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| Titel |
A new tower for monitoring atmosphere-forest exchange processes at TERENO site Wüstebach |
| VerfasserIn |
Clemens Drüe, Günther Heinemann, Alexander Graf, Thomas Pütz |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250049855
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| Zusammenfassung |
| In the German national park Eifel, a 36-m tower was erected in a spruce forest covering the
catchment of a small creek called “Wüstebach”. It is part of the “Eifel/Lower Rhine Valley”
Observatory within the German Terrestrial Environmnetal Observatories (TERENO)
network. The tower instrumentation is intended to yield long-term monitoring of the
atmosphere-canopy exchange processes of a typical mid-latitude forest. Intended applications
are, among others, monitoring reactions of the forest to recent climate change,
serving as national and international comparison site, validation of regional climate
modeling, and basic studies on turbulence over forests. As a primary goal, the site
will serve as a reference for a nearby clearcut intended to accelerate succession
from the current spruce plantation (picea abies) to natural vegetation dominated by
beech.
To characterize the entire exchange process, quantities are measured above,
within an below the vegetation: Flux measurements – above the canopy – comprise
eddy-covariance (EC) measurements of heat, momentum, CO2 and water-vapor
fluxes, measurements of the radiation budget, sunshine hours, and rainfall. Profile
measurements – from the ground to 1.2 times canopy height – at six levels include
temperature, humidity, and horizontal wind vector. Measurements of CO2, and
N2O concentration profiles are planned. Surface and soil property measurements
– around the tower base – are designed for spatially averaging measurement of
surface temperature, stem temperature, as well as soil temperature and moisture (five
levels).
Currently the EC istrumentation is operational and the two other blocks of measurements
being set up. First results show turbulent fluxes that conform with the behaviour of a spruce
forest as reported by other authors. Evaporation apparently matches typical values expected
from the measured rain fall. The performance of different popular turbulence processing
softwares is currently being evaluated. |
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