Marine-terminating glaciers on the Antarctic Peninsula (AP) have retreated, accelerated and thinned in response to climate change in recent decades. Ocean warming has been implicated as a trigger for these changes in glacier dynamics, yet little data exist near glacier termini to assess the role of ocean warming here. We use remotely-sensed iceberg melt rates seaward of two glaciers on the eastern and six glaciers on the western AP from 2013 to 2019 to explore connections between variations in ocean conditions and glacier frontal ablation. We find iceberg melt rates follow regional ocean temperature variations, with the highest melt rates (mean ≈ 10 cm d−1) at Cadman and Widdowson glaciers in the west and the lowest melt rates (mean ≈ 0.5 cm d−1) at Crane Glacier in the east. Near-coincident glacier frontal ablation rates from 2014 to 2018 vary from ~450 m a−1 at Edgeworth and Blanchard glaciers to ~3000 m a−1 at Seller Glacier, former Wordie Ice Shelf tributary. Variations in iceberg melt rates and glacier frontal ablation rates are significantly positively correlated around the AP (Spearman's ρ = 0.71, p-value = 0.003). We interpret this correlation as support for previous research suggesting submarine melting of glacier termini exerts control on glacier frontal dynamics around the AP.

中文翻译：

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南极半岛冰川正面消融率与冰山融化推断海洋条件变化的分析

近几十年来，为了应对气候变化，南极半岛 (AP) 上终止海洋的冰川已经退缩、加速和变薄。海洋变暖被认为是这些冰川动力学变化的触发因素，但在冰川终点附近几乎没有数据来评估这里海洋变暖的作用。我们使用 2013 年至 2019 年东部两座冰川和西部六座冰川的遥感冰山融化速率来探索海洋条件变化与冰川正面消融之间的联系。我们发现冰山融化率跟随区域海洋温度变化，融化率最高（平均≈10 cm d-1) 在西部的 Cadman 和 Widdowson 冰川和最低的融化速度（平均 ≈ 0.5 cm d-1) 在东部的克兰冰川。从 2014 年到 2018 年，近乎同步的冰川正面消融率在 ~450 ma 之间变化-1在御剑和布兰查德冰川到 ~3000 ma-1在卖方冰川，前 Wordie 冰架支流。冰山融化速率和冰川正面消融速率的变化在 AP 周围呈显着正相关（Spearman'sρ= 0.71,p-值 = 0.003)。我们将这种相关性解释为对先前研究的支持，该研究表明冰川末端的海底融化控制了 AP 周围的冰川正面动态。