Glaciers and ice caps of the Russian Arctic are currently experiencing accelerating mass loss as a result of strong atmospheric and oceanic warming in the Barents and Kara Sea (BKS) region. Since 2010, this loss has been driven by both increased surface ablation, and dramatic shifts in ice dynamics at individual drainage basins across the entire Eurasian High Arctic. Here, we provide a high-resolution spatial and temporal overview of ice surface elevation change and mass imbalance across both Novaya Zemlya and Severnaya Zemlya using CryoSat-2 interferometric swath altimetry from 2010 to 2018. We find a total mass imbalance of −300 kg m⁻² a⁻¹, marked by a strong east-to-west gradient, with higher rates of loss over Novaya Zemlya (9.7 ± 0.5 Gt a⁻¹ at 431 ± 22 kg m⁻² a⁻¹) in the west compared to Severnaya Zemlya (1.7 ± 0.1 Gt a⁻¹ at 97 ± 8 kg m⁻² a⁻¹) in the east. Correlation between time series of surface elevation change and climate forcing reveals a quasi-linear relationship between coupled ocean-atmospheric forcing and glacier change over Novaya Zemlya, in agreement with similar findings from east Greenland. We further discern the likely role of ocean warming as the key factor driving dynamic ice loss in Severnaya Zemlya, owing to increasingly warm Atlantic Waters circulating along the Eurasian continental margin. We conclude that simple, linear relationships between environmental forcing and glacier change may be sufficiently accurate to parametrize ice loss in regions where synchronous, coupled ocean-atmosphere forcing prevails.

中文翻译：

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为应对大气变暖、海冰减少和欧亚北极大陆架海的大西洋化，俄罗斯北极地区的冰质量损失加速

由于巴伦支海和喀拉海 (BKS) 地区强烈的大气和海洋变暖，俄罗斯北极的冰川和冰盖目前正在加速质量损失。自 2010 年以来，这种损失是由表面消融增加和整个欧亚北极地区各个流域的冰动态发生巨大变化所造成的。在这里，我们提供了 2010 年至 2018 年期间使用 CryoSat-2 干涉测量条带高度测量的新地岛和北地岛冰面海拔变化和质量不平衡的高分辨率空间和时间概览。我们发现总质量不平衡为 -300 kg m ⁻²  a ⁻¹，以强烈的东西向梯度为标志，在新地岛 (Novaya Zemlya) (9.7 ± 0.5 Gt a ⁻¹在 431 ± 22 kg m ^-2  a ^-1 ) 与 Severnaya Zemlya (1.7 ± 0.1 Gt a ^-1 at 97 ± 8 kg m ^-2  a ^{-1 ) 相比}） 在东方。地表海拔变化时间序列与气候强迫之间的相关性揭示了耦合的海洋-大气强迫与新地岛冰川变化之间的准线性关系，这与格陵兰东部的类似发现一致。由于沿欧亚大陆边缘循环的大西洋水域越来越温暖，我们进一步认识到海洋变暖可能是推动 Severnaya Zemlya 动态冰损失的关键因素。我们得出的结论是，环境强迫和冰川变化之间简单的线性关系可能足以准确地对同步、耦合的海洋-大气强迫盛行的地区的冰损失进行参数化。