A site for deep ice coring at West Hercules Dome: results from ground-based geophysics and modeling
A site for deep ice coring at West Hercules Dome: results from ground-based geophysics and modeling
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西赫拉克勒斯圆顶深冰取芯地点：地面地球物理学和建模的结果
DOI：
10.1017/jog.2022.80
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发表时间：
2022
影响因子：
3.4
通讯作者：
Steig, Eric J.
中科院分区：
文献类型：
--
作者：
Fudge, T. J.;Hills, Benjamin H.;Horlings, Annika N.;Holschuh, Nicholas;Christian, John Erich;Davidge, Lindsey;Hoffman, Andrew;O'Connor, Gemma K.;Christianson, Knut;Steig, Eric J.
由于未受干扰的内部分层、气候环境和获得末次间冰期（南极西部冰盖可能崩塌）代用记录的潜力，南极洲的Hercules Dome长期以来一直被认为是一个有前景的深冰芯地点。我们使用多个破冰雷达系统进行了一次地球物理调查，以确定大力神丘深层冰芯的潜在位置。最近的卫星观测显示，地表地形比以前认识到的要复杂得多。最突出的圆顶，我们称之为“西圆顶”，是最有希望形成深冰芯的区域，原因如下：(1)床-共形雷达反射表明层扰动最小，并延伸到冰底数十米以内；(2)隔层下测得的垂直冰速剖面的形状和利用3次地热通量遥感估算的冰温都证明了床层可能是冻结的；(3)层减薄模型在床层上方45 ~ 90 m处有132 ka的冰，年层厚约为1 mm，满足了详细分析LIG期所需的分辨率和保存性。
Hercules Dome, Antarctica, has long been identified as a prospective deep ice core site due to the undisturbed internal layering, climatic setting and potential to obtain proxy records from the Last Interglacial (LIG) period when the West Antarctic ice sheet may have collapsed. We performed a geophysical survey using multiple ice-penetrating radar systems to identify potential locations for a deep ice core at Hercules Dome. The surface topography, as revealed with recent satellite observations, is more complex than previously recognized. The most prominent dome, which we term ‘West Dome’, is the most promising region for a deep ice core for the following reasons: (1) bed-conformal radar reflections indicate minimal layer disturbance and extend to within tens of meters of the ice bottom; (2) the bed is likely frozen, as evidenced by both the shape of the measured vertical ice velocity profiles beneath the divide and modeled ice temperature using three remotely sensed estimates of geothermal flux and (3) models of layer thinning have 132 ka old ice at 45–90 m above the bed with an annual layer thickness of ~1 mm, satisfying the resolution and preservation needed for detailed analysis of the LIG period.
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西南极洲深部穿透雷达调查分析，US-ITASE 2001
DOI：
--
发表时间：
2003
期刊：
影响因子：
--
作者：
B. Welch;R. Jacobel
通讯作者：
R. Jacobel
DOI：
10.1002/2015jf003668
发表时间：
2016-05
期刊：
Journal of Geophysical Research: Earth Surface
影响因子：
--
作者：
M. Koutnik;T. Fudge;H. Conway;E. Waddington;T. Neumann;K. Cuffey;C. Buizert;K. Taylor
通讯作者：
M. Koutnik;T. Fudge;H. Conway;E. Waddington;T. Neumann;K. Cuffey;C. Buizert;K. Taylor
影响因子：
5
作者：
Holme, Christian;Gkinis, Vasileios;Vinther, Bo M.
通讯作者：
Vinther, Bo M.
南极湖的地球物理学和热力学表明稳定性和区域性解冻床
影响因子：
5.2
作者：
Hills, Benjamin H.;Christianson, Knut;Hoffman, Andrew O.;Fudge, T. J.;Holschuh, Nicholas;Kahle, Emma C.;Conway, Howard;Christian, John E.;Horlings, Annika N.;O’Connor, Gemma K.
通讯作者：
O’Connor, Gemma K.
影响因子：
5.2
作者：
Fudge, T. J.;Markle, Bradley R.;Koutnik, Michelle
通讯作者：
Koutnik, Michelle