中国科学院地理科学与资源研究所高扬团队近日研究了近30年来中国内陆水域溶解碳储量和通量动态。相关论文发表在2025年6月4日出版的《国家科学评论》杂志上。

内陆水域（湖泊、水库和河流）是全球气候变化和碳循环的重要调节器。中国的内陆水系对区域C预算进行了重大监管。然而，我们对内陆水域溶解碳（DC）储存和通量的长期时空模式和潜在机制的理解仍然有限。研究组考察了湖泊和水库直流储能和河流直流通量，量化了过去三十年中国的变化。结果发现，中国内陆水直流储量从20世纪90年代的96 Tg C增加到2010年代的142 Tg C，而直流河流流量没有显著变化（13.2±0.4 Tg C/yr）。 

研究结果还表明，气候变化、人为干扰和水化学共同推动了内陆水直流动态。河流DC更直接地受到气候和人为因素的驱动（>50%），而湖泊和水库更直接地受水化学的影响（>70%）。此外，气候因素可以通过水化学因素（即电导率（EC）和pH值）解释溶解无机碳（DIC）浓度的变化，而气候和营养状况通常可以解释DOC浓度的变化。该研究强调了内陆水在全球碳平衡中的重要作用，并强调了在未来的碳预算中考虑内陆水的必要性。

附：英文原文

Title: Dissolved carbon storage and flux dynamics in China's inland waters over the past 30 years

Author: Wang, Shuoyue, Benoit, Gaboury, Raymond, Peter A, Yu, Guirui, Zhou, Feng, Liu, Shaoda, Miao, Chiyuan, Sun, Kun, Li, Zhaoxi, Jia, Junjie, Gao, Yang

Issue&Volume: 2025-06-02

Abstract: Inland waters (lakes, reservoirs, and rivers) serve as important regulators of global climate change and carbon (C) cycling. China's inland water systems significantly regulate regional C budgets. However, our understanding of the long-term spatiotemporal patterns and underlying mechanisms of dissolved carbon (DC) storages and fluxes in inland waters remains limited. This study examined lake and reservoir DC storage and river DC flux, quantifying their changes in China over the past three decades. We found that inland water DC stocks in China increased from 96 Tg C in the 1990s to 142 Tg C in the 2010s while DC river flux did not significantly change (13.2 ± 0.4 Tg C/yr). Findings also showed that a combination of climate change, anthropogenic disturbance, and water chemistry collectively drove inland water DC dynamics. River DC was more directly driven by climate and anthropogenic factors (>50%) while lakes and reservoirs were more directly influenced by water chemistry (>70%). Additionally, climate factors can explain changes in dissolved inorganic carbon (DIC) concentrations via water chemistry factors (i.e., electrical conductivity (EC) and pH), while, collectively, climate and the nutrient status can typically explain changes in DOC concentrations. This study emphasizes the important role that inland water plays in the global C balance and underscores the necessity of considering it in future C budgets.

DOI: 10.1093/nsr/nwaf229

Source: https://academic.oup.com/nsr/advance-article/doi/10.1093/nsr/nwaf229/8155232searchresult=1