Zobrazeno 1 - 10
of 82
pro vyhledávání: '"Frank Wilhelms"'
Publikováno v:
Applied Computing and Geosciences, Vol 23, Iss , Pp 100193- (2024)
Accurate segmentation of 3D micro CT scans is a key step in the process of analysis of the microstructure of porous materials. In polar ice core studies, the environmental effects on the firn column could be detected if the microstructure is digitize
Externí odkaz:
https://doaj.org/article/e03c0cd5691f4696b9da9391e248f510
Autor:
Daniela Jansen, Steven Franke, Catherine C. Bauer, Tobias Binder, Dorthe Dahl-Jensen, Jan Eichler, Olaf Eisen, Yuanbang Hu, Johanna Kerch, Maria-Gema Llorens, Heinrich Miller, Niklas Neckel, John Paden, Tamara de Riese, Till Sachau, Nicolas Stoll, Ilka Weikusat, Frank Wilhelms, Yu Zhang, Paul D. Bons
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-12 (2024)
Abstract Only a few localised ice streams drain most of the ice from the Greenland Ice Sheet. Thus, understanding ice stream behaviour and its temporal variability is crucially important to predict future sea-level change. The interior trunk of the 7
Externí odkaz:
https://doaj.org/article/b9fee28e06734e99a011c16d4228042e
Autor:
Aitana Llorenç-Vicedo, Monica Lluesma Gomez, Ole Zeising, Thomas Kleiner, Johannes Freitag, Francisco Martinez-Hernandez, Frank Wilhelms, Manuel Martinez-Garcia
Publikováno v:
mSphere, Vol 9, Iss 5 (2024)
ABSTRACT The signs of climate change are undeniable, and the impact of these changes on ecosystem function heavily depends on the response of microbes that underpin the food web. Antarctic ice shelf is a massive mass of floating ice that extends from
Externí odkaz:
https://doaj.org/article/9f967d9d3111465a92bd1848137a7e90
Publikováno v:
Annals of Glaciology, Vol 64, Pp 63-66 (2023)
Deciphering the localisation of solid and dissolved impurities on the micron-scale in glacial ice remains a challenge, but is critical to understand the integrity of ice core records and internal deformation. Here we report on the state-of-the-art in
Externí odkaz:
https://doaj.org/article/b12660223c89451a992b36aa658c9ecd
Autor:
Ilaria Crotti, Aurélien Quiquet, Amaelle Landais, Barbara Stenni, David J. Wilson, Mirko Severi, Robert Mulvaney, Frank Wilhelms, Carlo Barbante, Massimo Frezzotti
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-11 (2022)
Crotti et al. reconstructed the dynamics of the Wilkes Subglacial Basin (Antarctica) during the past 350,000 years. Their study reveals that a portion of the East Antarctic ice sheet experienced an extensive retreat 330,000 years ago.
Externí odkaz:
https://doaj.org/article/d4f0afb6e6e042e2a36c595c1de7fd59
Autor:
Seyedhamidreza Mojtabavi, Olaf Eisen, Steven Franke, Daniela Jansen, Daniel Steinhage, John Paden, Dorthe Dahl-Jensen, Ilka Weikusat, Jan Eichler, Frank Wilhelms
Publikováno v:
Journal of Glaciology, Vol 68, Pp 799-811 (2022)
During the past 20 years, multi-channel radar emerged as a key tool for deciphering an ice sheet's internal architecture. To assign ages to radar reflections and connect them over large areas in the ice sheet, the layer genesis has to be understood o
Externí odkaz:
https://doaj.org/article/3c7f436ec5da43ccb41fea72d2e50157
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:
Remi Dallmayr, Johannes Freitag, Maria Hörhold, Thomas Laepple, Johannes Lemburg, Damiano Della-Lunga, Frank Wilhelms
Publikováno v:
Journal of Glaciology, Vol 67, Pp 84-90 (2021)
The validity of any glaciological paleo proxy used to interpret climate records is based on the level of understanding of their transfer from the atmosphere into the ice sheet and their recording in the snowpack. Large spatial noise in snow propertie
Externí odkaz:
https://doaj.org/article/a56a590acc1444d08f55741bedb7a399
Autor:
Ilaria Crotti, Aurélien Quiquet, Amaelle Landais, Barbara Stenni, David J. Wilson, Mirko Severi, Robert Mulvaney, Frank Wilhelms, Carlo Barbante, Massimo Frezzotti
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-1 (2022)
Externí odkaz:
https://doaj.org/article/355ea22ecf8842fca328d429a69fa252
Autor:
Jan Eichler, Christian Weikusat, Anna Wegner, Birthe Twarloh, Melanie Behrens, Hubertus Fischer, Maria Hörhold, Daniela Jansen, Sepp Kipfstuhl, Urs Ruth, Frank Wilhelms, Ilka Weikusat
Publikováno v:
Frontiers in Earth Science, Vol 7 (2019)
Impurities in polar ice cores have been studied so far mainly for the purpose of reconstructions of past atmospheric aerosol concentrations. However, impurities also critically influence physical properties of the ice matrix itself. To improve the da
Externí odkaz:
https://doaj.org/article/f257858de90249808a69c63e8418c424