Publication

Atmospheric boundary layers in complex terrain and over ice, snow and vegetated surfaces

2013
Talks

Abstract

Recent field campaigns held at the Val Ferret watershed in 2012 provided turbulent measurements in the atmospheric surface layer with and without snow cover. The turbulent kinetic energy (TKE) over the snow was reduced in comparison to the measurements obtained over bare surface. The “smoothing” of the surface by snow probably has a small role to play in the decrease of the TKE but the importance of the snow cover itself still has to be determined. Recent measurements obtained during the Plaine Morte 2013 field campaign using sonic anemometers are analysed. We discuss how the snowpack impacts the atmospheric turbulence under various snowpack conditions.

Official source

https://infoscience.epfl.ch/entities/publication/1c319b8c-4e0f-4102-96d5-4e61c012a5a2

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2013
Talks

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/1c319b8c-4e0f-4102-96d5-4e61c012a5a2

About this result

Related concepts (32)

Atmospheric science

Atmospheric science is the study of the Earth's atmosphere and its various inner-working physical processes. Meteorology includes atmospheric chemistry and atmospheric physics with a major focus on weather forecasting. Climatology is the study of atmospheric changes (both long and short-term) that define average climates and their change over time, due to both natural and anthropogenic climate variability. Aeronomy is the study of the upper layers of the atmosphere, where dissociation and ionization are important.

Planetary boundary layer

In meteorology, the planetary boundary layer (PBL), also known as the atmospheric boundary layer (ABL) or peplosphere, is the lowest part of the atmosphere and its behaviour is directly influenced by its contact with a planetary surface. On Earth it usually responds to changes in surface radiative forcing in an hour or less. In this layer physical quantities such as flow velocity, temperature, and moisture display rapid fluctuations (turbulence) and vertical mixing is strong.

Snowpack

Snowpack forms from layers of snow that accumulate in geographic regions and high elevations where the climate includes cold weather for extended periods during the year. Snowpacks are an important water resource that feed streams and rivers as they melt. Therefore, snowpacks are both the drinking water source for many communities and a potential source of flooding (in case of sudden melting). Snowpacks also contribute mass to glaciers in their accumulation zone.

Related publications (2)

Atmospheric boundary layers in complex terrain and over ice, snow and vegetated surfaces

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The Uncertainty of Seasonal Snow Energy- and Mass Balance Simulations as a Function of Typical Input Uncertainty

Creation, electronic properties, disorder, and melting of two-dimensional surface-state-mediated adatom superlattices