1. CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007 ADVEX, the CarboEurope-IP advection activities: past, present and future C. Feigenwinter 1,7, M. Aubinet 1 and the ADVEX teams 1,2,3,4,5,6 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)

2. CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007 ADVEX field campaigns Renon/Ritten Italian Alps, Italy Wetzstein Thuringia, Germany Norunda Uppland, 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

3. CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007 ADVEX workshop in LUND 22-24 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

4. CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007 ADVEX overview paper, Agric. Forest Meteorol., in press uncorrected proof available doi:10.1016/j.agrformet.2007.08.013 corrected proof available online soon…

5. CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007 ADVEX overview paper summary: experimental setup

6. CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007 ADVEX overview paper summary: vertical advection positive during the nightzero Zero mean but large scatter

7. CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007 ADVEX overview paper summary: horizontal advection Positive during the night slightly negative during the day, trunk space Weak positive advection during the night trunk space Large negative advection during the night large scatter crown space

8. CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007 ADVEX oveview paper summary: advection and flow direction at night Well defined pattern related to drainage flows, reducing the reported sink Weak advection for some wind sectors Large negative advection, large scatter, chaotic reducing the reported source

9. 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

10. CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007 Direction of future scientific work ADVEX field campaigns Typology mechanisms 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 advection July 2008 in Belgium

11. CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007 Synthesis: mechanisms at work during calm and stable nights Aubinet (2007) Ecol. Appl., accepted

12. CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007 Exploring the “noise” 360 ppm540 ppm 100 m 30 m Norunda central tower ADVEX tower A ADVEX tower B ADVEX tower C ADVEX tower D

13. CEIP annual meeting, Poznan, Poland, 8 -10 Oct 2007 Thank you for your attention More information parallel session this afternoon 15:45 room Concordia Funding 2005-2006: CEIP 2007: FUSAGx; University of Tuscia, Viterbo 2008 : FUSAGx faculty grant