Deriving Melt Rates at a Complex Ice Shelf Base Using In Situ Radar: Application to Totten Ice Shelf
Deriving Melt Rates at a Complex Ice Shelf Base Using In Situ Radar: Application to Totten Ice Shelf
复制标题
使用原位雷达推导复杂冰架底部的融化速率:在托滕冰架上的应用
DOI:
10.1029/2021gl092692
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发表时间:
2021
影响因子:
5.2
通讯作者:
B. Galton
中科院分区:
文献类型:
--
作者:
Irena Vaňková;Sue Cook;J. P. Winberry;K. Nicholls;B. Galton
A phase‐sensitive radar (ApRES) was deployed on Totten Ice Shelf to provide the first in situ basal melt estimate at this dynamic East Antarctic ice shelf. Observations of internal ice dynamics at tidal time scales showed that early arrivals from off‐nadir reflectors obscure the true depth of the ice shelf base. Using the observed tidal deformation, the true base was found to lie at 1,910–1,950‐m depth, at 350–400 m greater range than the first reflection from an ice‐ocean interface. The robustness of the basal melt rate estimate was increased by using multiple basal reflections over the radar footprint, yielding a melt rate of 22 ± 2.1 m a−1. The ApRES estimate is over 40% lower than the three existing satellite estimates covering Totten Ice Shelf. This difference in basal melt is dynamically significant and highlights the need for independent melt rate estimates using complementary instrumentation and techniques that rely on different sets of assumptions.
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影响因子:
18.3
作者:
Adusumilli S;Fricker HA;Medley B;Padman L;Siegfried MR
通讯作者:
Siegfried MR
影响因子:
18.3
作者:
Greenbaum, J. S.;Blankenship, D. D.;Siegert, M. J.
通讯作者:
Siegert, M. J.
影响因子:
5.2
作者:
Dutrieux, Pierre;Stewart, Craig;Steffen, Konrad
通讯作者:
Steffen, Konrad
影响因子:
5.2
作者:
Arthern, Robert J.;Williams, C. Rosie
通讯作者:
Williams, C. Rosie
DOI:
10.1144/sp461.6
发表时间:
2018-01-01
期刊:
EXPLORATION OF SUBSURFACE ANTARCTICA: UNCOVERING PAST CHANGES AND MODERN PROCESSES
影响因子:
--
作者:
Roberts, Jason;Galton-Fenzi, Benjamin K.;Siegert, Martin J.
通讯作者:
Siegert, Martin J.