Table 1 Sampling sites.

From: Black carbon footprint of human presence in Antarctica

Site

Latitude (°)

Longitude (°)

Season

Observations

South Shetland Islands

King George Island

Arctowski Ice Field

−62.1203

−58.6453

19/20

King George Island (95 km long and 25 km wide, with an area of 1150 km2) is the largest of the South Shetland Islands, lying 120 km off the coast of Antarctica in the Southern Ocean. Research stations operated by Argentina, Brazil, Chile, China, South Korea, Peru, Poland, Russia, and Uruguay are located on the island, where Chile operates one of the busiest Antarctic airfields. Of the visitors who travelled with IAATO members to the region in the season 2019/20, about 6% took at least one flight in or out of King George Island, combined with a Peninsula cruise. We sampled at 8 sites on the island including at two of the three major bays (Maxwell Bay and Admiralty Bay Arctowski) as well as on Collins Glacier, which covers about 75% of the island.

Collins Glacier 1

−62.1673

−58.8547

17/18

Collins Glacier (Dome)

−62.1686

−58.8753

19/20

Collins Glacier 2

−62.1698

−58.8586

16/17

Collins Glacier (Artigas)

−62.1833

−58.8844

19/20

Maxwell Bay (LARC)

−62.2028

−58.9608

16/17

Maxwell Bay (Ardley)

−62.2167

−58.9333

16/17

Maxwell Bay (South)

−62.2238

−58.9635

17/18

Robert Island

Coppermine Peninsula

−62.3786

−59.7119

16/17

Robert Island (132 km2) is situated between Nelson Island and Greenwich Island. We sampled in the Coppermine Peninsula, located on the southwest coast of the island.

Greenwich Island

Prat Station

−62.4798

−59.6434

18/19

19/20

Greenwich Island (142.7 km2) lies between Robert Island and Livingston Island. The Chilean Prat base and an Ecuadorian Maldonado base are situated on the northeast and north coast of the island, respectively. We sampled about 1 km west of the Prat station.

Half Moon

Half Moon Bay

−62.5956

−59.9122

18/19

Half Moon Island (1.7 km2) lies 1.35 km north of Livingston Island in the South Shetland Islands. An Argentinian naval station is operational occasionally during the summer, but it is closed during the winter.

Livingston Island

Walker Bay 1

−62.6364

−60.6008

19/20

Livingston Island (798 km2; 73 km long and 36 km wide) has research stations on the northwest coast of Hurd Peninsula, operated in summer by Spain and Bulgaria. We sampled at 2 sites at Walker Bay near Hannah Point on the south coast of the island. Most of the extensive Byers Peninsula (about 60 km2), forming the west extremity of Livingston Island, is ice-free.

Walker Bay 2

−62.6362

−60.6010

19/20

Deception Island

Mount Pond

−62.9656

−60.5522

19/20

Deception Island is the caldera of an active volcano. The island has a scientific outpost with Argentine and Spanish research stations, and has become a popular tourist destination. We sampled at Mount Pond near the Whaler Bay on the southwest coast of the island and at a site nearby the Spanish Gabriel de Castilla Station.

G. de Castilla Station

−62.9768

−60.6691

18/19

Palmer Archipelago

Trinity Island

Mikkelsen Harbor 1

−63.8967

−60.8025

16/17

18/19

Trinity or Trinidad Island (240 km2; 24 km long and 10 km wide) is in the northern part of the Palmer Archipelago. We sampled at two sites close to the southernmost point of the island (the Skottsberg Point), which marks the west side of Mikkelsen Harbor.

Mikkelsen Harbor 2

−63.9133

−60.8150

19/20

Doumer Island

Yelcho Station 1

−64.8761

−63.5783

19/20

Doumer Island (30 km2) lies between the south portions of Wiencke Island and Anvers Island (where the U.S. Palmer Station lies). We sampled at three sites close to the southernmost point of the island, nearby the Chilean Yelcho station and about 25 km east of Palmer Station.

Yelcho Station 2

−64.8775

−63.5831

19/20

Yelcho Station 3

−64.8779

−63.5824

19/20

Antarctic Peninsula

Trinity Peninsula

O’Higgins Station

−63.3225

−57.8970

18/19

Trinity Peninsula is the northernmost part of the Antarctic Peninsula. We sampled nearby the Chilean O’Higgins Station, located about 30 km southwest of Prime Head, the northernmost point of the Antarctic Peninsula. Hope Bay (Bahía Esperanza; 5 km long and 3 km wide) indents the northern tip of the Antarctic Peninsula. It is the site of the Argentinian settlement Esperanza Base. We sampled about 2 km southeast of Esperanza Base.

Hope Bay

−63.4078

−56.9911

19/20

Charlotte Bay

Portal Point

−64.5001

−61.7661

18/19

Charlotte Bay is a bay on the west coast of the Antarctic Peninsula indenting the west coast of Graham Land in a southeast direction. We sampled nearby Portal Point, where a British hut lies.

Cuverville Island

Northern shore

−64.6803

−62.6194

16/17

Cuverville (3.6 km2) is a rocky island lying in Errera Channel between Arctowski Peninsula and the northern part of Rongé Island. We sampled on the north coast of the island.

Petermann Island

Groussac Refuge

−65.1758

−64.1361

16/17

18/19

Petermann (2 km2) is a small, low and rounded island lying off the northwest coast of Kiev Peninsula, a short distance south of Booth Island and the Lemaire Channel. It is a popular tourist destination. We sampled nearby the Argentinian Groussac refuge.

Detaille Island

Station W

−66.8687

−66.7833

16/17

Detaille is a small island off the northern end of the Arrowsmith Peninsula. We sampled nearby the unoccupied “Base W” of the British Antarctic Survey.

Ellsworth Mountains

Union Glacier

Union Glacier 1

−79.7669

−82.9144

16/17

Union Glacier is a large glacier that receives the flow of several tributaries and drains through the middle of the Heritage Range, Ellsworth Mountains. The glacier is the site of a blue-ice runway and two seasonally occupied camps (a Chilean camp and another operated by a private company that provides private expedition support and tours). In addition to the blue-ice runway, both camps operate ski-equipped airplanes. We sampled at two sites northwest of the Chilean camp, about 6 km east of the Blue-Ice Runway but less than 1 km away from designated landing sites for ski-equipped airplanes.

Union Glacier 2

−79.7625

−82.9603

18/19