Results 31 to 40 of about 161,313 (308)

A simple model to estimate atmospheric concentrations of aerosol chemical species based on snow core chemistry at Summit, Greenland [PDF]

open access: yes, 1995
A simple model is presented to estimate atmospheric concentrations of chemical species that exist primarily as aerosols based on snow core/ice core chemistry at Summit, Greenland. The model considers the processes of snow, fog, and dry deposition.
Bergin, M H   +5 more
core   +2 more sources

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

open access: yesJournal 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   +6 more
doaj   +1 more source

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]

open access: yesAtmospheric Chemistry and Physics, 2010
In this study, we report measurements of CFC-12 (CCl<sub>2</sub>F<sub>2</sub>) 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   +11 more
doaj   +1 more source

Melt regimes, internal stratigraphy, and flow dynamics of three glaciers in the Alaska Range [PDF]

open access: yes, 2012
We used ground-penetrating radar (GPR), GPS and glaciochemistry to evaluate melt regimes and ice depths, important variables for mass-balance and ice-volume studies, of Upper Yentna Glacier, Upper Kahiltna Glacier and the Mount Hunter ice divide, Alaska.
Arcone, Steven   +7 more
core   +2 more sources

Optimization of hot-water ice-coring drills

open access: yesAnnals 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   +6 more
doaj   +1 more source

Response of a marine-terminating Greenland outlet glacier to abrupt cooling 8200 and 9300 years ago [PDF]

open access: yes, 2011
Long-term records of Greenland outlet-glacier change extending beyond the satellite era can inform future predictions of Greenland Ice Sheet behavior. Of particular relevance is elucidating the Greenland Ice Sheet's response to decadal- and centennial ...
Axford, Y.   +6 more
core   +1 more source

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

open access: yesJournal 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   +4 more
doaj   +1 more source

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

open access: yesJournal 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   +8 more
doaj   +1 more source

A last glacial ice sheet on the Pacific Russian coast and catastrophic change arising from coupled ice–volcanic interaction [PDF]

open access: yes, 2008
Controversy exists over the extent of glaciation in Eastern Asia at the Last Glacial Maximum: complete ice sheet cover vs. restricted mountain icefields (an area discrepancy equivalent to 3.7 Greenland Ice Sheets).
Bigg, G.R., Clark, C.D., Hughes, A.L.C.
core   +1 more source

Physically Based Summer Temperature Reconstruction From Melt Layers in Ice Cores

open access: yesEarth 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   +6 more
doaj   +1 more source

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