A "continuity-index" for assessing ice-sheet dynamics from radar-sounded internal layers
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A "continuity-index" for assessing ice-sheet dynamics from radar-sounded internal layers. / Karlsson, Nanna Bjørnholt; Rippin, David; Bingham, Robert G.; Vaughan, David .
In: Earth and Planetary Science Letters, Vol. 335-336, 2012, p. 88-94.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - A "continuity-index" for assessing ice-sheet dynamics from radar-sounded internal layers
AU - Karlsson, Nanna Bjørnholt
AU - Rippin, David
AU - Bingham, Robert G.
AU - Vaughan, David
PY - 2012
Y1 - 2012
N2 - Radio-echo sounding (RES) of polar icesheets reveals extensive internal layering. The degree of continuity of internal layering holds critical information about the ice-flow field, but previous analyses of this parameter have been limited to qualitative classifications. Here we present a new quantitative method for analyzing internallayercontinuity—named the continuity-index. When applied to data from Pine Island Glacier, West Antarctica, the new method clearly identifies a continuum of discontinuity of internallayers that corresponds with the current ice-velocity field. The analysis provides further support that the main trunk and tributaries are unlikely to have undergone substantial migration since the deposition of the internal layering. Significantly, our new method for analyzing internallayers is readily transferable across RES datasets, offering promise for data-led assessments of past and present flow dynamics across large areas of Antarctica and Greenland.
AB - Radio-echo sounding (RES) of polar icesheets reveals extensive internal layering. The degree of continuity of internal layering holds critical information about the ice-flow field, but previous analyses of this parameter have been limited to qualitative classifications. Here we present a new quantitative method for analyzing internallayercontinuity—named the continuity-index. When applied to data from Pine Island Glacier, West Antarctica, the new method clearly identifies a continuum of discontinuity of internallayers that corresponds with the current ice-velocity field. The analysis provides further support that the main trunk and tributaries are unlikely to have undergone substantial migration since the deposition of the internal layering. Significantly, our new method for analyzing internallayers is readily transferable across RES datasets, offering promise for data-led assessments of past and present flow dynamics across large areas of Antarctica and Greenland.
KW - Faculty of Science
M3 - Journal article
VL - 335-336
SP - 88
EP - 94
JO - Earth and Planetary Science Letters
JF - Earth and Planetary Science Letters
SN - 0012-821X
ER -
ID: 40313476