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- W2071453721 abstract "Black carbon (BC) is ubiquitous in terrestrial environments and its unique physical and chemical properties suggest that it may play an important role in the global carbon budget (GCB). A critical issue is whether the global production of BC results in significant amounts of carbon (C) being removed from the short-term bio-atmospheric carbon cycle and transferred to the long-term geological carbon cycle. Several dozen field and laboratory based studies of BC formation during the burning of biomass have been documented. Findings are difficult to interpret because they have been expressed in an inconsistent manner, and because different physical and chemical methods have been used to derive them. High error terms documented in many of these studies also highlight the problems associated with the quantification of the amount of biomass C consumed in fire, the amount of residue produced and the constituents of that residue. To be able to estimate the potential for BC as a carbon sink, issues regarding its definition, the methods used in its identification and measurement, and the way it is expressed in relation to other components of the carbon cycle need to be addressed. This paper presents BC data in a standard way; BC production as a percentage of the amount of C consumed by fire (BC/CC), which can be readily integrated into a larger carbon budget. Results from previous studies and new data from Australian ecosystems were recalculated in this way. As part of this process, several BC estimates derived solely from physical methods were discarded, based on their inability to accurately identify and quantify the BC component of the post-fire residue. Instead, more focus was placed on BC estimates obtained by chemical methods. This recalculated data lowered the estimate for BC formation in forest fires from 4% to 5% to < 3% BC/CC. For savannah and grassland fires a value of < 3% is consistent with reported data, but considerable variation among estimates remains. An updated flow-chart linking the sources, fluxes and pools of BC formed in the terrestrial environment with the aquatic and marine environments, and estimates of mean residence times for BC are also presented." @default.
- W2071453721 created "2016-06-24" @default.
- W2071453721 creator A5022731672 @default.
- W2071453721 creator A5069258377 @default.
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- W2071453721 date "2006-10-01" @default.
- W2071453721 modified "2023-10-18" @default.
- W2071453721 title "Formation, transformation and transport of black carbon (charcoal) in terrestrial and aquatic ecosystems" @default.
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- W2071453721 doi "https://doi.org/10.1016/j.scitotenv.2006.06.007" @default.
- W2071453721 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/16860374" @default.
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