Results 101 to 110 of about 314,168 (203)

Spatial and temporal variability in the snowpack of a High Arctic ice cap: implications for mass-change measurements [PDF]

open access: yes, 2008
Interpretation of ice mass elevation changes observed by satellite altimetry demands quantification of the proportion of elevation change which is attributable to variations in firn densification.
Bell, Christina   +16 more
core   +1 more source

Long-lived halocarbon trends and budgets from atmospheric chemistry modelling constrained with measurements in polar firn [PDF]

open access: yesAtmospheric Chemistry and Physics, 2009
The budgets of seven halogenated gases (CFC-11, CFC-12, CFC-113, CFC-114, CFC-115, CCl<sub>4</sub> and SF<sub>6</sub>) are studied by comparing measurements in polar firn air from two Arctic and three Antarctic sites, and ...
P. Martinerie   +8 more
doaj  

The interplay of global and polar regimes

open access: yes, 1999
The growing salience of interactions between the functionally broad but geographically narrow regimes for the polar regions and the geographically broad but functionally specific regimes emerging to deal with global environmental changes directs ...
Young, Oran R.
core   +1 more source

Polar bears killed in Svalbard 1987–1992

open access: yes, 1993
A total of 26 polar bears have been killed in Svalbard since January 1987. Fifteen of these cases were self defense, four precautionary measures, six acts of mercy and one unknown.
Gjertz, Ian   +2 more
core   +1 more source

Polar bivalves are characterized by high antioxidant defences

open access: yes, 2005
Inevitably, aerobic life leads to the formation of deleterious reactive oxygen species (ROS) which participate in biomolecule oxidation, hence augmenting biomolecule turnover.
Depledge, Michael H.   +3 more
core   +1 more source

20th century trends and budget implications of chloroform and related tri-and dihalomethanes inferred from firn air [PDF]

open access: yesAtmospheric Chemistry and Physics, 2006
Four trihalomethane (THM; CHCl3, CHBrCl2, CHBr2Cl and CHBr3) and two dihalomethane (DHM; CH2BrCl and CH2Br2) trace gases have been measured in air extracted from polar firn collected at the North Greenland Icecore Project (NGRIP) site.
D. R. Worton   +5 more
doaj  

Kinetic grain growth in firn induced by meltwater infiltration on the Greenland Ice Sheet [PDF]

open access: yesThe Cryosphere
The microstructure of polar firn governs its porosity, permeability, and compaction rate, and is thus critical to understanding surface elevation change, heat and gas exchange, and meltwater infiltration on ice sheets.
K. L. Gehl, J. T. Harper, N. F. Humphrey
doaj   +1 more source

Modeling heat, mass, and species transport in polar firn [PDF]

open access: yesAnnals of Glaciology, 1996
A finite-element model for simulating multi-dimensional air flow with heat, mass and chemical species transport through firn is discussed. The model is applied to an investigation of near-surface layering effects on ventilation rates. Field measurements of permeability at Summit, Greenland, are presented that show that permeability varies by at least a
openaire   +1 more source

Review of Climate change in the polar regions, by John Turner & Gareth J. Marshall

open access: yes, 2012
In this ambitious, cross-disciplinary volume, British Antarctic Survey scientists John Turner and Gareth Marshall synthesize what is known about climate change in the Arctic and Antarctic and compare the changes that have occurred in the two polar ...
Orheim, Olav
core   +1 more source

Ichnodiversity and bathymetric range of microbioerosion traces in polar barnacles of Svalbard

open access: yes, 2020
This first comprehensive investigation of microbioerosion traces in polar barnacles addresses two bathymetrical transects from the intertidal down to subtidal water depths in two different carbonate factories in the Svalbard Archipelago: the bay ...
Wisshak, Max   +2 more
core   +1 more source

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