Heavy Metal and Nutrient Concentrations in West Greenland Lakes (Summer 2023)

This dataset has been analyzed in a manuscript accepted to Science of the Total Environment titled: Glacially-fed lakes of West Greenland have elevated metal and nutrient concentrations and serve as regional repositories of these materials. This dataset provides information on heavy metal and nutrient concentrations in the water and sediment of four glacially-fed (GF) and four snow and groundwater-fed (SF) lakes near Kangerlussuaq, West Greenland during the summer of 2023. This data was used to investigate 1) the difference in nutrient and heavy metal concentrations between GF and SF lakes; 2) the ability of GF lakes to act as sinks of nutrients and heavy metals; and 3) the temporal trends in heavy metals in GF and SF lakes. The overall objective was to gain a better understanding of nutrient and heavy metal concentration in GF lakes and the role that GF lakes play in the movement and fate of these chemical elements in terms of the land to ocean aquatic continuum. The data showed that 1) GF lakes had higher concentrations of nutrients and most heavy metals in both the water and sediment compared to SF lakes; 2) GF lakes serve as sinks of nutrients and metals; and 3) mercury and lead have increased over time in SF lakes. Included below are five datasets of 1) nutrient and heavy metal concentrations in the surface water, 2) nutrient and heavy metal concentrations in sediment cores, 3) percent organic carbon from sediment cores, 4) delta-15 nitrogen (δ15N) from sediment cores, and 5) mercury concentrations in sediment cores from GF and SF lakes. A dataset with information on lake characteristics and coordinates is also included.

本数据集已被收录于一篇被《总环境科学（Science of the Total Environment）》接收的手稿，论文标题为：《格陵兰西部冰川补给型湖泊具有较高的金属与营养盐浓度，并作为此类物质的区域储库》。
本数据集提供了2023年夏季格陵兰西部康克鲁斯瓦格（Kangerlussuaq）周边4座冰川补给型（Glacially-fed, GF）湖泊与4座积雪、地下水补给型（Snow and groundwater-fed, SF）湖泊的水体及沉积物中重金属与营养盐浓度数据。
本数据被用于开展三项研究：1）冰川补给型与积雪、地下水补给型湖泊的营养盐及重金属浓度差异；2）冰川补给型湖泊作为营养盐与重金属汇的能力；3）冰川补给型与积雪、地下水补给型湖泊中重金属的时间变化趋势。
本研究的总体目标为更深入地认知冰川补给型湖泊中的营养盐与重金属浓度特征，以及此类湖泊在陆-海水生连续体框架下对这些化学元素的迁移与归趋所起到的作用。
研究结果表明：1）相较于积雪、地下水补给型湖泊，冰川补给型湖泊的水体与沉积物中营养盐及多数重金属浓度更高；2）冰川补给型湖泊可作为营养盐与重金属的储库；3）积雪、地下水补给型湖泊中的汞与铅浓度随时间呈上升趋势。
本数据集包含以下5类数据：1）表层水中的营养盐与重金属浓度数据；2）沉积物岩芯中的营养盐与重金属浓度数据；3）沉积物岩芯的有机碳百分含量数据；4）沉积物岩芯的δ¹⁵N（delta-15 nitrogen）数据；5）冰川补给型与积雪、地下水补给型湖泊沉积物岩芯中的汞浓度数据。
此外，本数据集还包含一份记录湖泊特征与坐标信息的数据集。