河流溶解无机碳稳定碳同位素示踪技术及其在中国河流碳循环研究中的应用
Stable isotopic tracing techniques on riverine dissolved inorganic carbon and applications in the study of carbon cycle in Chinese rivers
投稿时间:2024-04-22  修订日期:2024-05-08
DOI:
中文关键词:河流溶解无机碳  稳定碳同位素  流域过程  人类活动  中国河流
英文关键词:riverine dissolved inorganic carbon  stable carbon isotope  watershed processes  human activities  rivers in China
基金项目:国家重点研发计划项目(2020YFA0607700), 国家自然科学(41877402)和中国科学院青年创新促进会联合资助。
作者单位E-mail
武恩鹏 中国科学院地质与地球物理研究所 wsymiemie@163.com 
孙会国* 中国科学院地质与地球物理研究所 shg@mail.iggcas.ac.cn 
刘文景 中国科学院地质与地球物理研究所 liuwenjing@mail.iggcas.ac.cn 
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中文摘要:
      河流溶解无机碳(DIC)是全球碳循环中的重要组成部分。河流DIC的稳定碳同位素(δ13CDIC)已被广泛用于辨识流域内碳的来源和迁移转化过程。本研究综合现有文献,系统梳理了河流δ13CDIC的影响因素和变化机理,论证了该指标能够忠实、敏感反映流域环境特征及各种地表过程,可用于重建流域碳循环体系中的生物地球化学过程。由于河流碳来源及迁移转化过程的复杂性,关于河流δ13CDIC的影响机理仍有较多细节尚未探明。通过收集和分析我国主要河流的δ13CDIC数据发现,在全国尺度上我国河流δ13CDIC呈现出“西高东低”的变化格局,基本反映了我国地质、气候及生态环境的空间分布特征。青藏高原地区河流δ13CDIC值整体上比起其地区明显偏高,关于这一现象的形成机制还有待进一步研究。最后,我们对未来研究工作应重点关注的内容提出建议,以期进一步完善和提升河流DIC同位素示踪理论及其在揭示碳循环过程和机理方面中的应用。
英文摘要:
      Dissolved inorganic carbon (DIC) in rivers is a main component of the global carbon cycle. The stable carbon isotope of riverine DIC (δ13CDIC) has been extensively used to identify sources, transport and transformation processes of carbon in river basins. This study synthesizes existing research to investigate the factors and mechanisms that influence the δ13CDIC value, demonstrating its potential as an indicator that can sensitively reflect watershed environmental characteristics and various surface processes. Due to the complexity of riverine carbon sources and processes, many aspects regarding the influence mechanisms of riverine δ13CDIC remain unclear. We have collected the reported δ13CDIC data from major Chinese rivers, revealing a spatial pattern of "high in the west and low in the east", which essentially reflects the spatial distribution characteristics of geology, climate, and ecological environments in China. The δ13CDIC values observed in rivers draining the Tibetan Plateau are markedly higher compared to those in other regions. The underlying mechanism for this discrepancy requires further investigation. We also propose suggestions for future studies, aiming to refine the DIC isotope tracing theory and its application in elucidating carbon cycling processes and mechanisms.
武恩鹏,孙会国,刘文景.2024.河流溶解无机碳稳定碳同位素示踪技术及其在中国河流碳循环研究中的应用[J].水生态学杂志,45(4):9-18.
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