Results 41 to 50 of about 702,524 (252)

Improved direct-count method by fluorescence microscope for low-biomass ice core

Antarctic Record, 2012
Ice cores recovered from ice sheets contain microorganisms that were transported to the surface of the ice sheet along with airborne dust. The abundance of microorganisms in ice cores, as measured by direct cell count under a fluorescence microscope, is ...
Jun Uetake, Kumiko Goto-Azuma, Hideaki Motoyama   +2 more
doaj   +1 more source

Test-Bed Performance of an Ice-Coring Drill Used with a Hot Water Drilling System

Journal of Marine Science and Engineering, 2019
Ice cores from ice shelves contain abundant paleoclimatic information and provide essential information concerned with the prediction of future climatic change and global sea level variations.
An Liu, Rusheng Wang, Xiaopeng Fan, Yang Yang, Xingchen Li, Liang Wang, Pavel Talalay   +6 more
doaj   +1 more source

Origin of englacial stratigraphy at three deep ice core sites of the Greenland Ice Sheet by synthetic radar modelling

Journal of Glaciology, 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 on a ...
Seyedhamidreza Mojtabavi, Olaf Eisen, Steven Franke, Daniela Jansen, Daniel Steinhage, John Paden, Dorthe Dahl-Jensen, Ilka Weikusat, Jan Eichler, Frank Wilhelms   +9 more
doaj   +1 more source

The Global Stratotype Section and Point (GSSP) for the base of the Holocene Series/Epoch (Quaternary System/Period) in the NGRIP ice core [PDF]

, 2008
The Greenland ice core from NorthGRIP (NGRIP) contains a proxy climate record across the Pleistocene– Holocene boundary of unprecedented clarity and resolution.
Rasmussen, Sune Olander, Hoek, Wim Z., Steffensen, Jørgen Peder, Johnsen, Sigfus Johann, Steffensen, J. P., Rasmussen, Sune Ander, Steffensen, Jorgen-Peder, Schwander, Jakob, Andrews, John, Hoek, Wim, Walker, Mike, Gibbard, Philip, Hughen, Konrad, Walker, M., Litt, T., Kershaw, P., Johnsen, Sigfus, Kershaw, Peter, Popp, T., Steffensen, Jørgen-Peder, Hughen, K., Björck, Svante, Johnsen, Sigfu's, Lowe, J., Newnham, R., Kromer, Bernd, Nakagawa, Takeshi, Lowe, D. J., Popp, Trevor James, Lowe, J. John, Schwande, J., Cwynar, L., Newnham, Rewi, Newnham, Rewi M., Rasmussen, S. O., Popp, Trevor, Hoek, W., Cwynar, Les C., Lowe, David J., Nakagawa, T., Litt, Thomas, Lowe, John, Hughen, Konrad A., Kromer, B., Johnsen, S., Gibbard, P., Andrews, J., Cwynar, Les, Bjorck, S.   +48 more
core   +2 more sources

Post-coring entrapment of modern air in some shallow ice cores collected near the firn-ice transition: evidence from CFC-12 measurements in Antarctic firn air and ice cores [PDF]

Atmospheric Chemistry and Physics, 2010
In this study, we report measurements of CFC-12 (CCl₂F₂) in firn air and in air extracted from shallow ice cores from three Antarctic sites. The firn air data are consistent with the known atmospheric history
M. Aydin, S. A. Montzka, M. O. Battle, M. B. Williams, W. J. De Bruyn, J. H. Butler, K. R. Verhulst, C. Tatum, B. K. Gun, D. A. Plotkin, B. D. Hall, E. S. Saltzman   +11 more
doaj   +1 more source

Optimization of hot-water ice-coring drills

Annals of Glaciology, 2021
Hot-water ice-coring drills are often used to recover ice core samples from desirable depths in conjunction with full-scale hot-water drilling systems. However, the recovered cores exhibit varying qualities.
An Liu, Rusheng Wang, Yang Yang, Liang Wang, Xiao Li, Yazhou Li, Pavel Talalay   +6 more
doaj   +1 more source

Three-dimensional multitrack electrical conductivity method for interpretation of complex ice core stratigraphy

Journal of Glaciology
Recent ice cores from the Allan Hills, a blue ice area in Antarctica, are nearly 3 million years old. These cores extend ice core chronologies, enabling new insight into key climate periods such as the Mid-Pleistocene Transition.
Liam Reed Kirkpatrick, Austin Joseph Carter, Julia Marks-Peterson, Sarah Shackleton, T.J. Fudge   +4 more
doaj   +1 more source

Physically Based Summer Temperature Reconstruction From Melt Layers in Ice Cores

Earth and Space Science, 2021
Previous reconstructions of summer temperatures from ice cores have relied on a statistical relationship between a melt layer and temperature observed at nearby stations. This study presents a novel method for reconstructing summer temperatures from melt
Koji Fujita, Sumito Matoba, Yoshinori Iizuka, Nozomu Takeuchi, Akane Tsushima, Yutaka Kurosaki, Teruo Aoki   +6 more
doaj   +1 more source

Continuous flow analysis methods for sodium, magnesium and calcium detection in the Skytrain ice core

Journal of Glaciology, 2022
Dissolved and particulate sodium, magnesium and calcium are analyzed in ice cores to determine past changes in sea ice extent, terrestrial dust variability and atmospheric aerosol transport efficiency.
Mackenzie M. Grieman, Helene M. Hoffmann, Jack D. Humby, Robert Mulvaney, Christoph Nehrbass-Ahles, Julius Rix, Elizabeth R. Thomas, Rebecca Tuckwell, Eric W. Wolff   +8 more
doaj   +1 more source

Volatile trace metals deposited in ice as soluble volcanic aerosols during the 17.7.ka eruptions of Mt Takahe, West Antarctic Rift

Frontiers in Earth Science, 2022
Volatile metals are emitted at significant rates as gases and particulates from volcanoes, although their speciation, bioreactivity and longevity during atmospheric transport are essentially unknown. Ice cores provide detailed yet largely unexplored long-
Emily Mason, Marie Edmonds, Joseph R. McConnell   +2 more
doaj   +1 more source