Editing Langjökull (section)

==Water flow and development of the glacier==
Despite the size of Langjökull, not many rivers directly originate there. However research has shown that large quantities of water flow in sub-surface streams to lake [[Þingvallavatn]] (some {{cvt|50|km}} to the south and easily accessible to tourists) and reappear in springs in and around the lake, while the same happens on the west side, giving rise to various tributaries of the [[Hvítá, Árnessýsla|Hvítá River]] as well as some rivers flowing north towards [[Húnaflói]]. Thus many of the hot springs in the [[Borgarfjörður]] region (near the estuary of the Hvítá on the west coast), such as [[Deildartunguhver]], receive ground water from Langjökull.

The same is true for the lake [[Hvítárvatn]] to the east: two-thirds of its waters appear to come from Langjökull by underwater channels.<ref name="sciencedirect.com"/>

Langjökull is shrinking quite fast, and some researchers believe that it will disappear in about 150 years if climate change continues at its recent pace.<ref>{{cite web|last1 =Björnsson|first1 =H.|last2 =Aðalgeirsdóttir|first2 =G.|last3 =Guðmundsson|first3 =S.|last4 =Jóhannesson|first4 =T.|last5 =Pálsson|first5 =F.|last6 =Sigurðsson|first6 =O.|year =2006|title =Climate change response of Vatnajökull, Hofsjökull and Langjökull ice caps, Iceland|publisher=European Conference on Impacts of Climate Change on Renewable Energy Sources, Reykjavik, Iceland.|access-date=2024-05-01|url =https://www.researchgate.net/profile/Sverrir-Gudmundsson/publication/242197625_Climate_change_response_of_Vatnajokull_Hofsjokull_and_Langjokullice_caps_Iceland/links/0deec52a5bbc8bd043000000/Climate-change-response-of-Vatnajoekull-Hofsjoekull-and-Langjoekullice-caps-Iceland.pdf}}</ref>