The EGER (ExchanGE processes in mountainous Regions) project aims at the detailed quantification of relevant processes within the soil-vegetation-atmosphere system by observing diurnal and annual cycles of energy, water and trace gases. The main focus lies on the understanding of process interactions among different scales and their role for corresponding budgets. Field experiments were carried out at the Waldstein site in the Fichtelgebirge mountains (a low mountain range typical for central Europe), which are challenging for their heterogeneity and orographically structured terrain. Field observations are complemented by the application of stand scale models. The EGER joint effort combines biogeochemical, chemical and micrometeorological subprojects.
In the frame of the micrometeorological subproject the following topics were investigated:
• coupling of the different canopy layers and the structure and time scales of coherent structures on a vertical profile
• signature of single coherent structures to separate sources of fluxes from different layers
• advection in the spruce forest with a novel system which allows concentration measurements at the same time at a large number of horizontal measuring points
• adaptation of the ACASA (Advanced Canopy-Atmosphere-Soil algorithm) model for the Waldstein site including an analysis of the sensitivity of the ACASA model to its input parameters
|Serafimovich, A; Thomas, CK; Foken, T: Vertical and horizontal transport of energy and matter by coherent motions in a tall spruce canopy, Boundary-Layer Meteorology, 140, 429-451 (2011), doi:10.1007/s10546-011-9619-z -- Details|
|Foken, T; Aubinet, M; Finnigan, JJ; Leclerc, MY; Mauder, M; Paw U, KT: Results of a panel discussion about the energy balance closure correction for trace gases, Bulletin of the American Meteorological Society, 92(4), ES13-ES18 (2011), doi:DOI: 10.1175/2011BAMS3130.1 -- Details|
|Staudt, K; Serafimovich, A; Siebicke, L; Pyles, RD; Falge, E: Vertical structure of evapotranspiration at a forest site (a case study), Agricultural and Forest Meteorology, 151, 709-729 (2011), doi:10.1016/j.agrformet.2010.10.009 -- Details|
|Siebicke, L; Steinfeld, G; Foken, T: CO2-gradient measurements using a parallel multi-analyzer setup, Atmospheric Measurement Techniques, 4, 409-423 (2011) -- Details|
|Sörgel, M; Trebs, I; Serafimovich, A; Moravek, A; Held, A; Zetzsch, C: Simultaneous HONO measurements in and above a forest canopy: influence of turbulent exchange on mixing ratio differences, Atmospheric Chemistry and Physics, 11, 841-855 (2011) -- Details|
|Siebicke, L; Steinfeld, G; Foken, T: CO2 gradient measurements using a parallel multi-analyzer set, Atmospheric Measurements Techniques Discussions, 3, 4383–4421 (2010) [Link] -- Details|
|Staudt, K; Falge, E; Pyles, RD; Paw U, KT; Foken, T: Sensitivity and predictive uncertainty of the ACASA model at a spruce forest site, Biogeosciences, 7, 3685-3705 (2010), doi:http://www.biogeosciences.net/7/3685/2010/bg-7-3685-2010.html -- Details|
|Sörgel, M; Trebs, I; Serafimovich, A; Moravek, A; Held, A; Zetzsch, C: Simultaneous HONO measurements in and above a forest canopy: Influence of turbulent exchange on mixing ratio differences, Atmospheric Chemistry and Physics, Discussion, 10, 21109–21145 (2010) -- Details|
|Thomas, C; Foken, T: Organised motion in a tall spruce canopy: temporal scales, structure spacing and terrain effects, Boundary-Layer Meteorology, 122, 123-147 (2007), doi:10.1007/s10546-006-9087-z -- Details|
|Thomas, C; Foken, T: Flux contribution of coherent structures and its implications for the exchange of energy and matter in a tall spruce canopy, Boundary-Layer Meteorology, 123, 317-337 (2007), doi:10.1007/s10546-006-9144-7 -- Details|
|Göckede, M; Thomas, C; Markkanen, T; Mauder, M; Ruppert, J; Foken, T: Sensitivity of Lagrangian Stochastic footprints to turbulence statistics, Tellus, 59B, 577-586 (2007), doi:10.1111/j.1600-0889.2007.00275.x -- Details|
|Thomas, C; Mayer, JC; Meixner, FX; Foken, T: Analysis of the low-frequency turbulence above tall vegetation using a Doppler sodar, Boundary-Layer Meteorology, 119, 563-587 (2006), doi:10.1007/s10546-005-9038-0 -- Details|
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