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Record #164681:

Growth and drainage of supraglacial lakes on the debris-mantled Ngozumpa Glacier, Khumbu Himal, Nepal / D.I. Benn, S. Wiseman, K.A. Hands.

Title: Growth and drainage of supraglacial lakes on the debris-mantled Ngozumpa Glacier, Khumbu Himal, Nepal / D.I. Benn, S. Wiseman, K.A. Hands.
Author(s): Benn, D. I.
Wiseman, S.
Hands, K. A.
Date: 2001.
In: Journal of Glaciology. (2001.), Vol. 47(159) (2001)
Abstract: Seeks to assess future response of Himalayan debris-mantled glaciers to climate change and the associated glacier lake outburst flood (GLOF) hazard potential. Constructs a qualitative model of supraglacial lake evolution based on field observations of a range of lake types and their changes over time. Focuses on Ngozumpa Glacier, a 25 km long valley glacier that has undergone significant recent downwasting. Glacier has numerous supraglacial ponds and lakes on its debris-mantled ablation area, and may lie close to a threshold for rapid lake coalescence and expansion. Discusses in detail two "perched" lakes (with no connection to englacial drainage system) and a moraine-dammed lake drained through a subaerial incision. Describes observations of subaerial melting, thermo-erosional notching at the water line and calving. Identifies a number of controls on lake evolution, e.g., the opening and closing of connections from perched lakes to the englacial drainage system.
Notes:

Journal of Glaciology. Vol. 47(159) :626-638 (2001).

Keywords: 551.32 -- Glaciology.
551.324 -- Land ice.
551.324.86 -- Glacier streams.
556 -- Hydrology.
551.33 -- Glacial geology.
551.332.56 -- Lakes, ice-dammed. Glacial lakes. Disruption of water drainage.
.000(410) -- British author.
E11 -- Glaciology: glaciohydrology.
(541.35) -- Nepal.
SPRI record no.: 164681

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520 3# ‡aSeeks to assess future response of Himalayan debris-mantled glaciers to climate change and the associated glacier lake outburst flood (GLOF) hazard potential. Constructs a qualitative model of supraglacial lake evolution based on field observations of a range of lake types and their changes over time. Focuses on Ngozumpa Glacier, a 25 km long valley glacier that has undergone significant recent downwasting. Glacier has numerous supraglacial ponds and lakes on its debris-mantled ablation area, and may lie close to a threshold for rapid lake coalescence and expansion. Discusses in detail two "perched" lakes (with no connection to englacial drainage system) and a moraine-dammed lake drained through a subaerial incision. Describes observations of subaerial melting, thermo-erosional notching at the water line and calving. Identifies a number of controls on lake evolution, e.g., the opening and closing of connections from perched lakes to the englacial drainage system.
650 07 ‡a551.32 -- Glaciology.‡2udc
650 07 ‡a551.324 -- Land ice.‡2udc
650 07 ‡a551.324.86 -- Glacier streams.‡2udc
650 07 ‡a556 -- Hydrology.‡2udc
650 07 ‡a551.33 -- Glacial geology.‡2udc
650 07 ‡a551.332.56 -- Lakes, ice-dammed. Glacial lakes. Disruption of water drainage.‡2udc
650 07 ‡a.000(410) -- British author.‡2udc
650 07 ‡aE11 -- Glaciology: glaciohydrology.‡2local
651 #7 ‡a(541.35) -- Nepal.‡2udc
700 1# ‡aWiseman, S.
700 1# ‡aHands, K. A.
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