Results 1 to 10 of about 2,979,995 (245)

A multi-millennial record of rock glacier ice chemistry (Lazaun, Italy)

Frontiers in Earth Science, 2023
Active rock glaciers—known as mixtures of unconsolidated debris with interstitial ice, ice lenses or a core of massive ice—are widespread indicators of mountain permafrost. The age of a frozen rock glacier core in the Central European Alps (Lazaun, Italy)
Ulrike Nickus, Hansjörg Thies, Karl Krainer, Kathrin Lang, Volkmar Mair, David Tonidandel   +5 more
doaj   +3 more sources

A novel laser melting sampler for discrete, sub-centimeter depth-resolved analyses of stable water isotopes in ice cores

Journal of Glaciology, 2023
We developed a novel laser melting sampler (LMS) for ice cores to measure the stable water isotope ratios (δ18O and δD) as temperature proxies at sub-centimeter depth resolutions.
Yuko Motizuki, Yoichi Nakai, Kazuya Takahashi, Junya Hirose, Yu Vin Sahoo, Masaki Yumoto, Masayuki Maruyama, Michio Sakashita, Kiwamu Kase, Satoshi Wada, Hideaki Motoyama, Yasushige Yano   +11 more
doaj   +1 more source

Prefacing unexplored archives from Central Andean surface-to-bedrock ice cores through a multifaceted investigation of regional firn and ice core glaciochemistry

Journal of Glaciology, 2023
Shallow firn cores, in addition to a near-basal ice core, were recovered in 2018 from the Quelccaya ice cap (5470 m a.s.l) in the Cordillera Vilcanota, Peru, and in 2017 from the Nevado Illimani glacier (6350 m a.s.l) in the Cordillera Real, Bolivia. The
Heather M. Clifford, Mariusz Potocki, Charles Rodda, Daniel Dixon, Sean Birkel, Michael Handley, Elena Korotkikh, Douglas Introne, Franciele Schwanck, Flavia A. Tavares, Ronaldo T. Bernardo, Filipe G. L. Lindau, Oscar Vilca Gomez, Harrison Jara-Infantes, Victor Bustínza Urviola, L. Baker Perry, Jonathan Maurer, Anton Seimon, Margit Schwikowski, Gino Casassa, Shugui Hou, Andrei V. Kurbatov, Kimberley R. Miner, Jefferson C. Simões, Paul A. Mayewski   +24 more
doaj   +1 more source

The new frontier of microstructural impurity research in polar ice

Annals of Glaciology, 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.
Nicolas Stoll, Pascal Bohleber, Remi Dallmayr, Frank Wilhelms, Carlo Barbante, Ilka Weikusat   +5 more
doaj   +1 more source

Inclusions in ice layers formed by melting and refreezing processes in a Greenland ice core

Journal of Glaciology, 2023
In recent decades, surface melting on the inland Greenland ice sheet has increased, leading to significant meltwater-refreezing in the snow and firn.
Kaoru Kawakami, Yoshinori Iizuka, Sumito Matoba, Teruo Aoki, Takuto Ando   +4 more
doaj   +1 more source

Cold cloud microphysical process rates in a global chemistry–climate model [PDF]

Atmospheric Chemistry and Physics, 2021
Microphysical processes in cold clouds which act as sources or sinks of hydrometeors below 0 ∘C control the ice crystal number concentrations (ICNCs) and in turn the cloud radiative effects.
S. Bacer, S. Bacer, S. C. Sullivan, O. Sourdeval, H. Tost, J. Lelieveld, J. Lelieveld, A. Pozzer   +7 more
doaj   +1 more source

Pan-Arctic surface ozone: modelling vs. measurements [PDF]

Atmospheric Chemistry and Physics, 2020
Within the framework of the International Arctic Systems for Observing the Atmosphere (IASOA), we report a modelling-based study on surface ozone across the Arctic. We use surface ozone from six sites – Summit (Greenland), Pallas (Finland), Barrow (USA),
X. Yang, A.-M. Blechschmidt, K. Bognar, A. McClure-Begley, A. McClure-Begley, S. Morris, S. Morris, I. Petropavlovskikh, I. Petropavlovskikh, A. Richter, H. Skov, K. Strong, D. W. Tarasick, T. Uttal, M. Vestenius, X. Zhao   +15 more
doaj   +1 more source

A new parameterization of ice heterogeneous nucleation coupled to aerosol chemistry in WRF-Chem model version 3.5.1: evaluation through ISDAC measurements [PDF]

Geoscientific Model Development, 2020
In the Arctic, during polar night and early spring, ice clouds are separated into two leading types of ice clouds (TICs): (1) TIC1 clouds characterized by a large concentration of very small crystals and TIC2 clouds characterized by a low concentration ...
S. A. Keita, E. Girard, J.-C. Raut, J.-C. Raut, M. Leriche, M. Leriche, M. Leriche, J.-P. Blanchet, J. Pelon, T. Onishi, A. Cirisan   +10 more
doaj   +1 more source

Isotopic variations of meltwater from ice by isotopic exchange between liquid water and ice

Journal of Glaciology, 2019
Predicting the isotopic modification of ice by melting processes is important for improving the accuracy in paleoclimate reconstruction. To this end, we present results from cold room laboratory observations of changes in the isotopic ratio (D/H and 18O ...
Ji-Young Ham, Soon Do Hur, Won Sang Lee, Yeongcheol Han, Hyejung Jung, Jeonghoon Lee   +5 more
doaj   +1 more source

A glaciochemical study of the 120 m ice core from Mill Island, East Antarctica [PDF]

Climate of the Past, 2017
A 120 m ice core was drilled on Mill Island, East Antarctica (65°30′ S, 100°40′ E) during the 2009/2010 Australian Antarctic field season. Contiguous discrete 5 cm samples were measured for hydrogen peroxide, water stable isotopes, and trace ion ...
M. Inoue, M. A. J. Curran, A. D. Moy, T. D. van Ommen, A. D. Fraser, H. E. Phillips, I. D. Goodwin   +6 more
doaj   +1 more source