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231224s2015 xx |||||o 00| ||eng c |
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|a 10.1111/gcb.12800
|2 doi
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|a pubmed25n0811.xml
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|a (DE-627)NLM243366418
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|a (NLM)25378275
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Santín, Cristina
|e verfasserin
|4 aut
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|a Pyrogenic organic matter production from wildfires
|b a missing sink in the global carbon cycle
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|c 2015
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 16.11.2015
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|a Date Revised 08.01.2019
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|a published: Print-Electronic
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|a CommentIn: Glob Chang Biol. 2015 Aug;21(8):2831. doi: 10.1111/gcb.12836. - PMID 25510226
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|a Citation Status MEDLINE
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|a © 2014 The Authors. Global Change Biology Published by John Wiley & Sons Ltd.
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|a Wildfires release substantial quantities of carbon (C) into the atmosphere but they also convert part of the burnt biomass into pyrogenic organic matter (PyOM). This is richer in C and, overall, more resistant to environmental degradation than the original biomass, and, therefore, PyOM production is an efficient mechanism for C sequestration. The magnitude of this C sink, however, remains poorly quantified, and current production estimates, which suggest that ~1-5% of the C affected by fire is converted to PyOM, are based on incomplete inventories. Here, we quantify, for the first time, the complete range of PyOM components found in-situ immediately after a typical boreal forest fire. We utilized an experimental high-intensity crown fire in a jack pine forest (Pinus banksiana) and carried out a detailed pre- and postfire inventory and quantification of all fuel components, and the PyOM (i.e., all visually charred, blackened materials) produced in each of them. Our results show that, overall, 27.6% of the C affected by fire was retained in PyOM (4.8 ± 0.8 t C ha(-1)), rather than emitted to the atmosphere (12.6 ± 4.5 t C ha(-1)). The conversion rates varied substantially between fuel components. For down wood and bark, over half of the C affected was converted to PyOM, whereas for forest floor it was only one quarter, and less than a tenth for needles. If the overall conversion rate found here were applicable to boreal wildfire in general, it would translate into a PyOM production of ~100 Tg C yr(-1) by wildfire in the global boreal regions, more than five times the amount estimated previously. Our findings suggest that PyOM production from boreal wildfires, and potentially also from other fire-prone ecosystems, may have been underestimated and that its quantitative importance as a C sink warrants its inclusion in the global C budget estimates
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a biochar
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|a black carbon
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| 650 |
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|a boreal forest
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| 650 |
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|a carbon emissions
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| 650 |
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|a charcoal
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| 650 |
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|a firesmart experimental fire
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| 650 |
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|a pyrogenic carbon
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| 650 |
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|a Organic Chemicals
|2 NLM
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| 650 |
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|a Carbon
|2 NLM
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| 650 |
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|a 7440-44-0
|2 NLM
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| 700 |
1 |
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|a Doerr, Stefan H
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Preston, Caroline M
|e verfasserin
|4 aut
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| 700 |
1 |
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|a González-Rodríguez, Gil
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Global change biology
|d 1999
|g 21(2015), 4 vom: 06. Apr., Seite 1621-33
|w (DE-627)NLM098239996
|x 1365-2486
|7 nnns
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| 773 |
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|g volume:21
|g year:2015
|g number:4
|g day:06
|g month:04
|g pages:1621-33
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| 856 |
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|u http://dx.doi.org/10.1111/gcb.12800
|3 Volltext
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