Publication
On the importance of the humidity flux for the surface mass balance in the accumulation zone of the Greenland Ice Sheet
Publications associées (43)
Snow-Atmosphere Humidity Exchange at the Ice Sheet Surface Alters Annual Mean Climate Signals in Ice Core Records
Surface processes alter the water stable isotope signal of the surface snow after deposition. However, it remains an open question to which extent surface post-depositional processes should be considered when inferring past climate information from ice cor ...
Washington2023CRYOWRF-Model Evaluation and the Effect of Blowing Snow on the Antarctic Surface Mass Balance
Varun Sharma, Michael Lehning, Franziska Gerber
The surface mass balance (SMB) of large polar ice sheets and of snow and ice surfaces in general are incompletely understood because of the complexity of processes involved. One such process, drifting and blowing snow, has only been considered in a very si ...
AMER GEOPHYSICAL UNION2023Assessing sublimation during snow transport and sublimation effects on the isotopic composition of water vapor
Sublimation influences the water storage in snow covers and glaciers, which is important for water use and projections of the sea level rise. Yet, it is challenging to quantify sublimation for large areas or in conditions of snow transport. In-situ measure ...
EPFL2023A Case Study on Drivers of the Isotopic Composition of Water Vapor at the Coast of East Antarctica
Michael Lehning, Armin Sigmund, Riqo Chaar
Stable water isotopes (SWIs) contain valuable information on the past climate and phase changes in the hydrologic cycle. Recently, vapor measurements in the polar regions have provided new insights into the effects of snow-related and atmospheric processes ...
AMER GEOPHYSICAL UNION2023Climate risk and vulnerability assessment tool
Changing climatic conditions and increase of extreme events induced by climate change have impacts on non- adapted infrastructures, leading to destruction, damage costs and indirect impacts. To adapt infrastructures to those new conditions, there is a need ...
2023Reproducibility 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 ...
2023Secondary ice production in summer clouds over the Antarctic coast: an underappreciated process in atmospheric models
Athanasios Nenes, Alexis Berne, Georgia Sotiropoulou, Etienne Gabriel Henri Vignon
The correct representation of Antarctic clouds in atmospheric models is crucial for accurate projections of the future Antarctic climate. This is particularly true for summer clouds which play a critical role in the surface melting of the ice shelves in th ...
2021A glacier-ocean interaction model for tsunami genesis due to iceberg calving
Johan Alexandre Philippe Gaume, Ming Gao
Dynamic glacier fracture and the subsequent generation and propagation of iceberg-induced tsunamis are reproduced using a unified numerical glacier-ocean model, in line with observations at the Eqip Sermia glacier in Greenland, as well as laboratory experi ...
SPRINGERNATURE2021Evidence of Strong Flux Underestimation by Bulk Parametrizations During Drifting and Blowing Snow
Varun Sharma, Michael Lehning, Wolf Hendrik Huwald, Jérôme François Sylvain Dujardin, Daniela Brito Melo, Francesco Comola, Armin Sigmund, Koichi Nishimura
The influence of drifting and blowing snow on surface mass and energy exchange is difficult to quantify due to limitations in both measurements and models, but is still potentially very important over large areas with seasonal or perennial snow cover. We p ...
2021Ice Cover and Extreme Events Determine Dissolved Oxygen in a Placid Mountain Lake
A decrease in hypolimnetic dissolved oxygen (DO) is a commonly seen effect of climate change. However, in oligotrophic Lake Tovel (Italy), a deep mountain lake, annual mean DO (% saturation) has increased from near anoxia to >20% in the bottom layer (35–39 ...
2020