Results 21 to 30 of about 1,022,984 (305)

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

open access: yesFrontiers 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   +5 more
doaj   +1 more source

A 100-year record of North Pacific volcanism in an ice core from Eclipse icefield, Yukon Territory, Canada [PDF]

open access: yes, 2003
A record of regionally significant volcanic eruptions in the North Pacific over the last century has been developed using a glaciochemical record from Eclipse Icefield, Yukon Territory, Canada.
Germani, Mark S   +2 more
core   +3 more sources

Diffusive equilibration of N2, O2 and CO2 mixing ratios in a 1.5-million-years-old ice core [PDF]

open access: yesThe Cryosphere, 2014
In the framework of the International Partnerships in Ice Core Sciences, one of the most important targets is to retrieve an Antarctic ice core that extends over the last 1.5 million years (i.e.
B. Bereiter   +3 more
doaj   +1 more source

Basal debris of the NEEM ice core, Greenland: a window into sub-ice-sheet geology, basal ice processes and ice-sheet oscillations

open access: yesJournal of Glaciology, 2023
We present new data from the debris-rich basal ice layers of the NEEM ice core (NW Greenland). Using mineralogical observations, SEM imagery, geochemical data from silicates (meteoric 10Be, εNd, 87Sr/86Sr) and organic material (C/N, δ13C), we ...
Pierre-Henri Blard   +13 more
doaj   +1 more source

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

open access: yesJournal 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   +11 more
doaj   +1 more source

Automated ice-core layer-counting with strong univariate signals [PDF]

open access: yes, 2012
We present an automated process for determining the annual layer chronology of an ice-core with a strong annual signal, utilising the hydrogen peroxide record from an Antarctic Peninsula ice-core as a test signal on which to count annual cycles and ...
Abram, N.J.   +5 more
core   +2 more sources

Ice core paleovolcanic records from the St. Elias Mountains, Yukon, Canada [PDF]

open access: yes, 2007
We previously reported a record of regionally significant volcanic eruptions in the North Pacific using an ice core from Eclipse Icefield (St. Elias Mountains, Yukon, Canada).
Germani, Mark S   +4 more
core   +3 more sources

Age estimates of isochronous reflection horizons by combining ice core, survey, and synthetic radar data. [PDF]

open access: yes, 2004
Ice core records and ice-penetrating radar data contain complementary information on glacial subsurface structure and composition, providing various opportunities for interpreting past and present environmental conditions.
Eisen, Olaf   +3 more
core   +1 more source

Seasonal deuterium excess in a Tien Shan ice core: Influence of moisture transport and recycling in Central Asia [PDF]

open access: yes, 2003
Stable water isotope (δ18O, δD) data from a high elevation (5100 masl) ice core recovered from the Tien Shan Mountains, Kyrgyzstan, display a seasonal cycle in deuterium excess (d = δD − 8*δ18O) related to changes in the regional hydrologic cycle during ...
Aizen, V   +4 more
core   +3 more sources

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

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