Western Ireland lies at the Atlantic fringe of Europe and is thus well positioned to record changes in climate linked to North Atlantic circulation. Lake‐sediment oxygen and carbon isotopes are sensitive to changes in the atmosphere, the lake catchment and the lake itself, and thus are valuable proxies for long‐term environmental change. Here we present Younger Dryas and Holocene stable‐isotope records from endogenic and biogenic carbonates from An Loch Mór, a karstic lake on Inis Oírr, Aran Islands, western Ireland. The bulk carbonate and ostracod‐derived stable‐isotope records are a complex response to regional climatic and local factors. Low oxygen‐isotope and high carbon‐isotope values in the Younger Dryas most likely reflect low air temperatures and dominance of bedrock‐derived carbon from the poorly vegetated catchment, but input of detrital carbonate cannot be ruled out. Holocene variations in oxygen‐isotope values are likely a response mainly to changes in the isotopic composition of rainfall, evaporative enrichment of lake water and, during the past millennium, incursion of seawater as a result of regional sea‐level rise. A reduction in carbon‐isotope values at the Younger Dryas/Early Holocene transition reflects increased input of soil‐derived carbon to the lake, modified by changes in aquatic productivity. During the past millennium a shift to less negative values is attributed mainly to increasing saline influence. Broad similarities with stable‐isotope records from other sites in western Ireland suggest regional climatic controls dominated by North Atlantic atmospheric circulation patterns, although abrupt events, that were possibly unique to An Loch Mór, point to local factors also being important.

中文翻译：

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来自西爱尔兰的湖泊沉积物稳定同位素记录表明，欧洲大西洋边缘的年轻的树蛙和全新世环境变化

西爱尔兰位于欧洲的大西洋边缘，因此可以很好地记录与北大西洋环流有关的气候变化。湖泊沉积物中的氧和碳同位素对大气，湖泊流域和湖泊本身的变化敏感，因此是长期环境变化的重要代表。在这里，我们介绍了来自西爱尔兰阿兰群岛伊尼斯·厄尔（InisOírr）岩溶湖An LochMór的内源性碳酸盐和生物源性碳酸盐的年轻得里亚树和全新世稳定同位素记录。大量的碳酸盐和源自兽类的稳定同位素记录是对区域气候和当地因素的复杂反应。在低矮树丛中低氧同位素和高碳同位素值很可能反映了低气温和植被差的集水区基岩衍生碳的优势，但是不能排除碎屑碳酸盐的输入。氧同位素值的全新世变化可能主要是由于降雨的同位素组成的变化，湖水的蒸发富集以及在过去的千年中区域性海平面上升导致的海水入侵。较年轻的树名/新世早期过渡期碳同位素值的降低反映了土壤中碳向湖泊的输入增加，并受到水生生产力变化的影响。在过去的千年中，负值的减少主要归因于盐水影响的增加。与爱尔兰西部其他地点的稳定同位素记录的广泛相似之处表明，区域性气候控制主要由北大西洋的大气环流模式决定，尽管是突发事件，这可能是An LochMór所独有的，