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  • 1
    Online Resource
    Online Resource
    Glaciological and oceanographic evidence of high melt rates beneath Pine Island Glacier, West Antarctica
    Cambridge University Press (CUP) ; 1997
    In:  Journal of Glaciology Vol. 43, No. 143 ( 1997), p. 114-121
    Details
    In: Journal of Glaciology, Cambridge University Press (CUP), Vol. 43, No. 143 ( 1997), p. 114-121
    Abstract: Satellite imagery indicates that the floating terminus of Pine Island Glacier has changed little in extent over the past two decades. Data on the velocity and thickness of the glacier reveal that calving of 28 ± 4 Gta −1 accounts for only half of the ice input near the grounding line. The apparently steady configuration implies that the remainder of the input is lost by basal melting at a mean rate of 12 ± 3 ma −1 . Ocean circulation in Pine Island Bay transports +1°C waters beneath the glacier and temperatures recorded in melt-laden outflows show that heat loss from the ocean is consistent with the requirements of the calculated melt rate. The combination of iceberg calving and basal melting lies at the lower end of estimates for the total accumulation over the catchment basin, drawing into question previous estimates of a significantly positive mass budget for this part of the ice sheet.
    Type of Medium: Online Resource
    ISSN: 0022-1430 , 1727-5652
    URL: Article
    DOI: 10.1017/S0022143000002872
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 1997
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    SSG: 14
    Location Call Number Limitation Availability
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Seasonal circulation under the eastern Ross Ice Shelf, Antarctica
    American Geophysical Union (AGU) ; 1995
    In:  Journal of Geophysical Research: Oceans Vol. 100, No. C6 ( 1995-06-15), p. 10873-10885
    Details
    In: Journal of Geophysical Research: Oceans, American Geophysical Union (AGU), Vol. 100, No. C6 ( 1995-06-15), p. 10873-10885
    Abstract: An annual cycle of shelf water temperatures and salinities measured at depth near the eastern Ross Ice Shelf front is used to force a two‐dimensional thermohaline circulation model adapted to different subice paths in the vicinity of Roosevelt Island. These paths were assumed to have constant water column thicknesses of 160, 200, and 240 m and lengths of 460–800 km. Additional simulations with the longer cavity included a 80‐m thick interior water column in order to approximate conditions closer to the grounding line. Model results were compared with other long‐term measurements that showed outflow from beneath the ice shelf. Shelf water flowing into the cavity west of Roosevelt Island appears to follow a cyclonic route around the island. The ice shelf base loses mass at a rate of 18–27 cm yr −1 , with seasonal forcing increasing the spatial and temporal variability of circulation and property distributions in the larger cavities. Shallow cavities reduce the influence of shelf water variability with increasing length. Introducing a transient shelf water temperature rise of 0.01°C yr −1 for 100 years increases the melt rate by 4–5 times. However, this increase is smaller if salinity also decreases over the same period of time, as might be expected from the added meltwater component.
    Type of Medium: Online Resource
    ISSN: 0148-0227
    URL: Article
    DOI: 10.1029/95JC00753
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 1995
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    detail.hit.zdb_id: 3094104-0
    detail.hit.zdb_id: 2130824-X
    detail.hit.zdb_id: 2016813-5
    detail.hit.zdb_id: 2016810-X
    detail.hit.zdb_id: 2403298-0
    detail.hit.zdb_id: 2016800-7
    detail.hit.zdb_id: 161666-3
    detail.hit.zdb_id: 161667-5
    detail.hit.zdb_id: 2969341-X
    detail.hit.zdb_id: 161665-1
    detail.hit.zdb_id: 3094268-8
    detail.hit.zdb_id: 710256-2
    detail.hit.zdb_id: 2016804-4
    detail.hit.zdb_id: 3094181-7
    detail.hit.zdb_id: 3094219-6
    detail.hit.zdb_id: 3094167-2
    detail.hit.zdb_id: 2220777-6
    detail.hit.zdb_id: 3094197-0
    SSG: 16,13
    Location Call Number Limitation Availability
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    Online Resource
  • 3
    Online Resource
    Online Resource
    A numerical model of the Weddell Sea: Large‐scale circulation and water mass distribution
    American Geophysical Union (AGU) ; 1999
    In:  Journal of Geophysical Research: Oceans Vol. 104, No. C10 ( 1999-10-15), p. 23375-23391
    Details
    In: Journal of Geophysical Research: Oceans, American Geophysical Union (AGU), Vol. 104, No. C10 ( 1999-10-15), p. 23375-23391
    Abstract: A circumpolar model for regional studies of the wind‐driven and thermohaline circulation of the Southern Ocean including the major sub‐ice shelf areas is described. A first series of numerical experiments focusing on the Weddell Sea reveals a pronounced and persistent double‐cell structure of the Weddell Gyre with a maximum transport of ∼60 Sv, in agreement with observations. Experiments with artificial passive tracers point to the shallow shelf areas off the Filchner‐Ronne Ice Shelf as main locations for bottom water production. The trajectories of Lagrangian floats are used to determine the pathways and timescales of water mass spreading in the model. In addition, the effect of sub‐ice shelf forcing on the water mass characteristics is evaluated. It is shown that water modified in the sub‐ice cavities contributes significantly to the deep and bottom water formation along the continental slope, and affects the water mass characteristics throughout the Weddell Sea, by increasing the stability of the near‐surface stratification and preventing deep convection.
    Type of Medium: Online Resource
    ISSN: 0148-0227
    URL: Article
    DOI: 10.1029/1999JC900194
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 1999
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    detail.hit.zdb_id: 3094104-0
    detail.hit.zdb_id: 2130824-X
    detail.hit.zdb_id: 2016813-5
    detail.hit.zdb_id: 2016810-X
    detail.hit.zdb_id: 2403298-0
    detail.hit.zdb_id: 2016800-7
    detail.hit.zdb_id: 161666-3
    detail.hit.zdb_id: 161667-5
    detail.hit.zdb_id: 2969341-X
    detail.hit.zdb_id: 161665-1
    detail.hit.zdb_id: 3094268-8
    detail.hit.zdb_id: 710256-2
    detail.hit.zdb_id: 2016804-4
    detail.hit.zdb_id: 3094181-7
    detail.hit.zdb_id: 3094219-6
    detail.hit.zdb_id: 3094167-2
    detail.hit.zdb_id: 2220777-6
    detail.hit.zdb_id: 3094197-0
    SSG: 16,13
    Location Call Number Limitation Availability
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    Online Resource
  • 4
    Online Resource
    Online Resource
    Antarctic Ice Sheet melting in the southeast Pacific
    American Geophysical Union (AGU) ; 1996
    In:  Geophysical Research Letters Vol. 23, No. 9 ( 1996-05-01), p. 957-960
    Details
    In: Geophysical Research Letters, American Geophysical Union (AGU), Vol. 23, No. 9 ( 1996-05-01), p. 957-960
    Type of Medium: Online Resource
    ISSN: 0094-8276
    URL: Article
    DOI: 10.1029/96GL00723
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 1996
    detail.hit.zdb_id: 2021599-X
    detail.hit.zdb_id: 7403-2
    SSG: 16,13
    Location Call Number Limitation Availability
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    Online Resource
  • 5
    Online Resource
    Online Resource
    Glaciological and oceanographic evidence of high melt rates beneath Pine Island Glacier, West Antarctica
    International Glaciological Society ; 1997
    In:  Journal of Glaciology Vol. 43, No. 143 ( 1997), p. 114-121
    Details
    In: Journal of Glaciology, International Glaciological Society, Vol. 43, No. 143 ( 1997), p. 114-121
    Abstract: Satellite imagery indicates that the floating terminus of Pine Island Glacier has changed little in extent over the past two decades. Data on the velocity and thickness of the glacier reveal that calving of 28 ± 4 Gta −1 accounts for only half of the ice input near the grounding line. The apparently steady configuration implies that the remainder of the input is lost by basal melting at a mean rate of 12 ± 3 ma −1 . Ocean circulation in Pine Island Bay transports +1°C waters beneath the glacier and temperatures recorded in melt-laden outflows show that heat loss from the ocean is consistent with the requirements of the calculated melt rate. The combination of iceberg calving and basal melting lies at the lower end of estimates for the total accumulation over the catchment basin, drawing into question previous estimates of a significantly positive mass budget for this part of the ice sheet.
    Type of Medium: Online Resource
    ISSN: 0022-1430 , 1727-5652
    URL: Article
    DOI: 10.3189/S0022143000002872
    Language: English
    Publisher: International Glaciological Society
    Publication Date: 1997
    detail.hit.zdb_id: 2140541-4
    SSG: 14
    Location Call Number Limitation Availability
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    Online Resource
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