Studies on the variability of the Greenland Ice Sheet and climate

Studies on the variability of the Greenland Ice Sheet and climate
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格陵兰冰盖和气候变化的研究

DOI:
10.1016/j.polar.2020.100557
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发表时间:
2021
期刊:
影响因子:
1.8
通讯作者:
Jun'ichi Okuno
Jun'ichi Okuno
中科院分区:
地球科学4区
文献类型:
--
作者:
Kumiko Goto-Azuma;Tomoyuki Homma;Tomotaka Saruya;Fumio Nakazawa;Yuki Komuro;Naoko Nagatsuka;Motohiro Hirabayashi;Yutaka Kondo;Makoto Koike;Teruo Aoki;Ralf Greve;Jun'ichi Okuno

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我们回顾了北极可持续发展挑战(ArcCS)项目研究主题2“格陵兰地区冰盖、冰川和环境的变化”下副主题(1)“格陵兰冰盖和气候的变化”的主要科学成果。我们参加了由丹麦牵头的国际东格陵兰冰芯项目(EGRIP),在取芯地点附近进行了雪坑观测,并重建了过去10年的地表物质平衡。对格陵兰西北部冰芯的分析显示,在过去350年里,黑碳浓度的时间变化和在过去100年里,矿物尘埃的时间变化。为了了解冰盖流动的机制,这是必要的海平面上升的准确预测,我们进行了实验室实验,使用人工冰,并推导出一个改进的流动定律含杂质的冰。冰盖模拟包括杂质和冰流动力学的影响进行了改进。作为耦合模型相互比较项目第6阶段(ISMIP 6)的冰盖模型相互比较项目的一部分,我们模拟了冰盖质量损失和对21世纪及以后海平面上升的贡献。此外,我们开发了一个冰川均衡调整模型,以更好地约束冰盖模型。
We review major scientific results from Subtheme (1) "Variability of the Greenland Ice Sheet and climate" under Research Theme 2 "Variations in the ice sheet, glaciers, and the environment in the Greenland region" of the Arctic Challenge for Sustainability (ArCS) project. We participated in the international East Greenland Ice Core Project (EGRIP) led by Denmark, conducted snow pit observations near the coring site and reconstructed the surface mass balance over the past 10 years. Analyses of an ice core from Northwest Greenland revealed temporal variability in black carbon concentration over the past 350 years and in mineral dust over the past 100 years. To understand the mechanisms of ice-sheet flow, which is necessary for accurate predictions of sea level rise, we conducted laboratory experiments using artificial ice and derived an improved flow law for ice containing impurities. Ice sheet modeling was improved by including effects of impurities and ice stream dynamics. As part of the Ice Sheet Model Intercomparison Project for the Coupled Model Intercomparison Project Phase 6 (ISMIP6), we simulated ice sheet mass loss and contribution to sea level rise over the 21st century and beyond. Furthermore, we developed a Glacial Isostatic Adjustment model to better constrain ice sheet models.
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