Description: Background: The evolution and ablation of the seasonal snowcover in a forest is very different compared to snow in the open. A canopy may absorb radiation, dampen turbulent fluxes and intercept precipitation. Given a heterogeneous canopy structure, the energy and mass budget of a forest snowcover typically features a highly complex spatio-temporal dynamics. As boreal and subalpine forests cover large areas of the Northern Hemisphere land surface, snow-forest processes have an important influence on weather and hydrology, even at hemispheric scales. Approach / Measurements: In this project we focus on the radiation balance inside subalpine forests in winter. A novel instrument was developed to capture the spatio-temporal variability of radiation below the canopy: A four-component net-radiometer is periodically moved back and forth along a 10-m transect. As reference, two further net-radiometer are installed, one instrument above the canopy and another instrument on a nearby clear-cut site. Sites: The radiation measurements are carried out on two long-term research sites. Between 2003 and 2007 the measuring device was installed at our research site in Alptal at 1200 m a.s.l.. Since then the radiation measurements are being continued at our research site Seehornwald in Davos at 1650 m a.s.l. Link to other projects: This project contributes to the development of our snowcover models Snowpack and Alpine3D. These models include a detailed description of snow-forest processes and have been tested against data from this project. Furthermore, we provided data for the international snow model intercomparison project SnowMIP2.
SupportProgram
Origins: /Bund/UBA/UFORDAT
Tags: Alphastrahlung ? Baumkrone ? Betastrahlung ? Gammastrahlung ? Infrarotstrahlung ? Messgerät ? Messstation ? Neutronenstrahlung ? Röntgenstrahlung ? Vegetation ? Fluss ? Davos ? Erdwärmenutzung ? Globalstrahlung ? Ionisierende Strahlung ? Licht ? Nichtionisierende Strahlung ? Solarstrahlung ? Strahlenschaden ? UV-Strahlung ? Kosmische Strahlung ? Elektromagnetische Strahlung ? Absorption ? Gebäude ? Strahlenexposition ? Strahlungsbilanz ? Strahlungsmessung ? Winter ? Strahlung ? Globale Umweltfazilität ? Projektförderung ? Pflanzenorgan ? Evolution ? Energie ? Verwitterung ? Bevölkerungsentwicklung ? Kahlschlag ? Energiebilanz ? Schnee ? Daten ? Messung ? Standortwahl ? Forschungsprojekt ? Hydrologie ? Forschung ? Niederschlag ? Pilotprojekt ? Radioaktivität ? Schadstoffbildung ? Abdeckung ? Turbulenz ? Überwinterung ? Atmosphäre ? Wetter ? Bauelement ? Wald ? Landschaft ? Bauvorhaben ? Hintergrundstrahlung ? Budget ? Werkzeug ? Ökosystemkomponente ? gemischt ? Bestandteil ? Annäherung ? jahreszeitlich ? neu ? Zeitschrift ? beweglich ? bewegt ? nördlich ? ein- ? Dauer ? unter ? Hemisphäre [nördlich] ? Historische Entwicklung ? vergleichen ? Land ? Oberfläche ? Projekt ? Projekt-UVP ? wichtig ? Präzipitation ? Referenz ? Schallabstrahlung ? Alte Wirkstoffe [EU-Biozidrichtlinie] ?
License: cc-by-nc-nd/4.0
Language: Englisch/English
Time ranges: 2003-01-01 - 2011-12-31
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