Western East Antarctica (2637 – 910 BCE): …

Years: 2637BCE - 910BCE

Western East Antarctica (2637 – 910 BCE): Icebound Shores and Subantarctic Refuges

Geographic and Environmental Context

Western East Antarctica stretches from the Transantarctic Mountains eastward along the Indian Ocean and Atlantic sectors of the Southern Ocean. While the mainland is buried under the East Antarctic Ice Sheet, its northern maritime periphery includes a chain of subantarctic islandsSouth Georgia, the South Sandwich Islands, the South Orkney Islands (including Coronation Island), Bouvet Island, Prince Edward and Marion Islands, and the western Kerguelen Islands. These islands sit in the Furious Fifties and Screaming Sixties wind belts, where powerful westerlies drive cold, nutrient-rich currents.

Climate and Environmental Conditions

  • Mainland: Hyper-polar desert, dominated by ice domes, outlet glaciers, and coastal ice cliffs.

  • Subantarctic islands: Cold-oceanic climate—wet, windy, and cool year-round, but far milder than the Antarctic continent, with ice-free ground in summer.

  • Marine influence: Upwelling around these islands sustains some of the richest marine ecosystems on Earth.

Biological Productivity

The contrast between the icebound mainland and the subantarctic islands is stark:

  • South Georgia and Marion Island: Vast colonies of king penguins, gentoo penguins, albatrosses, and fur seals.

  • South Sandwich Islands: Volcanic activity creates ice-free slopes that host seabird rookeries.

  • Bouvet Island: Almost entirely glaciated, but fringed with beaches used by seals and penguins.

  • Western Kerguelen Islands: Tussock grasslands shelter burrowing seabirds and provide grazing for introduced species (in later history).

  • Marine ecosystems teem with krill, squid, and fish, forming the base of food webs feeding whales, seals, and seabirds.

Human Presence

In 2637 – 910 BCE, none of these islands, nor the Antarctic mainland, were known to humans. The combination of vast ocean distances, relentless storms, and lack of advanced seafaring technology kept them entirely outside the human geographic horizon. These ecosystems evolved free from terrestrial predators and human disturbance.

Environmental Dynamics

  • Volcanism: Some islands, like those in the South Sandwich chain, were volcanically active, periodically reshaping coastlines and creating new nesting habitat.

  • Glacial influence: Mainland glaciers calved into the sea, producing icebergs that drifted into subantarctic waters.

  • Nutrient cycling: Marine upwelling and seabird guano deposits enriched soils, creating localized pockets of lush vegetation.

Symbolic and Conceptual Role

For ancient societies, the far southern ocean—if imagined at all—was a zone of mythic or unknown waters. The subantarctic islands and Antarctic coast were far beyond the limits of known navigation and absent from oral geographies.

Transition to the Early First Millennium BCE

By 910 BCE, Western East Antarctica and its subantarctic arc remained a realm of storms, ice, and prolific wildlife. Its rich ecosystems would remain untouched until the modern era of long-distance navigation and polar exploration.

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