Pictures and graphs

Photosynthesis and transpiration measured in the Stillberg COST-project about the influence of CO2 and warming on an Alpine tree-line ecosystem

Tin foil with collected secondary organic aerosol (SOA) from a Smog chamber experiment. The amount of SOA is about 3 micro-g. The inner part of the foil was cut out and combusted in an elemental analyser.

Map of Switzerland with site location and species investigated from Saurer et al 2008 (light color for deciduous and dark color for coniferous species). The lines indicate all significant correlations between the different isotope chronologies in the common period 1913–1995 (dotted lines for d18O; solid lines for d13C; p < 0.05)

Conceptual scheme relating dual isotope changes to physiological parameters, from Saurer and Siegwolf (Human impacts on tree-ring growth reconstructed from stable isotopes, Elsevier, 2007)

Participants of the Swiss-Russian Seminar in Barnaul, 30 June -7 July 2008

Altai mountains (picture courtesy of T. Papina)

Relationship between tree-ring 18O-variations in Siberia and ice-core 18O-variations in Greenland from AD 900-1000 (Sidorova et al. 2008)

450 year old oak tree from Southern Switzerland in a protected area. Cores from this tree were prepared in the framework of ISONET (ISONET)

Screenshot of the ISODAT-program during an 18O analysis of water. The central panel shows the CO-peaks from the pyrolysis of water (3 injections)

That's how a used oxidation tube (lower panel) and reduction tube (upper panel) may look like. After disassembling from the elemental analyser which is used for the isotope analysis of organic samples

Traffic across Alpine valleys produces nitrogen emissions that may endanger protection forests. 15N analysis in tree-rings helps to determine past pollution loads

Installation for micrometeorological measurements in a grassland (CARBOMONT)

Traps for water vapour sampling during field work

Larch forest in the Simplon area where samples in the framework of "Millennium" have been taken