Zobrazeno 1 - 10
of 304
pro vyhledávání: '"MARCUS CHRISTL"'
Autor:
Beda A. Hofmann, Naki Akçar, Sönke Szidat, Pierre G. Valla, Marcus Christl, Christoph Vockenhuber, the Twannberg Search Team
Publikováno v:
Swiss Journal of Geosciences, Vol 116, Iss 1, Pp 1-14 (2023)
Abstract The ~ 10 km2 strewn field of the Twannberg type IIG iron meteorite is located in the Swiss Jura Mountains, 30 km northwest of Bern. The strewn field has been mapped by a group of citizen scientists since 2006, yielding more than 2000 meteori
Externí odkaz:
https://doaj.org/article/8b7a1f3d451d48d48cf00d7331d0dfb9
Autor:
Nicolas Brehm, Marcus Christl, Timothy D. J. Knowles, Emmanuelle Casanova, Richard P. Evershed, Florian Adolphi, Raimund Muscheler, Hans-Arno Synal, Florian Mekhaldi, Chiara I. Paleari, Hanns-Hubert Leuschner, Alex Bayliss, Kurt Nicolussi, Thomas Pichler, Christian Schlüchter, Charlotte L. Pearson, Matthew W. Salzer, Patrick Fonti, Daniel Nievergelt, Rashit Hantemirov, David M. Brown, Ilya Usoskin, Lukas Wacker
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-8 (2022)
Two extreme solar energetic particle events have been found by carbon isotopes measured in ancient tree rings in 7176 and 5259 BCE. The recorded ~2% increases of atmospheric 14 C for both events exceeds in amplitude of all previously observed events.
Externí odkaz:
https://doaj.org/article/15c7584107454fb6b056596eb09f847b
Publikováno v:
Swiss Journal of Geosciences, Vol 115, Iss 1, Pp 1-25 (2022)
Abstract Cut-and-fill sequences are the result of climatically or tectonically induced alternating aggradation and incision phases of a fluvial system. A recently established cosmogenic nuclide chronology of the Cover Gravels (Deckenschotter in Germa
Externí odkaz:
https://doaj.org/article/a8a562ff103643cf9ab8162a7d8b6f20
Autor:
Chiara I. Paleari, Florian Mekhaldi, Florian Adolphi, Marcus Christl, Christof Vockenhuber, Philip Gautschi, Jürg Beer, Nicolas Brehm, Tobias Erhardt, Hans-Arno Synal, Lukas Wacker, Frank Wilhelms, Raimund Muscheler
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-9 (2022)
Cosmogenic radionuclides from ice cores and tree rings indicate that an extreme solar proton event has hit Earth about 9200 years ago. Contrary to expectations, the event occurred during a quiet phase of the Sun within the 11 year solar cycle.
Externí odkaz:
https://doaj.org/article/c42e7a79de114a288a8bdb63739a39ba
Autor:
Kristina Hippe, John D. Jansen, Daniel Søndergaard Skov, Maarten Lupker, Susan Ivy-Ochs, Florian Kober, Gerold Zeilinger, José Mariano Capriles, Marcus Christl, Colin Maden, Christof Vockenhuber, David Lundbek Egholm
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-9 (2021)
The assessment of soil sustainability in prehistoric times requires comparing millennium-scale erosion rates with geological background rates. Here, the authors apply in situ cosmogenic 14C, 10Be, and 26Al to reveal rapid soil erosion on the Andean A
Externí odkaz:
https://doaj.org/article/8f0d25383aa849ae936acef1ada210b7
Autor:
Chris Tighe, Maxi Castrillejo, Marcus Christl, Claude Degueldre, Jeremy Andrew, Kirk T. Semple, Malcolm J. Joyce
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-10 (2021)
This study proposes a method to differentiate between local plutonium-based contamination in soils versus trace plutonium stemming from global dispersion in the past, such as fallout from detonation and atmospheric testing of nuclear weapons.
Externí odkaz:
https://doaj.org/article/4d06841b851648658d1ef3f3a539682b
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 22, Iss 12, Pp n/a-n/a (2021)
Abstract The eastern margin of Madagascar has a prominent relief change from the flat coastal plain to the low‐relief high plateau, characterizing a typical great escarpment topography at a passive margin. A quantification of the spatial distributi
Externí odkaz:
https://doaj.org/article/3f03aef6b32343b58ae289b8d699d3a1
Autor:
Naki Akçar, Serdar Yeşilyurt, Kristina Hippe, Marcus Christl, Christof Vockenhuber, Vural Yavuz, Burcu Özsoy
Publikováno v:
Quaternary Science Advances, Vol 2, Iss , Pp 100012- (2020)
Blue ice moraines are common supraglacial landforms in Antarctica and they are considered to record the ice volume fluctuations. In this study, we use photogrammetry and the analysis of multiple cosmogenic nuclides (10Be, 26Al, and in-situ 14C) in bo
Externí odkaz:
https://doaj.org/article/7d80b7d59b8645749d9908e178ee3104
Autor:
Catharina Dieleman, Marcus Christl, Christof Vockenhuber, Philip Gautschi, Hans Rudolf Graf, Naki Akçar
Publikováno v:
Geosciences, Vol 12, Iss 1, p 39 (2022)
Previous research suggested that the Alpine glaciers of the Northern Swiss Foreland reached their maximum extensive position during the Middle Pleistocene. Relict tills and glaciofluvial deposits, attributed to the Most Extensive Glaciation (MEG), ha
Externí odkaz:
https://doaj.org/article/4090e733aab74d0ab4354e0520df95ac
Autor:
Ulf Büntgen, Lukas Wacker, J. Diego Galván, Stephanie Arnold, Dominique Arseneault, Michael Baillie, Jürg Beer, Mauro Bernabei, Niels Bleicher, Gretel Boswijk, Achim Bräuning, Marco Carrer, Fredrik Charpentier Ljungqvist, Paolo Cherubini, Marcus Christl, Duncan A. Christie, Peter W. Clark, Edward R. Cook, Rosanne D’Arrigo, Nicole Davi, Ólafur Eggertsson, Jan Esper, Anthony M. Fowler, Ze’ev Gedalof, Fabio Gennaretti, Jussi Grießinger, Henri Grissino-Mayer, Håkan Grudd, Björn E. Gunnarson, Rashit Hantemirov, Franz Herzig, Amy Hessl, Karl-Uwe Heussner, A. J. Timothy Jull, Vladimir Kukarskih, Alexander Kirdyanov, Tomáš Kolář, Paul J. Krusic, Tomáš Kyncl, Antonio Lara, Carlos LeQuesne, Hans W. Linderholm, Neil J. Loader, Brian Luckman, Fusa Miyake, Vladimir S. Myglan, Kurt Nicolussi, Clive Oppenheimer, Jonathan Palmer, Irina Panyushkina, Neil Pederson, Michal Rybníček, Fritz H. Schweingruber, Andrea Seim, Michael Sigl, Olga Churakova (Sidorova), James H. Speer, Hans-Arno Synal, Willy Tegel, Kerstin Treydte, Ricardo Villalba, Greg Wiles, Rob Wilson, Lawrence J. Winship, Jan Wunder, Bao Yang, Giles H. F. Young
Publikováno v:
Nature Communications, Vol 9, Iss 1, Pp 1-7 (2018)
Despite their extensive use, the absolute dating of tree-ring chronologies has not hitherto been independently validated at the global scale. Here, the identification of distinct 14C excursions in 484 individual tree rings, enable the authors to conf
Externí odkaz:
https://doaj.org/article/174d15bf117e45cfaff7841cf38f044d