ICOS/IMECC Workshop on Quantitative Network Design (QND) took place at Jusssieu in Paris (France) on 11-12 June, 2009. The workshop aims to discuss possible methods of QND and to apply the IMECC NA2 research to the need of ICOS project.
|From the left (Dario Papale, Peter Rayner, Thomas Kaminski, Ernest Koffi, EnricoTomelleri, Marko Scholze, Han Dolman, Philippe Ciais). Frederic Chevallier and Leonard Rivier are missing.|
The agenda and the report on the meeting can be found hereafter or download from here. The slides of the presentations (pdf format) can also be download hereafter.
|Thursday June 11|
|12:30 working lunch nearby|
|13:45 Welcome and logistics (Rayner)|
|13:50 Introduction (Dolman)|
|14:10 Quantitative Network Design (.pdf) by Peter Rayner, LSCE, Gif/Yvette, France|
|Estimating European fluxes by various methods|
|14:30 Network Design: What we learned, what we want to learn (?)(.pdf) by Enrico Tomelleri, Max-Planck Institute, Jena, Germany|
|15:00 Are representativeness and Network Design two different problems? by Dario Papale, UNITUS, Viterbo, Italy . For details, contact Dario Papale|
|15:50 Variational flux estimation (.pdf) by Frederic Chevallier, LSCE, Gif/Yvette, France|
|16:20 The Carbon Cycle Data Assimilation System, CCDAS (.pdf) by Marko Scholze, QUEST, University of Bristol, United Kingdom|
|Existing QND efforts|
|16:50 IMECC NA2: Development of a Network Design Tool (.pdf) |
by Thomas Kaminski, Fastopt, Germany
|17:20 Network design in ICOS: some issues (.pdf) |
by Han Dolman, University of Amstersdam, The Netherlands
|Friday June 12|
|Getting down to business|
|09:00 What does ICOS need? (Ciais & Dolman)|
As a deliberately free-form meeting this agenda of course ran late as the discussion of each presentation took longer than proposed.
What is the redundancy in the current network?
It was generally noted that this depends on the underlying complexity of the biosphere, itself a fundamental research topic and the subject of several actions arising from the meeting. We noted one could not answer this question without considering management.
It was noted that some questions had technical implications for the design of the ICOS instrument package, particularly the value of the virtual tall tower measurements.
We noted that the CCDAS tool being used in IMECC-NA2 is the only one currently using flux and concentration measurements simultaneously. It seemed valuable to use this shell around several models.
Several empirical methods can upscale flux measurements to continental carbon balances in which case the network optimisation problem becomes a sampling problem of climate and ecosystem variability. One can test this upscaling either with simple models or an artificial neural network by keeping back some flux sites for validation.
|Call for TA Proposals: Trans-National Access is offered for research stations within IMECC|