weird
1.0
Quantifying Surface Heat Exchange over Heterogeneous Land Surfaces at Ultra-High Spatio-Temporal Resolution
Michael Haugeneder, Michael Lehning, Tobias Jonas, Rebecca Mott
Michael Haugeneder
Quantifying Surface Heat Exchange over Heterogeneous Land Surfaces at Ultra-High Spatio-Temporal Resolution
2022
Birmensdorf, Switzerland
EnviDat
1.0
csv,*.zip,netcdf4
DOI
doi:10.16904/envidat.299
https://www.envidat.ch/dataset/weird
TECHNICAL CONTACT
Michael
Haugeneder
michael.haugeneder@slf.ch
EARTH SCIENCE
CLIMATE INDICATORS
LAND SURFACE/AGRICULTURE INDICATORS
environment
2D TEMPERATURE FIELD
2D WIND FIELD
INFRARED THERMOGRAPHY
NEAR-SURFACE ATMOSPHERIC LAYER
PATCHY SNOW COVER
SNOW MELT
SNOW-ATMOSPHERE INTERACTIONS
SURFACE HEAT EXCHANGE
Not provided
Not provided
Not provided
2022-01-01
COMPLETE
CARTESIAN
CARTESIAN
9.948184490203857
46.85940286020026
46.85940286020026
46.85940286020026
9.948184490203857
9.948184490203857
9.948184490203857
46.85940286020026
Not provided
Public access to the data
Usage constraintes defined by the license "WSL Data Policy", see https://www.wsl.ch/en/about-wsl/programmes-and-initiatives/envidat.html
English
Snow Hydrology
DISTRIBUTOR
WSL
Swiss Federal Institute for Forest, Snow and Landscape Research WSL
https://www.wsl.ch
DATA CENTER CONTACT
EnviDat
envidat@wsl.ch
https://www.envidat.ch/envidat_thumbnail.png
The lateral transport of heat above abrupt (sub-)metre-scale steps in land surface temperature influences the local surface energy balance. We present a novel experimental method to investigate the stratification and dynamics of the near-surface atmospheric layer over a heterogeneous land surface. Using a high resolution thermal infrared camera pointing at synthetic screens, a 30Hz sequence of frames is recorded. The screens are deployed upright and horizontally aligned with the prevailing wind direction. The screen’s surface temperature serves as a proxy for the local air temperature. We developed a method to estimate near-surface two-dimensional wind fields at centimetre resolution from tracking the air temperature pattern on the screens. Wind field estimations are validated with near-surface three-dimensional short-path ultrasonic data. To demonstrate the capabilities of the screen method, we present results from a comprehensive field campaign at an alpine research site during patchy snow cover conditions. The measurements reveal an extremely heterogeneous near-surface atmospheric layer. Vertical profiles of horizontal and vertical wind speed reflect multiple layers of different static stability within 2m above the surface. A dynamic, thin stable internal boundary layer (SIBL) develops above the leading edge of snow patches protecting the snow surface from warmer air above. During pronounced gusts the warm air from aloft entrains into the SIBL and reaches down to the snow surface adding energy to the snow pack. Measured vertical turbulent sensible heat fluxes are shown to be consistent with air temperature and wind speed profiles obtained using the screen method and confirm its capabilities to investigate complex in situ near-surface heat exchange processes. Here you find the data and the documented code used to create the plots in the publication.
https://www.envidat.ch/dataset/weird
gcmd_dif
VERSION 10.2
2022-02-24T16:15:53.573278
2022-11-21T07:56:49.683737
2022-02-24T16:15:53.573278
2022-11-21T07:56:49.683737
False