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Jökulsárlón

Glacial lake in Iceland

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  • 5 chapters

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The lake can be seen from Route 1 between Höfn and Skaftafell. It appears as "a ghostly procession of luminous blue icebergs".

Jökulsárlón has been a setting for four Hollywood movies: A View to a Kill, Die Another Day, Lara Croft: Tomb Raider, and Batman Begins, as well as the reality TV series The Amazing Race. In 1991, Iceland issued a postage stamp, with a face value of 26 kronur, depicting Jökulsárlón.

The tongue of the Breiðamerkurjökull glacier is a major attraction for tourists.

Formation

Lagoon

Jökulsárlón is the largest and most active glacial lake in Iceland. It provides outstanding views of the ice cap Vatnajökull, a vast dome of ice that rises to a height of 900 m (3,000 ft) and shows how the outlet glacier Breiðamerkurjökull calves into the lagoon.

The lagoon started to form in 1930's after the glacier Breiðamerkurjökull started to recede in the late 19th century, and it is getting bigger because the glacier is receding about 200m every year. Icebergs gather at the mouth of the lake's shallow exit, melt down into smaller ice blocks, and roll out into the sea. Ice water and soil make a unique ecological phenomenon. Jökulsárlón Lake, the "glacier lake", was reported to have doubled in size in the 15-year period before 2007. The huge blocks of ice that calve from the edge of Vatnajökull are about 30 m (98 ft) high, which fills the lagoon stocked with icebergs. Some icebergs appear naturally sculpted on account of volcanic ash from ancient eruptions that partly covers them.

Icebergs

The icebergs that calve from the glacier edge move towards the river mouth and get entrenched at the bottom. The movement of the icebergs fluctuates with the tide currents, as well as being affected by wind. However, they start floating as icebergs when their size is small enough to drift to the sea. These icebergs are seen in two shades: milky white and bright blue, which depends on the air trapped within the ice and is an interplay of light and ice crystals.

Glacier - Breiðamerkurjökull

The outlet glacier that feeds the lagoon is called Breiðamerkurjökull.

Out-wash plains - Breiðamerkursandur

The glacier is responsible for the formation of a large outwash plain called Breiðamerkursandur. It has a breadth of around 25 km and serves as bird habitat in the summer month. This outwash plain is constantly changing. The shoreline of the glacial lagoon used to be advancing, but is now retreating as there is a decrease in glacial rivers depositing material. However, as the glaciers melt, the land rises around 2–4 cm each year somewhat balancing out the retreating shoreline.

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