Debris-covered glaciers constitute a large part of the world's cryosphere. However, little is known about their long-term response to multi-millennial climate variability, in particular in the Southern Hemisphere. Here, we provide first insights into the response of a debris-covered glacier to multi-millennial climate variability in the sub-Antarctic Kerguelen Archipelago, which can be compared to that of recently investigated debris-free glaciers. We focus on the Gentil Glacier and present 13 new 36Cl cosmic-ray exposure ages from moraine boulders. The Gentil Glacier experienced at least two glacial advances: the first one during the Late Glacial (19.0–11.6 ka) at ~14.3 ka and the second one during the Late Holocene at ~2.6 ka. Both debris-covered and debris-free glaciers advanced broadly synchronously during the Late Glacial, most probably during the Antarctic Cold Reversal event (14.5–12.9 ka). This suggests that both glacier types at Kerguelen were sensitive to abrupt temperature changes recorded in Antarctic ice cores, associated with increased moisture. However, during the Late Holocene, the advance at ~2.6 ka was not observed in other glaciers and seems to be an original feature of the debris-covered Gentil Glacier, related to either distinct dynamics or to distinct sensitivity to precipitation changes.

中文翻译：

---

在过去的 15 000 年里，位于 Kerguelen（49°S，69°E）的被碎片覆盖的冰川

被碎片覆盖的冰川构成了世界冰冻圈的很大一部分。然而，人们对它们对千年气候变化的长期反应知之甚少，特别是在南半球。在这里，我们提供了关于亚南极 Kerguelen 群岛中被碎片覆盖的冰川对千年气候变化的响应的初步见解，这可以与最近调查的无碎片冰川进行比较。我们专注于让蒂尔冰川并呈现 13 个新的36冰碛巨石的 Cl 宇宙射线暴露年龄。让蒂尔冰川至少经历了两次冰川进展：第一次是在晚冰期（19.0-11.6 ka），约为 14.3 ka，第二次是在晚全新世，约为 2.6 ka。在晚冰期，最有可能在南极冷反转事件（14.5-12.9 ka）期间，被碎片覆盖的冰川和无碎片冰川大致同步推进。这表明 Kerguelen 的两种冰川类型都对南极冰芯中记录的温度突然变化敏感，这与水分增加有关。然而，在晚全新世期间，在其他冰川中没有观察到约 2.6 ka 的进展，这似乎是碎片覆盖的让蒂尔冰川的原始特征，与不同的动力学或对降水变化的不同敏感性有关。