Turbulence and stand scale modelling

DFG Fo 226/16-1

From 10/2006 to 06/2010

Principal Investigator: Thomas Foken
Staff: Andrei Serafimovich, Katharina Köck (Staudt), Lukas Siebicke, Johannes Lüers, Johannes Olesch, Tobias Biermann, Tobias Gerken, Martina Hunner, Michael Riederer, Friederike Rütz, Stephanie Dix (Schier), Jens-Christopher Mayer, Georg Jocher, Christoph Thieme

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

 

The follow-up project is Fo 226/21-1 (PAK 446)

EGER_Messtürme



Homepage: http://www.bayceer.uni-bayreuth.de/eger/

List of publications of this Project

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


Related links:
  • Diploma Thesis: Besonderheiten der vertikalen Windverteilung am Waldstein
  • Diploma Thesis: Bestimmung turbulenter Flüsse auf einer Waldlichtung mit der Modified-Bowen-Ratio-Methode
  • Diploma Thesis: Fluxes of reactive and non-reactive trace gases near the forest floor
  • Diploma Thesis: Investigation of advection and the wind field in a spruce forest
  • Diploma Thesis: Multilevel investigation of subcanopy respiration flux by REA conditional sampling above and within a spruce forest
  • Diploma Thesis: Parameterization of integral turbulence characteristics above and within a spruce stand
  • Experiment: EGER-IOP1: ExchanGE processes in mountainous Regions - Intensive Observation Periode I
  • Experiment: EGER-IOP2: ExchanGE processes in mountainous Regions - Intensive Observation Periode 2
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