Modeling chemistry in and above snow at Summit, Greenland – Part 1: Model description and results [PDF]
, 2011 Sun-lit snow is increasingly recognized as a chemical reactor that plays an active role in uptake, transformation, and release of atmospheric trace gases.
Dibb, JE +6 more
core +3 more sources
Modelling the transition from grain-boundary sliding to power-law creep in dry snow densification
Journal of Glaciology, 2022 This paper presents a physics-based macroscale model for the densification of dry snow which provides for a smooth transition between densification by grain-boundary sliding (stage 1) and densification by power-law creep (stage 2).
Elizabeth M. Morris +2 more
doaj +1 more source
Spatial variability of snow chemistry in western Dronning Maud Land, Antarctica [PDF]
, 1998 During the austral summer of 1993-94 a number of 1-2 m deep snow pits were sampled in connection with firn-coring in western Dronning Maud Land, Antarctica. The traverse went from 800 to about 3000 m a.s.l. upon the high-altitude plateau.
Gundestrup, Niels +7 more
core +4 more sources
Can the carbon isotopic composition of methane be reconstructed from multi-site firn air measurements? [PDF]
Atmospheric Chemistry and Physics, 2013 Methane is a strong greenhouse gas and large uncertainties exist concerning the future evolution of its atmospheric abundance. Analyzing methane atmospheric mixing and stable isotope ratios in air trapped in polar ice sheets helps in reconstructing the ...
C. J. Sapart +12 more
doaj +1 more source
Vertical profile of snow-firn density in the vicinity of Vostok station, Central Antarctica
Лëд и снег, 2023 The density of the snow and firn thickness is one of the fundamental and most important physical properties of the polar ice sheets. The data on density is used for reconstructing the past snow accumulation rate variability based on firn core studies ...
A. A. Ekaykin +5 more
doaj +1 more source
137CS gamma-ray detection at Summit, Greenland [PDF]
, 1994 Global fall-out from atmospheric testing of thermonuclear weapons produced horizon markers corresponding to the initiation of testing in 1953 and the maximum fall-out in 1963.
Dibb, Jack E., Dunphy, P. P.
core +2 more sources
Estimation of gas record alteration in very low-accumulation ice cores [PDF]
Climate of the Past, 2020 We measured the methane mixing ratios of enclosed air in five ice core sections drilled on the East Antarctic Plateau. Our work aims to study two effects that alter the recorded gas concentrations in ice cores: layered gas trapping artifacts and firn ...
K. Fourteau +5 more
doaj +1 more source
Texture of Polar Firn for Remote Sensing [PDF]
Annals of Glaciology, 1987 Knowledge of the texture of polar firn is necessary for interpretation of remotely sensed data. We find that dry polar firn is an irregularly stratified, anisotropic medium. Grains in firn may be approximated as prolate spheroids with average axial ratios as high as 1.2 or greater and with a preferred orientation of long axes clustered around the ...
openaire +2 more sources
Frontiers in Earth Science, 2023 Introduction: The products of volcanic eruptions found in the snow, firn and ice deposits of the polar ice sheets are precious sources of information on the volcanic forcing of the climate system in the recent or remote past.
Arina N. Veres +6 more
doaj +1 more source
Response of Pacific-sector Antarctic ice shelves to the El Niño/Southern Oscillation. [PDF]
, 2018 Satellite observations over the past two decades have revealed increasing loss of grounded ice in West Antarctica, associated with floating ice shelves that have been thinning.
Adusumilli, S +5 more
core +1 more source