Maximum Southwest Greenland Ice Sheet Recession in the Early Holocene
Maximum Southwest Greenland Ice Sheet Recession in the Early Holocene
复制标题
全新世早期格陵兰西南部冰盖最大退缩
DOI：
10.1029/2019gl083164
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发表时间：
2020
影响因子：
5.2
通讯作者：
J. Cuzzone
中科院分区：
文献类型：
--
作者：
A. Lesnek;J. Briner;N. Young;J. Cuzzone
确定北极全新世最大变暖的时间对于理解全球气候系统对外部强迫的响应至关重要。在格陵兰岛，获取整个全新世气候记录的挑战阻碍了确定全新世最高温度发生时间的努力。重建陆地冰盖的历史可以填补这一空白，因为这些冰盖地区对夏季温度的反应很敏感。我们合成新的和公布的10 Be和14 C年龄从格陵兰岛西南部格陵兰岛冰盖边缘位置从12到7万年，并计算从12到0万年的退缩率。我们发现，最大的格陵兰冰盖衰退发生在~10.4和9.1 ka之间。我们的重建表明，夏季气温在格陵兰岛西南部的最高约10.4至9.1万年，提供支持的区域全新世早期热最大。这些结果可以作为与冰盖和气候模式模拟进行比较的基准。
Establishing the timing of maximum Holocene warmth in the Arctic is critical for understanding global climate system response to external forcing. In Greenland, challenges in obtaining climate records that span the full Holocene have hampered efforts to robustly identify when the Holocene Thermal Maximum occurred. Reconstructing land‐based ice sheet history can fill this gap because these ice sheet regions respond sensitively to summer temperature. We synthesize new and published 10Be and 14C ages from southwest Greenland to map Greenland ice sheet margin positions from 12 to 7 ka and calculate retreat rates from 12 to 0 ka. We found that maximum Greenland ice sheet recession occurred between ~10.4 and 9.1 ka. Our reconstruction suggests that summer air temperatures in southwest Greenland were highest from ~10.4 to 9.1 ka, providing support for an early regional Holocene Thermal Maximum. These results can serve as benchmarks for comparison with ice sheet and climate model simulations.
格陵兰东南部赫尔海姆冰川的全新世历史
影响因子：
4
作者：
Bjørk A
通讯作者：
Bjørk A