Climate forcing controls on carbon terrestrial fluxes during shale weathering

生物地球化学循环 风化作用 环境科学 碳循环 生物地球化学 风化土 土壤科学 大气科学 地球科学 水文学(农业) 地质学 环境化学 生态系统 化学 地貌学 生态学 生物 物理 岩土工程 天体生物学
作者
Lucien Stolze,Bhavna Arora,Dipankar Dwivedi,Carl I. Steefel,Toshiyuki Bandai,Yuxin Wu,Peter Nico
出处
期刊:Proceedings of the National Academy of Sciences of the United States of America [National Academy of Sciences]
卷期号:121 (27)
标识
DOI:10.1073/pnas.2400230121
摘要

Climate influences near-surface biogeochemical processes and thereby determines the partitioning of carbon dioxide (CO 2 ) in shale, and yet the controls on carbon (C) weathering fluxes remain poorly constrained. Using a dataset that characterizes biogeochemical responses to climate forcing in shale regolith, we implement a numerical model that describes the effects of water infiltration events, gas exchange, and temperature fluctuations on soil respiration and mineral weathering at a seasonal timescale. Our modeling approach allows us to quantitatively disentangle the controls of transient climate forcing and biogeochemical mechanisms on C partitioning. We find that ~3% of soil CO 2 (1.02 mol C/m 2 /y) is exported to the subsurface during large infiltration events. Here, net atmospheric CO 2 drawdown primarily occurs during spring snowmelt, governs the aqueous C exports (61%), and exceeds the CO 2 flux generated by pyrite and petrogenic organic matter oxidation (~0.2 mol C/m 2 /y). We show that shale CO 2 consumption results from the temporal coupling between soil microbial respiration and carbonate weathering. This coupling is driven by the impacts of hydrologic fluctuations on fresh organic matter availability and CO 2 transport to the weathering front. Diffusion-limited transport of gases under transient hydrological conditions exerts an important control on CO 2(g) egress patterns and thus must be considered when inferring soil CO 2 drawdown from the gas phase composition. Our findings emphasize the importance of seasonal climate forcing in shaping the net contribution of shale weathering to terrestrial C fluxes and suggest that warmer conditions could reduce the potential for shale weathering to act as a CO 2 sink.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
刚刚
1秒前
2秒前
小二郎应助房山季鸟猴采纳,获得10
2秒前
3秒前
can完成签到,获得积分10
3秒前
zhongzihao完成签到,获得积分20
4秒前
小蘑菇应助MaYue采纳,获得10
4秒前
4秒前
孙福禄应助机智的然然采纳,获得10
4秒前
GooJohn发布了新的文献求助10
5秒前
NexusExplorer应助杜兰特工队采纳,获得10
6秒前
6秒前
6秒前
7秒前
FashionBoy应助鲤跃采纳,获得10
8秒前
阳光c完成签到 ,获得积分10
8秒前
威武的手链完成签到,获得积分20
9秒前
sxr完成签到,获得积分10
9秒前
zhongzihao发布了新的文献求助10
10秒前
10秒前
在水一方应助闪闪采纳,获得10
10秒前
Jay发布了新的文献求助10
11秒前
灰灰子发布了新的文献求助10
11秒前
量子星尘发布了新的文献求助10
12秒前
12秒前
小丑鱼儿发布了新的文献求助10
14秒前
XYN1发布了新的文献求助10
14秒前
17秒前
17秒前
LiuLiu完成签到,获得积分10
18秒前
樱桃小热巴完成签到 ,获得积分10
18秒前
19秒前
19秒前
不低头完成签到,获得积分10
19秒前
大鱼完成签到,获得积分10
20秒前
20秒前
XYN1完成签到,获得积分10
20秒前
MaYue发布了新的文献求助10
21秒前
21秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
‘Unruly’ Children: Historical Fieldnotes and Learning Morality in a Taiwan Village (New Departures in Anthropology) 400
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3988868
求助须知:如何正确求助?哪些是违规求助? 3531255
关于积分的说明 11253071
捐赠科研通 3269858
什么是DOI,文献DOI怎么找? 1804822
邀请新用户注册赠送积分活动 881994
科研通“疑难数据库(出版商)”最低求助积分说明 809035