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  • 1
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    Observed velocity fluctuations on a major Antarctic ice stream (1988)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Recent ice velocity measurements on the major Antarctic Ice Stream B are compared with those collected 10 years ago. The results show that the ice flow in the mouth of Ice Stream B has decelerated by about 20 percent. The possible causes of this deceleration are discussed on the basis of present knowledge of current regional dynamics, and the possible effects of this deceleration on future ice stream behavior are examined.
    Keywords: GEOPHYSICS
    Type: Nature (ISSN 0028-0836); 334; 695-697
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Data report for the Siple Coast (Antarctica) project (1988)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: This report presents data collected during three field seasons of glaciological studies in the Antarctica and describes the methods employed. The region investigated covers the mouths of Ice Streams B and C (the Siple Coast) and Crary Ice Rise on the Ross Ice Shelf. Measurements included in the report are as follows: surface velocity and deformation from repeated satellite geoceiver positions; surface topography from optical levelling; radar sounding of ice thickness; accumulation rates; near-surface densities and temperature profiles; and mapping from aerial photography.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TM-100708 , NAS 1.15:100708 , REPT-88B-0214
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Force, mass, and energy budgets of the Crary Ice Rise complex, Antarctica (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: The stress, mass, and energy-dissipation budgets of Crary Ice Rise are analyzed using field data collected during the 1983-1985 austral summers and in previous field programs. In addition, the net back pressure and ice-discharge rate along the grounding lines of ice streams are calculated to assess the effect of the ice rise on the surrounding flow. Comparison of the ice-rise budgets with the analysis of grounding-line data confirms the influence of the ice rise on ice-sheet stability, and suggests that Crary Ice Rise may have formed recently in response to an acceleration of one of the ice streams. It is concluded that feedback between ice-stream acceleration and ice-rise formation may control the future evolution of the above ice stream and promote long-term grounding-line stability in the face of strong natural fluctuations.
    Keywords: GEOPHYSICS
    Type: Journal of Glaciology (ISSN 0022-1430); 33; 114; 218-230
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Ice dynamics at the mouth of ice stream B, Antarctica (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Data collected in the region of the mouth of ice stream B, West Antarctica, during three field seasons are presented. The physical characteristics of the mouth of ice stream B are described, and the dynamics in the vicinity of the DNB network are discussed. The dynamics of ice stream B from DNB to the grounding line is briefly considered, and a force analysis of the grounding line region is made. The results demonstrate that the dynamic situation of the region at the mouth of ice stream B is distinctly different from either the greater portion of the ice stream upstream or the Ross ice shelf downstream.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research (ISSN 0148-0227); 92; 8885-889
    Format: text
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