Replication data for: Holocene sediments from a coastal lake on northern Devon Island, Nunavut, Canada

Abstract: Sediment cores from Lake DV09, northern Devon Island, Nunavut, Canada (75°34”N, 89°18’55”W), were studied to reconstruct the lake ontogeny through analysis and interpretation of the sediment stratigraphy. The lake was uplifted from marine inundation _7600 cal BP. After a millennium of rapid sediment accumulation, which coincided with the Holocene Thermal Maximum in the region, accumulation rates decreased over the past 6000 years as the Arctic became colder. This resulted in the deposition of very fine laminae that were interpreted as varves. The uppermost laminated sediments provided a ~1600 year history of annual sediment transport and deposition into the lake. During periods of warmer temperatures, such as between 6000 and 7500 cal BP and during the Medieval Climate Anomaly (~950–1300 CE; CE, Christian Era), hydroclimatic and permafrost slope processes increased sedimentation rates into the basin.

摘要：本研究对加拿大努纳武特地区德文岛北部DV09湖（75°34′N，89°18′55″W）的沉积物岩芯开展分析，通过沉积物地层学的解析与阐释，重建该湖的演化历程。该湖于距今约7600个校正碳年（cal BP）时因抬升脱离海洋淹没环境。在经历了与区域全新世大暖期（Holocene Thermal Maximum）同步的千年快速沉积阶段后，随着北极地区气候逐渐变冷，过去6000年间的沉积速率持续降低。这一过程形成了极细的纹层，后被鉴定为季候泥（varves）。最顶部的纹层状沉积物记录了该湖近1600年的年度沉积物搬运与沉积历史。在温度偏高的时期，例如距今6000至7500个校正碳年以及中世纪暖期（Medieval Climate Anomaly，约公元950–1300年；CE即基督纪元（Christian Era）），水文气候与冻土斜坡过程加剧了湖盆内的沉积速率。