Quantifying erosion rates and weathering pathways that maximize soil organic carbon storage
Quantifying erosion rates and weathering pathways that maximize soil organic carbon storage
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量化侵蚀率和风化途径，最大限度地提高土壤有机碳储存量
DOI：
10.1007/s10533-023-01054-7
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发表时间：
2023
期刊：
影响因子：
4
通讯作者：
Jellinek, A. Mark
中科院分区：
文献类型：
--
作者：
Roering, Joshua J.;Hunter, Brooke D.;Ferrier, Ken L.;Chadwick, Oliver A.;Yoo, Kyungsoo;Wackett, Adrian A.;Almond, Peter C.;Silva, Lucas;Jellinek, A. Mark
通过基岩风化和大气沉降进入土壤的原生矿物质可以生成优先与土壤有机碳（SOC）结合的不良结晶矿物质（PCM）。这些关联阻碍了微生物分解和二氧化碳从土壤释放到大气中，使其成为陆地碳丰度和持久性的关键地球化学控制因素。 Studies that explore these relationships are typically derived from soil chronosequences that experience negligible erosion and thus do not readily translate to eroding landscapes.在这里，我们提出了一个理论框架，通过耦合地球化学和地貌质量平衡方程来估计丘陵和山区的稳态相变材料密度和库存，这些方程解释了基岩和灰尘产生的土壤、土壤侵蚀、风化造成的相变材料形成以及相变材料向结晶相的转变。我们计算了最大 PCM 丰度的最佳侵蚀率，这是因为 PCM 在较快的侵蚀率下受到风化不足的限制，并且在较慢的侵蚀率下通过“成熟”成更多的结晶形式而损失。模拟山顶土壤的最佳侵蚀速率由控制初级矿物风化和 PCM 成熟效率的反应速率常数调节。通过将我们的分析与宇宙源核素衍生的侵蚀和土壤生产率的全球汇编进行比较，我们表明，具有缓慢至中度侵蚀率的景观可能是蕴藏丰富的相变材料库的最佳选择，这些相变材料库可以促进有机碳固存并限制周转。鉴于侵蚀地形指标不断增加以及高分辨率地形数据的广泛可用性，我们的框架展示了如何将风化和关键区域过程耦合起来，为在广泛的空间和时间尺度上持久的 SOC 存储潜力提供景观优先级。
Primary minerals that enter soils through bedrock weathering and atmospheric deposition can generate poorly crystalline minerals (PCM) that preferentially associate with soil organic carbon (SOC). These associations hinder microbial decomposition and the release of CO2from soils to the atmosphere, making them a critical geochemical control on terrestrial carbon abundance and persistence. Studies that explore these relationships are typically derived from soil chronosequences that experience negligible erosion and thus do not readily translate to eroding landscapes. Here, we propose a theoretical framework to estimate steady-state PCM density and stocks for hilly and mountainous settings by coupling geochemical and geomorphic mass balance equations that account for soil production from bedrock and dust, soil erosion, PCM formation from weathering, and the transformation of PCMs into crystalline phases. We calculate an optimal erosion rate for maximum PCM abundance that arises because PCMs are limited by insufficient weathering at faster erosion rates and loss via “ripening” into more crystalline forms at slower erosion rates. The optimal erosion rate for modeled hilltop soil is modulated by reaction rate constants that govern the efficiency of primary mineral weathering and PCM ripening. By comparing our analysis with global compilations of erosion and soil production rates derived from cosmogenic nuclides, we show that landscapes with slow-to-moderate erosion rates may be optimal for harboring abundant PCM stocks that can facilitate SOC sequestration and limit turnover. Given the growing array of erosion-topography metrics and the widespread availability of high-resolution topographic data, our framework demonstrates how weathering and critical zone processes can be coupled to inform landscape prioritization for persistent SOC storage potential across a broad range of spatial and temporal scales.
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影响因子：
3.9
作者：
Almond, Peter;Roering, Josh;Hales, T. C.
通讯作者：
Hales, T. C.
影响因子：
6.1
作者：
Brooke D. Hunter;J. Roering;P. Almond;O. Chadwick;M. Polizzotto;Lucas C. R. Silva
通讯作者：
Brooke D. Hunter;J. Roering;P. Almond;O. Chadwick;M. Polizzotto;Lucas C. R. Silva
土壤侵蚀是否会恢复土壤磷库存？
影响因子：
6.1
作者：
A. Eger;K. Yoo;P. Almond;G. Boitt;I. Larsen;L. Condron;Xiang Wang;S. Mudd
通讯作者：
S. Mudd
影响因子：
3.9
作者：
Katherine E. Grant;V. Galy;N. Haghipour;T. Eglinton;L. Derry
通讯作者：
Katherine E. Grant;V. Galy;N. Haghipour;T. Eglinton;L. Derry
影响因子：
3.9
作者：
Furbish, David Jon;Roering, Joshua J.;Doane, Tyler H.
通讯作者：
Doane, Tyler H.