MOE Key Laboratory of Western China's Environmental System, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China.
MOE Key Laboratory of Western China's Environmental System, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China.
J Hazard Mater. 2023 Apr 15;448:130972. doi: 10.1016/j.jhazmat.2023.130972. Epub 2023 Feb 8.
Anthropogenic emissions have resulted in increases in the atmospheric fluxes of both nutrient and toxic elements. However, the long-term geochemical impacts on lake sediments of deposition activities have not been clearly clarified. We selected two small enclosed lakes in northern China-Gonghai, strongly influenced by anthropogenic activities, and Yueliang lake, relatively weakly influenced by anthropogenic activities-to reconstruct historical trends of atmospheric deposition on the geochemistry of the recent sediments. The results showed an abrupt rise in the nutrient levels in Gonghai and the enrichment of toxic metal elements from 1950 (the Anthropocene) onwards. While, at Yueliang lake, the rise on TN was from 1990 onwards. These consequences are attributable to the aggravation of anthropogenic atmospheric deposition in N, P and toxic metals, from fertilizer consumption, mining and coal combustion. The intensity of anthropogenic deposition is considerable, which leave a significant stratigraphic signal of the Anthropocene in lake sediments.
人为排放导致大气中营养元素和有毒元素通量增加。然而，沉积活动对湖泊沉积物的长期地球化学影响尚未得到明确阐明。我们选择了中国北方的两个小型封闭湖泊—— Gonghai，受人为活动强烈影响，以及相对受人为活动影响较弱的月牙湖——来重建大气沉积对近代沉积物地球化学的历史趋势。结果表明，自 1950 年（人类世）以来，Gonghai 的营养水平急剧上升，有毒金属元素富集。而在月牙湖中，TN 的上升则始于 1990 年。这些后果归因于化肥消费、采矿和煤炭燃烧等人为活动导致大气中 N、P 和有毒金属的沉积加剧。人为沉积的强度相当大，在湖泊沉积物中留下了人类世的显著地层信号。
