Agile Sub-Ice Geological (ASIG) Drill development and Pirrit Hills field project
Annals of Glaciology, 2021 A new drilling system was developed by the US Ice Drilling Program (IDP) to rapidly drill through overlying ice to collect subglacial rock cores. The Agile Sub-Ice Geological (ASIG) Drill system is capable of drilling up to 700 m of ice in a continuous ...
Tanner Kuhl +5 more
doaj +1 more source
Physical and mechanical properties of winter first-year ice in the Antarctic marginal ice zone along the Good Hope Line [PDF]
The Cryosphere, 2022 As part of the 2019 Southern oCean seAsonal Experiment (SCALE) Winter Cruise of the South African icebreaker SA Agulhas II, first-year ice was sampled at the advancing outer edge of the Antarctic marginal ice zone along a 150 km Good Hope Line transect ...
S. Skatulla +24 more
doaj +1 more source
Ice core evidence for a second volcanic eruption around 1809 in the Northern Hemisphere [PDF]
, 2006 A volcanic signal observed in ice cores from both polar regions six years prior to Tambora is attributed to an unknown tropical eruption in 1809. Recovery of dacitic tephra from the 1809 horizon in a Yukon ice core (Eclipse) that is chemically distinct ...
Germani, Mark S +4 more
core +3 more sources
Snow contribution to first-year and second-year Arctic sea ice mass balance north of Svalbard [PDF]
, 2017 The salinity and water oxygen isotope composition (δ18O) of 29 first-year (FYI) and second-year (SYI) Arctic sea ice cores (total length 32.0 m) from the drifting ice pack north of Svalbard were examined to quantify the contribution of snow to sea ice ...
Divine, Dmitry +6 more
core +1 more source
Age estimates of isochronous reflection horizons by combining ice core, survey, and synthetic radar data. [PDF]
, 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
Climatic signals from 76 shallow firn cores in Dronning Maud Land, East Antarctica [PDF]
The Cryosphere, 2015 The spatial and temporal distribution of surface mass balance (SMB) and δ18O were investigated in the first comprehensive study of a set of 76 firn cores retrieved by various expeditions during the past 3 decades in Dronning Maud Land, East ...
S. Altnau +3 more
doaj +1 more source
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 +9 more
doaj +1 more source
The Formation of Uranus and Neptune in Solid-Rich Feeding Zones: Connecting Chemistry and Dynamics [PDF]
, 2009 The core accretion theory of planet formation has at least two fundamental problems explaining the origins of Uranus and Neptune: (1) dynamical times in the trans-Saturnian solar nebula are so long that core growth can take > 15 Myr, and (2) the onset of
Alexander +41 more
core +1 more source
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 +2 more
doaj +1 more source
Reconstructing ice-sheet accumulation rates at ridge B, East Antarctica [PDF]
, 2004 Understanding how ice sheets responded to past climate change is fundamental to forecasting how they will respond in the future. Numerical models calculating the evolution of ice sheets depend upon accumulation data, which are principally available from ...
Antony J. Payne +3 more
core +2 more sources