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Record #96593:
- #96593
Main publication details
MARC recordTwo-dimensional thermo-mechanical modelling of flow and depth-age profiles near the ice divide in central Greenland / Dorthe Dahl-Jensen.
| Title: | Two-dimensional thermo-mechanical modelling of flow and depth-age profiles near the ice divide in central Greenland / Dorthe Dahl-Jensen. |
| Author(s): | Dahl-Jensen, Dorthe. |
| Date: | 1989. |
| Publisher: | Cambridge: International Glaciological Society |
| In: | Annals of Glaciology. (1989.), Vol. 12 (1989) |
| Abstract: | Results show that surface strain-rates are increased by 50% of values found 15 km down-stream and that basal temperatures rise by 3°C. Estimates of depth-age distribution in vicinity of Crête show that isochrones rise at dome. Model calculations predict 1600 m of Holocene ice, 1000 m of Wisconsin ice and 400 m of ice older than 115 ka. 15 km down-stream from dome, thickness of ice older than 115 ka will be reduced by 15%. These calculations assume that ice thickness at dome is time-invariant. Existence of old ice depends on basal temperature. Estimates of basal temperature depend strongly on past accumulation rates and on geothermal heat flux, but ice has probably been below pressure-melting point throughout last glacial period. |
| Notes: | Annals of Glaciology. Vol. 12 :31-36 (1989). |
| Keywords: | 551.324.5 -- Land ice, flow. 551.32 -- Glaciology. 551.324 -- Land ice. 551.324.412 -- Land ice, temperature. E5 -- Glaciology: land ice. (*38) -- Greenland. |
| SPRI record no.: | 96593 |
LDR 01621naa#a2200000#a#4500 001 SPRI-96593 005 20230401173041.0 007 ta 008 230401s1989####enka##|##|###|0||#0|eng#d 035 ## ‡aSPRI-96593 040 ## ‡aUkCU-P‡beng‡eaacr 100 1# ‡aDahl-Jensen, Dorthe. 245 10 ‡aTwo-dimensional thermo-mechanical modelling of flow and depth-age profiles near the ice divide in central Greenland /‡cDorthe Dahl-Jensen. 260 ## ‡aCambridge :‡bInternational Glaciological Society,‡c1989. 300 ## ‡ap. 31-36 :‡bdiags. 500 ## ‡aAnnals of Glaciology. Vol. 12 :31-36 (1989). 520 3# ‡aResults show that surface strain-rates are increased by 50% of values found 15 km down-stream and that basal temperatures rise by 3°C. Estimates of depth-age distribution in vicinity of Crête show that isochrones rise at dome. Model calculations predict 1600 m of Holocene ice, 1000 m of Wisconsin ice and 400 m of ice older than 115 ka. 15 km down-stream from dome, thickness of ice older than 115 ka will be reduced by 15%. These calculations assume that ice thickness at dome is time-invariant. Existence of old ice depends on basal temperature. Estimates of basal temperature depend strongly on past accumulation rates and on geothermal heat flux, but ice has probably been below pressure-melting point throughout last glacial period. 650 07 ‡a551.324.5 -- Land ice, flow.‡2udc 650 07 ‡a551.32 -- Glaciology.‡2udc 650 07 ‡a551.324 -- Land ice.‡2udc 650 07 ‡a551.324.412 -- Land ice, temperature.‡2udc 650 07 ‡aE5 -- Glaciology: land ice.‡2local 651 #7 ‡a(*38) -- Greenland.‡2udc 773 0# ‡7nnas ‡tAnnals of Glaciology. ‡gVol. 12 (1989) ‡wSPRI-60773 917 ## ‡aUnenhanced record from Muscat, imported 2019 948 3# ‡a20230401