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Coronation Island
Coronation Island
Coronation Island
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Coronation Island is the largest of the South Orkney Islands, 25 nautical miles (46 km) long and from 3 to 8 nautical miles (5.6 to 14.8 km) wide. The island extends in a general east–west direction, is mainly ice-covered and comprises numerous bays, glaciers and peaks, the highest rising to 1,265 metres (4,150 ft).[1]

Key Information

History

[edit]

The island was discovered in December 1821, in the course of the joint cruise by Captain Nathaniel Palmer, an American sealer, and Captain George Powell, a British sealer. Powell named the island in honour of the coronation of George IV, who had become king of the United Kingdom in 1820.[1]

Antarctic Specially Protected Area

[edit]

An area of some 92 km2 of north-central Coronation Island has been designated an Antarctic Specially Protected Area (ASPA 114), mainly for use as a relatively pristine reference site for use in comparative studies with more heavily impacted sites. It extends northwards from Brisbane Heights and Wave Peak in the central mountains to the coast between Conception Point in the west to Foul Point in the east. Most of the land in the site is covered by glacial ice, with small areas of ice-free terrain along the coast. Birds known to breed within the site include chinstrap penguins, Cape petrels and snow petrels.[2]

Major features

[edit]

Many geographic features on and around Coronation Island have been charted and named by various exploration and survey groups.

The island's northwest point is called Penguin Point.[3] Several named rock formations are located offshore just west of Penguin Point, including the Melsom Rocks, the Despair Rocks, and Lay-brother Rock.[4][5][6]

Bays

[edit]

The island's irregular coast is indented by a great number of bays.

Other features

[edit]

See also

[edit]

References

[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Coronation Island

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from Grokipedia
Coronation Island is the largest island in the archipelago, located in the northwestern of at approximately 60°38′ S, 45°35′ W. It extends 25 nautical miles (46 km) in length and 3 to 8 nautical miles (6 to 15 km) in width, rising to a highest of 1,265 m (4,150 ft) at Mount Nivea. The island is largely ice-covered, characterized by rugged terrain with numerous glaciers, bays, and peaks, and remains uninhabited. The island was discovered on 6 December 1821 by British sealer George Powell and American sealer Nathaniel B. Palmer, who named it "Coronation Isle" in honor of the recent coronation of King George IV of the on 19 July 1821. It was independently rediscovered in 1823 by British explorer , who charted parts of it and referred to it as Pomona or Mainland, after the principal island of the Islands in . Further surveys were conducted by Norwegian whalers Sørlle and Borge in 1912–13, and the island was recharted by the Discovery Investigations in 1933, with detailed topographic mapping by the Falkland Islands Dependencies Survey (now ) between 1956 and 1958. Geologically, Coronation Island consists primarily of low-grade metasedimentary rocks, intruded by granitic rocks and overlain by volcanic sequences, as detailed in surveys by the British Antarctic Survey. The island's landscape is dominated by ice, with more than 85% of the archipelago glaciated, contributing to its barren, mountainous profile. Key features include the Ross Glacier and several protected coastal areas. Ecologically, the island supports Antarctic wildlife, including seabird colonies such as Adélie penguins and significant moss communities in ice-free zones. Northern Coronation Island, encompassing an area of about 92 km² between Foul Point and Conception Point, is designated as No. 114 under the to preserve its pristine terrestrial and marine environments, ornithological values, and geological features. The region falls within the and is managed for scientific research and conservation.

Geography

Location and extent

Coronation Island is the largest island in the archipelago, situated in the at approximately 60°37′S 45°35′W and forming part of the . The archipelago itself lies at the northern margin of the , approximately 604 km northeast of the . The island measures 46 km in length from east to west and varies in width from 5.6 to 14.8 km, encompassing a total area of approximately 450 km². It extends in a general east-west direction and is the dominant landmass within the group, which has a combined area of about 620 km² and includes smaller islands such as —located just 1.5 km southwest of Coronation Island's southern coast near Cape Hansen—and the eastern Laurie Island. Surrounding the island, oceanographic conditions are heavily influenced by the , where seasonal dynamics play a key role in regional extent and fast-ice formation around the . The northern currents and ice export contribute to variable coverage, with long-term records indicating fluctuations in ice duration that affect accessibility and environmental stability in the area.

Topography and geology

Coronation Island features a rugged, predominantly ice-covered , with approximately 90% of its surface glaciated, leaving exposed rock primarily in coastal zones and on higher elevations. The landscape is characterized by numerous short glaciers that descend from the central highlands to form low but extensive ice cliffs along the coastline. These glaciers, often terminating in boulder-strewn beaches, shape much of the island's surface through ongoing and deposition. The highest point is Mount Nivea, reaching an elevation of 1,265 m, which overlooks glacial catchments draining northward. The island's geology is dominated by metamorphic rocks of the Scotia Metamorphic Complex, consisting mainly of gneisses, schists, and metasediments such as metagreywackes and metapelites. These rocks originated from Permian-Triassic protoliths that underwent regional up to during the , around 190 Ma, as part of a subduction-related along the proto-Pacific margin of . Detailed mapping and petrographic studies by the in the 1970s revealed two main deformational phases, with faults trending north-south and west-east cutting the complex. Key inland formations include prominent peaks such as Wave Peak (960 m) and the Brisbane Heights plateau (rising to about 960 m), which emerge as nunataks above the . Glacial valleys carve through the metamorphic , exposing layered schists and gneisses in elevated areas, while the ice cover conceals much of the underlying structure in lower regions. These features highlight the interplay between ancient tectonic processes and in shaping the current topography.

History

Discovery and naming

Coronation Island was first sighted on 6 December 1821 by British sealer George Powell aboard the Dove, who named it "Coronation Isle" in honor of the recent coronation of King George IV of the United Kingdom on 19 July 1821. It was independently sighted around the same time by American sealer Nathaniel Brown Palmer aboard the James Monroe. The next day, Powell landed near what is now known as Spine Island and formally claimed the island group for Britain in the name of King George IV. In January 1823, charted the islands during his voyage and renamed the main island Pomona (after the principal island of the group), but the earlier designation of Coronation Island was later restored and has persisted in official usage. This event occurred amid the intensive sealing expeditions of the early 19th century in waters, driven by commercial demand for sealskins, though Powell's visit involved no or extended occupation beyond the possession ceremony.

Exploration and research

The (1902–1904), led by William Speirs Bruce, marked one of the earliest systematic surveys of the , including visits to Coronation Island where expedition members conducted initial geological observations and contributed to the charting of the archipelago's coasts. Although detailed topographical mapping focused primarily on Laurie Island, the expedition's overall efforts provided foundational hydrographic data for the region, including coastal outlines around Coronation Island, through onboard surveys from the ship . Further surveys of the , including , were conducted by Norwegian whalers captained by Petter Sørlle and Emil Borge during 1912–13, focusing on whaling grounds and contributing early nautical charts. The islands were recharted in 1933 by the Discovery Investigations, a British program to study marine resources. Detailed topographic mapping of was carried out by the Falkland Islands Dependencies Survey (now ) between 1956 and 1958. In the mid-20th century, the (BAS) intensified scientific efforts in the during the 1960s and 1970s, conducting geological and biological studies that encompassed Coronation Island. A key outcome was the 1974 BAS Scientific Report No. 86, which presented a comprehensive geological analysis of Coronation Island based on fieldwork mapping its sequences and structural features. These investigations built on earlier surveys and supported broader Antarctic research programs under the emerging international framework. Recent human activities on Coronation Island remain limited owing to its remote location and harsh conditions, with no permanent research base established there; instead, BAS conducts ongoing environmental monitoring for the from the nearby , operational since 1947 on . The island has also been included in periodic inspections under the since its in 1961, verifying compliance with conservation and scientific protocols across the .

Natural features

Coastal features

The coastline of Coronation Island is characterized by an irregular profile shaped by numerous bays and inlets that indent the shoreline, providing sheltered areas amid the surrounding . These bays include Marshall Bay on the south coast, a 2-mile-wide indentation between Capes Vik and Hansen, which serves as a notable entry point along the southern margin. Further examples encompass Ommanney Bay on the north coast between Prong Point and Foul Point, contributing to the fragmented and varied coastal morphology. Such features result from glacial erosion and tectonic influences, creating a highly indented perimeter that contrasts with the island's overall east-west elongation. Prominent headlands and capes project into the sea, marking key navigational landmarks along the perimeter. Penguin Point forms the northwestern extremity of the island, serving as the entry to Tønsberg Cove and a prominent coastal projection. To the east, Conception Point stands as the northernmost tip, while Foul Point delineates the northeastern boundary near Ommanney Bay, both essential for charting the northern shoreline. These points, often steep and rocky, accentuate the rugged coastal outline and have been documented since early 19th-century surveys. Offshore, a series of isolated rock formations pose navigational challenges and support avian habitats. The Melsom Rocks, a group of isolated rocks, lie 2 miles north of Despair Rocks and 7 miles west of Penguin Point, acting as hazards in the approaches to the northwest coast. Despair Rocks, elevating to 30 meters, are positioned west of the main island and were charted during initial explorations in 1821. Lay-brother Rock, located 2 miles southwest of Despair Rocks and 7 miles northwest of Route Point, further complicates maritime passage off the western end. Glacier tongues and ice cliffs dominate much of the coastal fringe, where the island's extensive ice cover—encompassing the majority of its surface—terminates at the sea. Numerous short glaciers descend to the shoreline, forming low but wide ice cliffs that undergo periodic calving, releasing icebergs into adjacent waters. On the steep western coast, hanging glaciers and crevassed icefalls spill over, enhancing dynamic coastal processes through ongoing and marine interaction.

Inland features

The interior of Coronation Island is dominated by rugged, ice-covered terrain, with the highest elevations forming a central mountainous spine that rises sharply from surrounding glacial valleys. Mount Nivea, the island's highest peak at 1,265 meters, stands at the head of Sunshine Glacier and marks the apex of this highland region, its snow-capped summit often serving as a prominent landmark for surveys. Wave Peak, reaching 960 meters, rises precipitously from the head of Laws Glacier in the central area, contributing to the dramatic relief that characterizes the island's backbone. Brisbane Heights form a broad, ice-covered plateau extending in an arc across the west-central interior, with elevations up to approximately 920 meters, bounding the northern edge of a key protected glacial catchment. This plateau links major peaks and features nunataks—isolated rock outcrops protruding through the ice—such as those near Wave Peak, where albite-actinolite-epidote-schists are exposed, reflecting the island's metamorphic . Short valley glaciers, including the prominent Laws Glacier flowing southward and Sunshine Glacier, carve through the highlands, terminating in coastal ice cliffs while filling depressions with thick ice layers that create elevated domes in the central zone. Hydrographic features are minimal due to extensive glaciation, with no permanent streams present; instead, seasonal meltwater from surfaces and summer warming drains episodically into ice-filled valleys, supporting limited ephemeral flows toward the coast. These glacial catchments, such as those draining from Mount Nivea and Brisbane Heights northward, maintain the pristine ice environment of the interior.

Ecology

Fauna and flora

Coronation Island supports a diverse avifauna characteristic of the maritime , dominated by breeding colonies in coastal and cliff habitats. (Pygoscelis antarctica) form the primary breeding species, with large colonies on rocky shores and ice-free slopes; across the South Orkney Islands, BAS surveys estimate approximately 960,000 breeding pairs, many concentrated on Coronation Island as the largest landmass. Adélie penguins (Pygoscelis adeliae) also breed in significant numbers, with an archipelago-wide estimated at about 190,000 pairs as of 2014 (down from 257,000 pairs in 1984–1985), reflecting declines observed in BAS monitoring, including multiple colonies on the island's eastern and southern coasts. BAS long-term monitoring shows declines in Adélie and chinstrap penguin populations across the archipelago since the 1980s, attributed to climate change impacts on and prey availability (as of 2016 assessments). Cape petrels (Daption capense) nest in crevices along steep rock faces, while snow petrels (Pagodroma nivea) and southern giant petrels (Macronectes giganteus) occupy higher cliffs and inland nunataks, with the latter's regional declining by around 50% since the based on long-term BAS monitoring at nearby . Marine mammals are represented by pinnipeds that haul out on surrounding ice floes and beaches, including Weddell seals (Leptonychotes weddellii), crabeater seals (Lobodon carcinophaga), and leopard seals (Hydrurga leptonyx), which use the area for resting and molting but do not establish permanent terrestrial colonies. Recent BAS monitoring (as of 2025) indicates severe declines in regional seal populations due to reduced extent, affecting resting and molting sites. No native terrestrial mammals occur on the island. The is sparse and confined to ice-free zones covering less than 5% of the island, consisting primarily of non-vascular cryptogams adapted to harsh conditions, with limited s. Lichens and mosses dominate fellfield and coastal terrace communities, with approximately 200 lichen species and 100 moss species documented across the in BAS vegetation surveys; notable examples include fruticose lichens on dry rock faces and cushion-forming mosses in guano-enriched soils. Two species, Antarctic hair grass () and Antarctic pearlwort (), occur in restricted coastal areas. , including freshwater and marine forms, thrive in streams and intertidal zones, contributing to microbial mats. Invertebrate life is limited to in soil pockets, moss turves, and ornithogenic soils influenced by activity. Springtails (Collembola, e.g., Cryptopygus antarcticus) and mites (Acari, including oribatid species) comprise the bulk of the terrestrial community, with 46 species recorded regionally; these detritivores graze on and fungi in moist microhabitats. guano fertilizes these areas, fostering robust microbial communities that sustain the invertebrate .

Environmental conditions

Coronation Island, part of the in the maritime Antarctic, features a polar maritime climate dominated by cold temperatures, frequent precipitation, and persistent winds driven by the . The mean annual air temperature is approximately -3.4°C, based on long-term records from nearby , which shares similar conditions. Summer months (December to March) see average temperatures around 0.8°C, with occasional highs reaching 2°C, while winter (June to August) averages -8.3°C, with lows dropping to -20°C or below during extreme events. Prevailing westerly winds average 7.3 m/s (about 14 knots), often strengthening to 15–20 knots due to unimpeded flow across the ocean, contributing to the harsh regime. Annual precipitation ranges from 500 to 700 mm, falling predominantly as snow or sleet and influenced by cyclonic storms originating in the , with events occurring on roughly 250 days per year. The surrounding seas experience seasonal pack ice formation, typically covering the area from late to , while winter months feature more persistent extent that restricts access and moderates local temperatures. Island soils exhibit at depths of about 1 meter in areas with deeper accumulations, accompanied by prominent cryoturbation processes such as formation due to freeze-thaw cycles. Key environmental challenges include the lingering effects of stratospheric , which has increased ultraviolet radiation levels over the Antarctic region since the 1980s, and ongoing climate change impacts documented by the (BAS). BAS monitoring reveals accelerated warming trends, with potential for glacier retreat similar to the 87% of glaciers that have receded since 1950, altering local and ice regimes. The island's varied , including elevations up to 600 m, creates microclimates where leeward slopes experience slightly warmer conditions due to föhn winds.

Conservation

Protected status

The north-central region of Coronation Island, known as Northern Coronation Island, was originally designated as Specially Protected Area (SPA) No. 18 in 1985 under Recommendation XIII-10 of the Antarctic Treaty to safeguard its ecological values. It was redesignated as No. 114 in 2002 through Decision 1 (2002). The area originally encompassed approximately 88.5 km² of coastal terrain and adjacent marine zones between Foul Point and Conception Point. The former ASPA included key features such as Wave Peak and Penguin Point, with marine boundaries extending up to 100 meters depth and about 11.5 km offshore to protect integrated ecosystems. It excluded higher elevations like Mount Nivea. Primary values focused on ornithological significance, including colonies of chinstrap penguins (approximately 5,000 breeding pairs as of 1997) and species, as well as pristine communities for scientific reference. ASPA 114 was de-designated in 2014 through Measure 16 (2014) at the 37th Antarctic Treaty Consultative Meeting in , as the site's environmental and scientific values were deemed adequately protected under the general provisions of the and , without needing special status. The had proposed the de-designation after assessments showed minimal human impact and no unique outstanding features requiring ongoing restriction. Northern Coronation Island now falls under standard conservation measures for the , emphasizing minimal disturbance and scientific research.

Management and access

Coronation Island, as part of the within the , is managed under the framework of the , particularly the 1991 Protocol on Environmental Protection to the (Madrid Protocol), which emphasizes the prevention of environmental harm and minimal human disturbance across . All activities on the island, including scientific research and , require permits issued by national authorities of parties to ensure compliance with environmental protection measures. The , through the Foreign, Commonwealth & Development Office and in coordination with the (BAS), oversees permitting and enforcement for activities in this region. Access to Coronation Island is strictly regulated to prevent unauthorized visits, with entry permitted only for approved scientific expeditions or organized tourism operations that align with conservation objectives. Tourism visits, primarily to sites like Shingle Cove, are governed by Antarctic Treaty Visitor Site Guidelines, which limit landings to a maximum of two ships per day, 100 visitors on shore at once, and require a minimum 5-meter distance from , along with designated buffer zones and closed areas around sensitive habitats such as burrows and patches. Scientific access necessitates permits demonstrating no adverse impact, often routed through flagged paths to avoid disturbance, and prohibits activities like collection of samples without prior approval. Monitoring of the island includes periodic inspections conducted by Antarctic Treaty parties, with the performing annual or biennial assessments via BAS to evaluate compliance with environmental protocols and assess . These inspections involve on-site visits to check for permit adherence, , and integrity, supplemented by boundary markers and signage at key access points like Shingle Cove to guide visitors and delineate restricted zones. Management efforts specifically address threats such as introduction, which is mitigated through strict protocols enforced by BAS, including inspections of personnel, equipment, and vessels before deployment. Tourism impacts are minimized via guidelines from the International Association of Antarctica Tour Operators (IAATO), which cap group sizes and prohibit off-trail movement to reduce trampling and wildlife disturbance. Pollution from shipping is countered by regulations under the International Maritime Organization's Polar Code, requiring plans and prohibiting discharges near the .

References

  1. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=108316
  2. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=123836
  3. https://www.oceanlight.com/log/coronation-island-south-orkney-islands.html
  4. https://www.bas.ac.uk/about/about-bas/history/british-research-stations-and-refuges/signy-h/
  5. https://www.britishantarcticterritory.org.uk/heritage/uk-antarctic-timeline/
  6. https://www.bas.ac.uk/data/our-data/publication/the-geology-of-the-south-orkney-islands-iii-coronation-island/
  7. https://www.theantarcticaspecialists.com/where-to-go/south-orkney-islands
  8. https://documents.ats.aq/recatt/att156_e.pdf
  9. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=111291
  10. https://royalsocietypublishing.org/doi/10.1098/rstb.1967.0008
  11. https://www.sciencedirect.com/science/article/pii/096706379500057D
  12. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=11192
  13. https://pubs.geoscienceworld.org/gsl/jgs/article/139/6/683/92609/Radiometric-evidence-for-the-age-of-the-subduction
  14. https://nora.nerc.ac.uk/id/eprint/509199/
  15. https://www.researchgate.net/publication/232003324_Mesozoic_tectonic_evolution_of_the_South_Orkney_Microcontinent_Scotia_arc_Antarctica
  16. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=16804
  17. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=107957
  18. https://www.icj-cij.org/node/104084
  19. https://www.spri.cam.ac.uk/picturelibrary/catalogue/snae1902-04/
  20. https://nora.nerc.ac.uk/521116/1/ANH-SNAE-textfigs.pdf
  21. https://www.euppublishing.com/doi/10.3366/anh.2018.0525
  22. https://www.ats.aq/e/antarctictreaty.html
  23. http://ats.aq/documents/recatt/att201_e.pdf
  24. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=128465
  25. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=110435
  26. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=129995
  27. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=108890
  28. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=128783
  29. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=108488
  30. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=127873
  31. https://nora.nerc.ac.uk/id/eprint/509199/1/The%2520geology%2520of%2520the%2520South%2520Orkney%2520Islands%2520-%2520III%2520-%2520Coronation%2520Island%2520-%2520BAS%2520Scientific%2520Report%252086.pdf
  32. https://data.aad.gov.au/aadc/gaz/display_name.cfm?gaz_id=129437
  33. https://nora.nerc.ac.uk/id/eprint/509199/1/The%20geology%20of%20the%20South%20Orkney%20Islands%20-%20III%20-%20Coronation%20Island%20-%20BAS%20Scientific%20Report%2086.pdf
  34. https://movementecologyjournal.biomedcentral.com/articles/10.1186/s40462-021-00261-x
  35. https://nora.nerc.ac.uk/id/eprint/539922/1/bulletin68_07.pdf
  36. https://bioone.org/journals/the-auk/volume-131/issue-4/AUK-14-31.1/First-global-census-of-the-Ad%25C3%25A9lie-Penguin/10.1642/AUK-14-31.1.pdf
  37. https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0164025
  38. https://www.bas.ac.uk/data/our-data/publication/population-size-and-trends-of-southern-giant-petrels-macronectes-giganteus/
  39. https://www.naturalworldsafaris.com/polar-regions/antarctica/safaris-and-planning/south-orkney-islands
  40. https://www.bas.ac.uk/media-post/seals-study-shows-melting-sea-ice-is-shaping-their-future/
  41. https://www.oneearth.org/ecoregions/south-orkney-islands-tundra/
  42. https://www.researchgate.net/publication/233470313_Oribatid_mites_Acari_Oribatida_of_the_Maritime_Antarctic_and_Antarctic_Peninsula
  43. https://rmets.onlinelibrary.wiley.com/doi/10.1002/joc.8302
  44. https://documents.ats.aq/ATCM15/ad/ATCM15_ad002_e.pdf
  45. https://www.sciencedirect.com/science/article/pii/S0960982222001361
  46. https://www.bas.ac.uk/polar-operations/sites-and-facilities/facility/signy/
  47. https://scar.org/~documents/policy/antarctic-treaty/atcm-xxxvi-and-cep-xvi-2013/atcm36-att125?layout=default
  48. https://www.bas.ac.uk/data/our-data/publication/climate-change-and-glacier-retreat-drive-shifts-in-an-antarctic/
  49. https://www.ats.aq/devAS/Meetings/Measure/144
  50. https://www.ats.aq/devAS/Meetings/Decision/202
  51. https://documents.ats.aq/ATCM25/wp/ATCM25_wp003_e.pdf
  52. https://www.ats.aq/devAS/Meetings/Measure/576
  53. https://documents.ats.aq/ATCM37/fr/ATCM37_fr001_e.pdf
  54. https://www.bas.ac.uk/about/antarctica/the-antarctic-treaty/the-antarctic-treaty-1959/
  55. https://www.ats.aq/devAS/Ats/Guideline/e08cc546-7213-4c85-8084-9e3734299374
  56. https://www.nsf.gov/geo/opp/env/antarctic-conservation-act-permits
  57. https://www.bas.ac.uk/wp-content/uploads/2021/08/BAS-Biosecurity-Regulations.pdf
  58. https://iaato.org/visiting-antarctica/visitor-guidelines-library
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