Items where Author is "Wehrmann, Heidi"

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Number of items: 99.

Bonanati, C., Wehrmann, H., Portnyagin, M. and Hoernle, K. (2017) The Eyjafiallajökull 2010 eruption and the preservation of medium-sized eruptions in marine surface sediment, offshore southern Iceland. Quaternary Research, 87 (3). pp. 386-406. DOI 10.1017/qua.2017.15.

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Bonanati, C., Wehrmann, H., Hoernle, K. , Kutterolf, S. , Portnyagin, M. , Mirzaloo, M. , Nürnberg, D. , Strehlow, K. and Werner, R. (2017) A 68,000 year tephra record in marine sediment cores offshore southeast Iceland. Open Access [Talk] In: IAVCEI 2017 Scientific Assembly. , 14.-18.08.2017, Portland, Oregon, USA .

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de Moor, J. M., Aiuppa, A., Avard, G., Wehrmann, H., Dunbar, N. W., Muller, C., Tamburello, G., Guidice, G., Liuzzo, M., Moretti, R., Conde, A. V. and Galle, B. (2016) Turmoil at Turrialba volcano (Costa Rica): Degassing and eruptive behavior inferred from high-frequency gas monitoring. Open Access Journal of Geophysical Research: Solid Earth, 121 (8). pp. 5761-5775. DOI 10.1002/2016JB013150.


Bonanati, C., Wehrmann, H., Portnyagin, M. , Hoernle, K. , Mirzaloo, M. and Nürnberg, D. (2016) Tephra in marine sediment cores offshore southern Iceland: A 68,000 year record of explosive volcanism. [Poster] In: EGU General Assembly 2016. , 17.-22.04.2016, Vienna, Austria .

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Bonanati, C., Wehrmann, H., Portnyagin, M. , Kutterolf, S. and Hoernle, K. (2016) Tephra in marine sediment cores offshore southeast Iceland: A 68,000 year volcanic record. [Poster] In: Cities on Volcanoes 9. , 20.-25.11.2016, Puerto Varas, Chile .

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Wehrmann, H., Freundt, A. and Kutterolf, S. (2016) The 12.4 ka Upper Apoyeque Tephra, Nicaragua: stratigraphy, dispersal, composition, magma reservoir conditions and trigger of the plinian eruption. Open Access [Poster] In: EGU General Assembly 2016. , 17.-22.04.2016, Vienna, Austria .

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Kutterolf, S. , Hansteen, T. H. , Freundt, A. , Wehrmann, H., Appel, K., Krüger, K. and Perez, W. (2015) Bromine and chlorine emissions from Plinian eruptions along the Central American Volcanic Arc: From source to atmosphere. Earth and Planetary Science Letters, 429 . pp. 234-246. DOI 10.1016/j.epsl.2015.07.064.

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Bonanati, C., Portnyagin, M. , Wehrmann, H. and Hoernle, K. (2015) Volcanic glass in surface sediments offshore southern Iceland: Can eruptions such as Eyjafjallajökull 2010 be traced in the marine archive?. [Talk] In: EGU General Assembly 2015. , 12.–17.04.2015 , Vienna, Austria .


Hoernle, K. , Jacques, G. and Wehrmann, H. (2015) Inputs and Outputs along 1100 km of the Southern Chilean Subduction Zone: From 6000 m below to 6000 m above Sea Level. [Invited talk] In: The University of Sydney, Geoscience School Seminar. , 22.01.2015, Sydney, Australia .


Hoernle, K. , Jacques, G. and Wehrmann, H. (2015) Inputs and Outputs along 1100 km of the Southern Chilean Subduction Zone: From 6000 m below to 6000 m above Sea Level. [Invited talk] In: Institute for Marine and Antarctic Studies and the University of Tasmania. , 19.01.2015, Hobart, Australia .

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Freundt, A. , Grevemeyer, I. , Rabbel, W., Hansteen, T. H. , Hensen, C. , Wehrmann, H., Kutterolf, S. , Halama, R. and Frische, M. (2014) Volatile (H2O, CO2, Cl, S) budget of the Central American subduction zone. International Journal of Earth Sciences, 103 (7). pp. 2101-2127. DOI 10.1007/s00531-014-1001-1.

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Völker, D., Wehrmann, H., Kutterolf, S. , Iyer, K. , Rabbel, W., Geersen, J. and Hoernle, K. (2014) Constraining input and output fluxes of the southern Central Chile Subduction Zone: water, chlorine, sulfur. International Journal of Earth Sciences, 103 (7). pp. 2129-2153. DOI 10.1007/s00531-014-1002-0.

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Wehrmann, H., Hoernle, K. , Garbe-Schönberg, D., Jacques, G., Mahlke, J. and Schumann, K. (2014) Insights from trace element geochemistry as to the roles of subduction zone geometry and subduction input on the chemistry of arc magmas. International Journal of Earth Sciences, 103 (7). pp. 1929-1944. DOI 10.1007/s00531-013-0917-1.

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Wehrmann, H., Hoernle, K. , Jacques, G., Garbe-Schönberg, D., Schumann, K., Mahlke, J. and Lara, L. E. (2014) Volatile (sulphur and chlorine), major, and trace element geochemistry of mafic to intermediate tephras from the Chilean Southern Volcanic Zone (33–43°S). International Journal of Earth Sciences, 103 (7). pp. 1945-1962. DOI 10.1007/s00531-014-1006-9.

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Jacques, G., Hoernle, K. , Gill, J., Wehrmann, H., Bindeman, I. and Lara, L. E. (2014) Geochemical variations in the Central Southern Volcanic Zone, Chile (38-43°S): The role of fluids in generating arc magmas. Open Access Chemical Geology, 371 . pp. 27-45. DOI 10.1016/j.chemgeo.2014.01.015.


Hoernle, K. , Jacques, G. and Wehrmann, H. (2014) Inputs and Outputs along 1100 km of the Southern Chilean Subduction Zone: From 6000m below to 6000m above sea Level. [Invited talk] In: Macquarie University Earth and Planetary Sciences Departmental Seminar. , 24.10.2014, Sydney, Australia .

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Hoernle, K. , Jacques, G., Gill, J., Wehrmann, H. and Lara, L. (2014) The Ins and Outs along 1100 km of the Southern Chilean Subduction Zone and Argentinian Backarc: From 6000 m below to 6000m above Sea Level. [Talk] In: Geokolloquium Universität Erlangen-Nürnberg. , 03.02.2014, Erlangen .

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Jacques, G., Hoernle, K. , Gill, J. and Wehrmann, H. (2014) Isotopic compositions of volcanic arc rocks in the Southern Volcanic Zone (33°-43°S), Chile: along- and across-arc variations. [Poster] In: EGU General Assembly 2014. , 27.04.-02.05.2014, Vienna, Austria .

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Wehrmann, H., Hoernle, K. , Jacques, G., Garbe-Schönberg, D., Trumbull, R. and Wiedenbeck, M. (2014) Variations of water, sulphur, and chlorine in mafic to intermediate tephras along the Chilean Southern Volcanic Zone. [Poster] In: EGU General Assembly 2014. , 27.04.-02.05.2014, Vienna, Austria .

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Jacques, G., Hoernle, K. A. , Gill, J., Hauff, F. , Wehrmann, H., Garbe-Schönberg, D., van den Bogaard, P., Bindeman, I. and Lara, L. E. (2013) Across-arc geochemical variations in the Southern Volcanic Zone, Chile (34.5- 38.0°S): Constraints on Mantle Wedge and Slab Input Compositions. Open Access Geochimica et Cosmochimica Acta, 123 . pp. 218-243. DOI 10.1016/j.gca.2013.05.016.


Hoernle, K. , Jacques, G. and Wehrmann, H. (2013) Causes of along- an across-arc geochemical variations in the Southern Volcanic Zone . [Talk] In: Universidad de Buenos Aires. , November 2013, Buenos Aires, Argentina .


Jacques, G., Hoernle, K. , Wehrmann, H., Gill, J. and Bindeman, I. (2013) Geochemical variations in the Central Southern Volcanic Zone, Chile (38-43°S): The role of fluids in generating arc magmas. [Poster] In: Goldschmidt Conference 2013. , 25.-30.08.2013, Florence, Italy .

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Kutterolf, S. , Hansteen, T. H. , Appel, K., Freundt, A. , Krüger, K., Perez, W. and Wehrmann, H. (2013) Combined bromine and chlorine release from large explosive volcanic eruptions: A threat to stratospheric ozone?. Geology, 41 (6). pp. 707-710. DOI 10.1130/G34044.1.


Wehrmann, H., Dzierma, Y., Kutterolf, S. and Schaller, T. (2013) The probability of future plinian eruptions at the Central American Volcanic Arc: a statistical time series analysis. [Poster] In: 73. Jahrestagung der Deutschen Geophysikalischen Gesellschaft. , 04.-07.03.2013, Leipzig, Germany .

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Dzierma, Y., Rabbel, W., Thorwart, M., Koulakov, I., Wehrmann, H., Hoernle, K. and Comte, D. (2012) Seismic velocity structure of the slab and continental plate in the region of the 1960 Valdivia (Chile) slip maximum - insights into fluid release and plate coupling. Earth and Planetary Science Letters, 331-332 . pp. 164-176. DOI 10.1016/j.epsl.2012.02.006.


Hoernle, K. , Wehrmann, H., Jacques, G., Rivera, R. and Gill, J. (2012) Phreatomagmatic volcanism in the area of Cerro Azul, 35.7°S, Southern Volcanic Zone, Chile: La Resolana and Los Hornitos Cinder Cones and Maars. [Poster] In: Hopi Buttes Volcanic Field Workshop: Interpreting Maar-Diatreme Volcanism using base to top exposures, syn-eruptive surface deposits and country-rock strata. , 21.10.-27.10.2012, Flagstaff, Arizona, USA .


Jacques, G., Hoernle, K. A. , Wehrmann, H., Garbe-Schönberg, D., van den Bogaard, P., Hauff, F. , Mahlke, J., Schumann, K., Bindeman, I. and Lara, L. E. (2012) Along- and across-arc geochemical variations in the Southern Volcanic Zone, Chile. [Poster] In: The Lübeck Retreat, Collaborative Research SFB 574 Volatiles and Fluids in Subduction Zones: Climate Feedback and Trigger Mechanisms for Natural Disasters. , 23.05.-25.05.2012, Lübeck . The Lübeck Retreat: final colloquium of SFB 574; May 23-25, 2012: program & abstracts. ; pp. 13-14 .

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Jacques, G., Hoernle, K. , Hauff, F. , Wehrmann, H., Gill, J., Garbe-Schönberg, D., van den Bogaard, P., Bindeman, I. and Lara, L. E. (2012) Across-arc geochemical variations in the Southern Volcanic Zone, Chile (34.5- 38.0°S): Constraints on Mantle Wedge and Input Compositions. [Poster] In: AGU Fall Meeting 2012. , 03.-07.12.2012, San Francisco, USA .


Krüger, K., Kutterolf, S. , Hansteen, T. , Appel, K., Freundt, A. , Perez, W. and Wehrmann, H. (2012) The combined bromine and chlorine release from large explosive volcanic eruptions: a threat to stratospheric ozone. [Talk] In: AGU Chapman Conference on Volcanism and the Atmosphere. , 10.-15.06.2012, Selfoss, Iceland .


Kutterolf, S. , Hansteen, T. , Appel, K., Freundt, A. , Krüger, K., Peréz Fern´andez, W. and Wehrmann, H. (2012) Bromine in Plininan eruptions: A paleo-ozone killer?. [Talk] In: The Lübeck Retreat, Collaborative Research SFB 574 Volatiles and Fluids in Subduction Zones: Climate Feedback and Trigger Mechanisms for Natural Disasters. , 23.-25.05.2012, Lübeck . The Lübeck Retreat: final colloquium of SFB 574; May 23-25, 2012: program & abstracts. ; p. 16 .


Kutterolf, S. , Heydolph, K., Freundt, A. , Hoernle, K. , Hauff, F. , Perez, W., Wehrmann, H., Garbe-Schönberg, D. and Schmincke, H. U. (2012) Comparing felsic and mafic volcanics along Central America with implications for interaction with continental crust. [Poster] In: Goldschmidt Conference 2012. , 24.-29.06.2012, Montreal, Canada .

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Rabbel, W., Dzierma, Y., Thorwart, M., Wunderlich, T., Koulakov, I., Hoernle, K. and Wehrmann, H. (2012) Seismic evidence of a link between subducted oceanic faults and volcanism: A case study from South Central Chile. [Poster] In: EGU General Assembly 2012. , 22.-27.04.2012, Vienna, Austria .


Rabbel, W., Dzierma, Y., Thorwart, M., Wunderlich, T., Koulakov, I., Hoernle, K. and Wehrmann, H. (2012) From the Valdivia Fracture Zone to the Villarrica volcanic complex - seismic evidence of a link between subducted oceanic faults and volcanism. [Poster] In: The Lübeck Retreat, Collaborative Research SFB 574 Volatiles and Fluids in Subduction Zones: Climate Feedback and Trigger Mechanisms for Natural Disasters. , 23.-25.05.2012, Lübeck . The Lübeck Retreat: final colloquium of SFB 574; May 23-25, 2012: program & abstracts. ; p. 25 .


Rabbel, W., Dzierma, Y., Thorwart, M., Wunderlich, T., Koulakov, I., Hoernle, K. and Wehrmann, H. (2012) From the Valdivia Fracture Zone to the Villarrica volcanic complex - seismic evidence of a link between subducted oceanic faults and volcanism. [Talk] In: The Lübeck Retreat, Collaborative Research SFB 574 Volatiles and Fluids in Subduction Zones: Climate Feedback and Trigger Mechanisms for Natural Disasters. , 23.-25.05.2012, Lübeck . The Lübeck Retreat: final colloquium of SFB 574; May 23-25, 2012: program & abstracts. ; p. 25 .


Rivera, R., Wehrmann, H. and Hoernle, K. (2012) Variations of S and Cl from melt inclusions of tephras across the Andean Arc, between 34°21’ and 37° 17’ S, Southern Volcanic Zone. [Talk] In: 13. Congreso Geologico Chileno. , 05.-09.08.2012, Antofagasta, Chile .


Wehrmann, H., Dzierma, Y., Kutterolf, S. and Schaller, T. (2012) On the probability of future plinian eruptions at the Central American Volcanic Arc: a statistical time series analysis. [Talk] In: The Lübeck Retreat, Collaborative Research SFB 574 Volatiles and Fluids in Subduction Zones: Climate Feedback and Trigger Mechanisms for Natural Disasters. , 23.-25.05.2012, Lübeck . The Lübeck Retreat: final colloquium of SFB 574; May 23-25, 2012: program & abstracts. ; pp. 36-37 .


Wehrmann, H., Dzierma, Y., Kutterolf, S. and Schaller, T. (2012) The probability of future plinian eruptions at the Central American Volcanic Arc: a statistical time series analysis. [Talk] In: 8. Alexander von Humboldt International Conference, Natural Disasters, Global Change, and the Preservation of World Heritage Sites. , 12.-16.11.2012, Cusco, Peru .


Wehrmann, H., Halama, R., Garbe-Schönberg, D., Hoernle, K. , Jacques, G., Heydolph, K., Mahlke, J. and Schumann, K. (2012) On the fluid-mobility of molybdenum, tungsten, and antimony in subduction systems. [Poster] In: The Lübeck Retreat, Collaborative Research SFB 574 Volatiles and Fluids in Subduction Zones: Climate Feedback and Trigger Mechanisms for Natural Disasters. , 23.-25.05.2012, Lübeck . The Lübeck Retreat: final colloquium of SFB 574; May 23-25, 2012: program & abstracts. ; p. 37 .


Wehrmann, H., Hoernle, K. , Jacques, G., Garbe-Schönberg, D., Schumann, K., Mahlke, J. and Lara, L. (2012) Sulphur and chlorine geochemistry of mafic to intermediate tephras from the Chilean Southern Volcanic Zone (33-43°S) compared with those from the Central American Volcanic Arc. [Poster] In: The Lübeck Retreat, Collaborative Research SFB 574 Volatiles and Fluids in Subduction Zones: Climate Feedback and Trigger Mechanisms for Natural Disasters. , 23.-25.05.2012, Lübeck . The Lübeck Retreat: final colloquium of SFB 574; May 23-25, 2012: program & abstracts. ; pp. 37-38 .

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Hoernle, K. , Jacques, G., Wehrmann, H., Dzierma, Y., Garbe-Schönberg, D., van den Bogaard, P., Lara, L., Völker, D., Kutterolf, S. and Iyer, K. (2011) Geochemical, Geophysical and Morphological Results from the Chilean Southern Volcanic Zone: The Role of Fluids in Generating the Highest Magmatic Output. [Talk] In: AGU Fall Meeting 2011. , 05.-09.12.2011, San Francisco, USA .

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Jacques, G., Hoernle, K. , Wehrmann, H., Garbe-Schönberg, D., van den Bogaard, P., Hauff, F. and Lara, L. (2011) Along-Arc geochemical variations in the Southern Volcanic Zone, Chile. [Talk] In: Goldschmidt Conference 2011. , 14.-19.08.2011, Prague, Czech Republic ; p. 1096 . Mineralogical Magazine, 75,3 .

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Völker, D., Kutterolf, S. and Wehrmann, H. (2011) Comparative mass balance of volcanic edifices at the Southern Volcanic Zone of the Andes between 33°S and 46°S. Journal of Volcanology and Geothermal Research, 205 . pp. 114-129. DOI 10.1016/j.jvolgeores.2011.03.011.

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Wehrmann, H., Halama, R., Garbe-Schönberg, D., Hoernle, K. , Jacques, G., Heydolph, K., Mahlke, J. and Schumann, K. (2011) On the fluid-mobility of molybdenum, tungsten, and antimony in subduction systems. [Poster] In: Goldschmidt Conference 2011. , 14.-19.08.2011, Prague, Czech Republic ; p. 2140 . Mineralogical Magazine, 75,3 .

Wehrmann, H., Hoernle, K. , Portnyagin, M. , Wiedenbeck, M. and Heydolph, K. (2011) Volcanic CO2 output at the Central American subduction zone inferred from melt inclusions in olivine crystals from mafic tephras. Open Access Geochemistry, Geophysics, Geosystems, 12 . Q06003. DOI 10.1029/2010GC003412.

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Jacques, G., Hoernle, K. , Wehrmann, H., Garbe-Schönberg, C. D., van den Bogaard, P., Hauff, F. and Lara, L. (2010) Along- and Across-Arc Variations in the Southern Volcanic Zone, Chile. [Talk] In: 88. Jahrestagung der Deutschen Mineralogischen Gesellschaft, DMG, From Dust to Dust. , 19.09.-22.09.2010, Münster . From Dust to Dust : 88. Jahrestagung der Deutschen Mineralogischen Gesellschaft, DMG ; Abstracts. ; 122, S09-T08 .


Dzierma, Y. and Wehrmann, H. (2010) Young volcanoes in the Chilean Southern Volcanic Zone: A statistical approach to eruption prediction based on time series. [Poster] In: 6th Alexander von Humboldt International Conference on Climate Change, Natural Hazards, and Societies. , 14.-19.03.2010, Merida, Mexico .


Dzierma, Y. and Wehrmann, H. (2010) Eruption time series statistically examined: Probabilities of future eruptions in the Chilean Southern Volcanic Zone. [Talk] In: SFB 574 Subduction Workshop. , 04.-07.11.2010, Pucon, Chile .


Frische, M., Fietzke, J. , Wehrmann, H., Hansteen, T. and Kutterolf, S. (2010) High-precision determination of stable chlorine isotopes: Insights into recycling processes beneath volcanic arcs. [Talk] In: SFB 574 Subduction Workshop. , 04.-07.11.2010, Pucon, Chile .


Hansteen, T. , Kutterolf, S. , Appel, K., Freundt, A. , Perez, W. and Wehrmann, H. (2010) Bromine release during Plinian eruptions along the Central American Volcanic Arc. [Talk] In: AGU Fall Meeting 2010. , 13.-17.12.2010, San Francisco, USA .


Jacques, G., Hoernle, K. A. , Wehrmann, H., Garbe-Schönberg, D., van den Bogaard, P., Hauff, F. and Lara, L. (2010) Along- and Across-Arc Variations in the Southern Volcanic Zone, Chile. [Talk] In: SFB 574 Subduction Workshop. , 04.-07.11.2010, Pucon, Chile .


Kutterolf, S. , Hansteen, T. , Appel, K., Freundt, A. , Perez, W. and Wehrmann, H. (2010) Bromine release during Plinian eruptions along the Central American Volcanic Arc. [Talk] In: SFB 574 Subduction Workshop. , 04.-07.11.2010, Pucon, Chile .


Kutterolf, S. , Hansteen, T. , Rickers-Appel, K., Freundt, A. , Perez, W., Wehrmann, H. and Frische, M. (2010) Magmatic heavy halogen concentrations and degassed masses in late Pleistocene to Holocene Plinian eruptions of Nicaragua. [Talk] In: European Geosciences Union General Assembly. , 02.-07.05.2010, Vienna, Austria .


Wehrmann, H., Garbe-Schönberg, C. D., Jacques, G., Hoernle, K. , Mahlke, J. and Schumann, K. (2010) Tephras from the Southern Chilean-Argentinian subduction system: high-resolution trace element analyses by LA-ICP-MS. [Poster] In: 10th European Workshop on Laser Ablation. , 29.06.-01.07.2010, Kiel, Germany .


Wehrmann, H., Garbe-Schönberg, D., Hoernle, K. , Jacques, G., Mahlke, J., Schumann, K. and van den Bogaard, P. (2010) On the fluid-mobility of molybdenum and tungsten in subduction zone volcanics: a comparative study of the Chilean Southern Volcanic Zone and the Central American Volcanic Arc. [Poster] In: SFB 574 Subduction Workshop. , 04.-07.11.2010, Pucon, Chile .

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Costantini, L., Bonadonna, C., Houghton, B. F. and Wehrmann, H. (2009) New physical characterization of the Fontana Lapilli basaltic Plinian eruption, Nicaragua. Open Access Bulletin of Volcanology, 71 (3). pp. 337-355. DOI 10.1007/s00445-008-0227-9.


Hansteen, T. , Kutterolf, S. , Freundt, A. , Frische, M., Wehrmann, H., Schmincke, H. U. and Horn, S. (2009) Stratospheric input of heavy halogens (Br, I) from large explosive eruptions: Information from melt inclusions. [Talk] In: Goldschmidt Conference 2009. , 21.-26.06.2009, Davos, Switzerland ; A493 . Geochimica et Cosmochimica Acta, 73 .


Schumann, K., Wehrmann, H. and Friese, K. (2009) Geochemical investigation of the three volcanoes, Casablanca, Osorno and Cabeza de Vaca, Southern Volcanic Zone, Chile. [Poster] In: 87. Tagung der Deutschen Mineralogischen Gesellschaft. , 13.-16.09., Halle .


Völker, D., Kutterolf, S. and Wehrmann, H. (2009) The Southern Volcanic Zone of Chile: calculations of Holocene and Pleistocene volcano volumes and relations between volume distribution and subduction parameters. [Poster] In: Lateinamerika-Kolloquium 2009. , 06.04.-09.04, Göttingen .


Hansteen, T. , Kutterolf, S. , Freundt, A. , Frische, M., Wehrmann, H., Schmincke, H. U. and Kluegel, A. (2008) Heavy Halogen (Br, I) Injections into the Stratosphere from Large Explosive Volcanic Eruptions: Information from Melt Inclusions. [Poster] In: AGU International Meeting 2008. , 15.-19.12.2008, San Francisco, USA .

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Kutterolf, S. , Freundt, A. , Perez, W., Mörz, T., Schacht, U., Wehrmann, H. and Schmincke, H. U. (2008) Pacific offshore record of plinian arc volcanism in Central America: 1. Along-arc correlations. Open Access Geochemistry, Geophysics, Geosystems, 9 (Q02S01). DOI 10.1029/2007GC001631.


Kutterolf, S. , Freundt, A. , Perez, W., Wehrmann, H. and Schmincke, H. U. (2008) Mafic Plinian eruptions: A common phenomenon at the Central American volcanic arc. [Talk] In: IAVCEI International Meeting. , 18.-22.08, Reykjavik, Iceland .


Kutterolf, S. , Völker, D., Wehrmann, H. and Hansteen, T. (2008) Volume Distribution of Volcanic Edifices at the Southern Volcanic Zone of the Andes Between 33°S and 46°S. [Poster] In: AGU Fall Meeting 2008. , 15.-19.12.2008, San Francisco, USA .


Völker, D., Kutterolf, S. and Wehrmann, H. (2008) Comparative mass balance of volcanic edifices at the Southern Volcanic Zone of the Andes between 33°S and 46°S. [Poster] In: 4th EGU Alexander von Humboldt International Conference - The Andes: Challenge for Geosciences. , 24.-28.11, Santiago de Chile, Chile .


Wehrmann, H., Hoernle, K. , Portnyagin, M. , Wiedenbeck, M., Heydolph, K. and van den Bogaard, P. (2008) CO2-turnover at the Central American subduction zone - insights from melt inclusions in mafic tephras. [Other] In: IAVCEI General Assembly. , 18.08.-25.08, Reykjavik, Iceland .


Wehrmann, H., Kutterolf, S. , Hoernle, K. , Freundt, A. , Portnyagin, M. and Heydolph, K. (2008) Continental subduction settings: reduced volatile transport of Cl and S to the surface?. [Poster] In: AGU Fall Meeting 2008. , 15.-19.12.2008, San Francisco, USA .


Freundt, A. , Kutterolf, S. , Perez, W., Wehrmann, H. and Schmincke, H. U. (2007) Magma production rates along the Central American Volcanic Arc. [Talk] In: 97th Annual Meeting of the Geologische Vereinigung (GV) - The Oceans in the Earth System, International Conference 2007. , 03.-05.10, Bremen .


Freundt, A. , Kutterolf, S. , Perez, W., Wehrmann, H. and Schmincke, H. U. (2007) CAVA magma production rates and volcanic hazards: Some aspects based on widespread tephras. [Talk] In: US-MARGINS/SFB574 Workshop. , 18.-22.06, San Jose, Costa Rica .


Hoernle, K. , Portnyagin, M., Wehrmann, H., Heydolph, K., Kutterolf, S. , Freundt, A. , Abt, D., Fischer, K., Grevemeyer, I. , Ivandic, M., Rabbel, W., Thorwart, M. and Dinc-Akdogan, N. (2007) An overview of Volatile and Isotopic variations along the Central American Volcanic Front. [Invited talk] In: AGU Fall Meeting 2007. , 10.-14.12, San Francisco, USA .

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Kutterolf, S. , Freundt, A. , Perez, W., Wehrmann, H. and Schmincke, H. U. (2007) Late Pleistocene to Holocene temporal succession and magnitudes of highly-explosive volcanic eruptions in west-central Nicaragua. Journal of Volcanology and Geothermal Research, 163 . pp. 55-82. DOI 10.1016/j.jvolgeores.2007.02.006.


Kutterolf, S. , Schacht, U., Wehrmann, H., Freundt, A. and Mörz, T. (2007) Onshore to offshore tephrostratigraphy and marine ash layer diagenesis in Central America. In: Central America: geology, resources, hazards. ; 1 , ed. by Bundschuh, J. and Alvarado Induni, G. E.. Taylor & Francis, London, pp. 395-421. ISBN 978-0-415-41648-1


Perez, W., Kutterolf, S. , Freundt, A. , Wehrmann, H. and Schmincke, H. U. (2007) CAVA magma production rates and volcanic hazards: Some aspects based on widespread tephras. [Talk] In: Workshop to Integrate Subduction Factory and Seismogenic Zone Studies in Central America. , 18.- 22.06, Heredia, Costa Rica .


Wehrmann, H., Freundt, A. and Kutterolf, S. (2007) Exsolution of magmatic volatiles governing unususal eruptions: constraints on fragmentation and eruptive style of the mafic plinian Fontana eruption, Nicaragua. [Poster] In: SubFac-SEIZE Workshop. , 18.-22.06, Heredia, Costa Rica .


Wehrmann, H., Freundt, A. and Kutterolf, S. (2007) Magmatic volatile degassing governing unususal eruptions: constraints on fragmentation and eruptive style of the mafic plinian Fontana eruption, Nicaragua. [Poster] In: 97th Annual Meeting of the Geologische Vereinigung (GV) - The Oceans in the Earth System, International Conference 2007. , 01.-05.10, Bremen .


Freundt, A. , Kutterolf, S. , Schmincke, H. U. , Hansteen, T. , Wehrmann, H., Perez, W., Strauch, W. and Navarro, M. (2006) Volcanic hazards in Nicaragua: Past, present, and future. In: Volcanic hazards in Central America. , ed. by Rose, W. I., Bluth, G., Carr, M. J., Ewert, J., Patino, L. and Vallance, J.. Geological Society of America Special Paper, 412 . Geological Society of America, Boulder, Colorado, pp. 141-165. DOI 10.1130/2006.2412(08).

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Freundt, A. , Kutterolf, S. , Wehrmann, H., Schmincke, H. U. and Strauch, W. (2006) Eruption of the dacite to andesite zoned Mateare Tephra, and associated tsunamis in Lake Managua, Nicaragua. Journal of Volcanology and Geothermal Research, 149 (1-2). pp. 103-123. DOI 10.1016/j.jvolgeores.2005.06.001.


Wehrmann, H., Bonadonna, C., Freundt, A. , Houghton, B. F. and Kutterolf, S. (2006) Fontana Tephra: A basaltic plinian eruption in Nicaragua. In: Volcanic hazards in Central America. , ed. by Rose, W. I., Bluth, g., Carr, M. J., Ewert, J., Patino, L. and Vallance, J.. Geological Society of America Special Paper, 412 . Geological Society of America, Boulder, Colorado, pp. 209-223.


Kutterolf, S. , Schacht, U., Freundt, A. , Wehrmann, H., Mörz, T. and Schmidt, M. (2005) Vulkanische Aschen im Pazifischen Ozean vor Nicaragua und Costa Rica – Ergebnisse der Sonne Ausfahrt SO173/3. [Poster] In: SONNE Statusseminar 2005. , 09.- 11.03.2005, Rostock-Warnemünde .


Kutterolf, S. , Schacht, U., Freundt, A. , Wehrmann, H., Mörz, T., Schmidt, M. and Schmincke, H. U. (2005) Vulkanische Aschen im pazifischen Ozean vor Nicaragua und Costa Rica - Ergebnisse der Sonne Ausfahrt SO 173/3. [Talk] In: SONNE Statusseminar. , 09.-11.03, Rostock-Warnemünde .

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Wehrmann, H. (2005) Volatile degassing and plinian eruption dynamics of the mafic Fontana Tephra, Nicaragua. (PhD/ Doctoral thesis), Christian-Albrechts-Universität, Kiel, Germany, 111 pp.


Wehrmann, H. and Freundt, A. (2005) Bromine and iodine concentrations in volcanic glasses determined by Synchrotron-XRF: origin and partitioning of heavy halogens during basaltic-andesitic and rhyolitic arc magma formation at the Central American subduction zone. [Talk] In: ECROFI XVIII (European Current Research on Fluid Inclusions) International Meeting. , 06.-09.07, Siena, Italy .


Freundt, A. , Kutterolf, S. , Wehrmann, H., Perez, W., Schmincke, H. U. and Strauch, W. (2004) Volatile masses put into the stratosphere by arc-volcano plinian eruptions: Along-term record from Nicaragua. [Talk] In: IAVCEI Generally Assembly. , 14.-20.11, Pucon, Chile .


Freundt, A. , Kutterolf, S. , Wehrmann, H., Schmincke, H. U. and Strauch, W. (2004) Tsunami in Lake Managua, Nicaragua, triggered by a compositionally zoned plinian eruption. [Talk] In: IAVCEI Generally Assembly. , 14.-20.11, Pucon, Chile .


Kutterolf, S. , Freundt, A. , Wehrmann, H., Schmincke, H. U. and Strauch, W. (2004) Varying volatile release during dacitic Chiltepe Pumice eruption (Nicaragua): Response to compositional changes and magma mixing?. [Poster] In: IAVCEI Generally Assembly. , 14.-20.11, Pucon, Chile .


Kutterolf, S. , Schacht, U., Freundt, A. , Wehrmann, H., Mörz, T., Schmidt, M. and Schmincke, H. U. (2004) Marine Tephras offshore Nicaragua and Costa Rica - Determination of sedimentation rates, eruption volumes, marine stratigraphy. [Talk] In: IAVCEI Generally Assembly. , 14.-20.11, Pucon, Chile .


Kutterolf, S. , Schacht, U., Freundt, A. , Wehrmann, H., Mörz, T., Schmidt, M. and Schmincke, H. U. (2004) Marine Tephras offshore Nicaragua and Costa Rica – Determination of sedimentation rates, eruption volumes, marine stratigraphy. [Poster] In: IAVCEI General Assembly 2004. , 14.-20.11.2004, Pucon, Chile .


Wehrmann, H., Freundt, A. , Kutterolf, S. , Bonadonna, C., Houghton, B. F. and Schmincke, H. U. (2004) Dynamics of the basaltic Plinian Fontana eruption, Nicaragua. [Poster] In: IAVCEI Generally Assembly. , 14.-20.11, Pucon, Chile .


Freundt, A. , Wehrmann, H., Kutterolf, S. and Schmincke, H. U. (2003) Volatile injection into atmosphere from highly explosive arc-volcanoes: A ~5000 years record from Nicaragua. [Talk] In: DMG-GV-DGG-Tagung GEO2003. , 22.- 25.09.2003, Bochum, Germany .


Kutterolf, S. , Wehrmann, H., Schacht, U., Freundt, A. and Schmincke, H. U. (2003) Alteration, distribution, and correlation of ash layers in the pacific seafloor off Nicaragua with on-land tephras - Implications for Volatile release and eruption parameters. [Talk] In: IAVCEI/IUGG international meeting. , 09.-13.07.2003, Sapporo, Japan .


Wehrmann, H., Freundt, A. , Kutterolf, S. and Schmincke, H. U. (2003) Volatile release and eruption dynamics of the basaltic-andesitic Fontana Tephra, Nicaragua. [Talk] In: AGU international meeting 2003. , 08.-12.12.2003, San Francisco, USA .


Wehrmann, H., Freundt, A. , Kutterolf, S. , Schmincke, H. U. and Strauch, W. (2003) Volatile Release and Eruption Dynamics of a Basaltic Plinian Eruption From Masaya Caldera, Nicaragua. [Talk] In: AGU Fall Meeting 2003. , 08.-12.12.2003, San Francisco, USA .


Wehrmann, H., Kutterolf, S. , Freundt, A. and Schmincke, H. U. (2003) Stratigraphy and Eruption Dynamics of, and volatile release from highly explosive volcanic eruptions in central Nicaragua during the last 30 ka. [Talk] In: IUGG. , 09.- 13.07.2003, Sapporo, Japan .


Wehrmann, H., Kutterolf, S. , Freundt, A. and Schmincke, H. U. (2003) Stratigraphy and eruption dynamics of, and volatile release from, highly explosive eruptions of the Central Nicaraguan volcanic front over the last 30ka. [Talk] In: IAVCEI/IUGG international meeting. , 09.-13.07.2003, Sapporo, Japan .

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