ceip annual meeting, poznan, poland, 8 -10 oct 2007 advex, the carboeurope-ip advection activities:...

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)


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


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


ADVEX overview paper, Agric. Forest Meteorol., in press

uncorrected proof availabledoi:10.1016/j.agrformet.2007.08.013corrected proof available online soon…


ADVEX overview paper summary: experimental setup


ADVEX overview paper summary: vertical advection

positive during the night zero Zero mean but large scatter


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


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


- 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


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


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)


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


Thank you for your attentionMore information

parallel session this afternoon 15:45room Concordia

Funding2005-2006 : CEIP2007 : FUSAGx; University of Tuscia, Viterbo2008 : FUSAGx faculty grant

ceip annual meeting, poznan, poland, 8 -10 oct 2007 advex, the carboeurope-ip advection activities:...

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