Jokulsarlon is a glacier lagoon in the south of Vatnajokull national park that is easily reached by the Ring Road.
Covered in thick glacial ice until the 1930’s when the glacier started retreating, the lagoon today measures 7 square miles (20 km2). More than 300 feet of ice still breaks away each year, reshaping the lagoon and filling it with icebergs - causing an alarmingly beautiful sight.
The water is freezing cold and contains a mixture of salt and freshwater giving it a blue-green color. There is plenty of fish and birdlife by the lagoon and the vast sand area of Breiðamerkursandur, and hundreds of seals stay there in winter.
Vatnajökull is the largest ice cap in Iceland and the third largest glacier in Europe, covering 8% of the island's landmass.
Facts about Vatnajökull
- Surface: 8,100 km2
- Average thickness: 400 - 600 m
- Maximum thickness: 1,000 m
- Height: 1,400 - 1,800 m
- Highest peak: 2,200 m (Hvannadalshnjúkur)
Information about Vatnajökull
Vatnajökull Glacier belongs to the greater Vatnajökull National Park, which encompasses the former national parks Skaftafell in the southwest and Jökulsárgljúfur in the north. Vatnajökull's highest summit is Hvannadalshnjúkur, which rests on top of the stratovolcano known as Öræfajökull.
Underneath the glacier rest some of the most active volcanoes in the country, the most notable being Grímsvötn, Öræfajökull and Bárðabunga. The volcanic activity of the glacial area occurs at intervals throughout the ages, and many geologists believe such a period is scheduled to happen in the immediate future. If their calculations are correct, it would mean a significant volcanic activity for Vatnajökull over the scope of the next half century.
The glacier boasts of over 30 outlet glaciers, which are channels of ice that flow out of ice caps but remain constrained on the sides to valleys. The major outlet glaciers of Vatnajökull include Dyngjujökull in the north, Breiðamerkurjökull and Skeiðarárjökull to the south; and Síðujökull, Skaftárjökull and Tungnaárjökull to the west.
Glaciers are in constant motion underneath their weight, as they form over centuries when the accession of snow exceeds its melting. Each year, due to the melting ice water, new ice caves form that disappear come spring.
Numerous rivers run out of Vatnajökull, making up some of the greatest glacial rivers in Iceland:
- Tungnaá (west)
- Köldukvísl (west)
- Þjórsá (west)
- Jökulsá á Fjöllum (north)
- Skjálfandafljót (north)
- Jökulsá á Brú (north east)
- Jökulsá í Fljótsdal (north east)
- Jökulsá í Lóni (south)
- Hornafjarðarfljót (south)
- Jökulsá á Breiðamerkursandi (south)
- Skeiðará (south)
- Núpsvötn (south)
- Hverfisfljót (south)
- Skaftá (south)
Vatnajökull National Park
The Vatnajökull National Park in its current state was established in June 2008. The park now covers an area of 14.141 km2, making it the second largest national park in Europe with a 14% coverage of the island of Iceland.
The combined forces of volcanic and geothermal activity, glacial rivers and ice make up the different features of incredible landscapes that together give Vantajökull National Park its unique qualities.
Rivers divide the highland plateau to the north of the park; an area that sees massive glacial flows in the summertime. The volcanic table mountain Herðubreið towers over this particular region, along with volcanoes Askja, Snæfell and Kverkfjöll.
The canyon Jökulsárgljúfur was carved out by glacial floods centuries ago. At the upper end of the canyon, you'll find Dettifoss, the most powerful waterfall in Europe. Further north, the horseshoe-shaped canyon Ásbyrgi is believed to have formed when Óðinn's horse Sleipnir stepped his foot down from the heavens.
East around Snæfell, wetlands and ranges are home to roaming herds of wild reindeer and abundant birdlife. Steep mountain ridges make up the south side of Vatnajökull, where outlet glaciers crawl in between the ridges onto the lowlands. The sandy plains of Skeiðarársandur also lie to the south as they reach out to sea. The glacial river Skeiðará runs through this vast desert.
One of Iceland's most visited landmarks is the Jökulsárlón glacier lagoon, which sits at the head of outlet glacier Breiðamerkurjökull. There, large icebergs that have broken off the glacier gather to float in the lake before ending up in the Atlantic Ocean, or on the nearby Diamond Beach.
The Future of Vatnajökull
The volume of Vatnajökull reached its peak around 1930 but has since been in a steady process of decline. Because of rising levels of global temperature, approximately over the last 15 years, Vatnajökull has on average lost about a metre of its thickness annually.
If temperature levels continue to rise, the glacier could be all but gone nearing the end of the next century, leaving only small ice caps on top of the highest mountain summits.
Vatnajökull and Jökulsárlón in Popular Culture
- HBO's Game of Thrones (season 2, 2012)
- Batman Begins (2005)
- James Bond: Die Another Day (2002)
- James Bond: A View to a Kill (1985)
Breiðamerkurjökull is the glacial tongue that extends from southern Vatnajökull and into the glacier lagoon Jökulsárlón.
Breiðamerkurjökull is constantly retreating, breaking and melting, causing the Jökulsárlón glacier lagoon to increase in size. This glacier tongue provides the lagoon with all of its enormous icebergs, which perpetually break from off its tip and tumble into the abyssal waters where they float for about 5 years until they are small enough to make their way towards sea and join the countless smaller ice chunks that adorn the nearby Diamond Beach.
Breiðamerkurjökull is beset with enormous cracks and crevices, and since it's virtually impossible to tell exactly when the next big block of ice will break from it, people should admire this enormous glacier tongue from a great distance.
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