Geochemical evolution of the Critical Zone across variable time scales informs concentration‐discharge relationships: Jemez River Basin Critical Zone Observatory
Geochemical evolution of the Critical Zone across variable time scales informs concentration‐discharge relationships: Jemez River Basin Critical Zone Observatory
复制标题
不同时间尺度上关键区的地球化学演化揭示了浓度-流量关系：杰梅兹河流域关键区观测站
DOI：
--
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
J. Chorover
中科院分区：
文献类型：
--
作者：
J. McIntosh;Courtney Schaumberg;J. Perdrial;A. Harpold;Angélica Vázquez;C. Rasmussen;D. Vinson;Xavier E. Zapata;P. Brooks;T. Meixner;J. Pelletier;L. Derry;J. Chorover
本文研究了水、碳和能量通量对通过Jemez临界区(CZ)的溶质生产和传输的影响，以及在不同的时空尺度上对C-Q关系的影响。土壤的化学贫化-富集剖面，结合风化层厚度和地下水数据，表明在这一高度裂隙的年轻火山地带，在深部基岩风化过程中硅酸盐矿物的不一致溶解对水系水化学的重要性，这主要受水通量的限制。在高流动条件下(例如，春季融雪)，土壤和风化层表面的湿润以及有机酸的存在促进了矿物的溶解，并为土壤水和地下水提供了持续的盐基阳离子、硅和DIC。在“湿”期间，来自不同水化学储集层的水在近流环境中的混合导致了DIC、盐基阳离子和硅在水流中的化学稳定行为。在土壤饱和和与河流的横向连通性期间，有机质络合(即Ge、Al)和/或胶体(即Al)迁移的金属与Q呈正相关。在除最高流动条件外的所有条件下，可变的Si-Q关系可以用粘土矿物的非保守迁移和沉淀来解释，这影响了长期和短期的硅风化通量。通过结合在不同空间和时间尺度上获得的CZ的测量结果，我们能够约束不同水文水库的风化过程，这些过程可能在水文事件期间被冲到溪流中，从而提供C-Q关系。
This study investigates the influence of water, carbon, and energy fluxes on solute production and transport through the Jemez Critical Zone (CZ) and impacts on C‐Q relationships over variable spatial and temporal scales. Chemical depletion‐enrichment profiles of soils, combined with regolith thickness and groundwater data indicate the importance to stream hydrochemistry of incongruent dissolution of silicate minerals during deep bedrock weathering, which is primarily limited by water fluxes, in this highly fractured, young volcanic terrain. Under high flow conditions (e.g., spring snowmelt), wetting of soil and regolith surfaces and presence of organic acids promote mineral dissolution and provide a constant supply of base cations, Si, and DIC to soil water and groundwater. Mixing of waters from different hydrochemical reservoirs in the near stream environment during “wet” periods leads to the chemostatic behavior of DIC, base cations, and Si in stream flow. Metals transported by organic matter complexation (i.e., Ge, Al) and/or colloids (i.e., Al) during periods of soil saturation and lateral connectivity to the stream display a positive relationship with Q. Variable Si‐Q relationships, under all but the highest flow conditions, can be explained by nonconservative transport and precipitation of clay minerals, which influences long versus short‐term Si weathering fluxes. By combining measurements of the CZ obtained across different spatial and temporal scales, we were able to constrain weathering processes in different hydrological reservoirs that may be flushed to the stream during hydrologic events, thereby informing C‐Q relationships.
影响因子：
3.9
作者：
David Huckle;Lin Ma;J. McIntosh;Angélica Vázquez-Ortega;C. Rasmussen;J. Chorover
通讯作者：
David Huckle;Lin Ma;J. McIntosh;Angélica Vázquez-Ortega;C. Rasmussen;J. Chorover
预测未来的关键区域
DOI：
10.12952/journal.elementa.000019
发表时间：
2013
期刊：
Elementa: Science of the Anthropocene
影响因子：
--
作者：
Goddéris, Yves;Brantley, Susan L
通讯作者：
Brantley, Susan L
影响因子：
5
作者：
Hyojin Kim;J. Bishop;W. Dietrich;I. Fung
通讯作者：
Hyojin Kim;J. Bishop;W. Dietrich;I. Fung