Decoupled sedimentary records of combustion: Causes and implications
| Autor: | Ulrich M. Hanke, Timothy I. Eglinton, Christopher M. Reddy, Michael W. I. Schmidt, Daniel B. Wiedemeier, Ana L. L. Braun |
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| Rok vydání: | 2016 |
| Předmět: |
010504 meteorology & atmospheric sciences
Ecology Earth science Transport pathways chemistry.chemical_element 010501 environmental sciences Combustion 01 natural sciences Geophysics Deposition (aerosol physics) chemistry Combustion products General Earth and Planetary Sciences Environmental science Sedimentary rock Biomass burning Carbon 0105 earth and related environmental sciences |
| Zdroj: | Geophysical Research Letters. 43:5098-5108 |
| ISSN: | 1944-8007 0094-8276 |
| DOI: | 10.1002/2016gl069253 |
| Popis: | Pyrogenic carbon (PyC) is a collective term for carbon-rich residues comprised of a continuum of products arising from biomass burning and fossil-fuel combustion. PyC is ubiquitous in the environment where it can be transported by wind and water before being deposited in aquatic sediments. We compare results from four different methods used to trace PyC that were applied to a high-temporal resolution sedimentary record in order to constrain changes in PyC concentrations and fluxes over the past ~250 years. We find markedly discordant records for different PyC tracers, particularly during the pre-industrial age, implying different origins and modes of supply of sedimentary PyC. In addition to providing new insights into the composition of sedimentary combustion products, this study reveals that elucidation of past combustion processes, and development of accurate budgets of PyC production and deposition on local to regional scales requires careful consideration of both source characteristics and transport processes. |
| Databáze: | OpenAIRE |
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