Simulated last deglaciation of the Barents Sea Ice Sheet primarily driven by oceanic conditions
Simulated last deglaciation of the Barents Sea Ice Sheet primarily driven by oceanic conditions
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模拟主要由海洋条件驱动的巴伦支海冰盖的最后一次冰消期
DOI：
10.5194/egusphere-egu2020-17640
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发表时间：
2020
影响因子：
4
通讯作者：
Mangerud Jan
中科院分区：
文献类型：
--
作者：
M. Petrini;Colleoni Florence;K. Nina;Hughes Anna L. C.;Camerlenghi Angelo;Rebesco Michele;Lucchi Renata G.;Forte Emanuele;Colucci Renato R.;Noormets Riko;Mangerud Jan
<p>在末次盛冰期（距今 21 年前），一个相互关联的冰盖复合体，统称为欧亚冰盖，覆盖了欧洲最西北部、俄罗斯和巴伦支海，与南部的斯堪的纳维亚冰盖相连。由于共同的地质特征，该冰群的巴伦支海部分被视为当今南极西部冰盖的古类似物。调查驱动巴伦支海冰盖最后一次冰川消融的关键过程是解释南极洲在数千年时间尺度上冰川变化的最新观测结果的重要工具。我们展示了巴伦支海冰盖最后一次冰消期的冰盖模型模拟统计集合的结果，所有这些结果都是由 AOGCM 模拟得出的瞬态大气和海洋条件所迫使的。根据基于数据的 DATED-1 重建来评估瞬态模拟的整体。我们发现，巴伦支海冰盖的模拟消融主要是由海洋强迫驱动的，海平面上升和表面融化在相对较短的时间内放大了冰盖对海洋变暖的敏感性。尽管西部和东部冰盖边缘存在较大的模型/数据不匹配，但模拟和 DATED-1 冰川消融情景与巴伦支海中部和北部冰川消退的时间非常吻合。海洋强迫在我们的模拟中发挥的主要作用表明，如果当前海洋变暖的趋势持续下去，西南极冰盖的长期稳定性可能会受到威胁。</p>
<p>An interconnected complex of ice sheets, collectively referred to as the Eurasian ice sheets, covered north-westernmost Europe, Russia and the Barents Sea during the Last Glacial Maximum (around 21 ky BP), connecting to the Scandinavian Ice Sheet to the south. Due to common geological features, the Barents Sea component of this ice complex is seen as a paleo-analogue for the present-day West Antarctic Ice Sheet. Investigating key processes driving the last deglaciation of the Barents Sea Ice Sheet represents an important tool to interpret recent observations in Antarctica over the multi-millennial temporal scale of glaciological changes. We present results from a statistical ensemble of ice sheet model simulations of the last deglaciation of the Barents Sea Ice Sheet, all forced with transient atmospheric and oceanic conditions derived from AOGCM simulations. The ensemble of transient simulations is evaluated against the data-based DATED-1 reconstruction. We find that the simulated deglaciation of the Barents Sea Ice Sheet is primarily driven by the oceanic forcing, with sea level rise and surface melting amplifying the ice sheet sensitivity to ocean warming over relatively short intervals. Despite a large model/data mismatch at the western and eastern ice sheet margins, the simulated and DATED-1 deglaciation scenarios agree well on the timing of the deglaciation of the central and northern Barents Sea. The primary role played by ocean forcing in our simulations suggests that the long-term stability of the West Antarctic Ice Sheet could be at stake if the current trend in ocean warming will continue.</p>
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影响因子：
16.6
作者：
Ng HC;Robinson LF;McManus JF;Mohamed KJ;Jacobel AW;Ivanovic RF;Gregoire LJ;Chen T
通讯作者：
Chen T
影响因子：
30.7
作者：
Favier, L.;Durand, G.;Le Brocq, A. M.
通讯作者：
Le Brocq, A. M.
initMIP-Antarctica：ISMIP6的冰盖模型初始化实验
DOI：
10.5194/tc-13-1441-2019
发表时间：
2019
期刊：
The Cryosphere
影响因子：
--
作者：
Seroussi H
通讯作者：
Seroussi H
影响因子：
5.2
作者：
Gudmundsson, G. H.;Krug, J.;Gagliardini, O.
通讯作者：
Gagliardini, O.
晚威克塞尔冰盖从斯瓦尔巴群岛东部孔卡尔斯地周围水域全冰川流动和退缩的证据
影响因子：
4
作者：
Hogan K
通讯作者：
Hogan K