Results 11 to 20 of about 232,915 (212)

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

Ice chemistry on the Galilean satellites [PDF]

Journal of Geophysical Research: Planets, 1998
Jupiter's icy satellites Europa, Ganymede, and Callisto are subject to energy fluxes from electrons, photons, and magnetospheric plasma ion bombardment. As water ice and CO2 ice are thought to be present on their surfaces, the radiolysis of these materials over time should produce more complicated CHO‐containing molecules. These may include CH3OH, H2CO,
Mona L. Delitsky, Arthur L. Lane
openaire   +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

Sea-ice melt CO₂–carbonate chemistry in the western Arctic Ocean: meltwater contributions to air–sea CO₂ gas exchange, mixed-layer properties and rates of net community production under sea ice [PDF]

Biogeosciences, 2014
The carbon dioxide (CO2)-carbonate chemistry of sea-ice melt and co-located, contemporaneous seawater has rarely been studied in sea-ice-covered oceans. Here, we describe the CO2–carbonate chemistry of sea-ice melt (both above sea-ice as "melt ponds" and
N. R. Bates, R. Garley, K. E. Frey, K. L. Shake, J. T. Mathis   +4 more
doaj   +1 more source

Halogen activation via interactions with environmental ice and snow in the polar lower troposphere and other regions [PDF]

Atmospheric Chemistry and Physics, 2012
The role of ice in the formation of chemically active halogens in the environment requires a full understanding because of its role in atmospheric chemistry, including controlling the regional atmospheric oxidizing capacity in specific situations.
J. P. D. Abbatt, J. L. Thomas, K. Abrahamsson, C. Boxe, A. Granfors, A. E. Jones, M. D. King, A. Saiz-Lopez, P. B. Shepson, J. Sodeau, D. W. Toohey, C. Toubin, R. von Glasow, S. N. Wren, X. Yang   +14 more
doaj   +1 more source

High-resolution atmospheric cadmium record for AD 1776–2004 in a high-altitude ice core from the eastern Tien Shan, central Asia

Annals of Glaciology, 2016
Two ice cores drilled to the bottom were recovered from Miaoergou flat-topped glacier (43°03'19“N, 94°19'21“E; 4512 ma.s.l.), eastern Tien Shan, central Asia, in 2005.
Chaomin Wang, Yaping Liu, Wangbin Zhang, Sungmin Hong, Soon Do Hur, Khanghyun Lee, Hongxi Pang, Shugui Hou   +7 more
doaj   +1 more source

Formation of Complex Organic Molecules in Hot Molecular Cores through Nondiffusive Grain-surface and Ice-mantle Chemistry

The Astrophysical Journal Supplement Series, 2022
A new, more comprehensive model of gas–grain chemistry in hot molecular cores is presented, in which nondiffusive reaction processes on dust-grain surfaces and in ice mantles are implemented alongside traditional diffusive surface/bulk-ice chemistry.
Robin T. Garrod, Miwha Jin, Kayla A. Matis, Dylan Jones, Eric R. Willis, Eric Herbst   +5 more
doaj   +1 more source

Glacier naled evolution and relation to the subglacial drainage system based on water chemistry and GPR surveys (Werenskioldbreen, SW Svalbard)

Annals of Glaciology, 2016
Glacier naledi are extrusive ice masses that appear in front of glaciers as a consequence of refreezing of meltwater seepage during the accumulation season.
Łukasz Stachnik, Jacob C. Yde, Marta Kondracka, Dariusz Ignatiuk, Magdalena Grzesik   +4 more
doaj   +1 more source

Contribution of liquid, NAT and ice particles to chlorine activation and ozone depletion in Antarctic winter and spring [PDF]

Atmospheric Chemistry and Physics, 2015
Heterogeneous reactions in the Antarctic stratosphere are the cause of chlorine activation and ozone depletion, but the relative roles of different types of polar stratospheric clouds (PSCs) in chlorine activation is an open question.
O. Kirner, R. Müller, R. Ruhnke, H. Fischer   +3 more
doaj   +1 more source

In search of an ice core signal to differentiate between source-driven and sink-driven changes in atmospheric methane [PDF]

, 2011
The concentration of atmospheric methane increased from around 360 ppbv at the last glacial maximum (∼20 ka before present) to about 700 ppbv in the pre-industrial era (∼200 years before present).
E. W. Wolff, Hutterli, M.A., Wild, O., Wolff, E. W., Pyle, J. A., Carver, G.D., J. G. Levine, A. E. Jones, J. A. Pyle, M. A. Hutterli, Wolff, E.W., Jones, A.E., Levine, J. G., Levine, J.G., Hutterli, M. A., G. D. Carver, O. Wild, Pyle, J.A., Carver, G. D., Jones, A. E.   +19 more
core   +1 more source