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(yŭ′kəl-hloup′, -hlōp′, -hlo͞op′, yō′-; yœ′kül-hlœp′)
n. pl. jö·kul·hlaups
The sudden, catastrophic release of meltwater from beneath or behind a glacier.

[Icelandic : jökull, glacier (from Old Norse jǫkull, icicle, ice; akin to Old English gicel, icicle) + hlaup, run, sudden rise of a river, flood (from Old Norse, leap, from hlaupa, to leap; akin to Old English hlēapan).]
References in periodicals archive ?
However the impact is different in every region of the country - the northern areas face problems such as glacial lake outburst floods while the coastal belt faces the loss of millions of hectares of land due to sea intrusion.
A glacial lake outburst flood, or GLOF, occurs when a dam, either natural or manmade, containing a glacial lake fails as a result of erosion, a massive snow avalanche or other causes.
The natural dams holding all of this water in are very unstable, and when they break, the so-called glacial lake outburst floods (GLOFs) that result can be devastating, involving the sudden release of hundreds of millions of cubic metres of water.
Melt rate will enhance due to high temperatures and expected localized heavy downpour which may trigger glacial lake outburst flood (GLOF) events in Gilgit Baltistan and Chitral areas,' it said.
The prevailing high temperatures in northern areas with combination of rainfall may trigger glacial lake outburst flood (GLOF)/flash flood events in Gilgit-Baltistan and Chitral resulting in high flows in the local rivers and streams of northern areas during next couple of days.
By ISLAMABAD, August 03, 2011 (Balochistan Times): National Disaster Management Authority (NDMA) is busy in providing to relief to Glacial Lake Outburst Flood (GLOF) affectees in village Talis, district Ghanche of Gilgit-Baltistan, said a representative of NDMA on Tuesday.
Rising temperatures, he said, would particularly alter bio-physical relationships for crops, livestock, fisheries and forests such as shortening of the growing periods, changing the species patterns, increasing thermal and moisture stresses, increased water requirements, increased glacial lake outburst floods, altering soil characteristics, and increasing the risk of pests and diseases.
CHITRAL -- Speakers at a workshop have said that several villages in the district face potential danger of glacial lake outburst floods.
Some of the other adverse effects of climate change in Pakistan includes extreme temperatures, seasonal droughts, heavy rains, monsoonal storms, cyclones, devastating floods, unusual fogs, melting of glaciers, glacial lake outburst floods (GLOFs), landslides and avalanches in the mountain areas and threatening inflows into Indus River System (IRS).
disasters range wide over natural calamities like extreme rains, all types of floods, glacial lake outburst floods (GLOFs), landslides, droughts, cyclones, heat waves, mini cyclones, avalanches and others said the report.
A mini-cyclone in Peshawar killed 44 people; heat waves in Karachi killed more than 1,500 people, cloudbursts and glacial lake outburst floods (GLOFs) in various areas of Gilgit-Baltistan affected 35,717 people," said Hammad Naqi Khan, Director General WWF-Pakistan, in a statement.
Thirdpole said three were reported dead in Chitral as a result of flash floods and glacial lake outburst floods.