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| Titel |
The role of advection for CO2 exchange flux over a moutainous grassland in the Alps |
| VerfasserIn |
Peng Zhao, Albin Hammerle, Georg Wohlfahrt |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250127579
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| Publikation (Nr.) |
 EGU/EGU2016-7471.pdf |
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| Zusammenfassung |
| The inclusion of the advection contribution can improve the quantification of net ecosystem
exchange (NEE) budget. However, advection observation is challenging and the role of
advection is thus often ignored in the literature. In this study, a field campaign was conducted
on the basis of the advection completed mass balance (ACMB) concept. The observation
took place in October 2015 at the FLUXNET site Monte Bondone, which was
located on a permanent alpine meadow in a mountainous area in Northern Italy. A
home-assembled solenoid valve system, together with multiple tubes and a gas
analyser, was used to analyse CO2 concentration at multiple positions across the
faces at three heights of the control volume. Horizontal advection of CO2 was thus
calculated from the measurement of wind components and CO2 gradients, from which
the storage term can be derived as well. Vertical flux of CO2 was measured by
eddy-covariance technique. Three automatic chambers measured NEE as reference.
Data post-processing is still in progress and preliminary results will come soon. |
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