as to interest the most casual of visitors. The library claims to house the world’s most comprehensive polar collection. Its archive is named the Thomas H Manning Archive (after the British-Canadian Arctic explorer who, amongst other sorties, led the British Canadian Arctic Expedition of 1936-1941). In the archive are hundreds of well –catalogued manuscripts relating to all aspects of research, explorers and exploration. Here researchers from all over the world, including myself, can spend many hours unraveling the arcane details of their chosen subjects and one of the pleasures of such a visit is in meeting with this diverse group. There is also a Picture Library which houses a vast array of Arctic and Antarctic photographs.
Research plays a pivotal contribution in the Institute which states that its projects, often interdisciplinary, cover aspects of the environmental sciences, social sciences, arts and humanities that are of relevance to the Arctic and Antarctica. The Institute states that ‘it has taken advantage of its role within the University of Cambridge to establish itself as an academic centre where problems of polar research can be studied, free from the demands of expedition administration, of governmental decision making, or of economic pressures’ and that this is this way, it believes, it can contribute most effectively. The list of subjects studied is daunting, for example: the Glacimarine Environments Group (dynamics of ice-sheets and delivery of sediment to the marine environment) The Polar Landscape and Remote Sensing Group (processes which modify the polar and sub-polar environments), Polar Social Science and Humanities Group (covering the anthropology, history and art of the Arctic).
One fascinating recent study, led by Professor Julian Dowdeswell, the Institute Director, investigated the patterns of wave-like ridges on the ocean floor to the east of the Antarctic Peninsula. These ridges are about 1.5 met res high and 20 metres wide, and were formed roughly 12,000 years ago (the last glacial maximum)! An autonomous underwater vehicle ‘lying’ 60 metres (197 feet) above the ocean floor recorded these wave- like ridges, which were produced when grounded ice sheets (the buttresses that stop ice flowing from inland) began to float free and these dropped into the sea-floor sediment – their shapes being influenced by the movements of the tides.
Changes in the positioning of the ridges indicated shrinkage in the grounded ice sheets by as much as 50 metres (more than 160 feet) a day. Importantly, this shrinkage ( from 12,000 years ago), is greater than has been measured in recent years, i.e. we now know that the ice is capable of retreating at speeds far higher than what we see today and the fear is that should climate change continue to weaken the ice- shelves in the next few decades, we could see similar rates of retreat. This would, of course have profound implications for global sea-level rise.
The Polar Record began life in 1930 as the Institute’s learned journal. It is published twice yearly and is essential reading for polar enthusiasts — each edition contains a review of all the major events in the polar regions during the previous six months and includes peer reviewed and authoritative articles on any subject of topical Polar interest. It is the journal that promotes the Institute to a wide international audience.
All in all, Professor Debenham would feel that the Institute lives up to all his far sighted original ambitions and aims.

1) Glacial Maximum refers to the peak of an ice age when the geographical extent of the ice sheet is at its maximum. Dowdswell’s result shows that the Antarctic Ice cap spread far out over what is now the Weddell Sea with the ice, extending right down to what is now the sea bed. As the ice started to retreat the ice front moved poleward creating the steps seen on the sea bed.

THE WEDDELL SEA AGAIN

2 Jan

Happy New Year!!

This January, Professor Julian Dowdeswell of the Scott Polar Research Institute will lead an international research team in the long planned expedition to the Weddell Sea. This expedition aims to investigate ice shelves around the Weddell Sea, particularly the Larsen C Ice Shelf. It also hopes to locate the wreck of Shackleton’s ship Endurance, which sank in the area in 1915.

The expedition’s progress and achievements will be followed internationally – in addition the Royal Geographical Society has created an educational programme aimed at engaging the interest of children from primary level upwards.

The Weddell Sea was discovered in 1823 by James Weddell, the British sea captain/ sealer, who sailed as far south as 74°15´S. It is a vitally important ecosystem – penguins, seals, whales, krill, corals and sponges thrive there. It is shaped as a huge bay; Coats Land (discovered by William Speirs Bruce in 1904) is at one extremity, the Antarctic Peninsula is on the other. It has been described as ‘the most treacherous and dismal region on earth’.[i]

An important aim will be to investigate the shapes of the ice shelf bases. Ice shelves stop ice from flowing outwards from the continent. Thinning of the ice shelves results in increased flow from the interior, which, in turn, causes a rising global sea level. The sea floor will be examined to assess the stability of the ice shelf.

Although the general circulation of oceans is determined by wind driven currents, the Weddell is one of few locations where deep and bottom water masses contribute to global thermohaline circulation. Bottom water is the lowest water mass with distinct characteristics in terms of physics, chemistry, and ecology and a temperature of -0.7 °C or colder. The thermohaline circulation is the motor of deep ocean currents and is driven by density gradients influenced by surface heat and freshwater fluxes. The description relates to thermo- temperature-and –haline, salt content.

The Larsen Ice Shelf, in the northwest part of the Weddell Sea, is named after Captain Carl Anton Larsen, master of a Norwegian whaling vessel who sailed along the ice front as far as 68°10′ S. in 1893. From north to south segments of the shelf are called Larsen A, B, and C (the largest), and Larsen D, E, F and G.

The 2019 expedition is focused on the Larsen C ice shelf from which a giant ice berg calved off in July 2017 (twice the area of Luxembourg), reducing the size of the iceshelf by approximately12%.

 

 

 

Dowdeswell and Shears[ii] explain in the ‘Geographical’ that measurements will be taken of salinity and temperature of the sea adjacent to the shelves, samples of marine life will be obtained and the sea ice thickness will be measured by aerial drones. Autonomous Underwater Vehicles will make echo soundings of the underwater shape of the ice shelf base, the roughness of which is a vital parameter in numerical modelling of future ice shelf stability. Ernest Shackleton’s Ship will be searched for.

Whether the team will be able to achieve these aims is uncertain — the conditions are so unpredictable that attempts to navigate south could be unsuccessful, but this expedition is of pivotal importance in attempting to obtain long-term prognostic information relating to global warming. I hope this important analysis of the Weddell Sea will be successfully accomplished.

[i] Henry, T.R.,1950,The White Continent

[ii] Dowdeswell, J. Shears, J. 2019, Geographical, p.10

 

 

 

 

Finding Shackleton’s Endurance

5 Jun

FINDING SHACKLETONS ‘ENDURANCE’

 

Recently a Victorian merchant vessel, the ‘West Ridge’, lost off the west coast of Australia over 100 years ago, was located during the search for the still tragically missing MH370, which disappeared whilst flying from Malaysia to China, in March 2014.

‘West Ridge’ ship wreck found 12000ft beneath Southern Indian Ocean December 2015

Area of Southern Indian Ocean where West Ridge, a barque lost in July 1883

credit:Australian Transport  Safety bureau /ATP/Getty

 

 

Now it is hoped that the final location of another lost ship, Shackleton’s Endurance, will be found on the seabed of the Weddell Sea as a part of an expedition that has, primarily, important scientific aims.

As is well known, Shackleton’s ship became trapped in the icy grip of the Weddell Sea in February I915. She drifted slowly and helplessly in a clockwise direction around the Weddell until October 1915, when the pressure of the sea ice started to crush the stern, and the sea finally poured in. The crew had to abandon ship to begin their precarious existence on ice flows.

Endurance sank on November 1915 – ‘She’s going boys’

 

October 1915 Endurance being crushed in the Weddel Sea – Sank in November 1915

credit : Frank Hurley

The proposed expedition aims to increase scientific information about the continent.

Glaciologists, geologists, geophysicists, marine biologists and oceanographers make up the team, which comes from, I understand, the Scott Polar Research Institute (SPRI), the Nekton Foundation, the University of Oxford, the University of Canterbury (New Zealand) and the University of Cape Town. The scientists will examine marine life in the Weddell Sea, and study the exposed cavities that lie beneath the Larsen C. ice shelf, one of the largest ice shelves in Antarctica, following the breakaway, in July 2017, of Iceberg A-68.

Professor Julian Dowdeswell, Director of SPRI, says that the study is relevant to all the ‘fringes’ of Antarctica and the ice shelves around it. Ice shelves are part of what secures the ice flow from the interior, if they break off, the interior ice flows faster. This is of general concern, because interior ice flows contribute to global sea level rise.

The Weddell Sea expedition will start in January 2019, (when sea ice is at its thinnest). Agulhas11 an icebreaking polar supply and research vessel will sail into the western part of the Weddell Sea, which has actually only been visited rarely since Endurance sank there in 1915.

The work will focus on the area in and around Iceberg A-68; the iceberg that broke off. It is massive, it has a surface area of 2,240 square miles (5,800 square kilometers), about four times the size of London!

Also cavities under the shelf of Larsen C itself will be explored, the seafloor mapped, and the overhanging ice canopy investigated. Samples of ice will be extracted from the shelf. These can be read (like tree rings) to see the ebb and flow of the ice over time. Because A-68 split off, there is concern as to whether Larsen C may be prone to collapse and the expedition aims to establish the past history of ice advance and retreat, to see if old grounding lines – the locations where Larsen’s feeding glaciers previously rested on the seafloor, have moved backwards and forwards on a fairly regular basis, or only retreated. In this way it is hoped to put the recent changes at the peninsula into longer-term context.

The Captain of Endurance, New Zealander Frank Worsley, was a navigator of enormous experience. He subsequently navigated the James Caird, a twenty-five foot boat, through the turbulent waves of Drake’s Passage and the South Atlantic, for 800 miles from Elephant Island to South Georgia. Only three sightings of the sun could be made on this sail. When Endurance sank in 1915, Worsley recorded her position as 68˚39′ 30.0″S. 52° 26′ 30.0″W, but locating the ship poses considerable challenges – she is 10,000 feet below the sea surface, the ice conditions on the surface can vary greatly from year to year, also the state of the ship will be poor, though it is thought that the hull will be reasonably intact.

If Endurance is found she will be surveyed, photographed and filmed. Undersea drones will document any marine life. The expedition obviously aims to record Endurance’s exact location, so the wreck can be listed as a historic monument under the Antarctic Treaty. Nothing will be removed from the site if the ship is found.

This is an important expedition with important implications. Finding Endurance would be a bonus, though it is interesting to consider whether Shackleton would have preferred to let her remain undisturbed.

 

Tags ‘West Ridge’, ‘Endurance’, Professor Julian Dowdeswell,  Frank Worsley, ‘James Caird’, Larsen C, Iceberg A-68, ‘Agulhas II’, South Georgia.

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