Unveiling the temperature and fire intensity of wildfire through nuclear magnetic resonance and stable isotope analysis
Fire is considered one of the main disturbing factors of ecosystems at global scale. Causing physical and chemical changes on soil organic matter (SOM) (González-Pérez et al., 2004). One of the main consequences of burning is the formation of refractory material with a high degree of aromatization, black carbon (BC) (Hedges et al., 2000). The chemical composition of BC and the intensity of fire impacts on SOM depend strongly on fire conditions (De la Rosa et al., 2008). Therefore, fire intensity and duration may help to understand these processes. Nonetheless, in situ-determination is difficult. Burning experiments under laboratory conditions and traditional analytical techniques have provided contradictory results with respect to the impact of temperature and time of heating. Therefore the present research studies the relations between temperature and fire duration (are you sure that this is the right word?) with the composition of the resulting fire-affected organic matter. To achieve this, litter samples were collected below well-developed oak-canopy (Quercus suber) in the Doñana National Park (SW Spain). Litter was air dried and heated at 250, 300 and 350 oC in a muffle furnace during two different time periods (5 and 15 minutes). Unburnt air-dried litter samples were used as control. After heating, litter samples were analysed using solid-state CPMAS 13C-NMR spectroscopy and carbon isotope ratio mass spectrometry (C-IRMS).
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European Association of Organic Geochemists
2017-09-17
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dig-irnas-es-10261-1635042018-09-12T12:04:18Z Unveiling the temperature and fire intensity of wildfire through nuclear magnetic resonance and stable isotope analysis Jiménez Morillo, N. T. Granged, Arturo Knicker, Heike Rosa Arranz, José M. de la Jordán, A. Zavala, Miguel A. Jiménez González, M. A. González-Vila, Francisco Javier González-Pérez, José Antonio Ministerio de Economía y Competitividad (España) Fire is considered one of the main disturbing factors of ecosystems at global scale. Causing physical and chemical changes on soil organic matter (SOM) (González-Pérez et al., 2004). One of the main consequences of burning is the formation of refractory material with a high degree of aromatization, black carbon (BC) (Hedges et al., 2000). The chemical composition of BC and the intensity of fire impacts on SOM depend strongly on fire conditions (De la Rosa et al., 2008). Therefore, fire intensity and duration may help to understand these processes. Nonetheless, in situ-determination is difficult. Burning experiments under laboratory conditions and traditional analytical techniques have provided contradictory results with respect to the impact of temperature and time of heating. Therefore the present research studies the relations between temperature and fire duration (are you sure that this is the right word?) with the composition of the resulting fire-affected organic matter. To achieve this, litter samples were collected below well-developed oak-canopy (Quercus suber) in the Doñana National Park (SW Spain). Litter was air dried and heated at 250, 300 and 350 oC in a muffle furnace during two different time periods (5 and 15 minutes). Unburnt air-dried litter samples were used as control. After heating, litter samples were analysed using solid-state CPMAS 13C-NMR spectroscopy and carbon isotope ratio mass spectrometry (C-IRMS). The authors thanks the Spanish Ministry of Economy and Competitiveness (MINECO) through the INTERCARBON project (CGL2016-78937-R). N.T. Jiménez-Morillo thanks the MINECO for funding his FPI research grants (BES-2013-062573). Peer Reviewed 2018-04-11T13:04:38Z 2018-04-11T13:04:38Z 2017-09-17 2018-04-11T13:04:38Z póster de congreso http://purl.org/coar/resource_type/c_6670 28th International Meeting on Organic Geochemistry 17 – 22 September 2017, Florence, Italy http://hdl.handle.net/10261/163504 http://dx.doi.org/10.13039/501100003329 #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2016-78937-R info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/BES-2013-062573 Sí open European Association of Organic Geochemists |
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Fire is considered one of the main disturbing factors of ecosystems at global scale. Causing physical and chemical changes on soil organic matter (SOM) (González-Pérez et al., 2004). One of the main consequences of burning is the formation of refractory material with a high degree of aromatization, black carbon (BC) (Hedges et al., 2000). The chemical composition of BC and the intensity of fire impacts on SOM depend strongly on fire conditions (De la Rosa et al., 2008). Therefore, fire intensity and duration may help to understand these processes. Nonetheless, in situ-determination is difficult. Burning experiments under laboratory conditions and traditional analytical techniques have provided contradictory results with respect to the impact of temperature and time of heating. Therefore the present research studies the relations between temperature and fire duration (are you sure that this is the right word?) with the composition of the resulting fire-affected organic matter. To achieve this, litter samples were collected below well-developed oak-canopy (Quercus suber) in the Doñana National Park (SW Spain). Litter was air dried and heated at
250, 300 and 350 oC in a muffle furnace during two different time periods (5 and 15 minutes). Unburnt air-dried litter samples were used as control. After heating, litter samples were analysed using solid-state CPMAS 13C-NMR spectroscopy and carbon isotope ratio mass spectrometry (C-IRMS). |
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Ministerio de Economía y Competitividad (España) |
author_facet |
Ministerio de Economía y Competitividad (España) Jiménez Morillo, N. T. Granged, Arturo Knicker, Heike Rosa Arranz, José M. de la Jordán, A. Zavala, Miguel A. Jiménez González, M. A. González-Vila, Francisco Javier González-Pérez, José Antonio |
format |
póster de congreso |
author |
Jiménez Morillo, N. T. Granged, Arturo Knicker, Heike Rosa Arranz, José M. de la Jordán, A. Zavala, Miguel A. Jiménez González, M. A. González-Vila, Francisco Javier González-Pérez, José Antonio |
spellingShingle |
Jiménez Morillo, N. T. Granged, Arturo Knicker, Heike Rosa Arranz, José M. de la Jordán, A. Zavala, Miguel A. Jiménez González, M. A. González-Vila, Francisco Javier González-Pérez, José Antonio Unveiling the temperature and fire intensity of wildfire through nuclear magnetic resonance and stable isotope analysis |
author_sort |
Jiménez Morillo, N. T. |
title |
Unveiling the temperature and fire intensity of wildfire through nuclear magnetic resonance and stable isotope analysis |
title_short |
Unveiling the temperature and fire intensity of wildfire through nuclear magnetic resonance and stable isotope analysis |
title_full |
Unveiling the temperature and fire intensity of wildfire through nuclear magnetic resonance and stable isotope analysis |
title_fullStr |
Unveiling the temperature and fire intensity of wildfire through nuclear magnetic resonance and stable isotope analysis |
title_full_unstemmed |
Unveiling the temperature and fire intensity of wildfire through nuclear magnetic resonance and stable isotope analysis |
title_sort |
unveiling the temperature and fire intensity of wildfire through nuclear magnetic resonance and stable isotope analysis |
publisher |
European Association of Organic Geochemists |
publishDate |
2017-09-17 |
url |
http://hdl.handle.net/10261/163504 http://dx.doi.org/10.13039/501100003329 |
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