Concept

Tempête hivernale

Publications associées (94)

Interactions between drifting snow and surface dynamics

In the cryosphere, the snow cover is the fastest changing component. Amongst other characteristics, the snow cover acts as a resource of water or has the ability to reflect the suns radiation and therefore significantly influence the climate on a global sc ...

EPFL2018

Snow cover variations and spring snowmelt runoff modelling in the source region of the Yellow River, China

Léo Zhou Ficheux

This study aims to assess the snow cover spatial and temporal variation in the Source Region of the Yellow River, to understand the effect of snowmelt on the hydrology and to evaluate the potential impact of increasing temperature on the spring snowmelt ru ...

2018

Investigation of a wind-packing event in Queen Maud Land, Antarctica

Michael Lehning, Nander Wever, Christian Gabriel Sommer, Charles Fierz

Surface snow in polar and mountainous regions is often mobile and this mobility influences surface mass balance and isotopic composition before final deposition, which is poorly understood thus far. In December 2016 and January 2017, during a field campaig ...

COPERNICUS GESELLSCHAFT MBH2018

Snowpack runoff formation processes during rain-on-snow events

Sebastian Würzer

Rain-on-snow (ROS) events cause repeated flooding in many mountainous regions with a seasonal snow cover. The complex interaction of processes across spatial scales makes it difficult to accurately predict the effect of snow cover on runoff formation for a ...

EPFL2018

CLIMATE-INDUCED CHANGES IN SPRING SNOWMELT IMPACT ECOSYSTEM METABOLISM AND CARBON FLUXES IN AN ALPINE STREAM NETWORK

Tom Ian Battin, Enrico Bertuzzo, Amber Joy Ulseth

Although stream ecosystems are recognized as an important component of the global carbon cycle, the impact of climate-induced hydrological changes on carbon fluxes in stream networks remain unclear. We will discuss the effects of changes in snowmelt hydrol ...

2017

Impact of climate change in Switzerland on socioeconomic snow indices

Michael Lehning, Charles Fierz

Snow is a key element for many socioeconomic activities in mountainous regions. Due to the sensitivity of the snow cover to variations of temperature and precipitation, major changes caused by climate change are expected to happen. We analyze the evolution ...

Springer Verlag2017

Clustering of winter precipitations in Valais

Clémence Marie Anne Le Cornec

This master thesis provides an extended study of winter precipitations in Valais (Switzerland). It was rst tried to relate local conditions in Valais, as measured at gauges, to the Hess-Brezowski classication for Europe. It was not possible to clearly rela ...

2017

The effects of ozone depletion, increased greenhouse gas emissions, and increased aerosols on precipitation in High-Mountain Asia

High-Mountains Asia (HMA) forms the largest mountain mass on Earth and provides the water needs for more than one billion people living in downstream regions. They play a crucial role by interacting with regional atmospheric circulations, such as the summe ...

2017

Wind tunnel experiments: saltation is necessary for wind-packing

Michael Lehning, Christian Gabriel Sommer, Charles Fierz

Wind-packed snow in the form of slabs or crusts is an important part of alpine and polar snow covers. Yet, the formation process of such layers is poorly understood. For example, it remains unclear whether drifting snow is necessary for wind-packing or not ...

International Glaciological Society2017

Modelling liquid water transport in snow under rain-on-snow conditions – considering preferential flow

Michael Lehning, Nander Wever, Sebastian Würzer, Tobias Jonas

Rain on snow (ROS) has the potential to generate severe floods. Thus, precisely predicting the effect of an approaching ROS event on runoff formation is very important. Data analyses from past ROS events have shown that a snowpack experiencing ROS can eith ...

Copernicus GmbH2017

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