Isotopic signature of massive, buried ice in eastern Taylor Valley, Antarctica: Implications for its origin
Isotopic signature of massive, buried ice in eastern Taylor Valley, Antarctica: Implications for its origin
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南极洲泰勒谷东部大量埋冰的同位素特征：对其起源的影响
DOI：
10.1080/15230430.2022.2102510
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Lyons, W. Berry
中科院分区：
文献类型：
--
作者：
Gardner, Christopher B.;Diaz, Melisa A.;Smith, Devin F.;Fountain, Andrew G.;Levy, Joseph S.;Lyons, W. Berry
南极洲麦克默多干谷的沿海地区包含罗斯海漂移的沉积物，这是末次盛冰期南极西部冰盖前进时罗斯海冰盖留下的沉积物质。这些沉积物的大部分都是冰芯的，但关于这些冰中水的稳定同位素组成的数据很少或不完整，这些数据可能包含有价值的气候档案。在麦克默多干谷的“沿海解冻区”，广泛的热岩溶地面沉降表明，由于地面冰和永久冻土的融化，这些潜在的记录正在迅速消失。我们在Taylor Valley东部的罗斯海漂移中采集了大量埋藏冰样品，测量了δ18O- h2o和δ2H- h2o，测量值范围很广（δ18O =−27.7 ~−37.3‰，δ2H =−210 ~−295‰）。这些埋藏的冰沉积物没有显示出通过升华或蒸发变化的证据，沿着当地的大气水线绘制，其值表明在比现在条件更冷的气候下冰沉积。我们认为这些冰来自末次盛冰期的罗斯海冰盖，包含有价值且可获取的气候记录。
The coastal regions of the McMurdo Dry Valleys, Antarctica, contain deposits of the Ross Sea Drift, sedimentary material left from the Ross Sea ice sheet from the advance of the West Antarctic ice sheet during the Last Glacial Maximum. Much of this deposit is ice-cored, but data on the stable isotopic composition of water from this ice, which may contain a valuable climate archive, are sparse or incomplete. Widespread thermokarstic ground subsidence in this “coastal thaw zone” of the McMurdo Dry Valleys suggests that these potential records are rapidly being lost due to the melting of ground ice and permafrost. We collected samples of massive buried ice from the Ross Sea Drift in eastern Taylor Valley for δ18O-H2O and δ2H-H2O and measured a broad range of values (δ18O = −27.7 to −37.3 ‰; δ2H = −210 to −295 ‰). These buried ice deposits do not show evidence of alteration through sublimation or evaporation, plot along the local meteoric water line, and have values that indicate ice deposition under a colder climate than present conditions. We propose that this ice was sourced from the Ross Sea ice sheet during the Last Glacial Maximum and contains a valuable and accessible climate record.
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南极洲麦克默多干谷的年代际地形变化：热岩溶沉降、冰川变薄以及水储存从冰冻圈转移到水圈
影响因子：
3.9
作者：
Levy, J.S.;Fountain, A.G.;Obryk, M.K.;Telling, J.;Glennie, C.;Pettersson, R.;Gooseff, M.;Van Horn, D.J.
通讯作者：
Van Horn, D.J.
南极沿海溪流中的铁和营养物：对罗斯海初级生产的影响
DOI：
10.1029/2017jg004352
发表时间：
2018
期刊：
Journal of Geophysical Research: Biogeosciences
影响因子：
--
作者：
Olund, Sydney;Lyons, W. Berry;Welch, Susan A.;Welch, Kathy A.
通讯作者：
Welch, Kathy A.
影响因子：
3.4
作者：
V. Morgan
通讯作者：
V. Morgan
肯纳尔谷的埋冰：泰勒冰川晚更新世的遗迹
影响因子：
1.6
作者：
Kate M. Swanger
通讯作者：
Kate M. Swanger
南极洲泰勒谷的水道和永久冻土：寒冷沙漠生态系统中广泛而浅层的地下水连通性
DOI：
--
发表时间：
2011
期刊：
影响因子：
--
作者：
J. Levy;A. Fountain;M. Gooseff;K. Welch;W. Lyons
通讯作者：
W. Lyons