在高北极前冰期沉积物中记录的遗留的和降下物放射性核酸
Yulu Xue1, Yaguang Nie2, Liqiang Xu3
1Anhui Province Key Laboratory of Polar Environment and Global Change, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, 230026, China.
Environmental pollution (Barking, Essex : 1987)
|June 8, 2025
概括
全球变暖可能会从冰川中释放遗留污染物. 这项研究在北极冰川沉积物中发现了大量的丰富,这表明融化冰和冷岩的潜在风险.
科学领域:
- 环境科学 环境科学
- 冰川学的冰川学
- 地质化学 地质化学
背景情况:
- 冰川储存了全球变暖期间释放的遗留污染物.
- 这些污染物对环境的命运和二次释放的理解甚微.
- 前冰期环境是污染物重新调动的关键区域.
研究的目的:
- 研究冰川退缩期间污染物的潜在迁移.
- 在高北极冰川沉积物核心中分析放射性核素, (Pb) 同位素和化学参数.
- 评估前冰期环境中的来源和缩情况.
主要方法:
- 斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯
- 测量放射性核化物 (210Pb, 137Cs), (Pb) 和其同位素,TOC和TN.
- 贝叶斯的Pb同位素混合模型的应用.
主要成果:
- 在特定的沉积物单元中观察到的TOC,TN,210Pb,137Cs和Pb的同时丰富,受冷矿的影响.
- 显著的Pb丰富,特别是在受冷矿影响的沉积物中,这表明来自冰川的遗留Pb重新调动.
- 贝叶斯模型表明,大气中远程传输 (41.8%) 和冷矿 (9.7%) 是主要的Pb来源.
结论:
- 前冰期沉积物充当了冰川融化释放的遗留污染物的档案.
- 冰矿在冰川前陆地内集和潜在地重新分配中发挥着重要作用.
- 增加对前冰期环境的关注对于评估与冰川撤退和污染物释放相关的风险至关重要.
关键词:
冰冷矿石 (Cryoconite) 是一种冰冷矿石.冰川的撤退 冰川的撤退Pb是同位素的同位素之一.进冰期沉积物的沉积物放射性核化物 放射性核化物斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德更多相关视频
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