Tributaries of West Antarctic Ice streams revealed by RADARSAT interferometry

被引:152
作者
Joughin, I
Gray, L
Bindschadler, R
Price, S
Morse, D
Hulbe, C
Mattar, K
Werner, C
机构
[1] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA
[2] Canada Ctr Remote Sensing, Applicat Div, Ottawa, ON K1A 0Y7, Canada
[3] NASA, Oceans & Ice Branch, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[4] SAIC Gen Sci Corp, Beltsville, MD 20705 USA
[5] Univ Texas, Inst Geophys, Austin, TX 78759 USA
关键词
D O I
10.1126/science.286.5438.283
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
lnterferometric RADARSAT data are used to map ice motion in the source areas of four West Antarctic ice streams. The data reveal that tributaries, coincident with subglacial valleys, provide a spatially extensive transition between slow inland flow and rapid ice stream flow and that adjacent ice streams draw from shared source regions. Two tributaries flow into the stagnant ice stream C, creating an extensive region that is thickening at an average rate of 0.49 meters per year. This is one of the Largest rates of thickening ever reported in Antarctica.
引用
收藏
页码:283 / 286
页数:4
相关论文
共 37 条
  • [1] ALLEY RB, 1994, ANN GLACIOL, V20, P187, DOI 10.3189/172756494794587032
  • [2] CHANGES IN THE WEST ANTARCTIC ICE-SHEET
    ALLEY, RB
    WHILLANS, IM
    [J]. SCIENCE, 1991, 254 (5034) : 959 - 963
  • [3] Influence of subglacial geology on the position of a West Antarctic ice stream from seismic observations
    Anandakrishnan, S
    Blankenship, DD
    Alley, RB
    Stoffa, PL
    [J]. NATURE, 1998, 394 (6688) : 62 - 65
  • [4] [Anonymous], 1988, ANN GLACIOL
  • [5] [Anonymous], COMMUNICATION
  • [6] An improved elevation dataset for climate and ice-sheet modelling: validation with satellite imagery
    Bamber, JL
    Bindschadler, RA
    [J]. ANNALS OF GLACIOLOGY, VOL 25, 1997: PAPERS FROM THE INTERNATIONAL SYMPOSIUM ON REPRESENTATION OF THE CRYOSPHERE IN CLIMATE AND HYDROLOGICAL MODELS HELD AT VICTORIA, BRITISH COLUMBIA, CANADA, 12-15 AUGUST 1996, 1997, 25 : 439 - 444
  • [7] Influence of subglacial geology on the onset of a West Antarctic ice stream from aerogeophysical observations
    Bell, RE
    Blankenship, DD
    Finn, CA
    Morse, DL
    Scambos, TA
    Brozena, JM
    Hodge, SM
    [J]. NATURE, 1998, 394 (6688) : 58 - 62
  • [8] ANTARCTIC ICE STREAMS - A REVIEW
    BENTLEY, CR
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS, 1987, 92 (B9): : 8843 - 8858
  • [9] Actively surging West Antarctic ice streams and their response characteristics
    Bindschadler, R
    [J]. ANNALS OF GLACIOLOGY, VOL 24, 1997, 1997, 24 : 409 - 414
  • [10] Geoscience - Future of the west Antarctic ice sheet
    Bindschadler, R
    [J]. SCIENCE, 1998, 282 (5388) : 428 - 429