2024
DOI: 10.1029/2023wr035940
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Illuminating the “Invisible”: Substantial Deep Respiration and Lateral Export of Dissolved Carbon From Beneath Soil

Bryn Stewart,
James B. Shanley,
Serena Matt
et al.

Abstract: Dissolved organic and inorganic carbon (DOC and DIC) influence water quality, ecosystem health, and carbon cycling. Dissolved carbon species are produced by biogeochemical reactions and laterally exported to streams via distinct shallow and deep subsurface flow paths. These processes are arduous to measure and challenge the quantification of global carbon cycles. Here we ask: when, where, and how much is dissolved carbon produced in and laterally exported from the subsurface to streams? We used a catchment‐sca… Show more

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Cited by 2 publications
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“…Carbon respiration within bedrock fractures has been shown to exhibit rates comparable to those observed in soils (Hasenmueller et al, 2017;Tune et al, 2020). Deep respiration beneath soils have been shown to contribute to 40% of DIC production and >80% of DIC export (Stewart et al, 2024), and >7% of DIC production and >35% of DIC export (Wen et al, 2024). These deep processes however are typically not considered or quantified in Earth System models (Harper & Tibbett, 2013).…”
Section: Introductionmentioning
confidence: 99%
“…Carbon respiration within bedrock fractures has been shown to exhibit rates comparable to those observed in soils (Hasenmueller et al, 2017;Tune et al, 2020). Deep respiration beneath soils have been shown to contribute to 40% of DIC production and >80% of DIC export (Stewart et al, 2024), and >7% of DIC production and >35% of DIC export (Wen et al, 2024). These deep processes however are typically not considered or quantified in Earth System models (Harper & Tibbett, 2013).…”
Section: Introductionmentioning
confidence: 99%