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  • Cambridge University Press (CUP)  (2)
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  • Cambridge University Press (CUP)  (2)
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  • 1
    Online Resource
    Online Resource
    Internal and basal ice changes near the grounding line derived from radio-echo sounding
    Cambridge University Press (CUP) ; 1996
    In:  Journal of Glaciology Vol. 42, No. 140 ( 1996), p. 103-109
    Details
    In: Journal of Glaciology, Cambridge University Press (CUP), Vol. 42, No. 140 ( 1996), p. 103-109
    Abstract: Evidence of changing basal and internal ice properties near the grounding line was derived from airborne radio-echo-sounder observations of the ice sheet around the Sør Rondane Mountains, Antarctica. From the trailing figure of the bottom-echo signal, the roughness of the ice bottom near the grounding line was inferred. Results show that the specular components of scattering begin to appear on the ice-shelf side of the grounding line. Furthermore, double-trip echoes were observed with a strong scattering in the shelf area, and their boundary of occurrence was very close to the grounding line. This is evidence of interaction between ice and sea water at the bottom of the ice shelf. We also examined the occurrence of internal layered echoes. In most of the area around the mountains, internal echoes were observed continously, but they were not found at or close to the ice shelf. The boundary between the appearance and disappearance of internal-layer echoes is distinct, and occurs 20–30 km inland from the grounding line. These results suggest that some major change may occur in the internal ice on the inland side of the grounding line.
    Type of Medium: Online Resource
    ISSN: 0022-1430 , 1727-5652
    URL: Article
    DOI: 10.1017/S0022143000030562
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 1996
    detail.hit.zdb_id: 2140541-4
    SSG: 14
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    Online Resource
  • 2
    Online Resource
    Online Resource
    A study of sea ice in the Sea of Okhotsk with SAR data
    Cambridge University Press (CUP) ; 1995
    In:  Polar Record Vol. 31, No. 178 ( 1995-07), p. 305-314
    Details
    In: Polar Record, Cambridge University Press (CUP), Vol. 31, No. 178 ( 1995-07), p. 305-314
    Abstract: The ‘Okhotsk Sea Ice Observation Experiment’ 93' was carried out in February 1993 in the southern part of the Sea of Okhotsk and in Lake Saroma, Japan. The aim of the experiment was to investigate how effectively Synthetic Aperture Radar (SAR) can monitor sea ice in this region. Satellite data from JERS-1/SAR (J-SAR), ERS-1/SAR CESAR), and SPOT-2/HRV, as well as data from airborne sensors and ground-truth data, were utilized. From the overall analysis of those data, several results were obtained. First, the range of backscatter of the ice cover on Lake Saroma was determined, as well as a relation between ice type and backscatter. Second, a method for making SAR mosaic images was developed to monitor sea ice over a wide area. When comparing J-SAR(L-band) data with E-SAR(C-band) data acquired simultaneously over the same area, J-SAR proved to be superior to E-SAR in showing the existence of sea ice. And third, it was confirmed that the backscatter of E-SAR was correlated to the ice thickness, which may be explained by the relation between the backscatter and the ice-surface temperature.
    Type of Medium: Online Resource
    ISSN: 0032-2474 , 1475-3057
    URL: Article
    DOI: 10.1017/S0032247400013851
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 1995
    detail.hit.zdb_id: 3926-3
    detail.hit.zdb_id: 2100301-4
    SSG: 14
    Location Call Number Limitation Availability
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