Articles | Volume 12, issue 23
https://doi.org/10.5194/bg-12-7087-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-12-7087-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
08 Dec 2015
Research article |
| 08 Dec 2015
Ash leachates from some recent eruptions of Mount Etna (Italy) and Popocatépetl (Mexico) volcanoes and their impact on amphibian living freshwater organisms
M. D'Addabbo
Dipartimento di Scienze della Terra e Geoambientali, via Orabona 4, 70125 Bari, Italy
Dipartimento di Scienze della Terra e Geoambientali, via Orabona 4, 70125 Bari, Italy
IDPA-CNR, via M. Bianco 9, Milan, Italy
M. Guidi
IGG-CNR, via Moruzzi 1, Pisa, Italy
G. Capitani
Dipartimento di Scienze dell'Ambiente e del Territorio e di Scienze della Terra, Piazza della Scienza 1, 20126 Milan, Italy
P. Mantecca
Dipartimento di Scienze dell'Ambiente e del Territorio e di Scienze della Terra, Piazza della Scienza 1, 20126 Milan, Italy
G. Zanchetta
Dipartimento di Scienze della Terra, via S. Maria 53, 56126 Pisa, Italy
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Biagio Giaccio, Bernd Wagner, Giovanni Zanchetta, Adele Bertini, Gian Paolo Cavinato, Roberto de Franco, Fabio Florindo, David A. Hodell, Thomas A. Neubauer, Sebastien Nomade, Alison Pereira, Laura Sadori, Sara Satolli, Polychronis C. Tzedakis, Paul Albert, Paolo Boncio, Cindy De Jonge, Alexander Francke, Christine Heim, Alessia Masi, Marta Marchegiano, Helen M. Roberts, Anders Noren, and the MEME team
Sci. Dril., 33, 249–266, https://doi.org/10.5194/sd-33-249-2024, https://doi.org/10.5194/sd-33-249-2024, 2024
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A total of 42 Earth scientists from 14 countries met in Gioia dei Marsi, central Italy, on 23 to 27 October 2023 to explore the potential for deep drilling of the thick lake sediment sequence of the Fucino Basin. The aim was to reconstruct the history of climate, ecosystem, and biodiversity changes and of the explosive volcanism and tectonics in central Italy over the last 3.5 million years, constrained by a detailed radiometric chronology.
Timothy J. Pollard, Jon D. Woodhead, Russell N. Drysdale, R. Lawrence Edwards, Xianglei Li, Ashlea N. Wainwright, Mathieu Pythoud, Hai Cheng, John C. Hellstrom, Ilaria Isola, Eleonora Regattieri, Giovanni Zanchetta, and Dylan S. Parmenter
EGUsphere, https://doi.org/10.5194/egusphere-2024-3594, https://doi.org/10.5194/egusphere-2024-3594, 2024
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The uranium-thorium and uranium-lead radiometric dating methods are both capable of dating carbonate samples ranging in age from about 400,000 to 650,000 years. Here we test agreement between the two methods by 'double dating' speleothems (i.e. secondary cave mineral deposits) that grew within this age range. We demonstrate excellent agreement between the two dating methods and discuss their relative strengths and weaknesses.
Pierfrancesco Dellino, Fabio Dioguardi, Roberto Sulpizio, and Daniela Mele
EGUsphere, https://doi.org/10.5194/egusphere-2024-2971, https://doi.org/10.5194/egusphere-2024-2971, 2024
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Pyroclastic deposits are the only records left by pyroclastic flows at Vesuvius, deposits from past eruptions are the only way to get hints about the expected range of impact parameters. It is necessary to investigate the deposits first, then define a general model of the current that links deposit characteristics to flow dynamics, and finally reconstruct the impact parameters that better represent flow intensity in terms of damaging potential. This is the way the paper is organized.
Laura Sandri, Mattia de' Michieli Vitturi, Antonio Costa, Mauro Antonio Di Vito, Ilaria Rucco, Domenico Maria Doronzo, Marina Bisson, Roberto Gianardi, Sandro de Vita, and Roberto Sulpizio
Solid Earth, 15, 459–476, https://doi.org/10.5194/se-15-459-2024, https://doi.org/10.5194/se-15-459-2024, 2024
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We study the lahar hazard due to the remobilization of tephra deposits from reference eruptions at Somma–Vesuvius. To this end, we rely on the results of two companion papers dealing with field data and model calibration and run hundreds of simulations from the catchments around the target area to capture the uncertainty in the initial parameters. We process the simulations to draw maps of the probability of overcoming thresholds in lahar flow thickness and dynamic pressure relevant for risk.
Mauro Antonio Di Vito, Ilaria Rucco, Sandro de Vita, Domenico Maria Doronzo, Marina Bisson, Mattia de' Michieli Vitturi, Mauro Rosi, Laura Sandri, Giovanni Zanchetta, Elena Zanella, and Antonio Costa
Solid Earth, 15, 405–436, https://doi.org/10.5194/se-15-405-2024, https://doi.org/10.5194/se-15-405-2024, 2024
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We study the distribution of two historical pyroclastic fall–flow and lahar deposits from the sub-Plinian Vesuvius eruptions of 472 CE Pollena and 1631. The motivation comes directly from the widely distributed impact that both the eruptions and lahar phenomena had on the Campanian territory, not only around the volcano but also down the nearby Apennine valleys. Data on about 500 stratigraphic sections and modeling allowed us to evaluate the physical and dynamical impact of these phenomena.
Silvia Massaro, Manuel Stocchi, Beatriz Martínez Montesinos, Laura Sandri, Jacopo Selva, Roberto Sulpizio, Biagio Giaccio, Massimiliano Moscatelli, Edoardo Peronace, Marco Nocentini, Roberto Isaia, Manuel Titos Luzón, Pierfrancesco Dellino, Giuseppe Naso, and Antonio Costa
Nat. Hazards Earth Syst. Sci., 23, 2289–2311, https://doi.org/10.5194/nhess-23-2289-2023, https://doi.org/10.5194/nhess-23-2289-2023, 2023
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A new methodology to calculate a probabilistic long-term tephra fallout hazard assessment in southern Italy from the Neapolitan volcanoes is provided. By means of thousands of numerical simulations we quantify the mean annual frequency with which the tephra load at the ground exceeds critical thresholds in 50 years. The output hazard maps account for changes in eruptive regimes of each volcano and are also comparable with those of other natural disasters in which more sources are integrated.
Silvia Massaro, Roberto Sulpizio, Gianluca Norini, Gianluca Groppelli, Antonio Costa, Lucia Capra, Giacomo Lo Zupone, Michele Porfido, and Andrea Gabrieli
Solid Earth, 11, 2515–2533, https://doi.org/10.5194/se-11-2515-2020, https://doi.org/10.5194/se-11-2515-2020, 2020
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In this work we provide a 2D finite-element modelling of the stress field conditions around the Fuego de Colima volcano (Mexico) in order to test the response of the commercial Linear Static Analysis software to increasingly different geological constraints. Results suggest that an appropriate set of geological and geophysical data improves the mesh generation procedures and the degree of accuracy of numerical outputs, aimed at more reliable physics-based representations of the natural system.
Silvia Massaro, Antonio Costa, Roberto Sulpizio, Diego Coppola, and Lucia Capra
Solid Earth, 10, 1429–1450, https://doi.org/10.5194/se-10-1429-2019, https://doi.org/10.5194/se-10-1429-2019, 2019
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The Fuego de Colima volcano (Mexico) shows a complex eruptive history, with periods of rapid and slow lava dome growth punctuated by explosive activity. Here we reconstructed the 1998–2018 average discharge rate by means of satellite thermal data and the literature. Using spectral and wavelet analysis, we found a multi-term cyclic behavior that is in good agreement with numerical modeling, accounting for a variable magmatic feeding system composed of a single or double magma chamber system.
Monica Bini, Giovanni Zanchetta, Aurel Perşoiu, Rosine Cartier, Albert Català, Isabel Cacho, Jonathan R. Dean, Federico Di Rita, Russell N. Drysdale, Martin Finnè, Ilaria Isola, Bassem Jalali, Fabrizio Lirer, Donatella Magri, Alessia Masi, Leszek Marks, Anna Maria Mercuri, Odile Peyron, Laura Sadori, Marie-Alexandrine Sicre, Fabian Welc, Christoph Zielhofer, and Elodie Brisset
Clim. Past, 15, 555–577, https://doi.org/10.5194/cp-15-555-2019, https://doi.org/10.5194/cp-15-555-2019, 2019
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The Mediterranean region has returned some of the clearest evidence of a climatically dry period occurring approximately 4200 years ago. We reviewed selected proxies to infer regional climate patterns between 4.3 and 3.8 ka. Temperature data suggest a cooling anomaly, even if this is not uniform, whereas winter was drier, along with dry summers. However, some exceptions to this prevail, where wetter condition seems to have persisted, suggesting regional heterogeneity.
Ilaria Isola, Giovanni Zanchetta, Russell N. Drysdale, Eleonora Regattieri, Monica Bini, Petra Bajo, John C. Hellstrom, Ilaria Baneschi, Piero Lionello, Jon Woodhead, and Alan Greig
Clim. Past, 15, 135–151, https://doi.org/10.5194/cp-15-135-2019, https://doi.org/10.5194/cp-15-135-2019, 2019
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To understand the natural variability in the climate system, the hydrological aspect (dry and wet conditions) is particularly important for its impact on our societies. The reconstruction of past precipitation regimes can provide a useful tool for forecasting future climate changes. We use multi-proxy time series (oxygen and carbon isotopes, trace elements) from a speleothem to investigate circulation pattern variations and seasonality effects during the dry 4.2 ka event in central Italy.
Bernd Wagner, Thomas Wilke, Alexander Francke, Christian Albrecht, Henrike Baumgarten, Adele Bertini, Nathalie Combourieu-Nebout, Aleksandra Cvetkoska, Michele D'Addabbo, Timme H. Donders, Kirstin Föller, Biagio Giaccio, Andon Grazhdani, Torsten Hauffe, Jens Holtvoeth, Sebastien Joannin, Elena Jovanovska, Janna Just, Katerina Kouli, Andreas Koutsodendris, Sebastian Krastel, Jack H. Lacey, Niklas Leicher, Melanie J. Leng, Zlatko Levkov, Katja Lindhorst, Alessia Masi, Anna M. Mercuri, Sebastien Nomade, Norbert Nowaczyk, Konstantinos Panagiotopoulos, Odile Peyron, Jane M. Reed, Eleonora Regattieri, Laura Sadori, Leonardo Sagnotti, Björn Stelbrink, Roberto Sulpizio, Slavica Tofilovska, Paola Torri, Hendrik Vogel, Thomas Wagner, Friederike Wagner-Cremer, George A. Wolff, Thomas Wonik, Giovanni Zanchetta, and Xiaosen S. Zhang
Biogeosciences, 14, 2033–2054, https://doi.org/10.5194/bg-14-2033-2017, https://doi.org/10.5194/bg-14-2033-2017, 2017
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Lake Ohrid is considered to be the oldest existing lake in Europe. Moreover, it has a very high degree of endemic biodiversity. During a drilling campaign at Lake Ohrid in 2013, a 569 m long sediment sequence was recovered from Lake Ohrid. The ongoing studies of this record provide first important information on the environmental and evolutionary history of the lake and the reasons for its high endimic biodiversity.
Giovanni Zanchetta, Eleonora Regattieri, Biagio Giaccio, Bernd Wagner, Roberto Sulpizio, Alex Francke, Hendrik Vogel, Laura Sadori, Alessia Masi, Gaia Sinopoli, Jack H. Lacey, Melanie J. Leng, and Niklas Leicher
Biogeosciences, 13, 2757–2768, https://doi.org/10.5194/bg-13-2757-2016, https://doi.org/10.5194/bg-13-2757-2016, 2016
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Chronology is fundamental in paleoclimatology for understanding timing of events and their origin. In this paper we try to obtain a more detailed chronology for the interval comprised between ca. 140 and 70 ka for the DEEP core in Lake Ohrid using regional independently-dated archives (i.e. speleothems and/or lacustrine succession with well-dated volcanic layers). This allows to insert the DEEP chronology within a common chronological frame between different continental and marine proxy records.
Niklas Leicher, Giovanni Zanchetta, Roberto Sulpizio, Biagio Giaccio, Bernd Wagner, Sebastien Nomade, Alexander Francke, and Paola Del Carlo
Biogeosciences, 13, 2151–2178, https://doi.org/10.5194/bg-13-2151-2016, https://doi.org/10.5194/bg-13-2151-2016, 2016
Jack H. Lacey, Melanie J. Leng, Alexander Francke, Hilary J. Sloane, Antoni Milodowski, Hendrik Vogel, Henrike Baumgarten, Giovanni Zanchetta, and Bernd Wagner
Biogeosciences, 13, 1801–1820, https://doi.org/10.5194/bg-13-1801-2016, https://doi.org/10.5194/bg-13-1801-2016, 2016
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We use stable isotope data from carbonates to provide a palaeoenvironmental reconstruction covering the last 637 kyr at Lake Ohrid (FYROM/Albania). Our results indicate a relatively stable climate until 450 ka, wetter climate conditions at 400–250 ka, and a transition to a drier climate after 250 ka. This work emphasises the importance of Lake Ohrid as a valuable archive of climate change in the northern Mediterranean region.
Laura Sadori, Andreas Koutsodendris, Konstantinos Panagiotopoulos, Alessia Masi, Adele Bertini, Nathalie Combourieu-Nebout, Alexander Francke, Katerina Kouli, Sébastien Joannin, Anna Maria Mercuri, Odile Peyron, Paola Torri, Bernd Wagner, Giovanni Zanchetta, Gaia Sinopoli, and Timme H. Donders
Biogeosciences, 13, 1423–1437, https://doi.org/10.5194/bg-13-1423-2016, https://doi.org/10.5194/bg-13-1423-2016, 2016
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Lake Ohrid (FYROM/Albania) is the deepest, largest and oldest lake in Europe. To understand the climatic and environmental evolution of its area, a palynological study was undertaken for the last 500 ka. We found a correspondence between forested/non-forested periods and glacial-interglacial cycles of marine isotope stratigraphy. Our record shows a progressive change from cooler and wetter to warmer and dryer interglacial conditions. This shift is also visible in glacial vegetation.
Alexander Francke, Bernd Wagner, Janna Just, Niklas Leicher, Raphael Gromig, Henrike Baumgarten, Hendrik Vogel, Jack H. Lacey, Laura Sadori, Thomas Wonik, Melanie J. Leng, Giovanni Zanchetta, Roberto Sulpizio, and Biagio Giaccio
Biogeosciences, 13, 1179–1196, https://doi.org/10.5194/bg-13-1179-2016, https://doi.org/10.5194/bg-13-1179-2016, 2016
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Lake Ohrid (Macedonia, Albania) is thought to be more than 1.2 million years old. To recover a long paleoclimate record for the Mediterranean region, a deep drilling was carried out in 2013 within the scope of the Scientific Collaboration on Past Speciation Conditions in Lake Ohrid (SCOPSCO) project. Here, we present lithological, sedimentological, and (bio-)geochemical data from the upper 247.8 m composite depth of the overall 569 m long DEEP site record.
Elena Jovanovska, Aleksandra Cvetkoska, Torsten Hauffe, Zlatko Levkov, Bernd Wagner, Roberto Sulpizio, Alexander Francke, Christian Albrecht, and Thomas Wilke
Biogeosciences, 13, 1149–1161, https://doi.org/10.5194/bg-13-1149-2016, https://doi.org/10.5194/bg-13-1149-2016, 2016
H. Baumgarten, T. Wonik, D. C. Tanner, A. Francke, B. Wagner, G. Zanchetta, R. Sulpizio, B. Giaccio, and S. Nomade
Biogeosciences, 12, 7453–7465, https://doi.org/10.5194/bg-12-7453-2015, https://doi.org/10.5194/bg-12-7453-2015, 2015
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Gamma ray (GR) fluctuations and K values from downhole logging data obtained in the sediments of Lake Ohrid correlate with the global climate reference record (LR04 stack from δ18O) (Lisiecki and Raymo, 2005). GR and K values are considered a reliable proxy to depict glacial-interglacial cycles and document warm, humid and cold, drier periods. A robust age model for the downhole logging data over the past 630kyr was established and will play a crucial role for other working groups.
B. Giaccio, E. Regattieri, G. Zanchetta, B. Wagner, P. Galli, G. Mannella, E. Niespolo, E. Peronace, P. R. Renne, S. Nomade, G. P. Cavinato, P. Messina, A. Sposato, C. Boschi, F. Florindo, F. Marra, and L. Sadori
Sci. Dril., 20, 13–19, https://doi.org/10.5194/sd-20-13-2015, https://doi.org/10.5194/sd-20-13-2015, 2015
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As a pilot study for a possible depth-drilling project, an 82m long sedimentary succession was retrieved from the Fucino Basin, central Apennines, which hosts ca. 900m of lacustrine sediments. The acquired paleoclimatic record, from the retrieved core, spans the last 180ka and reveals noticeable variations related to the last two glacial-interglacial cycles. In light of these results, the Fucino sediments are likely to provide one of the longest continuous record for the last 2Ma.
B. Wagner, T. Wilke, S. Krastel, G. Zanchetta, R. Sulpizio, K. Reicherter, M. J. Leng, A. Grazhdani, S. Trajanovski, A. Francke, K. Lindhorst, Z. Levkov, A. Cvetkoska, J. M. Reed, X. Zhang, J. H. Lacey, T. Wonik, H. Baumgarten, and H. Vogel
Sci. Dril., 17, 19–29, https://doi.org/10.5194/sd-17-19-2014, https://doi.org/10.5194/sd-17-19-2014, 2014
B. Wagner, M. J. Leng, T. Wilke, A. Böhm, K. Panagiotopoulos, H. Vogel, J. H. Lacey, G. Zanchetta, and R. Sulpizio
Clim. Past, 10, 261–267, https://doi.org/10.5194/cp-10-261-2014, https://doi.org/10.5194/cp-10-261-2014, 2014
M. Magny, N. Combourieu-Nebout, J. L. de Beaulieu, V. Bout-Roumazeilles, D. Colombaroli, S. Desprat, A. Francke, S. Joannin, E. Ortu, O. Peyron, M. Revel, L. Sadori, G. Siani, M. A. Sicre, S. Samartin, A. Simonneau, W. Tinner, B. Vannière, B. Wagner, G. Zanchetta, F. Anselmetti, E. Brugiapaglia, E. Chapron, M. Debret, M. Desmet, J. Didier, L. Essallami, D. Galop, A. Gilli, J. N. Haas, N. Kallel, L. Millet, A. Stock, J. L. Turon, and S. Wirth
Clim. Past, 9, 2043–2071, https://doi.org/10.5194/cp-9-2043-2013, https://doi.org/10.5194/cp-9-2043-2013, 2013
L. Sadori, E. Ortu, O. Peyron, G. Zanchetta, B. Vannière, M. Desmet, and M. Magny
Clim. Past, 9, 1969–1984, https://doi.org/10.5194/cp-9-1969-2013, https://doi.org/10.5194/cp-9-1969-2013, 2013
M. Damaschke, R. Sulpizio, G. Zanchetta, B. Wagner, A. Böhm, N. Nowaczyk, J. Rethemeyer, and A. Hilgers
Clim. Past, 9, 267–287, https://doi.org/10.5194/cp-9-267-2013, https://doi.org/10.5194/cp-9-267-2013, 2013
B. Wagner, A. Francke, R. Sulpizio, G. Zanchetta, K. Lindhorst, S. Krastel, H. Vogel, J. Rethemeyer, G. Daut, A. Grazhdani, B. Lushaj, and S. Trajanovski
Clim. Past, 8, 2069–2078, https://doi.org/10.5194/cp-8-2069-2012, https://doi.org/10.5194/cp-8-2069-2012, 2012
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Biogeosciences, 21, 2571–2597, https://doi.org/10.5194/bg-21-2571-2024, https://doi.org/10.5194/bg-21-2571-2024, 2024
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Syahrul Kurniawan, Marife D. Corre, Amanda L. Matson, Hubert Schulte-Bisping, Sri Rahayu Utami, Oliver van Straaten, and Edzo Veldkamp
Biogeosciences, 15, 5131–5154, https://doi.org/10.5194/bg-15-5131-2018, https://doi.org/10.5194/bg-15-5131-2018, 2018
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Biogeosciences, 15, 1733–1747, https://doi.org/10.5194/bg-15-1733-2018, https://doi.org/10.5194/bg-15-1733-2018, 2018
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Biogeosciences, 15, 721–732, https://doi.org/10.5194/bg-15-721-2018, https://doi.org/10.5194/bg-15-721-2018, 2018
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Valérie F. Schwab, Martina Herrmann, Vanessa-Nina Roth, Gerd Gleixner, Robert Lehmann, Georg Pohnert, Susan Trumbore, Kirsten Küsel, and Kai U. Totsche
Biogeosciences, 14, 2697–2714, https://doi.org/10.5194/bg-14-2697-2017, https://doi.org/10.5194/bg-14-2697-2017, 2017
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Charlotte P. Iverach, Sabrina Beckmann, Dioni I. Cendón, Mike Manefield, and Bryce F. J. Kelly
Biogeosciences, 14, 215–228, https://doi.org/10.5194/bg-14-215-2017, https://doi.org/10.5194/bg-14-215-2017, 2017
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This research characterised the biogeochemical constraints on the origin of methane in an alluvial aquifer, concluding that the most likely source was the upward migration from a directly underlying coal seam. This research was undertaken due to concerns about the effect of coal seam gas production on groundwater quality in the study area. The implications include the fact that no methane is being produced in the aquifer (in situ) and that there is local natural connectivity in the study area.
W. Eschenbach, R. Well, and W. Walther
Biogeosciences, 12, 2327–2346, https://doi.org/10.5194/bg-12-2327-2015, https://doi.org/10.5194/bg-12-2327-2015, 2015
J. F. Dean, J. A. Webb, G. E. Jacobsen, R. Chisari, and P. E. Dresel
Biogeosciences, 11, 4099–4114, https://doi.org/10.5194/bg-11-4099-2014, https://doi.org/10.5194/bg-11-4099-2014, 2014
M. Dietzel, A. Leis, R. Abdalla, J. Savarino, S. Morin, M. E. Böttcher, and S. Köhler
Biogeosciences, 11, 3149–3161, https://doi.org/10.5194/bg-11-3149-2014, https://doi.org/10.5194/bg-11-3149-2014, 2014
T. G. Troxler, C. Coronado-Molina, D. N. Rondeau, S. Krupa, S. Newman, M. Manna, R. M. Price, and F. H. Sklar
Biogeosciences, 11, 899–914, https://doi.org/10.5194/bg-11-899-2014, https://doi.org/10.5194/bg-11-899-2014, 2014
W. Eschenbach and R. Well
Biogeosciences, 10, 1013–1035, https://doi.org/10.5194/bg-10-1013-2013, https://doi.org/10.5194/bg-10-1013-2013, 2013
H. J. M. van Grinsven, H. F. M. ten Berge, T. Dalgaard, B. Fraters, P. Durand, A. Hart, G. Hofman, B. H. Jacobsen, S. T. J. Lalor, J. P. Lesschen, B. Osterburg, K. G. Richards, A.-K. Techen, F. Vertès, J. Webb, and W. J. Willems
Biogeosciences, 9, 5143–5160, https://doi.org/10.5194/bg-9-5143-2012, https://doi.org/10.5194/bg-9-5143-2012, 2012
B. Hansen, T. Dalgaard, L. Thorling, B. Sørensen, and M. Erlandsen
Biogeosciences, 9, 3277–3286, https://doi.org/10.5194/bg-9-3277-2012, https://doi.org/10.5194/bg-9-3277-2012, 2012
J. B. Heffernan, A. R. Albertin, M. L. Fork, B. G. Katz, and M. J. Cohen
Biogeosciences, 9, 1671–1690, https://doi.org/10.5194/bg-9-1671-2012, https://doi.org/10.5194/bg-9-1671-2012, 2012
C. Fallico, S. Troisi, A. Molinari, and M. F. Rivera
Biogeosciences, 7, 2545–2556, https://doi.org/10.5194/bg-7-2545-2010, https://doi.org/10.5194/bg-7-2545-2010, 2010
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Short summary
Leaching experiments were carried out on fresh ash samples from the 2012 Popocatépetl, and 2011/12 Etna eruptions, in order to investigate the release of compounds in water. Results were discussed in the light of changing pH and release of compounds for the different leachates. They were used for toxicity experiments on living biota (Xenopus laevis). They are mildly toxic, and no significant differences exist between the toxic profiles of the two leachates.
Leaching experiments were carried out on fresh ash samples from the 2012 Popocatépetl, and...
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