Observed changes in the surface elevation of the Greenland Ice Sheet are caused by ice dynamics, basal elevation change, basal melt, surface mass balance (SMB) variability, and by compaction of the overlying firn. The last two contributions are quantified here using a firn model that includes compaction, meltwater percolation, and refreezing. The model is forced with surface mass fluxes and tem...

There is growing evidence for ice and fluids near the surface of Mars with potential discharge of brines, which may preserve a record of past life on the planet. Proven techniques to sample Mars subsurface will be critical for future NASA astrobiology missions that will search for such records. The required technology studies are underway in the McMurdo Dry valleys, Antarctica, which is serving...

Abstract. This study investigates the sensitivity of modeled surface melt and subsurface heating on Antarctic ice sheet to a new spectral snow albedo radiative transfer scheme in Regional Atmospheric Climate Model (RACMO), version 2.3p3 (Rp3). We tune Rp3 observations by performing several experiments assess impact temperature incrementally changing one parameter at time. When fully tuned, comp...

Abstract Refreezing of meltwater in firn is a major component Greenland ice-sheet's mass budget, but situ observations are rare. Here, we compare the density and total ice layer thickness upper 15 m 19 new 27 previously published cores drilled at locations southwest (1850–2360 a.s.l.) between 1989 2019. At all sites, covaries with over time space. two sites earliest (1989 1998), bulk increased ...

Abstract. This study presents simulations of Greenland surface melt for the Eemian interglacial period (∼130 000 to 115 years ago) derived from regional climate with a coupled energy balance model. Surface is high relevance due its potential effect on ice core observations, e.g., lowering preserved total air content (TAC) used infer past elevation. An investigation particularly interesting warm...

TEMPO (2,2,6,6-tetramethylpiperidin-1-oxyl)-oxidized cellulose nanofibers (CNF) were assembled to fibrous clay sepiolite (SEP) by means of a high shear homogenizer and an ultrasound treatment followed lyophilization using three different methods: normal freezing, directional sequential combination both methods. Methyltrimethoxysilane (MTMS) was grafted the foam surface vapor deposition method i...