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Southampton Island

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Southampton Island is a massive landmass located in the Arctic Archipelago. It sits at the entrance to Hudson Bay near the Foxe Basin. This island is part of the Kivalliq Region within the territory of Nunavut, Canada. It is a very large island by global standards. Specifically, it is the 34th largest island in the world. Within Canada, it holds the rank of the ninth largest island. Its physical shape is vaguely similar to the island of Newfoundland.

Glacial rebound on Southhampton Island, Nunavut
Glacial rebound on Southhampton Island, Nunavut

The island is surrounded by several distinct waterways and landforms. The Frozen Strait separates the island from the Melville Peninsula. To the west lies the Roes Welcome Sound. The southwest is bordered by the Bay of Gods Mercy. In the south, you will find the Fisher Strait. The southeast is marked by the Evans Strait. To the east, the island meets the Foxe Channel. Within the island itself, Hansine Lake sits in the far north. The Bell Peninsula is located in the southeastern portion. The highest point is Mathiassen Mountain, which belongs to the Porsild Mountains.

The climate on Southampton Island is classified as severe subarctic. This is known as a Köppen Dfc climate. It transitions into a tundra climate, which is labeled ET. Because the island is entirely above the tree line, no trees grow there. The weather is heavily influenced by the frozen nature of Hudson Bay. This creates a severe seasonal lag in temperatures. Even when there is much sunshine, warmth does not arrive until June. In the winter, temperatures in Coral Harbour stay below freezing for January, February, and March. As September approaches, temperatures drop very quickly because of low solar strength.

Glacial rebound on Southhampton Island, Nunavut
Glacial rebound on Southhampton Island, Nunavut

Human history on the island includes both ancient and modern eras. The island was once home to the Sadlermiut, also known as the Sallirmiut. They were a pre-Inuit culture known as the Tuniit. This group became extinct in 1902 or 1903. Infectious disease killed the entire population in only a few weeks. The first recorded visit by Europeans occurred in 1613 by Thomas Button. In the early 20th century, the island was repopulated by the Aivilingmiut. These people came from Naujaat and Chesterfield Inlet. They were influenced to move by whaler Captain George Comer. Baffin Islanders arrived about 25 years later. One famous individual from this resettled group was John Ell.

Today, the island has only one permanent settlement. This community is called Coral Harbour, or Salliq in Inuktitut. According to the 2021 Canadian census, the population is 1,035 people. Southampton Island is unique in how it manages time. It is the only area in Nunavut that does not use daylight saving time. The island also holds significant archaeological value. The Native Point site at the mouth of Native Bay is the largest known Sadlermiut site.

Glacial rebound on Southhampton Island, Nunavut
Glacial rebound on Southhampton Island, Nunavut

The island serves as a vital habitat for various animal species. It contains the Qaqsauqtuuq and Ikkattuaq Migratory Bird Sanctuaries. These areas are essential breeding sites for the lesser snow goose. The island also features two Important Bird Areas (IBAs). These are the Boas River wetlands and the East Bay/Native Bay region. These sites host massive summer colonies of snow geese. The Boas River site alone hosts over 500,000 nesting individuals. Together, these areas hold more than 10% of the world's snow goose population. Other birds include the brent goose and many polar species. Additionally, the island is one of two main summering grounds for bowhead whales in Hudson Bay.

Geology and environmental changes also make the island a place of study. The island possesses geological resources that interest both scientists and industries. However, the Nunavut government notes that full knowledge of the island is still lacking. One interesting process occurring here is glacial rebound. This is a phenomenon where land rises after the weight of heavy ice is removed.

Glacial rebound on Southhampton Island, Nunavut
Glacial rebound on Southhampton Island, Nunavut

This process can be seen in the snow-enhanced paleo-strand lines from the last 10,000 years. These lines help researchers understand how the landscape has shifted over millennia.

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