Arctic glaciers and ice caps (GIC) are losing mass rapidly, and this process is expected to continue during the 21st century owing to polar amplification of climate warming. Here, we use seven years of CryoSat-2 swath interferometric altimetry to track changes in the volume of Arctic GIC. From these data, we produce a pan-Arctic assessment of GIC mass imbalance, and we partition their losses into signals associated with atmospheric processes and glacier dynamics. Between 2010 and 2017, Arctic GIC lost 609 ± 7 Gt of ice, contributing 0.240 ± 0.007 mm per year to global sea level rise. While surface ablation is responsible for 87% of losses across the Arctic, dynamic imbalance is increasing in the Barents and Kara Sea region where it now accounts for 43% of total ice loss. Arctic GIC's dynamic imbalance is associated with a northward shift of Atlantic climate, and this effect should be considered in global sea level projections.

北极冰川和冰盖（GIC）正在迅速消失，由于气候变暖的极度放大，预计这一过程将在21世纪持续下去。在这里，我们使用了7年的CryoSat-2测绘干涉测高法来跟踪北极GIC的体积变化。根据这些数据，我们对GIC质量失衡进行了北极评估，并将其损失分为与大气过程和冰川动力学相关的信号。在2010年至2017年之间，北极GIC损失了609±7 Gt冰，每年为全球海平面上升贡献了0.240±0.007 mm。尽管表面消融是整个北极地区87％损失的原因，但在Barents和Kara Sea地区，动态失衡现象正在加剧，目前该地区的失衡已占总冰量的43％。北极GIC'