Articles | Volume 13, issue 9
The Cryosphere, 13, 2345–2359, 2019
https://doi.org/10.5194/tc-13-2345-2019
The Cryosphere, 13, 2345–2359, 2019
https://doi.org/10.5194/tc-13-2345-2019

Research article 06 Sep 2019

Research article | 06 Sep 2019

Motion of dust particles in dry snow under temperature gradient metamorphism

Pascal Hagenmuller et al.

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Latest update: 25 Oct 2021
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Short summary
Light–absorbing particles (LAPs, e.g. dust or black carbon) in snow are a potent climate forcing agent. Their presence darkens the snow surface and leads to higher solar energy absorption. Several studies have quantified this radiative impact by assuming that LAPs were motionless in dry snow, without any clear evidence of this assumption. Using time–lapse X–ray tomography, we show that temperature gradient metamorphism of snow induces downward motion of LAPs, leading to self–cleaning of snow.