Results 31 to 40 of about 2,152 (261)

Ground-ice stable isotopes and cryostratigraphy reflect late Quaternary palaeoclimate in the Northeast Siberian Arctic (Oyogos Yar coast, Dmitry Laptev Strait) [PDF]

open access: yesClimate of the Past, 2017
To reconstruct palaeoclimate and palaeoenvironmental conditions in the northeast Siberian Arctic, we studied late Quaternary permafrost at the Oyogos Yar coast (Dmitry Laptev Strait).
T. Opel   +6 more
doaj   +1 more source

Brief Communication: The reliability of gas extraction techniques for analysing CH4 and N2O compositions in gas trapped in permafrost ice wedges [PDF]

open access: yesThe Cryosphere, 2020
Methane (CH4) and nitrous oxide (N2O) compositions in ground ice may provide information on their production mechanisms in permafrost. However, existing gas extraction methods have not been well tested.
J.-W. Yang   +8 more
doaj   +1 more source

Zur Struktur und Entstehung von Eiskeil–Grossformen in Lieth/Elmshorn (Schleswig-Holstein) [PDF]

open access: yesEiszeitalter und Gegenwart, 2007
The deposits near the surface of the Permian and Quarternary in the western part of the “Lieth lime quarry” have been intensively periglacially modified.
A. Grube
doaj   +1 more source

Dissolved organic carbon loss from Yedoma permafrost amplified by ice wedge thaw

open access: yesEnvironmental Research Letters, 2013
Pleistocene Yedoma permafrost contains nearly a third of all organic matter (OM) stored in circum-arctic permafrost and is characterized by the presence of massive ice wedges.
J E Vonk   +9 more
doaj   +1 more source

Sedimentological characteristics of ice-wedge polygon terrain in Adventdalen (Svalbard) – environmental and climatic implications for the late Holocene [PDF]

open access: yesSolid Earth, 2014
Ice wedges are widespread periglacial features in the landscape of Adventdalen, Svalbard. The networks of ice wedges have created areas with well-developed polygonal terrains in the lowest fluvial terraces in this valley.
M. Oliva   +5 more
doaj   +1 more source

Eine begrabene Solifluktionsdecke und ihr Einfluß auf die heutige Vegetation: Beobachtungen auf einer Bliesterterrasse (Saarland) [PDF]

open access: yesEiszeitalter und Gegenwart, 1964
In the lower Blies valley the author discovered a periglacial mudflow consisting of white marl and fragments of limestone, surmounted by 25-30 cm river-sand belonging to a Riß-terrace. The surface of these deposits was covered by fossil ice-wedges.
G. Hard
doaj   +1 more source

Ground-ice origin and age on Herschel Island (Qikiqtaruk), Yukon, Canada

open access: yesQuaternary Science Advances, 2023
Glacial legacies preserved in permafrost such as buried glacial ice of the last ice age are of increasing concern in the Western Canadian Arctic. Permafrost collapse due to melting ground ice largely follows the margins of the maximum Laurentide Ice ...
Sebastian Wetterich   +5 more
doaj   +1 more source

Sea level fluctuations and their signature in the composition and structure of polygonal wedge ice in the Yenisei River lower reaches

open access: yesЛëд и снег, 2015
Late Pleistocene and Holocene polygonal-wedge ice is studied in the lower course of the Yenisei River. Ice distribution, features of the formation, chemical and microbiological composition were determined.
O. L. Opokina   +6 more
doaj   +1 more source

A Numerical Ice Load Prediction Model Based on Ice-Hull Collision Mechanism

open access: yesApplied Sciences, 2020
A simplified numerical model is introduced to predict ice impact force acting on the ship hull in level ice condition. The model is based on ice-hull collision mechanisms and the essential ice breaking characteristics. The two critical ice failure modes,
Meng Zhang   +3 more
doaj   +1 more source

Geochemical Features of Ground Ice from the Faddeevsky Peninsula Eastern Coast (Kotelny Island, East Siberian Arctic) as a Key to Understand Paleoenvironmental Conditions of Its Formation

open access: yesLand, 2023
Understanding paleoenvironmental conditions of the permafrost formation allows us to estimate the permafrost carbon pool and its behavior upon thawing in a changing climate.
Anfisa Pismeniuk   +8 more
doaj   +1 more source

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