GSTDTAP  > 气候变化
DOI10.1029/2021GL092916
Coevolution of weathering front and water table
Wei Wang; Po Chen; Ken Dueker; Ye Zhang; En-jui Lee; Dawei Mu; Ian Keifer; Jianying Jiao
2021-10-11
发表期刊Geophysical Research Letters
出版年2021
英文摘要

Water is known to play an essential role in initiating and maintaining subsurface weathering reactions. However, the interaction between the weathering front and the water table is unclear and under intense debate. Here we present a high-fidelity, 3D image of a variably saturated weathering front beneath a granite terrain in the Laramie Range, Wyoming constructed using full-3D ambient-noise adjoint tomography and calibrated with data from an extensive drilling and hydraulic well testing effort. The imaged weathering front between saprolite and weathered bedrock is overall shallower than the water table under ridge, but deeper than water table under valleys. We propose that downward-advancing weathering front co-evolves with water table in a positive cycle that gradually flattens the water table, enhances the rate of groundwater drainage, and exposes underlying bedrock to weathering. As a result, we expect this cycle to become “sluggish” with time as water table gradient decreases.

领域气候变化
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/340106
专题气候变化
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GB/T 7714
Wei Wang,Po Chen,Ken Dueker,et al. Coevolution of weathering front and water table[J]. Geophysical Research Letters,2021.
APA Wei Wang.,Po Chen.,Ken Dueker.,Ye Zhang.,En-jui Lee.,...&Jianying Jiao.(2021).Coevolution of weathering front and water table.Geophysical Research Letters.
MLA Wei Wang,et al."Coevolution of weathering front and water table".Geophysical Research Letters (2021).
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