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Record #196302:
Physical properties and formation of flutes at a polythermal valley glacier: Midre Lovénbreen, Svalbard / Sam Roberson, and 3 others.
Title: | Physical properties and formation of flutes at a polythermal valley glacier: Midre Lovénbreen, Svalbard / Sam Roberson, and 3 others. |
Author(s): | Roberson, Sam. |
Date: | 2011. |
In: | Geografiska Annaler. Series A. Physical Geography. (2011.), Vol. 93(2) (2011) |
Abstract: | Investigates physical properties of flutes widespread across glacier forefield, focusing on setting, morphology, sedimentology, and isotopic composition. Compares with properties of adjacent debris-rich basal ice, subglacial till and proglacial till. Proposes flute formation by squeezing of till into basal cavities associated with boulders beneath warm-based ice in glacier interior. Localized freeze-on of flute sediments occurs within cavities due to either (i) "heat pump" effect operating across boulder, leading to development of cold patch within cavity, and/or (ii) cavity length fluctuations caused by slip-stick glacier motion. Describes how ice flow transports frozen flute sediment away from boulder, allowing cavity to remain open and flute to propagate downflow. |
Notes: | Geografiska Annaler. Series A. Physical Geography. Vol. 93(2) :71-88 (2011). |
Keywords: | 551.32 -- Glaciology. 551.4 -- Geomorphology. 551.324.22 -- Glaciers: Midre Lovénbreen. 551.34 -- Geocryology. Frozen ground. 551.343 -- Periglacial processes. Thermokarst. 551.333.2 -- Glacial substrate, deformation structures in. 551.332.21 -- Till or boulder clay. Tillite. Glacial diamictites. 551.324.51 -- Land ice, theory of flow. 551.324.5 -- Land ice, flow. 536 -- Heat. 54.027 -- Isotope analysis. 551.332.51 -- Ice-marginal landforms. 551.332.55 -- Ice-contact features. 539.6 -- Ice, adhesion and friction. Regelation. E5 -- Glaciology: land ice. (*32) -- Svalbard. |
SPRI record no.: | 196302 |
LDR 02391naa#a2200000#a#4500 001 SPRI-196302 005 20240328114819.0 007 ta 008 240328s2011####xx#ab#|##|###|0||#0|eng#d 035 ## ‡aSPRI-196302 040 ## ‡aUkCU-P‡beng‡eaacr 100 1# ‡aRoberson, Sam. 245 10 ‡aPhysical properties and formation of flutes at a polythermal valley glacier :‡bMidre Lovénbreen, Svalbard /‡cSam Roberson, and 3 others. 260 ## ‡a[S.l.] :‡b[s.n.],‡c2011. 300 ## ‡ap. 71-88 :‡bill., diags., tables, maps. 500 ## ‡aGeografiska Annaler. Series A. Physical Geography. Vol. 93(2) :71-88 (2011). 520 3# ‡aInvestigates physical properties of flutes widespread across glacier forefield, focusing on setting, morphology, sedimentology, and isotopic composition. Compares with properties of adjacent debris-rich basal ice, subglacial till and proglacial till. Proposes flute formation by squeezing of till into basal cavities associated with boulders beneath warm-based ice in glacier interior. Localized freeze-on of flute sediments occurs within cavities due to either (i) "heat pump" effect operating across boulder, leading to development of cold patch within cavity, and/or (ii) cavity length fluctuations caused by slip-stick glacier motion. Describes how ice flow transports frozen flute sediment away from boulder, allowing cavity to remain open and flute to propagate downflow. 530 ## ‡aAlso issued online ‡uurn:doi:10.1111/j.1468-0459.2011.00420.x‡uhttps://dx.doi.org/10.1111/j.1468-0459.2011.00420.x 650 07 ‡a551.32 -- Glaciology.‡2udc 650 07 ‡a551.4 -- Geomorphology.‡2udc 650 07 ‡a551.324.22 -- Glaciers: Midre Lovénbreen.‡2udc 650 07 ‡a551.34 -- Geocryology. Frozen ground.‡2udc 650 07 ‡a551.343 -- Periglacial processes. Thermokarst.‡2udc 650 07 ‡a551.333.2 -- Glacial substrate, deformation structures in.‡2udc 650 07 ‡a551.332.21 -- Till or boulder clay. Tillite. Glacial diamictites.‡2udc 650 07 ‡a551.324.51 -- Land ice, theory of flow.‡2udc 650 07 ‡a551.324.5 -- Land ice, flow.‡2udc 650 07 ‡a536 -- Heat.‡2udc 650 07 ‡a54.027 -- Isotope analysis.‡2udc 650 07 ‡a551.332.51 -- Ice-marginal landforms.‡2udc 650 07 ‡a551.332.55 -- Ice-contact features.‡2udc 650 07 ‡a539.6 -- Ice, adhesion and friction. Regelation.‡2udc 650 07 ‡aE5 -- Glaciology: land ice.‡2local 651 #7 ‡a(*32) -- Svalbard.‡2udc 773 0# ‡7nnas ‡tGeografiska Annaler. Series A. Physical Geography. ‡gVol. 93(2) (2011) ‡wSPRI-40621 917 ## ‡aUnenhanced record from Muscat, imported 2019 948 3# ‡a20240328