FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4382559984> ?p ?o ?g. }

• W4382559984 abstract "<strong class=journal-contentHeaderColor>Abstract.</strong> Chemical weathering of sedimentary rocks can release carbon dioxide (CO₂) and consume oxygen (O₂) via the oxidation of petrogenic organic carbon and sulfide minerals. These pathways govern Earth’s surface system and climate over geological timescales, but the present-day weathering fluxes and their environmental controls are only partly constrained due to a lack of in situ measurements. Here, we investigate the gaseous exchange of CO₂ and O₂ during the oxidative weathering of black shales and marls exposed in the French southern Alps. On six fieldtrips over one year, we use drilled headspace chambers to measure the CO₂ concentrations in the shallow critical zone, and quantify CO₂ fluxes in real-time. Importantly, we develop a new approach to estimate the volume of rock that contributes CO₂ to a chamber, and assess effective diffusive gas exchange, by first quantifying the mass of CO₂ that is stored in a chamber and connected rock pores. Both rock types are characterized by similar contributing rock volumes and diffusive movement of CO₂. However, CO₂ emissions differed between the rock types, with yields over rock outcrop surfaces (inferred from the contributing rock volume and the local weathering depths) ranging between 166 tC km^-2 yr^-1 and 2,416 tC km^-2 yr^-1 for black shales and between 83 tC km^-2 yr^-1 and 1,558 tC km^-2 yr^-1 for marls over the study period. Having quantified diffusive processes, chamber-based O₂ concentration measurements are used to calculate O₂ fluxes. The rate of O₂ consumption increased with production of CO₂, and with increased temperature, with an average O₂ : CO₂ molar ratio of 10 : 1. If O₂ consumption occurs by both rock organic carbon oxidation and sulfide oxidation, either an additional O₂ sink needs to be identified, or significant export of dissolved inorganic carbon occurs from the weathering zone. Together, our findings refine the tools we have to probe CO₂ and O₂ exchange in rocks at Earth’s surface and shed new light on CO₂ and O₂ fluxes, their drivers and the fate of rock-derived carbon." @default.
• W4382559984 created "2023-06-30" @default.
• W4382559984 creator A5048575004 @default.
• W4382559984 date "2023-06-29" @default.
• W4382559984 modified "2023-10-16" @default.
• W4382559984 title "Comment on esurf-2023-15" @default.
• W4382559984 doi "https://doi.org/10.5194/esurf-2023-15-rc1" @default.
• W4382559984 hasPublicationYear "2023" @default.
• W4382559984 type Work @default.
• W4382559984 citedByCount "0" @default.
• W4382559984 crossrefType "peer-review" @default.
• W4382559984 hasAuthorship W4382559984A5048575004 @default.
• W4382559984 hasBestOaLocation W43825599841 @default.
• W4382559984 hasConcept C127313418 @default.
• W4382559984 hasConcept C138170599 @default.
• W4382559984 hasConcept C169212394 @default.
• W4382559984 hasConcept C17409809 @default.
• W4382559984 hasConcept C178790620 @default.
• W4382559984 hasConcept C185592680 @default.
• W4382559984 hasConcept C199289684 @default.
• W4382559984 hasConcept C40724407 @default.
• W4382559984 hasConcept C530467964 @default.
• W4382559984 hasConcept C6494504 @default.
• W4382559984 hasConceptScore W4382559984C127313418 @default.
• W4382559984 hasConceptScore W4382559984C138170599 @default.
• W4382559984 hasConceptScore W4382559984C169212394 @default.
• W4382559984 hasConceptScore W4382559984C17409809 @default.
• W4382559984 hasConceptScore W4382559984C178790620 @default.
• W4382559984 hasConceptScore W4382559984C185592680 @default.
• W4382559984 hasConceptScore W4382559984C199289684 @default.
• W4382559984 hasConceptScore W4382559984C40724407 @default.
• W4382559984 hasConceptScore W4382559984C530467964 @default.
• W4382559984 hasConceptScore W4382559984C6494504 @default.
• W4382559984 hasLocation W43825599841 @default.
• W4382559984 hasOpenAccess W4382559984 @default.
• W4382559984 hasPrimaryLocation W43825599841 @default.
• W4382559984 hasRelatedWork W1958275154 @default.
• W4382559984 hasRelatedWork W1995558841 @default.
• W4382559984 hasRelatedWork W2226025285 @default.
• W4382559984 hasRelatedWork W2317694876 @default.
• W4382559984 hasRelatedWork W2338326138 @default.
• W4382559984 hasRelatedWork W2349677304 @default.
• W4382559984 hasRelatedWork W2367265136 @default.
• W4382559984 hasRelatedWork W2602715865 @default.
• W4382559984 hasRelatedWork W2980076569 @default.
• W4382559984 hasRelatedWork W4293236593 @default.
• W4382559984 isParatext "false" @default.
• W4382559984 isRetracted "false" @default.
• W4382559984 workType "peer-review" @default.