High Spatial Melt Rate Variability Near the Totten Glacier Grounding Zone Explained by New Bathymetry Inversion
High Spatial Melt Rate Variability Near the Totten Glacier Grounding Zone Explained by New Bathymetry Inversion
复制标题
新的测深反演解释了托滕冰川接地区附近的高空间融化速率变化
DOI:
10.1029/2023gl102960
复制
发表时间:
2023
影响因子:
5.2
通讯作者:
Galton‐Fenzi, Benjamin K.
中科院分区:
文献类型:
--
作者:
Vaňková, Irena;Winberry, J. Paul;Cook, Sue;Nicholls, Keith W.;Greene, Chad A.;Galton‐Fenzi, Benjamin K.
Totten Glacier is a fast‐moving East Antarctic outlet with the potential for significant future sea‐level contributions. We deployed four autonomous phase‐sensitive radars on its ice shelf to monitor ice‐ocean interactions near its grounding zone and made active source seismic observations to constrain gravity‐derived bathymetry models. We observe an asymmetry in basal melting with mean melt rates along the grounding zone differing by up to 20 m/a. Our new bathymetry model reveals that this melt rate asymmetry coincides with an asymmetry in water column thickness and that the low‐melting ice‐shelf portion is shielded from the main cavity circulation. A 2‐year record yields year‐to‐year melt rate variability of 7–9 m/a with no seasonal cycle. Our results highlight the key role of bathymetry near grounding lines for accurate modeling of ice‐shelf melt, and the importance of sustained multi‐year monitoring, especially at ice‐shelf cavities where the dominant melt rate drivers vary primarily inter‐annually.
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影响因子:
64.8
作者:
Davis, Peter E. D.;Nicholls, Keith W.;Holland, David M.;Schmidt, Britney E.;Washam, Peter;Riverman, Kiya L.;Arthern, Robert J.;Vankova, Irena;Eayrs, Clare;Smith, James A.;Anker, Paul G. D.;Mullen, Andrew D.;Dichek, Daniel;Lawrence, Justin D.;Meister, Matthew M.;Clyne, Elisabeth;Basinski-Ferris, Aurora;Rignot, Eric;Queste, Bastien Y.;Boehme, Lars;Heywood, Karen J.;Anandakrishnan, Sridhar;Makinson, Keith
通讯作者:
Makinson, Keith
DOI:
10.1029/2022jc018879
发表时间:
2022
期刊:
Journal of Geophysical Research: Oceans
影响因子:
--
作者:
Irena Vaňková;K. Nicholls
通讯作者:
K. Nicholls
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:
Irena Vaňková;Sue Cook;J. P. Winberry;K. Nicholls;B. Galton
通讯作者:
B. Galton