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  • 1
    Online Resource
    Online Resource
    The Antarctic Ice Sheet During the Last Glacial-Interglacial Cycle: A Three-Dimensional Experiment
    International Glaciological Society ; 1990
    In:  Annals of Glaciology Vol. 14 ( 1990), p. 115-119
    Details
    In: Annals of Glaciology, International Glaciological Society, Vol. 14 ( 1990), p. 115-119
    Abstract: A complete three-dimensional thermo-mechanical ice-shect model for the entire Antarctic ice sheet, including an ice shelf, grounding line-dynamics and isostatic bed adjustment, is employed to simulate the response of the ice sheet during the last glacial-interglacial cycle with respect to changing environmental conditions. To do this, the Vostok temperature signal is used to force changes in surface temperature and accumulation rate and sea level prescribed by a piecewise linear sawtooth function. Model calculations started at 160 ka B.P. In line with glacial geological evidence, the most pronounced fluctuations are found in the West Antarctic ice sheet and appear to be essentially controlled by changes in eustatic sea level. Grounding occurs more readily in the Weddell Sea than in the Ross Sea and, due to the long time scales involved, the ice sheet does not reach its full glacial extent until 16 ka B.p. The concomitant disintegration of the West Antarctic ice sheet is triggered by a rise in sea level and takes around 6000 years to complete. The ice sheet then halts close to the present state and no collapse takes place. This Holocene deglaciation appears to have added 6–8 million km 3 of ice to the world oceans, corresponding with an Antarctic contribution to world-wide sea level of 12–15 m.
    Type of Medium: Online Resource
    ISSN: 0260-3055 , 1727-5644
    URL: Article
    DOI: 10.3189/S0260305500008387
    Language: English
    Publisher: International Glaciological Society
    Publication Date: 1990
    detail.hit.zdb_id: 2122400-6
    SSG: 14
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  • 2
    Online Resource
    Online Resource
    Steady-state characteristics of the Greenland ice sheet under different climates
    Cambridge University Press (CUP) ; 1991
    In:  Journal of Glaciology Vol. 37, No. 125 ( 1991), p. 149-157
    Details
    In: Journal of Glaciology, Cambridge University Press (CUP), Vol. 37, No. 125 ( 1991), p. 149-157
    Abstract: The Greenland ice sheet is modelled to simulate its extent and volume in warmer climates, and to find out whether the ice sheet would re-form on the ice-free bedrock under present climatic conditions. The ice-sheet model is a three-dimensional thermo-mechanical model with a fine-resolution grid. The bedrock surface beneath the ice sheet was mapped using radio-echo-sounding measurements by the Electromagnetic Institute, Copenhagen. The model experiments show that increased temperature will result in ice-margin retreat, but the ice sheet is relatively stable; it takes a temperature rise of at least 6 deg for the ice sheet to disappear completely, which indicates that the ice sheet probably survived the last interglacial. Furthermore, it appears that the Greenland ice sheet is not a mere relict ice mass from a previously colder climate but that the ice sheet will still re-form on the bare bedrock under the present, or even slightly warmer, climatic conditions.
    Type of Medium: Online Resource
    ISSN: 0022-1430 , 1727-5652
    URL: Article
    DOI: 10.1017/S0022143000042908
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 1991
    detail.hit.zdb_id: 2140541-4
    SSG: 14
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    Online Resource
  • 3
    Online Resource
    Online Resource
    Formation and disintegration of the Antarctic ice sheet
    International Glaciological Society ; 1994
    In:  Annals of Glaciology Vol. 20 ( 1994), p. 336-340
    Details
    In: Annals of Glaciology, International Glaciological Society, Vol. 20 ( 1994), p. 336-340
    Abstract: A model of the Antarctic ice sheet has been used to simulate the ice sheet in warmer climates, in order to investigate what kind of ice-sheet geometries one can reasonably expect under what kind of climatic conditions and to discover which physical mechanisms may be involved to explain them. The results of these experiments reveal the considerable stability of; in particular, the East Antarctic ice sheet. It would require a temperature rise of between 17 and 20 K above present levels to remove this ice sheet from the subglacial basins in the interior of the continent and of 25 K to melt down the Antarctic ice sheet completely. For a temperature rise below 5 K, the model actually predicts a larger Antarctic ice sheet than today as a result of increased snowfall, whereas the west Antarctic ice sheet was round not to survive temperatures more than 8–10 K above present values. Furthermore, basal temperature conditions in these experiments point to the problems involved in raising the base of the ice sheet to the pressure-melting point over the large areas necessary to consider the possibility of sliding instability. These results bear on a lively debate regarding the late Cenozoic glacial history of Antarctica. Particularly, based on these findings, it is difficult to reconcile a highly variable East Antarctic ice sheet until the Pliocene with modest warming recorded in, for instance, the deep-sea records for the late Neogene.
    Type of Medium: Online Resource
    ISSN: 0260-3055 , 1727-5644
    URL: Article
    DOI: 10.3189/172756494794587221
    Language: English
    Publisher: International Glaciological Society
    Publication Date: 1994
    detail.hit.zdb_id: 2122400-6
    SSG: 14
    Location Call Number Limitation Availability
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    Online Resource
  • 4
    Online Resource
    Online Resource
    Formation and disintegration of the Antarctic ice sheet
    International Glaciological Society ; 1994
    In:  Annals of Glaciology Vol. 20 ( 1994), p. 336-340
    Details
    In: Annals of Glaciology, International Glaciological Society, Vol. 20 ( 1994), p. 336-340
    Abstract: A model of the Antarctic ice sheet has been used to simulate the ice sheet in warmer climates, in order to investigate what kind of ice-sheet geometries one can reasonably expect under what kind of climatic conditions and to discover which physical mechanisms may be involved to explain them. The results of these experiments reveal the considerable stability of; in particular, the East Antarctic ice sheet. It would require a temperature rise of between 17 and 20 K above present levels to remove this ice sheet from the subglacial basins in the interior of the continent and of 25 K to melt down the Antarctic ice sheet completely. For a temperature rise below 5 K, the model actually predicts a larger Antarctic ice sheet than today as a result of increased snowfall, whereas the west Antarctic ice sheet was round not to survive temperatures more than 8–10 K above present values. Furthermore, basal temperature conditions in these experiments point to the problems involved in raising the base of the ice sheet to the pressure-melting point over the large areas necessary to consider the possibility of sliding instability. These results bear on a lively debate regarding the late Cenozoic glacial history of Antarctica. Particularly, based on these findings, it is difficult to reconcile a highly variable East Antarctic ice sheet until the Pliocene with modest warming recorded in, for instance, the deep-sea records for the late Neogene.
    Type of Medium: Online Resource
    ISSN: 0260-3055 , 1727-5644
    URL: Article
    DOI: 10.1017/S0260305500016657
    Language: English
    Publisher: International Glaciological Society
    Publication Date: 1994
    detail.hit.zdb_id: 2122400-6
    SSG: 14
    Location Call Number Limitation Availability
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    Online Resource
  • 5
    Online Resource
    Online Resource
    Steady-state characteristics of the Greenland ice sheet under different climates
    International Glaciological Society ; 1991
    In:  Journal of Glaciology Vol. 37, No. 125 ( 1991), p. 149-157
    Details
    In: Journal of Glaciology, International Glaciological Society, Vol. 37, No. 125 ( 1991), p. 149-157
    Abstract: The Greenland ice sheet is modelled to simulate its extent and volume in warmer climates, and to find out whether the ice sheet would re-form on the ice-free bedrock under present climatic conditions. The ice-sheet model is a three-dimensional thermo-mechanical model with a fine-resolution grid. The bedrock surface beneath the ice sheet was mapped using radio-echo-sounding measurements by the Electromagnetic Institute, Copenhagen. The model experiments show that increased temperature will result in ice-margin retreat, but the ice sheet is relatively stable; it takes a temperature rise of at least 6 deg for the ice sheet to disappear completely, which indicates that the ice sheet probably survived the last interglacial. Furthermore, it appears that the Greenland ice sheet is not a mere relict ice mass from a previously colder climate but that the ice sheet will still re-form on the bare bedrock under the present, or even slightly warmer, climatic conditions.
    Type of Medium: Online Resource
    ISSN: 0022-1430 , 1727-5652
    URL: Article
    DOI: 10.3189/S0022143000042908
    Language: English
    Publisher: International Glaciological Society
    Publication Date: 1991
    detail.hit.zdb_id: 2140541-4
    SSG: 14
    Location Call Number Limitation Availability
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    Online Resource
  • 6
    Online Resource
    Online Resource
    Glaciological Modelling of the Late Cenozoic East Antarctic Ice Sheet: Stability or Dynamism?
    Informa UK Limited ; 1993
    In:  Geografiska Annaler: Series A, Physical Geography Vol. 75, No. 4 ( 1993-12), p. 221-238
    Details
    In: Geografiska Annaler: Series A, Physical Geography, Informa UK Limited, Vol. 75, No. 4 ( 1993-12), p. 221-238
    Type of Medium: Online Resource
    ISSN: 0435-3676 , 1468-0459
    URL: Article
    DOI: 10.1080/04353676.1993.11880395
    RVK:
    RS 59121
    Language: English
    Publisher: Informa UK Limited
    Publication Date: 1993
    detail.hit.zdb_id: 3694-8
    detail.hit.zdb_id: 1480727-0
    SSG: 14
    Location Call Number Limitation Availability
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    Online Resource
  • 7
    Online Resource
    Online Resource
    The Greenland ice sheet and greenhouse warming
    Elsevier BV ; 1991
    In:  Palaeogeography, Palaeoclimatology, Palaeoecology Vol. 89, No. 4 ( 1991-3), p. 399-412
    Details
    In: Palaeogeography, Palaeoclimatology, Palaeoecology, Elsevier BV, Vol. 89, No. 4 ( 1991-3), p. 399-412
    Type of Medium: Online Resource
    ISSN: 0031-0182
    URL: Article
    DOI: 10.1016/0031-0182(91)90174-P
    RVK:
    TE 1000
    Language: English
    Publisher: Elsevier BV
    Publication Date: 1991
    detail.hit.zdb_id: 1497393-5
    detail.hit.zdb_id: 417718-6
    SSG: 12
    SSG: 13
    SSG: 14
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  • 8
    Online Resource
    Online Resource
    The Greenland ice sheet through the last glacial-interglacial cycle
    Elsevier BV ; 1991
    In:  Global and Planetary Change Vol. 4, No. 4 ( 1991-10), p. 385-394
    Details
    In: Global and Planetary Change, Elsevier BV, Vol. 4, No. 4 ( 1991-10), p. 385-394
    Type of Medium: Online Resource
    ISSN: 0921-8181
    URL: Article
    DOI: 10.1016/0921-8181(91)90004-G
    RVK:
    RA 1000
    Language: English
    Publisher: Elsevier BV
    Publication Date: 1991
    detail.hit.zdb_id: 20361-0
    detail.hit.zdb_id: 2016967-X
    SSG: 13
    SSG: 14
    Location Call Number Limitation Availability
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    Online Resource
  • 9
    Online Resource
    Online Resource
    The Greenland ice sheet and greenhouse warming
    Elsevier BV ; 1991
    In:  Global and Planetary Change Vol. 3, No. 4 ( 1991-3), p. 399-412
    Details
    In: Global and Planetary Change, Elsevier BV, Vol. 3, No. 4 ( 1991-3), p. 399-412
    Type of Medium: Online Resource
    ISSN: 0921-8181
    URL: Article
    DOI: 10.1016/0921-8181(91)90119-H
    RVK:
    RA 1000
    Language: English
    Publisher: Elsevier BV
    Publication Date: 1991
    detail.hit.zdb_id: 20361-0
    detail.hit.zdb_id: 2016967-X
    SSG: 13
    SSG: 14
    Location Call Number Limitation Availability
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    Online Resource
  • 10
    Online Resource
    Online Resource
    Formation and disintegration of the Antarctic ice sheet
    International Glaciological Society ; 1994
    In:  Annals of Glaciology Vol. 20 ( 1994), p. 336-340
    Details
    In: Annals of Glaciology, International Glaciological Society, Vol. 20 ( 1994), p. 336-340
    Abstract: A model of the Antarctic ice sheet has been used to simulate the ice sheet in warmer climates, in order to investigate what kind of ice-sheet geometries one can reasonably expect under what kind of climatic conditions and to discover which physical mechanisms may be involved to explain them. The results of these experiments reveal the considerable stability of; in particular, the East Antarctic ice sheet. It would require a temperature rise of between 17 and 20 K above present levels to remove this ice sheet from the subglacial basins in the interior of the continent and of 25 K to melt down the Antarctic ice sheet completely. For a temperature rise below 5 K, the model actually predicts a larger Antarctic ice sheet than today as a result of increased snowfall, whereas the west Antarctic ice sheet was round not to survive temperatures more than 8–10 K above present values. Furthermore, basal temperature conditions in these experiments point to the problems involved in raising the base of the ice sheet to the pressure-melting point over the large areas necessary to consider the possibility of sliding instability. These results bear on a lively debate regarding the late Cenozoic glacial history of Antarctica. Particularly, based on these findings, it is difficult to reconcile a highly variable East Antarctic ice sheet until the Pliocene with modest warming recorded in, for instance, the deep-sea records for the late Neogene.
    Type of Medium: Online Resource
    ISSN: 0260-3055 , 1727-5644
    URL: Article
    DOI: 10.3189/1994AoG20-1-336-340
    Language: English
    Publisher: International Glaciological Society
    Publication Date: 1994
    detail.hit.zdb_id: 2122400-6
    SSG: 14
    Location Call Number Limitation Availability
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    Online Resource
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