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CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007
ADVEX, the CarboEurope-IP advection activities: past, present and future
C. Feigenwinter1,7 , M. Aubinet1 and the ADVEX teams1,2,3,4,5,6
1 Gembloux Agricultural University, Physique des Bio-systèmes, Gembloux, Belgium (FUSAGx)
2 TU Dresden, Institute of Hydrology and Meteorology, Department of Meteorology, Dresden, Germany (TUD)
3 Max Planck Institute for Biogeochemistry, Jena, Germany (MPI-BGC)
4 University of Lund, Physical Geography and Ecosystems Analysis, Lund, Sweden (LUND)
5 Autonomous Province of Bolzano, Forest Service, Agency of Environment, Bolzano, Italy (APB)
6 Institute of System Biology and Ecology, Laboratory of Plants Ecological Physiology, Brno, Czech Republic (ILE)
7 University of Basel, Institute of Meteorology, Climatology and Remote Sensing, Basel, Switzerland (MCR)
CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007
ADVEX field campaigns
Renon/RittenItalian Alps, Italy
WetzsteinThuringia, Germany
NorundaUppland, Sweden
2005 DOY 125-258 (5 May to 15 Sep)
133 days
2006 DOY 102-170
(12 Apr to 19 Jun)
68 days
2006 DOY 188-261
(7 Jul to 18 Sep)
73 days
CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007
ADVEX workshop in LUND22-24 March 2007
Aim
- To present new ADVEX related findings since the Crete meeting
- To discuss and further develop these findings
- To define the direction of future action and data analysis
List of papers with intention of publication of a journal special issue on advection (to be discussed in the parallel session)
Agreement for organization of a conference on advection to be held in summer 2008 in Belgium
CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007
ADVEX overview paper, Agric. Forest Meteorol., in press
uncorrected proof availabledoi:10.1016/j.agrformet.2007.08.013corrected proof available online soon…
CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007
ADVEX overview paper summary: experimental setup
CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007
ADVEX overview paper summary: vertical advection
positive during the night zero Zero mean but large scatter
CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007
ADVEX overview paper summary: horizontal advection
Positive during the nightslightly negative during the
day, trunk space
Weak positive advection during the night
trunk space
Large negative advection during the night
large scattercrown space
CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007
ADVEX oveview paper summary: advection and flow direction at nightWell defined pattern related to drainage flows, reducing the reported sink
Weak advection for some wind sectors
Large negative advection, large scatter, chaoticreducing the reported source
CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007
- advection affects different sites in different ways- advection occurs under certain local or synoptic meteorological conditions- advection has different reasons at different sites- that it is not possible to use directly measured advection values for estimations of NEE on the base of e.g. half hourly values- that it seems possible to quantify the influence of advection for certain conditions at a certain site- that it may even be possible to extend these findings to general recommendations for certain types of sites (slope, hill, flat)
Main results of site comparison
CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007
Direction of future scientific work
ADVEX field campaigns
Typologymechanisms at work
Aubinet (2007)
Model simulations(CFD, LES)
in cooperation with INRA
Exploring the “noise”
Development of a robust correction scheme of EC-fluxes for advection
Conference on advectionJuly 2008 in Belgium
CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007
Synthesis:mechanisms at work during calm and stable nights
Aubinet (2007)Ecol. Appl., accepted
CONVERGENCE
CONSTANT MASS FLOW
DIVERGENCE
DECREASING SOURCE
INTENSITY
VA > 0 HA < 0
|HA| < |VA|
Vielsalm (B) Aubinet et al. (2003)
Tharandt (D) Feigenwinter et al.
(2004)
CONSTANT SOURCE
INTENSITY
VA > 0 HA = 0
Browns River(CDN) Prince Albert (CDN)
Lee (1998)
INCREASING SOURCE
INTENSITY
VA > 0 HA > 0
Renon (I)
Marcolla et al. (2004)
VA = 0 HA > 0
Hesse (F) Aubinet et al. (2005)
Harvard (USA)
Staebler and Fitzjarrald (2004)
VA < 0 HA > 0
|HA| > |VA|
Niwot Ridge (USA) Turnipseed et al.
(2003)
CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007
Exploringthe
“noise”
360 ppm 540 ppm
100 m
30 m
30 m
30 m
30 m
Norunda central tower
ADVEX tower A
ADVEX tower B
ADVEX tower C
ADVEX tower D
CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007
Thank you for your attentionMore information
parallel session this afternoon 15:45room Concordia
Funding2005-2006 : CEIP2007 : FUSAGx; University of Tuscia, Viterbo2008 : FUSAGx faculty grant