We present a high-resolution record of Late Glacial and Early Holocene mercury (Hg) accumulation within the sediments of Laguna de Los Anteojos, a small headwater alpine lake in Venezuela. Our sediment core spans the Older Dryas (OD) and Younger Dryas (YD) climate reversals, providing new insight into the effects of abrupt climatic transitions on atmospheric Hg deposition. Sediment Hg concentrations and accumulation rates (fluxes) increased sharply after regional deglaciation and then peaked immediately prior to onset of both the OD and YD. Mercury concentrations and fluxes then decreased through cold OD and YD conditions. Both Hg concentrations and fluxes increased rapidly with warming, rising two-fold in about 100 years after the OD and nearly four-fold in about 500 years during the latter-half of the YD. This lake-sediment record of Hg dynamics during the Glacial–Holocene transition suggests atmospheric Hg cycling is affected by abrupt climate change. Graphical abstract

中文翻译：

---

气候变化对委内瑞拉安第斯山脉老仙女木和新仙女木期间汞沉积的影响

我们提供了晚冰期和早全新世汞 (Hg) 在委内瑞拉小湖源头湖 Laguna de Los Anteojos 沉积物中积累的高分辨率记录。我们的沉积物核心跨越了旧仙女木 (OD) 和新仙女木 (YD) 气候逆转，为突然气候转变对大气汞沉积的影响提供了新的见解。沉积物汞浓度和积累率（通量）在区域冰川消退后急剧增加，然后在 OD 和 YD 开始前立即达到峰值。然后通过冷 OD 和 YD 条件降低汞浓度和通量。Hg 浓度和通量都随着变暖而迅速增加，在 OD 后约 100 年增加了两倍，在 YD 后半期约 500 年增加了近四倍。冰川 - 全新世过渡期间汞动态的湖泊沉积物记录表明大气汞循环受到突然气候变化的影响。图形概要