Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/8612| DC Field | Value | Language |
|---|---|---|
| dc.contributor.authorall | Rey, A.; Museo Nacional de Ciencias Naturales (MNCN), Spanish National Research Council (CSIC), Madrid, Spain. | en |
| dc.contributor.authorall | Etiope, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia | en |
| dc.contributor.authorall | Belelli-Marchesini, L.; Dipartimento per l’Innovazione nei Sistemi Biologici, Agroalimentari e Forestali (DIBAF), University of Tuscia, Viterbo, Italy. | en |
| dc.contributor.authorall | Papale, D.; Dipartimento per l’Innovazione nei Sistemi Biologici, Agroalimentari e Forestali (DIBAF), University of Tuscia, Viterbo, Italy. | en |
| dc.contributor.authorall | Valentini, R.; Dipartimento per l’Innovazione nei Sistemi Biologici, Agroalimentari e Forestali (DIBAF), University of Tuscia, Viterbo, Italy. | en |
| dc.date.accessioned | 2013-04-12T07:04:39Z | en |
| dc.date.available | 2013-04-12T07:04:39Z | en |
| dc.date.issued | 2012-09-27 | en |
| dc.identifier.uri | http://hdl.handle.net/2122/8612 | en |
| dc.description.abstract | At a semiarid steppe site located in the SE of Spain, relatively large CO2 emissions were measured that could not be attributed to the ecosystem activity alone. Since the study site was located in a tectonically active area, it was hypothesized that a part of the measured CO2 was of geologic origin. This investigation included a survey of soil CO2 efflux, together with carbon isotope analyses of the CO2 in the soil atmosphere, soil CO2 efflux (i.e., Keeling plots), groundwater and local thermal springs. These measurements confirmed the hypothesis of degassing from geologic sources. In areas with local faults and ancient volcanic structures, soil CO2 efflux rates were significantly higher (i.e., up to 6.3 and 1.4 mmol CO2 m 2 s 1) than measurements in a comparable site that was some distance from fault sites (means of 1.0 and 0.43 mmol CO2 m 2 s 1 in March and June, respectively). The CO2 concentration in the soil atmosphere at the eddy covariance site reached 0.14% v/v at 0.70 m soil depth with a 13C-enriched isotopic composition (d13C from 10.2‰ to 16.6‰), consistent with the isotopic composition of the soil CO2 efflux estimated by Keeling plots (i.e., 16.6‰). 13C-enriched CO2 also occurred in local aquifers, and there was evidence of degassing from deep crust and mantle at regional scale by the helium isotopic ratio in spring waters located about 30 km (R/Ra: 0.12) and 200 km (R/Ra: 0.95) NW of the eddy covariance site. This study highlights the importance of considering CO2 sources of geologic origin when assessing the net ecosystem carbon balance of sites that may possibly be affected by circulation of such CO2-rich fluids. | en |
| dc.language.iso | English | en |
| dc.relation.ispartof | Journal of geophysical research | en |
| dc.relation.ispartofseries | / 117 (2012) | en |
| dc.subject | carbon dioxide | en |
| dc.subject | soil | en |
| dc.subject | ecosystems | en |
| dc.title | Geologic carbon sources may confound ecosystem carbon balance estimates: Evidence from a semiarid steppe in the southeast of Spain | en |
| dc.type | article | en |
| dc.description.status | Published | en |
| dc.type.QualityControl | Peer-reviewed | en |
| dc.description.pagenumber | G03034 | en |
| dc.subject.INGV | 04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistry | en |
| dc.identifier.doi | 10.1029/2012JG001991 | en |
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| dc.description.obiettivoSpecifico | 4.5. Studi sul degassamento naturale e sui gas petroliferi | en |
| dc.description.journalType | JCR Journal | en |
| dc.description.fulltext | restricted | en |
| dc.contributor.author | Rey, A. | en |
| dc.contributor.author | Etiope, G. | en |
| dc.contributor.author | Belelli-Marchesini, L. | en |
| dc.contributor.author | Papale, D. | en |
| dc.contributor.author | Valentini, R. | en |
| dc.contributor.department | Museo Nacional de Ciencias Naturales (MNCN), Spanish National Research Council (CSIC), Madrid, Spain. | en |
| dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia | en |
| dc.contributor.department | Dipartimento per l’Innovazione nei Sistemi Biologici, Agroalimentari e Forestali (DIBAF), University of Tuscia, Viterbo, Italy. | en |
| dc.contributor.department | Dipartimento per l’Innovazione nei Sistemi Biologici, Agroalimentari e Forestali (DIBAF), University of Tuscia, Viterbo, Italy. | en |
| dc.contributor.department | Dipartimento per l’Innovazione nei Sistemi Biologici, Agroalimentari e Forestali (DIBAF), University of Tuscia, Viterbo, Italy. | en |
| item.openairetype | article | - |
| item.cerifentitytype | Publications | - |
| item.languageiso639-1 | en | - |
| item.grantfulltext | restricted | - |
| item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
| item.fulltext | With Fulltext | - |
| crisitem.author.dept | Museo Nacional de Ciencias Naturales (MNCN), Spanish National Research Council (CSIC), Madrid, Spain. | - |
| crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia | - |
| crisitem.author.dept | Department for Innovation in Biological, Agro-Food and Forest Systems (DIBAF), University of La Tuscia, Viterbo, Italy | - |
| crisitem.author.dept | Department for Innovation in Biological, Agro-Food and Forest Systems (DIBAF), University of La Tuscia, Viterbo, Italy | - |
| crisitem.author.dept | Dipartimento per l’Innovazione nei Sistemi Biologici, Agroalimentari e Forestali (DIBAF), University of Tuscia, Viterbo, Italy. | - |
| crisitem.author.orcid | 0000-0001-8614-4221 | - |
| crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| crisitem.classification.parent | 04. Solid Earth | - |
| crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| Appears in Collections: | Article published / in press | |
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