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IG5/CL5.8/SSP5.3

Stable isotopes as a tool in (paleo-)climate studies in different environments and by multi-proxi approaches (co-organized)
Convener: Dr. Bojar  | Co-Conveners: M Werner , RTW Siegwolf , A. Demény , D. R. Gröcke , Dr. Melinte-Dobrinescu , A. Perşoiu 
Oral Programme
 / Wed, 25 Apr, 13:30–15:00 / Room 39
Poster Programme
 / Attendance Wed, 25 Apr, 17:30–19:00 / Hall A
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This session consists of three sections:

- Stable isotopes as a tool in (paleo-)climate studies:
This section of the session forms a general platform for (paleo-)climate studies where stable isotopes are used as 'proxy' for environmental paramateres. The temperature dependency of isotopic fractionation with formation of phases such as carbonates, phosphates or other materials, is traditionally used for climate determination, although a number of studies have shown much wider application possibilities, ranging from variations of rainfall amount, moisture source, biogenic activity, volcanic deposition, to name a few. All kinds of presentations dealing with stable isotope analyses in (paleo)climate research are highly welcome.

- Marine and continental stable isotope records and paleoclimates:
Stable Isotope records (C, N, S, O, H, Sr) have been largely used in reconstruction of marine and continental palaeoenvironments. The session will address changing at different time scale (Phanerozoic, Mezozoic, Cenozoic) and how and why the environmental conditions have varied from icehouse to greenhouse, from oxic to anoxic. This session invites: 1. Contributions that brings together various continental and marine isotope records in order to explore the evolution of Earth and life over time; 2. Contribution that use stable isotope as well as other records in order to correlate stratigraphic sequences formed in a variety of settings. We are especially interested in contributions that use stable isotopes as well as palaeontological, mineralogical, major and minor elements, etc in order to elucidate the interreaction betwen the earth-ocean-atmosphere and the palaeoclimatic response.

- Tree rings and isotopes, a multi proxy matrix reflecting paleo climatic, natural environmental infuences and anthropogenic impacts:
The yearly produced biomass of trees is reflected in the tree rings, either in tree ring width and density or in the isotopic composition of the organic matter. As photosynthesis, the key process for carbon acquisition is influenced by numerous environmental parameters, such as light, temperature, humidity, CO2 and water availability, or anthropogenic impacts like air pollutants, forest utilization and management these changes leave their specific finger prints in the tree ring proxies. While tree ring width directly reflects growth it does not provide any information about the kind of impact. Here the isotopes (stable or radioactive like 14C) are a good indicator for qualitative evaluations and allow the identification of the kind of impact, which results in the variation of the tree ring proxies.
This section of the session is open for contributions which present results using of isotopes from tree ring material to study and reconstruct environmental changes in the far and near past.