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美国城市供水系统中的同位素异质性反映了气候,环境和社会人口因素:对法医鉴定的影响

Chris Stantis^1,2, Alejandro Serna^2,3,4, Kirsten Verostick²

¹School of Anthropology, Political Science and Sociology, Southern Illinois University, Carbondale, Illinois, United States of America.

|November 11, 2024

概括

当地的饮用水同位素变化会影响法医地理位置的准确性. 许多美国城市的水源多样化,影响了来源的确定. 了解这种异质性是准确的法医分析的关键.

科学领域:

法医科学法医科学法医科学
地质化学地质化学
环境科学环境科学

背景情况:

人体组织中稳定的氧同位素反映了饮用水的组成.
水同位素的地理变化对于法医地理位置非常重要.
水同位素的局部变化可能会使原产地确定复杂化.

研究的目的:

调查美国发达地区的自来水稳定氧同位素变化的程度和模式.
确定影响饮用水局部同位素异质性的因素.
评估这种变异性对法医地理位置的影响.

主要方法:

分析了来自美国30个城市社区收集的自来水样本.
统计检查同位素变化 (δ18O十进制范围) 和分布模式.
与气候,环境和社会经济数据的相关性分析.

主要成果:

在个别发达地区观察到显著的同位素变化 (高达9‰).
多模态同位素分布是常见的,表明不同的水源.
变化在美国西部城市是最高的,与水资源异质性,供应较低和较大的发达地区相关.

结论:

当地自来水同位素异质是影响法医地理位置精度的系统因素.
了解水源多样性和同位素成分对于准确的法医调查至关重要.
地方变化的可预测性有助于完善法医地理定位方法.

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