Adelaide Island
Chilean Antarctic claims .
HistoryAdelaide Island was discovered in 1832 by a British expedition under John Biscoe.[1] The island was first surveyed by the French Antarctic Expedition (1908–1910) under Jean-Baptiste Charcot. According to a contemporary source, the island was named by Biscoe himself in honour of Queen Adelaide of the United Kingdom, who earlier gave her name to the city in Australia .
The Island has two bases on it. The old Adelaide Island base (also known as Base T) was set up by the Falkland Islands Dependencies Survey (FIDS), which later became the British Antarctic Survey. The Base was closed due to an unstable skiway and operations were moved to the new Rothera Research Station during 1976-77; this base remains open. The old BAS base was transferred to the Chilean authorities in 1984, when it was renamed Teniente Luis Carvajal Villaroel Antarctic Base. The station was then used as a summer only station by the Chileans. However, the skiway and 'ramp' to the station from the plateau have all become so unstable that the Chilean Air Force (FACh) have ceased operating there. The Chilean Navy has visited the station almost every summer to ensure it is in good keeping. BAS employees also visit the station during the winter when access from the plateau is easier.
Due to the length of time that it has been inhabited the island is well mapped by Antarctic standards. GeologyDuring the GeographyRothera Station in November 2003, looking towards the Antarctic Peninsula A number of features on and around Adelaide Island have been charted by various Antarctic expeditions, primarily the French Antarctic Expedition of 1909, under Charcot. Cape Mascart forms the northernmost extremity of Adelaide Island, Antarctica, and is by the IHO regarded as the northernmost and easternmost border point of Bellingshausen Sea. It was discovered by Charcot's expedition, and named by him for French physicist Éleuthère Mascart.[3] On the island's east coast, Landauer Point, marks the west side of the north entrance to Tickle Channel. It was mapped by the FIDS from air photos taken by the Ronne Antarctic Research Expedition (RARE), 1947–48, and the Falkland Islands and Dependencies Aerial Survey Expedition (FIDASE), 1956–57. The point was named by the UK Antarctic Place-Names Committee (UK-APC) for Joseph K. Landauer, an American physicist.[4] To the south is Mothes Point, 7 nautical miles (13 km) southwest of The Gullet. It was mapped by FIDS from RARE photos, and FIDASE in 1956–57. It was named by UK-APC for German glaciologist Hans Mothes.[5] ,_Adelaide_Island,_Mackay_Point.JPG) Continuing south, is Mackay Point about 2 nautical miles (4 km) to the north-northeast of Wormald Ice Piedmont on the eastern side of Adelaide Island.
About 2 nmi (3.7 km) south is Rothera Point, marking the east side of the Ryder Bay. Rothera Point was named by UK-APC for FIDS surveyor John M. Rothera. On the southeast coast of the island, 5 nmi (9.3 km) east of submarine bank in the Bellingshausen Sea on the southern approaches to Ryder Bay.[10]
The southeast extremity of the island is Cape Alexandra, named by Charcot for Queen consort of England.[11]
The southwest extremity of the island is Cape Adriasola, a distinctive ice-cliffed cape. Charcot named it for an acquaintance in Punta Arenas. 10 nautical miles (19 km; 12 mi) southwest lies Avian Island.[12] Several rocks lie off Adriasola: 13 nautical miles (24 km) southwest is Cavalier Rock, named by UK-APC for Royal Navy helicopter pilot Geoffrey A. Cavalier.[13] Sorpresa Rock lies exposed to the southwest. Its name appears on a Chilean government chart of 1947, from "sorpresa", a Spanish word meaning "surprise".[14] See alsoReferences
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