Results 11 to 20 of about 27,505 (199)
How well can satellite altimetry and firn models resolve Antarctic firn thickness variations? [PDF]
The Cryosphere, 2023 Elevation changes of the Antarctic Ice Sheet (AIS) related to surface mass balance and firn processes vary strongly in space and time. Their subdecadal natural variability is large and hampers the detection of long-term climate trends.
M. T. Kappelsberger +8 more
doaj +6 more sources
Numerical experiments on firn isotope diffusion with the Community Firn Model [PDF]
Journal of Glaciology, 2021 AbstractAdvances in analytical methods have made it possible to obtain high-resolution water isotopic data from ice cores. Their spectral signature contains information on the diffusion process that attenuated the isotopic signal during the firn densification process.
Vasileios Gkinis +5 more
openaire +4 more sources
A new model of dry firn-densification constrained by continuous strain measurements near South Pole
Journal of Glaciology, 2023 Converting measurements of ice-sheet surface elevation change to mass change requires measurements of accumulation and knowledge of the evolution of the density profile in the firn.
C. Max Stevens +5 more
doaj +1 more source
Improved representation of the contemporary Greenland ice sheet firn layer by IMAU-FDM v1.2G [PDF]
Geoscientific Model Development, 2022 The firn layer that covers 90 % of the Greenland ice sheet (GrIS) plays an important role in determining the response of the ice sheet to climate change.
M. Brils +3 more
doaj +1 more source
Annals of Glaciology, 2022 AbstractAntarctic firn presents an exotic seismological environment in which the behaviors of propagating waves can be significantly at odds with those in other Earth media. We present a condensed view of the nascent field of ambient noise seismology in Antarctic firn-covered media, and highlight multiple unusual and information-rich observations ...
Julien Chaput +2 more
openaire +2 more sources
Journal of Advances in Modeling Earth Systems, 2022 Earth system models account for seasonal snow cover, but many do not accommodate the deeper snowpack on ice sheets (aka firn) that slowly transforms to ice under accumulating snowfall.
Adam M. Schneider +2 more
doaj +1 more source
Atmosphere, 2020 Understanding how physical characteristics of polar firn vary with depth assists in interpreting paleoclimate records and predicting meltwater infiltration and storage in the firn column.
Ian E. McDowell +3 more
doaj +1 more source
Brief communication: Improved simulation of the present-day Greenland firn layer (1960–2016) [PDF]
The Cryosphere, 2018 By providing pore space for storage or refreezing of meltwater, the Greenland ice sheet firn layer strongly modulates runoff. Correctly representing the firn layer is therefore crucial for Greenland (surface) mass balance studies.
S. R. M. Ligtenberg +3 more
doaj +1 more source
Physical limits to meltwater penetration in firn
Journal of Glaciology, 2021 Processes governing meltwater penetration into cold firn remain poorly constrained. Here, in situ experiments are used to develop a grain-scale model to investigate physical limitations on meltwater infiltration in firn.
Neil F. Humphrey +2 more
doaj +1 more source
Hot water drilling in the firn layer of Greenland's percolation zone
Annals of Glaciology, 2021 The intermixed thermal and structural framework of cold firn, water-saturated firn and ice layers in Greenland's percolation zone can be challenging to penetrate with core drills.
Neil Humphrey +2 more
doaj +1 more source