Items where Author is "Sommer, Stefan"

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Number of items: 142.

Articles in a Scientific Journal - peer-reviewed

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Hall, P. O. J., Almroth Rosell, E., Bonaglia, S., Dale, A. W., Hylén, A., Kononets, M., Nilsson, M., Sommer, S., van de Velde, S. and Viktorsson, L. (2017) Influence of Natural Oxygenation of Baltic Proper Deep Water on Benthic Recycling and Removal of Phosphorus, Nitrogen, Silicon and Carbon. Frontiers in Marine Science, 4 (27). DOI 10.3389/fmars.2017.00027.

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Yücel, M., Sommer, S., Dale, A. W. and Pfannkuche, O. (2017) Microbial Sulfide Filter along a Benthic Redox Gradient in the Eastern Gotland Basin, Baltic Sea. Frontiers in Microbiology, 8 (169). DOI 10.3389/fmicb.2017.00169.

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Sommer, S., Clemens, D., Yücel, M., Pfannkuche, O., Hall, P. O. J., Almroth-Rosell, E., Schulz-Vogt, H. N. and Dale, A. W. (2017) Major Bottom Water Ventilation Events Do Not Significantly Reduce Basin-Wide Benthic N and P Release in the Eastern Gotland Basin (Baltic Sea). Frontiers in Marine Science, 4 (18). DOI 10.3389/fmars.2017.00018.

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Steinle, L., Schmidt, M., Bryant, L. D., Haeckel, M., Linke, P., Sommer, S., Zopfi, J., Lehmann, M. F., Treude, T. and Niemann, H. (2016) Linked sediment and water-column methanotrophy at a man-made gas blowout in the North Sea: Implications for methane budgeting in seasonally stratified shallow seas. Limnology and Oceanography, 61 (S1). S367-S386. DOI 10.1002/lno.10388 .

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Ehlert, C., Doering, K., Wallmann, K., Scholz, F., Sommer, S., Grasse, P., Geilert, S. and Frank, M. (2016) Stable silicon isotope signatures of marine pore waters – Biogenic opal dissolution versus authigenic clay mineral formation. Geochimica et Cosmochimica Acta, 191 . pp. 102-117. DOI 10.1016/j.gca.2016.07.022.

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Scholz, F., Löscher, C. R., Fiskal, A., Sommer, S., Hensen, C., Lomnitz, U., Wuttig, K., Göttlicher, J., Kossel, E., Steininger, R. and Canfield, D. E. (2016) Nitrate-dependent iron oxidation limits iron transport in anoxic ocean regions. Earth and Planetary Science Letters, 454 . pp. 272-281. DOI 10.1016/j.epsl.2016.09.025.

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Gier, J., Sommer, S., Löscher, C. R., Dale, A. W., Schmitz-Streit, R. and Treude, T. (2016) Nitrogen fixation in sediments along a depth transect through the Peruvian oxygen minimum zone. Biogeosciences (BG), 13 . pp. 4065-4080. DOI 10.5194/bg-13-4065-2016.

Dale, A. W., Sommer, S., Lomnitz, U., Bourbonnais, A. and Wallmann, K. (2016) Biological nitrate transport in sediments on the Peruvian margin mitigates benthic sulfide emissions and drives pelagic N loss during stagnation events. Deep Sea Research Part I: Oceanographic Research Papers, 112 . pp. 123-136. DOI 10.1016/j.dsr.2016.02.013.

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Sokoll, S., Lavik, G., Sommer, S., Goldhammer, T., Kuypers, M. M. M. and Holtappels, M. (2016) Extensive nitrogen loss from permeable sediments off North-West Africa. Journal of Geophysical Research: Biogeosciences, 121 (4). pp. 1144-1157. DOI 10.1002/2015JG003298.

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Erdem, Z., Schönfeld, J., Glock, N., Dengler, M., Mosch, T., Sommer, S., Elger, J. and Eisenhauer, A. (2016) Peruvian sediments as recorders of an evolving hiatus for the last 22 thousand years. Quaternary Science Reviews, 137 . pp. 1-14. DOI 10.1016/j.quascirev.2016.01.029.

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Rovelli, L., Dengler, M., Schmidt, M., Sommer, S., Linke, P. and McGinnis, D. (2016) Thermocline mixing and vertical oxygen fluxes in the stratified central North Sea. Biogeosciences (BG), 13 (5). pp. 1609-1620. DOI 10.5194/bg-13-1609-2016.

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Sommer, S., Gier, J., Treude, T., Lomnitz, U., Dengler, M., Cardich, J. and Dale, A. W. (2016) Depletion of oxygen, nitrate and nitrite in the Peruvian oxygen minimum zone cause an imbalance of benthic nitrogen fluxes. Deep Sea Research Part I: Oceanographic Research Papers, 112 . pp. 113-122. DOI 10.1016/j.dsr.2016.03.001.

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Lomnitz, U., Sommer, S., Dale, A. W., Löscher, C. R., Noffke, A., Wallmann, K. and Hensen, C. (2016) Benthic phosphorus cycling in the Peruvian oxygen minimum zone. Biogeosciences (BG), 13 (5). pp. 1367-1386. DOI 10.5194/bg-13-1367-2016.

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Maltby, J., Sommer, S., Dale, A. W. and Treude, T. (2016) Microbial methanogenesis in the sulfate-reducing zone of surface sediments traversing the Peruvian margin. Biogeosciences (BG), 13 (1). pp. 283-299. DOI 10.5194/bg-13-283-2016.

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Kiko, R., Hauss, H., Dengler, M., Sommer, S. and Melzner, F. (2015) The squat lobster Pleuroncodes monodon tolerates anoxic "dead zone" conditions off Peru. Marine Biology, 162 (9). pp. 1913-1921. DOI 10.1007/s00227-015-2709-6.

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Yücel, M., Beaton, A. D., Dengler, M., Mowlem, M. C., Sohl, F. and Sommer, S. (2015) Nitrate and Nitrite Variability at the Seafloor of an Oxygen Minimum Zone Revealed by a Novel Microfluidic In-Situ Chemical Sensor. PLoS ONE, 10 (7). e0132785. DOI 10.1371/journal.pone.0132785.

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Steinle, L., Graves, C. A., Treude, T., Ferré, B., Biastoch, A., Bussmann, I., Berndt, C., Krastel, S., James, R. H., Behrens, E., Böning, C. W., Greinert, J., Sapart, C. J., Scheinert, M., Sommer, S., Lehmann, A. F. and Niemann, H. (2015) Water column methanotrophy controlled by a rapid oceanographic switch. Nature Geoscience, 8 (5). pp. 378-382. DOI 10.1038/ngeo2420.

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Dale, A. W., Sommer, S., Lomnitz, U., Montes, I., Treude, T., Liebetrau, V., Gier, J., Hensen, C., Dengler, M., Stolpovsky, K., Bryant, L. D. and Wallmann, K. (2015) Organic carbon production, mineralization and preservation on the Peruvian margin. Biogeosciences (BG), 12 . pp. 1537-1559. DOI 10.5194/bg-12-1537-2015.

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Schmidt, M., Linke, P., Sommer, S., Esser, D. and Cherednichenko, S. (2015) Natural CO2 seeps offshore Panarea – A test site for subsea CO2 leak detection technology. Marine Technology Society Journal, 49 (1). pp. 19-30. DOI 10.4031/MTSJ.49.1.3.


Rovelli, L., Sommer, S., Bryant, L. D., Kriwanek, S. and Linke, P. (Submitted) Influence of variable seep sediments and bottom-water hydrodynamics on oxygen fluxes at the sediment-water interface. Journal of Geophysical Research - Oceans .

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McGinnis, D., Sommer, S., Lorke, A., Glud, R. N. and Linke, P. (2014) Quantifying tidally-driven benthic oxygen exchange across permeable sediments: An aquatic eddy correlation study. Journal of Geophysical Research - Oceans, 119 (10). pp. 6918-6932. DOI 10.1002/2014JC010303.

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Dale, A. W., Sommer, S., Ryabenko, E., Noffke, A., Bohlen, L., Wallmann, K., Stolpovsky, K., Greinert, J. and Pfannkuche, O. (2014) Benthic nitrogen fluxes and fractionation of nitrate in the Mauritanian oxygen minimum zone (Eastern Tropical North Atlantic). Geochimica et Cosmochimica Acta, 134 . pp. 234-256. DOI 10.1016/j.gca.2014.02.026.

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Friedrich, J., Janssen, F., Aleynik, D., Bange, H. W., Boltacheva, N., Çagatay, M. N., Dale, A. W., Etiope, G., Erdem, Z., Geraga, M., Gilli, A., Gomoiu, M. T., Hall, P. O. J., Hansson, D., He, Y., Holtappels, M., Kirf, M. K., Kononets, M., Konovalov, S., Lichtschlag, A., Livingstone, D. M., Marinaro, G., Mazlumyan, S., Naeher, S., North, R. P., Papatheodorou, G., Pfannkuche, O., Prien, R., Rehder, G., Schubert, C. J., Soltwedel, T., Sommer, S., Stahl, H., Stanev, E. V., Teaca, A., Tengberg, A., Waldmann, C., Wehrli, B. and Wenzhöfer, F. (2014) Investigating hypoxia in aquatic environments: diverse approaches to addressing a complex phenomenon. Biogeosciences (BG), 11 . pp. 1215-1259. DOI 10.5194/bg-11-1215-2014.

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Thurber, A. R., Levin, L. A., Rowden, A. A., Sommer, S., Linke, P. and Kröger, K. (2013) Microbes, macrofauna, and methane: a novel seep community fueled by aerobic methanotrophy . Limnology and Oceanography, 58 (5). pp. 1640-1656. DOI 10.4319/lo.2013.58.5.1640.

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Glock, N., Schönfeld, J., Eisenhauer, A., Hensen, C., Mallon, J. and Sommer, S. (2013) The role of benthic foraminifera in the benthic nitrogen cycle of the Peruvian oxygen minimum zone. Biogeosciences (BG), 10 . pp. 4767-4783. DOI 10.5194/bgd-9-17775-2012.

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Mosch, T., Sommer, S., Dengler, M., Noffke, A., Bohlen, L., Pfannkuche, O., Liebetrau, V. and Wallmann, K. J. G. (2012) Factors influencing the distribution of epibenthic megafauna across the Peruvian oxygen minimum zone. Deep Sea Research Part I: Oceanographic Research Papers, 68 . pp. 123-135. DOI 10.1016/j.dsr.2012.04.014.

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Noffke, A., Hensen, C., Sommer, S., Scholz, F., Bohlen, L., Mosch, T., Graco, M. and Wallmann, K. (2012) Benthic iron and phosphorus fluxes across the Peruvian oxigen minimum zone. Limnology and Oceanography, 57 (3). pp. 851-867. DOI 10.4319/lo.2012.57.3.0851.

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Soetaert, K., van Oevelen, D. and Sommer, S. (2012) Modelling the impact of Siboglinids on the biogeochemistry of the Captain Arutyunov mud volcano (Gulf of Cadiz). Biogeosciences (BG), 9 (12). pp. 5341-5352. DOI 10.5194/bg-9-5341-2012.

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Bohlen, L., Dale, A. W., Sommer, S., Mosch, T., Hensen, C., Noffke, A., Scholz, F. and Wallmann, K. (2011) Benthic Nitrogen Cycling Traversing the Peruvian Oxygen Minimum Zone. Geochimica et Cosmochimica Acta, 75 (20). pp. 6094-6111. DOI 10.1016/j.gca.2011.08.010.

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Dale, A. W., Sommer, S., Bohlen, L., Treude, T., Bertics, V. J., Bange, H. W., Pfannkuche, O., Schorp, T., Mattsdotter, M. E. K. and Wallmann, K. (2011) Rates and regulation of nitrogen cycling in seasonally hypoxic sediments during winter (Boknis Eck, SW Baltic Sea): Sensitivity to environmental variables. Estuarine, Coastal and Shelf Science, 95 . pp. 14-28. DOI 10.1016/j.ecss.2011.05.016.

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Glock, N., Eisenhauer, A., Milker, Y., Liebetrau, V., Schönfeld, J., Mallon, J., Sommer, S. and Hensen, C. (2011) Environmental influences on the pore density of Bolivina spissa (Cushman). Journal of Foraminiferal Research, 41 (1). pp. 22-32. DOI 10.2113/gsjfr.41.1.22.

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McGinnis, D., Cherednichenko, S., Sommer, S., Berg, P., Rovelli, L., Schwarz, R., Glud, R. N. and Linke, P. (2011) Simple, robust eddy correlation amplifier for aquatic dissolved oxygen and hydrogen sulfide flux measurements. Limnology and Oceanography: Methods, 9 . pp. 340-347. DOI 10.4319/lom.2011.9.340.

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Dale, A. W., Sommer, S., Haeckel, M., Wallmann, K., Linke, P., Wegener, G. and Pfannkuche, O. (2010) Pathways and regulation of carbon, sulfur and energy transfer in marine sediments overlying methane gas hydrates on the Opouawe Bank (New Zealand). Geochimica et Cosmochimica Acta, 74 . pp. 5763-5784. DOI 10.1016/j.gca.2010.06.038.

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Linke, P., Sommer, S., Rovelli, L. and McGinnis, D. (2010) Physical limitations of dissolved methane fluxes: The role of bottom layer processes. Marine Geology, 272 . pp. 209-222. DOI 10.1016/j.margeo.2009.03.020.

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Sommer, S., Linke, P., Pfannkuche, O., Niemann, H. and Treude, T. (2010) Benthic respiration in a novel seep habitat dominated by dense beds of ampharetid polychaetes at the Hikurangi Margin (New Zealand). Marine Geology, 272 (1/4). pp. 223-232. DOI 10.1016/j.margeo.2009.06.003.

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Sommer, S., Linke, P., Pfannkuche, O., Schleicher, T., Schneider, J., Reitz, A., Haeckel, M., Flögel, S. and Hensen, C. (2009) Seabed methane emissions and the habitat of frenulate tubeworms on the Captain Arutyunov mud volcano (Gulf of Cadiz). Marine Ecology Progress Series, 382 . pp. 69-86. DOI 10.3354/meps07956.


Sweetman, A. K., Sommer, S., Pfannkuche, O. and Witte, U. (2009) Retarded response by macrofauna-size foraminifera to phytodetritus in a deep Norwegian Fjord. Journal of Foraminiferal Research, 39 . pp. 15-22. DOI 10.2113/gsjfr.39.1.15.

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Nuzzo, M., Hornibrook, E. R. C., Hensen, C., Schneider von Deimling, J., Parkes, R. J., Rinna, J., Sommer, S., Magalhães, V. H., Reitz, A., Brückmann, W. and Pinheiro, L. M. (2008) Shallow microbial recycling of deep-sourced carbon in Gulf of Cadiz mud volcanoes. Geomicrobiology Journal, 25 (6). pp. 283-295. DOI 10.1080/01490450802258196.

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Sommer, S., Gutzmann, E. and Pfannkuche, O. (2007) Sediments hosting gas hydrates - oases for metazoan meiofauna. Marine Ecology Progress Series, 337 . pp. 27-37. DOI 10.3354/meps337027.


Sommer, S., Pfannkuche, O., Linke, P., Luff, R., Greinert, J., Drews, M., Gubsch, S., Pieper, M., Poser, M. and Viergutz, T. (2006) Efficiency of benthic filter: Biological control of the emission of dissolved methane from sediments containing shallow gas hydrates at Hydrate Ridge. Global Biogeochemical Cycles, 20 . DOI 10.1029/2004GB002389.

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Tengberg, A., Hovdenes, J., Andersson, H. J., Brocandel, O., Diaz, R., Hebert, D., Arnerich, T., Huber, C., Körtzinger, A., Khripounoff, A., Rey, F., Rönning, C., Schimanski, J., Sommer, S. and Stangelmayer, A. (2006) Evaluation of a lifetime-based optode to measure oxygen in aquatic systems. Limnology and Oceanography: Methods, 4 . pp. 7-17. DOI 10.4319/lom.2006.4.7.

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Heinz, P., Sommer, S., Pfannkuche, O. and Hemleben, C. (2005) Living benthic foraminifera in sediments influenced by gas hydrates at the Cascadia convergent margin, NE Pacific. Marine Ecology Progress Series, 304 . pp. 77-89. DOI 10.3354/meps304077.

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Sommer, S., Gutzmann, E., Ahlrichs, W. and Pfannkuche, O. (2003) Rotifers colonising sediments with shallow gas hydrates. Naturwissenschaften, 90 . pp. 273-276. DOI 10.1007/s00114-003-0423-6.

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Witte, U., Wenzhöfer, F., Sommer, S., Boetius, A., Heinz, P., Aberle, N., Sand, M., Cremer, A., Abraham, W. R., Jorgensen, B. B. and Pfannkuche, O. (2003) In situ experimental evidence of the fate of a phytodetritus pulse at the abyssal sea floor. Nature, 424 . pp. 763-765. DOI 10.1038/nature01799.


Sommer, S., Pfannkuche, O., Rickert, D. and Kähler, A. (2002) Ecological implications of surficial marine gas hydrates for the associated small-sized benthic biota at the Hydrate Ridge (Cascadia Convergent Margin, NE Pacific). Marine Ecology Progress Series, 243 . pp. 25-38.


Sommer, S., Pfannkuche, O., Rickert, D. and Kähler, A. (2002) Surficial marine gas hydrates and their ecological implications for the small-sized benthic biota at the Hydrate Ridge. Marine Ecology Progress Series, 243 . pp. 25-38.

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Pfannkuche, O., Sommer, S. and Kähler, A. (2000) Coupling between phytodetritus deposition and the small-sized benthic biota in the deep Arabian Sea: analysis of biogenic sediment compounds. Deep-Sea Research Part II-Topical Studies in Oceanography, 47 (14). pp. 2805-2833. DOI 10.1016/S0967-0645(00)00050-3.

Articles in a Scientific Journal - without review

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Augustin, N., Schmidt, M., Devey, C. W., Al-Aidaroos, A. M., Kürten, B., Eisenhauer, A., Brückmann, W., Dengler, M., van der Zwan, F. M., Feldens, P., Kwasnitschka, T., Bantan, R. A., Basaham, A., Metz, D., Hagemann, J., Al-Dhouyan, I. O., Al-Farawati, R., Al-Haj, A., Al-Nomani, S., Al-Nuwairah, M., Al-Mehana, W., Al-Sofyani, A., Al-Yousef, S., Al-Barakati, A., Audritz, S., Bauersachs, T., Bruss, G., Elgarafi, A. E., El-Sherbini, M., Haredy, R., Hissmann, K., Jamal, M., Khomayis, H. S., Kotob, A., Laurila, T., Linke, P., McGinnis, D., Orif, I. M., Pena-Garcia, D., Raddatz, J., Sas, A., Sawall, Y., Schauer, J., Sommer, S., Winder, M. and Walther, S. (2014) The Jeddah Transect Project: Extensive mapping of the Red Sea Rift. InterRidge News, 22 (November). pp. 68-73.


Bohlen, L. and Sommer, S. (2012) Enhanced recycling of bioavailable nitrogen in sediments underlying the Peruvian oxygen minimum zone. IFM-GEOMAR Annual Report, 2011 . pp. 26-27.

Book chapters


Schmidt, M., Sommer, S., Linke, P., Cherednichenko, S., Bodenbinder, A. and Bryant, L. (2012) Water column and sediment gas geochemistry. In: RV Celtic Explorer EUROFLEETS cruise report CE12010 - ECO2@NorthSea : 20.07. – 06.08.2012, Bremerhaven - Hamburg. , ed. by Linke, P.. GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, pp. 8-27. DOI 10.3289/GEOMAR_REP_NS_4_2012.


Vielstädte, L., Sommer, S., Schmidt, M., Linke, P. and Haeckel, M. (2012) Gas release experiment. In: RV Celtic Explorer EUROFLEETS cruise report CE12010 - ECO2@NorthSea : 20.07. – 06.08.2012, Bremerhaven - Hamburg. , ed. by Linke, P.. GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, pp. 28-32. DOI 10.3289/GEOMAR_REP_NS_4_2012.

Presentations

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Dengler, M., Bryant, L. D., Sommer, S., Bourbonnais, A., Dale, A. W., Krahmann, G. and Dullo, W. C. (2017) A benthic-pelagic nitrogen budget for the continental margin of the Peruvian oxygen minimum zone. [Talk] In: Good Hope for Earth Science - 2017 Joint IAPSO-IAMAS-IAGA Assembly. , 27.08.-01.09.2017, Cape Town, South Africa .


Schmidt, M., Haeckel, M., Sommer, S., Linke, P., Greinert, J. and Wallmann, K. (2016) Marine CO2 and Methane Seeps. [Talk] In: CoMet Science Workshop, DLR Institut für Physik der Atmosphäre. , 30.11.-02.12.2016, Oberpfaffenhofen, Germany .


Wenzhoefer, F., Wulff, T., Floegel, S., Sommer, S. and Waldmann, C. (2016) ROBEX - Innovative robotic technologies for ocean observations, a deep-sea demonstration mission. [Talk] In: OCEANS 2016 MTS/IEEE Monterey. , 19.-23.09.2016, Monterey, USA . DOI 10.1109/OCEANS.2016.7761215.


Dale, A., Sommer, S., Altabet, M., Bourbonnais, A., Lomnitz, U. and Wallmann, K. (2015) Biological nitrate transport and reduction in sediments in the Peruvian oxygen minimum zone. [Talk] In: ASLO Aquatic Sciences Meeting 2015. , 22.-27.02.2015, Granada, Spain .


Gier, J., Sommer, S., Löscher, C., Dale, A. W., Schmitz, R. A. and Treude, T. (2015) Nitrogen fixation in sediments along a depth transect through the Eastern Boundary Upwelling Systems off Peru and Mauritania. [Talk] In: AGU Fall Meeting 2015. , 14.-18.12.2015, San Francisco, USA .


Greinert, J., Bialas, J., Klaucke, I., Crutchley, G., Dale, A., Rowden, A., Bowden, D., Linke, P., Sommer, S., de Haas, H., de Stigter, H., Faure, K. and Liebetrau, V. (2013) Methane seepage along the Hikurangi Margin offshore New Zealand: multidisciplinary studies using R/V SONNE. [Talk] In: SONNE Statusseminar 2013. , 14.-15.02.2013, Kiel .


Haeckel, M., Wallmann, K., Schmidt, M., Liebetrau, V., Sommer, S., Schroller, D., Schönfeld, J., Karstens, J. and Berndt, C. (2013) Fluid expulsion at a 3-km long fracture system in the Northern North Sea – geochemical constraints on the origin of gas and water . [Talk] In: AGU Fall Meeting 2013. , 09.-13.12.2013, San Francisco, USA .


Linke, P., Schmidt, M., Sommer, S., Schneider von Deimling, J. and Haeckel, M. (2013) Monitoring technologies & in situ measurements at the seafloor. [Talk] In: Subsea Leak Detection Symposium. , 19.-20.11.2013, Houston, USA .


Treude, T., Bertics, V. J., Gier, J. and Sommer, S. (2013) Benthic nitrogen fixation and Mn/Fe reduction in the Mauritanian oxygen minimum zone: Two overlooked processes?. [Talk] In: Goldschmidt Conference 2013. , 25.-30.08.2013, Florence, Italy .


Vielstädte, L., Haeckel, M., Linke, P., McGinnis, D., Schmidt, M., Sommer, S. and Wallmann, K. J. G. (2013) Footprint of CO2 leaking from the seabed: insights from a gas release experiment. [Talk] In: International Workshop on Leakage effects from natural analogues. , 13.05.2013, Bergen, Norway .


Vielstädte, L., Linke, P., McGinnis, D., Sommer, S., Wallmann, K. J. G., McGinnis, D. and Haeckel, M. (2013) The footprint of CO2 leakage in the water column: Insights from numerical modeling based on a North Sea gas release experiment. [Talk] In: AGU Fall Meeting 2013. , 09.-13.12.2013, San Francisco, USA .


Vielstädte, L., Linke, P., Schmidt, M., Sommer, S., Wallmann, K., McGinnis, D. and Haeckel, M. (2013) The footprint of CO2 leakage in the water-column: Insights from numerical modeling based on a North Sea gas release experiment. [Talk] In: AGU Fall Meeting 2013. , 09.-13.12.2013, San Francisco, USA .


Dale, A. W., Bohlen, L., Noffke, A., Sommer, S., Hensen, C. and Wallmann, K. (2012) A bottom-up perspective on N nd P cycling in low oxygen environments: the Baltic Sea versus the Peruvian shelf . [Talk] In: Goldschmidt Conference 2012. , 24.-29.06.2012, Montreal, Canada .


Greinert, J., Bialas, J., Klaucke, I., Crutchley, G., Dale, A. W., Rowden, A., Bowden, D., Linke, P., Sommer, S., de Haas, H., de Stigter, H., Faure, K. and Liebetrau, V. (2012) Methane seepage along the Hikurangi Margin offshore New Zealand: 6 years of multidisciplinary studies. [Talk] In: AGU Fall Meeting 2012. , 03.-07.12.2012, San Francisco, USA .


Greinert, J., Veloso, M., Mienert, J., Sommer, S., Bussmann, I. and van Haren, H. (2012) Methane release from seeps offshore W-Svalbard: Considerations to extrapolate fluxes into the water/atmosphere. [Talk] In: EGU General Assembly 2012. , 22.-27.04.2012, Vienna, Austria .


Greinert, J., Veloso, M., Mienert, J., Sommer, S., Bussmann, I. and van Haren, H. (2012) Methane release from seeps offshore W-Svalbard: Considerations to extrapolate fluxes into the water/atmosphere. [Talk] In: Deep-Sea and Sub-Seafloor Frontier Conference. , 12-14.03.2012, Sitges, Spain .


Schmidt, M., Farawati, R., Sommer, S., Linke, P. and Botz, R. (2012) Biogeochemistry of Red Sea brine. [Talk] In: JTP Scientific Meeting. , 28.11.2012, Jeddah, Saudi Arabia .


Sommer, S., Bohlen, L., Dale, A. W., Wallmann, K., Noffke, A., Hensen, C., Mosch, T. and Pfannkuche, O. (2012) Nitrogen cycling across the Peruvian oxygen minimum zone surface sediments. [Talk] In: EGU General Assembly 2012. , 22.-27.04.2012, Vienna, Austria .

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Sommer, S., Schmidt, M. and Linke, P. (2012) Dissolved methane pluming mapping using Membrane Inlet Mass-Spectrometry (MIMS) at a blowout site in the North Sea. [Talk] In: EGU General Assembly 2012. , 22.04.-27.04.2012, Vienna, Austria . Geophysical Research Letters. ; p. 11118 .


Bertics , V. J., Sommer, S., Dale, A. W., Schmitz, R. A. and Treude, T. (2011) Nitrogen Fixation in Sediments Beneath Oxygen Minimum Zones. [Talk] In: ISEB XX 2011 Frontiers in Biogeochemistry. , 22.-27.09.2011, Istanbul, Turkey .


Bertics, V. J., Sommer, S., Dale, A. W. and Treude, T. (2011) Benthic Nitrogen and Sulfur Dynamics of Eckernförde Bay. [Talk] In: Boknis Eck Time Series Workshop. , 10.05.2011, Kiel, Germany .


Bertics, V. J., Sommer, S., Dale, A. W., Teupe, M. and Treude, T. (2011) Benthic nitrogen and sulfur dynamics of a seasonally hypoxic region of the Baltic Sea, Eckernförde Bay. [Talk] In: 2011 ASLO Aquatic Sciences Meeting. , 13.02.-18.02.2011, San Juan, Puerto Rico, USA .


Bohlen, L., Sommer, S., Dale, A. W., Hensen, C. and Wallmann, K. (2011) Sediments underlying the Peruvian oxygen minimum zone – source or sink for reactive nitrogen species?. [Talk] In: 2011 ASLO Aquatic Sciences Meeting. , 13.02.-18.02.2011, San Juan, Puerto Rico .


Noffke, A., Hensen, C., Sommer, S., Croot, P., Scholz, F. and Wallmann, K. (2011) The benthic phosphorus and iron source across the Peruvian oxygen minimum zone. [Talk] In: 2011 ASLO Aquatic Sciences Meeting. , 13.02-18.02.2011, San Juan, Puerto Rico .


Rovelli, L., Dengler, M., Schmidt, M., Sommer, S., Linke, P. and McGinnis, D. (2011) Turbulent mixing in the central North sea: sources and implications for vertical transport of dissolved gases during summertime. [Talk] In: 5. Warnemünde Turbulence Days on Turbulence and Mixing in Estuaries and Coastal Seas. , 05.09.-08.09.2011, Vilm .


Sommer, S., Schorp, T., McGinnis, D. F., Dale, A. W. and Pfannkuche, O. (2011) In situ fluxes of major nitrogen species, phosphorus, oxygen and silicate across the benthic boundary layer of the oxic to anoxic Gotland Basin (Baltic Sea). [Talk] In: 2011 ASLO Aquatic Sciences Meeting. , 13.02.-18.02.2011, San Juan, Puerto Rico .


Treude, T., Sommer, S., Pfannkuche, O., Greinert, J., Bussmann, I., Bertics, V. and Veloso, M. and PO419 Scientific Party (2011) Preliminary results from the RV Poseidon 419 expedition to the methane seepage area off West Spitzbergen, Arctic Ocean. [Talk] In: AGU Fall Meeting 2011. , 05.12.-09.12.2011, San Francisco, California, USA .


Glock, N., Eisenhauer, A., Milker, Y., Liebetrau, V., Schönfeld, J., Mallon, J., Sommer, S. and Hensen, C. (2010) Environmental Influences on the Pore Density in Bolivina spissa. [Talk] In: FORAMS 2010 - International Symposium on Foraminifera. , 05.09.-10.09.2010, Bonn .


Linke, P., Freundt, A., Geersen, J., Kutterolf, S., Liebetrau, V., Rovelli, L., Scholz, F., Sommer, S., Steeb, P., Treude, T. and Völker, D. (2010) ChiFlux - Identification and investigation of fluid flux, mass wasting and sediments in the forearc of the central Chilean subduction zone – First results from SONNE cruise SO-210. [Talk] In: SFB 574 SUBDUCTION WORKSHOP. , 04.-07.11.2010, Pucon, Chile .


Rovelli, L., Dengler, M., Schafstall, J., Schmidt, M., Sommer, S., Linke, P. and McGinnis, D. and University of Iceland (2010) Physical characterization of oxygen fluxes across the water column in the central North Sea. [Talk] In: 14th International Workshop on Physical Processes in Natural Waters (PPNW). , 28.06.-01.07.2010, Reykjavik, Iceland . Conference Proceedings / 14th International Workshop on Physical Processes in Natural Waters, Reykjavík, Iceland, June 28 to July 1, 2010 / Ed.: Hrund Ólöf Andradóttir. ; pp. 145-146 .


Schorp, T., Dale, A. W., Sommer, S., Pfannkuche, O., Hansen, H. P. and Bange, H. W. (2010) Benthic nitrogen and phosphorus fluxes in a seasonally hypoxic channel in the Western Baltic Sea (Boknis Eck, Kiel Bight): current trends and long term perspectives. [Talk] In: Uncertainties of scenario simulations. , 14.10.2010, Norrköping, Sweden .


Sommer, S., McGinnis, D. F., Linke, P., Camilli, R., Mosch, T. and Pfannkuche, O. (2010) Life at the edge - oscillating lower boundary of the Peruvian oxygen minimum zone. [Talk] In: Ocean Sciences Meeting 2010 "Oxygen Minimum Zones and Climate Change: Observations and Prediction IV". , 22.02.-26.02.2010, Portland, Oregon, USA . EOS Transactions : Ocean Sciences Meeting Supplement. ; BO24C-08 .


Linke, P., Sommer, S., Rovelli, L. and McGinnis, D. (2009) Physical controls of cold seep methane emission. [Talk] In: Seminar Series. , 18.05, Kastanienbaum, Switzerland .

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Linke, P., Sommer, S., Rovelli, L. and McGinnis, D. (2009) Physical controls of cold seep methane emission. [Talk] In: OCEANS '09 IEEE, Balancing Technology with Future Needs. , 1105..-14.05, Bremen .


McGinnis, D., Brand, A., Bryant, L. D., Lorrai, C., Rovelli, L., Berg, P., Linke, P., Sommer, S. and Wüest, A. (2009) The physics of benthic oxygen fluxes in oscillating environments. [Talk] In: Seminar Series. , 28.09, Aarhus, Denmark .


McGinnis, D., Sommer, S., Rovelli, L. and Linke, P. (2009) Ephemeral benthic methane peaks: understanding the physics of cold seep emissions. [Talk] In: Conference Physical Processes in Natural Waters. , 01.-04.09, Palermo, Italy .


Sommer, S., Linke, P., Pfannkuche, O., Niemann, H., Treude, T., Dale, A. W. and Haeckel, M. (2009) Benthic respiration and energy transfer in cold seep habitats. [Talk] In: Goldschmidt Conference 2009 "Challenges to Our Volatile Planet". , 21.-26.06.2009, Davos, Switzerland ; A1249 . Geochimica et Cosmochimica Acta, 73 (13).


Sommer, S., Linke, P., Pfannkuche, O., Niemann, H. and Treude, T. (2009) Benthische Respiration in einem neuartigen, von ampharetiden Polychaeten dominierten "cold seep" Habitat des Hikurangi Kontinentalrands (Neuseeland). [Talk] In: SONNE Statusseminar "Meeresforschung mit FS Sonne". , 12.03.-13.02, Bremerhaven .


Haeckel, M., Sommer, S. and Linke, P. (2008) Porewater geochemistry and methane fluxes of cold seeps at the Hikurangi margin, offshore New Zealand. [Other] In: EGU General Assembl. , 14.-18.04, Vienna, Austria .


Sommer, S. and Pfannkuche, O. (2008) Gasexchange system for extended in situ benthic chamber flux measurements under controlled oxygen conditions. [Invited talk] In: UNSPECIFIED. , 14.02, Gothenburg, Sweden .


Sommer, S., Linke, P., Pfannkuche, O., Bowden, D. A., Haeckel, M., Greinert, J. and Thurber, A. R. (2008) Novel cold seep habitat along the Hikurangi margin (New Zealand). [Other] In: EGU General Assembly. , 14.-18.04, Vienna, Austria .


Sommer, S., Linke, P., Pfannkuche, O., Bowden, D., Greinert, J. and Haeckel, M. (2007) High sea bed methane emission rates at Hikurangi margin (New Zealand) associated with extremely abundant ampharetid polychaetes. [Talk] In: 97th Annual Meeting of the Geologische Vereinigung (GV) - The Oceans in the Earth System, International Conference 2007. , 01.-05.10, Bremen .


Sommer, S., Linke, P., Pfannkuche, O., Bowden, D., Greinert, J. and Haeckel, M. (2007) High sea bed methane emission rates at Hikurangi margin (New Zealand) associated with extremely dense populations of ampharetid polychaetes. [Talk] In: 17th Goldschmidt Conference 2007. , 19.-24.08, Köln .


Sommer, S., Pfannkuche, O., Linke, P., Schneider, J., Reitz, A., Hensen, C. and Haeckel, M. (2007) In situ measurement of sea bed methane emission from Captain Arutyunov mud volcano (Gulf of Cadiz). [Talk] In: EGU General Assembly. , 15-20.04, Vienna, Austria .


Sommer, S. (2006) Gashydrate - Energiequelle der Zukunft oder Gefahr für das Klima. [Public Lecture] In: UNSPECIFIED. , 11, Eislingen .


Sommer, S. (2006) Gashydrate - Monster der Tiefsee. [Public Lecture] In: Veranstaltung des Deutsch-Norwegischen Studienzentrums. , 10, Kiel .


Sommer, S., Pfannkuche, O., Linke, P., Luff, R., Drews, M., Greinert, J., Heeschen, K. and Gubsch, S. (2005) The efficiency of the benthic filter - biological control of the emission of dissolved methane from sediments hosting shallow gas hydrates. [Other] In: Statusseminar 2005 Meeresforschung mit FS Sonne. , 09.-11.03, Warnemünde .


Sommer, S., Pfannkuche, O., Linke, P., Luff, R., Greinert, J., Drews, M. and Gubsch, S. (2005) The efficiency of the benthic filter - biological control of the emission of dissolved methane from sediments hosting shallow gas hydrates. [Other] In: ASLO 2005 Aquatic Sciences Meeting. , 20.-25.02, Salt Lake City, USA .


Sommer, S., Pfannkuche, O., Linke, P., Luff, R., Greinert, J., Drews, M. and Heeschen, K. (2005) The efficiency of the benthic filter - biological control of the emission of dissolved methane from sediments hosting shallow gas hydrates. [Other] In: EGU General Assembly 2005. , 24.-29.04, Vienna, Austria .

Conference posters


Bryant, L. D., Dengler, M., Sommer, S., Dale, A., Altabet, M., Bourbonnais, A. and Dullo, C. (2015) Water-column nutrient fluxes along the continental margin of the Peruvian oxygen minimum zone. [Poster] In: ASLO Aquatic Sciences Meeting 2015. , 22.-27.02.2015, Granada, Spain .

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Dengler, M., Bryan, L., Sommer, S., Bourbonnais, A., Dullo, C. and Dale, A. W. (2015) A nitrogen budget for the continental margin of the Peruvian oxygen minimum zone. [Poster] In: EGU General Assembly 2015. , 12.–17.04.2015 , Vienna, Austria .


Lomnitz, U., Sommer, S., Hensen, C., Dale, A. W. and Wallmann, K. (2014) Drivers and mechanisms for high phosphate (TPO4) release rates in the oxygen minimum zone off Peru. [Poster] In: ASLO Aquatic Sciences Meeting 2014. , 23.-28.02.2014, Honolulu, Hawaii .


Sommer, S., Dale, A. W., Gier, J., Lomnitz, U. and Dengler, M. (2014) Benthic nitrogen cycling across Peruvian oxygen minimum zone surface sediments. [Poster] In: ASLO Aquatic Sciences Meeting 2014. , 23.-28.02.2014, Honolulu, Hawaii .

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Yücel, M., Dale, A. W., Sommer, S. and Pfannkuche, O. (2014) Redox processes as revealed by voltammetry in the surface sediments of the Gotland Basin, Baltic Sea. [Poster] In: EGU General Assembly 2014. , 27.04.-02.05.2014, Vienna, Austria .

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Steinle, L., Wilfert, P., Schmidt, M., Bryant, L. D., Haeckel, M., Lehmann, M. F., Linke, P., Sommer, S., Treude, T. and Niemann, H. (2013) News from the "blowout", a man-made methane pockmark in the North Sea: chemosynthetic communities and microbial methane oxidation. [Poster] In: EGU General Assembly 2013. , 07.-12.04.2013, Vienna, Austria .


Noffke, A., Sommer, S., Dale, A. W., Bertics, V. and Pfannkuche, O. (2012) Internal nutrient loading of N and P across the benthic boundary layer of the oxic to anoxic Gotland Basin (Baltic Sea). [Poster] In: EGU General Assembly 2012. , 22.-27.04.2012, Vienna, Austria .


Bohlen, L., Sommer, S., Dale, A. W., Hensen, C. and Wallmann, K. (2010) Sediments underlying the Peruvian OMZ - sink or source for reactive N species. [Poster] In: Ocean Sciences Meeting 2010 "Nitrogen Cycling Near Oxygen Minima Zones: Linking Observations to Global Models of Nitrogen Fixation in the Anthropocene". , 22.02.-26.02.2010, Portland, Oregon, USA . EOS Transactions : Ocean Sciences Meeting Supplement. ; IT15D-03 .


Mallon, J., Glock, N., Schönfeld, J. and Sommer, S. (2010) Living (Rose Bengal) stained benthic foraminifera of the Peruvian oxygen minimum zone - discovering new proxies for oxygen reconstruction. [Poster] In: Ocean Sciences Meeting 2010 "Oxygen Minimum Zones and Climate Change: Observations and Prediction IV". , 22.02.-26.02.2010, Portland, Oregon, USA .


Mosch, T., Sommer, S., Pfannkuche, O. and Wallmann, K. (2010) Habitat mapping in the Peruvian OMZ. [Poster] In: Ocean Sciences Meeting 2010 "Oxygen Minimum Zones and Climate Change: Observations and Prediction IV". , 22.02.-26.02.2010, Portland, Oregon, USA ; BO35C-08 .


Mosch, T., Sommer, S., Pfannkuche, O. and Wallmann, K. (2010) Hapitat Mapping in the Peruvian OMZ . [Poster] In: Ocean Sciences Meeting 2010 "Oxygen Minimum Zones and Climate Change: Observations and Prediction IV". , 22.02.-26.02.2010, Portland, Oregon, USA .


Noffke, A., Hensen, C., Sommer, S., Scholz, F., Mosch, T. and Wallmann, K. (2010) Benthic fluxes of iron, phosphate and silicate across the Peruvian Oxygen Minimum Zone. [Poster] In: Ocean Sciences Meeting 2010 "Oxygen Minimum Zones and Climate Change: Observations and Prediction IV". , 22.02.-26.02.2010, Portland, Oregon, USA . EOS Transactions : Ocean Sciences Meeting Supplement. ; BO35C-09 .


Glock, N., Eisenhauer, A., Milker, Y., Liebetrau, V., Schönfeld, J., Mallon, J., Sommer, S. and Hensen, C. (2009) The Sensitivity of Pore Density in Tests of Bolivina Spissa to ambient Oxygen and Nitrate concentration. [Poster] In: GV Annual Meeting 2009. , 05.-07.10, Göttingen .


Linke, P., Sommer, S. and McGinnis, D. (2008) Physical limitations of dissolved methane fluxes: The role of bottom-boundary layer processes. [Poster] In: EGU General Assembly. , 14.-18.04, Vienna, Austria .


Krieger, K., Sommer, S., Drews, M. and Pfannkuche, O. (2007) Increased standing stocks of metazoan meiofauna in Gulf of Mexico seeps: oil or methane driven?. [Poster] In: EGU General Assembly. , 04, Vienna, Austria .


Schönfeld, J., Sommer, S., Pfannkuche, O. and Dullo, W. C. (2007) Benthic foraminifera from mud volcanoes in the Gulf of Cadiz: food and oxygen decoupled?. [Poster] In: Micropalaeontological Society's Foraminifera and Nannofossil Groups Joint Spring Meeting. , 07-08.06, Angers .

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Sommer, S., Gutzmann, E., Schnell, J. and Pfannkuche, O. (2007) Sediments hosting gas hydrates - oases for metazoan meiofauna?. [Poster] In: EGU General Assembly. , 04, Vienna, Austria .


Sommer, S., Pfannkuche, O., Linke, P., Schneider, J., Reitz, A., Hensen, C. and Haeckel, M. (2007) In situ seabed emission from Captain Arutyunov mud volcano (Gulf of Cadiz). [Poster] In: 97th Annual Meeting of the Geologische Vereinigung (GV) - The Oceans in the Earth System, International Conference 2007. , 01.-05.10, Bremen .

Reports - Cruise Reports

Reports - Weekly reports

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Sommer, S. and M137 Team (2017) 1. Wochenbericht Meteor Reise M137. . , 2 pp.

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Sommer, S. and M137 Team (2017) 2. Wochenbericht Meteor Reise M137. . , 2 pp.

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Sommer, S. and M137 Team (2017) 3. Wochenbericht Meteor Reise M137. . , 4 pp.

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Sommer, S. and M137 Team (2017) 4. Wochenbericht Meteor Reise M137. . , 3 pp.

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Sommer, S. (2014) 4. Wochenbericht M107. . , 3 pp.

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Sommer, S. (2014) 3. Wochenbericht M107. . , 3 pp.

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Sommer, S. (2014) 2. Wochenbericht M107. . , 3 pp.

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Sommer, S. (2014) 1. Wochenbericht M107. . , 2 pp.

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Sommer, S. and Das M107 Team (2014) 5. Wochenbericht M107. . , 3 pp.

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Sommer, S. (2013) 1. Wochenbericht M92. . , 2 pp.

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Sommer, S. (2013) 2. Wochenbericht M92. . , 2 pp.

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Sommer, S. (2013) 3. Wochenbericht M92. . , 2 pp.

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Sommer, S. (2013) 4. Wochenbericht M92. . , 3 pp.

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Sommer, S. (2013) 5. Wochenbericht M92. . , 2 pp.

This list was generated on Tue Dec 12 11:24:49 2017 CET.