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Record #96609:
- #96609
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MARC recordEquilibrium state of Jakobshavns Isbrae, West Greenland / M.S. Pelto, Terence J. Hughes, H.H. Brecher.
| Title: | Equilibrium state of Jakobshavns Isbrae, West Greenland / M.S. Pelto, Terence J. Hughes, H.H. Brecher. |
| Author(s): | Pelto, M. S. Hughes, Terence J. Brecher, H. H. |
| Date: | 1989. |
| Publisher: | Cambridge: International Glaciological Society |
| In: | Annals of Glaciology. (1989.), Vol. 12 (1989) |
| Abstract: | Fastest persistent velocity of any known glacier. Measurement of surface velocities at calving front in July 1964, 1976, 1978, 1985, and 1986 yielded mean velocity of 20 m d⁻¹, with year-to-year variation of <1 m d⁻¹. Velocity measurements 10 km behind calving front indicated mean annual velocities of 17.1 m d⁻¹ compared with mid-summer velocities of 17.6 m d⁻¹: maximum possible decline in winter is then 7%. Calculation of volume flux into fjord is 3.72x10¹⁰ m³ a⁻¹±10%. Surface balance is 3.37x10¹⁰ m³\a d⁻¹±12%. Agreement between these balance calculations, long-term stability in glacier velocity, and reasonably stable glacier front indicate that glacier is in state of near equilibrium, with possible small negative balance. |
| Notes: | Annals of Glaciology. Vol. 12 :127-131 (1989). |
| Keywords: | 551.324.54 -- Land ice, flow of particular glaciers: Jakobshavns Isbrae. 551.32 -- Glaciology. 551.324 -- Land ice. 551.324.43 -- Land ice, regime and mass balance: Jakobshavns Isbrae. E5 -- Glaciology: land ice. (*38) -- Greenland. (*384.42) -- Ilulissat/Jakobshavn. |
| SPRI record no.: | 96609 |
LDR 01760naa#a2200000#a#4500 001 SPRI-96609 005 20230320182022.0 007 ta 008 230320s1989####enkb##|##|###|0||#0|eng#d 035 ## ‡aSPRI-96609 040 ## ‡aUkCU-P‡beng‡eaacr 100 1# ‡aPelto, M. S. 245 10 ‡aEquilibrium state of Jakobshavns Isbrae, West Greenland /‡cM.S. Pelto, Terence J. Hughes, H.H. Brecher. 260 ## ‡aCambridge :‡bInternational Glaciological Society,‡c1989. 300 ## ‡ap. 127-131 :‡btables, maps. 500 ## ‡aAnnals of Glaciology. Vol. 12 :127-131 (1989). 520 3# ‡aFastest persistent velocity of any known glacier. Measurement of surface velocities at calving front in July 1964, 1976, 1978, 1985, and 1986 yielded mean velocity of 20 m d⁻¹, with year-to-year variation of <1 m d⁻¹. Velocity measurements 10 km behind calving front indicated mean annual velocities of 17.1 m d⁻¹ compared with mid-summer velocities of 17.6 m d⁻¹: maximum possible decline in winter is then 7%. Calculation of volume flux into fjord is 3.72x10¹⁰ m³ a⁻¹±10%. Surface balance is 3.37x10¹⁰ m³\a d⁻¹±12%. Agreement between these balance calculations, long-term stability in glacier velocity, and reasonably stable glacier front indicate that glacier is in state of near equilibrium, with possible small negative balance. 650 07 ‡a551.324.54 -- Land ice, flow of particular glaciers: Jakobshavns Isbrae.‡2udc 650 07 ‡a551.32 -- Glaciology.‡2udc 650 07 ‡a551.324 -- Land ice.‡2udc 650 07 ‡a551.324.43 -- Land ice, regime and mass balance: Jakobshavns Isbrae.‡2udc 650 07 ‡aE5 -- Glaciology: land ice.‡2local 651 #7 ‡a(*38) -- Greenland.‡2udc 651 #7 ‡a(*384.42) -- Ilulissat/Jakobshavn.‡2udc 700 1# ‡aHughes, Terence J. 700 1# ‡aBrecher, H. H. 773 0# ‡7nnas ‡tAnnals of Glaciology. ‡gVol. 12 (1989) ‡wSPRI-60773 917 ## ‡aUnenhanced record from Muscat, imported 2019 948 3# ‡a20230320