Concept
Snowball Earth
Related publications (46)
Physicochemical characterization and source apportionment of Arctic ice-nucleating particles observed in Ny-Alesund in autumn 2019
Athanasios Nenes, Ghislain Gilles Jean-Michel Motos, Jörg Wieder, Guangyu Li
Ice-nucleating particles (INPs) initiate primary ice formation in Arctic mixed-phase clouds (MPCs), altering cloud radiative properties and modulating precipitation. For atmospheric INPs, the complexity of their spatiotemporal variations, heterogeneous sou ...
Gottingen2023Reproducibility Dataset for CRYOWRF v1.0
Varun Sharma, Michael Lehning, Franziska Gerber
This repository contains data required for reproducibility of the results to be published in the associated manuscript. Apart from reproducibility, the attached datasets also serve as templates for new users to adopt CRYOWRF in their research. The datasets ...
2023The Biogeochemical Legacy of Arctic Subglacial Sediments Exposed by Glacier Retreat
During past periods of advance, Arctic glaciers and ice sheets overrode soil, sediments, and vegetation and buried significant stores of organic matter (OM); these glaciers are now shrinking rapidly due to climate warming. Little is known about the biogeoc ...
2022Wind Transport of Snow Impacts Ka- and Ku-band Radar Signatures on Arctic Sea Ice
Marc Schneebeli Zeugin, David Nicholas Wagner
Wind transport alters the snow topography and microstructure on sea ice through snow redistribution controlled by deposition and erosion. The impact of these processes on radar signatures is poorly understood. Here, we examine the effects of snow redistrib ...
2022Parameterizing snow saltation: the exponential decay of the mass flux profile and its relation to the saltation dynamics
Varun Sharma, Michael Lehning, Daniela Brito Melo, Armin Sigmund
Drifting snow events lead to snow redistribution and enhance snow sublimation. Taking into account the importance of snow sublimation to the correct prediction of the surface mass balance, a general consensus has emerged within the scientific community on ...
2022High-speed imaging of snow saltation: wind tunnel experiments using natural snow
Michael Lehning, Daniela Brito Melo, Benjamin Andreas Walter
Drifting snow is a multi-scale process. It is composed of particles rolling and sliding along the surface, particles in saltation following short ballistic trajectories in the first 10 cm above the surface and particles in suspension at higher regions of t ...
2022Introducing CRYOWRF v1.0: Multiscale atmospheric flow simulations with advanced snow cover modelling
Varun Sharma, Franziska Gerber
Accurately simulating snow-cover dynamics and the snow-atmosphere coupling is of major importance for topics as wide-ranging as water resources, natural hazards and climate change impacts with consequences for sea-level rise. We present a new modelling fra ...
2021The role of glaciers as sources of stream nutrients in a high mountain catchment
In the high mountain environments, streams often appear nutrient-limited. In glaciated catchments however, glacier meltwater acts as sources of nitrogen (N) and phosphorus (P) to downstream ecosystems, but research investigating t ...
2021Ice multiplication from ice-ice collisions in the high Arctic: sensitivity to ice habit, rimed fraction, ice type and uncertainties in the numerical description of the process
Athanasios Nenes, Georgia Sotiropoulou
Atmospheric models often fail to correctly reproduce the microphysical structure of Arctic mixed-phase clouds and underpredict ice water content even when the simulations are constrained by observed levels of ice nucleating particles. In this study we inve ...
COPERNICUS GESELLSCHAFT MBH2021Crystal electric field excitations in the quantum spin liquid candidate NaErS2
Christian Rüegg, Daniel Biner, Shang Gao
The delafossite family of compounds with a triangular lattice of rare earth ions has been recently proposed as a candidate host for quantum spin liquid (QSL) states. To realize QSLs, the crystal electric field (CEF) ground state of the rare earth ions shou ...
AMER PHYSICAL SOC2020