YSM01: Climate system dynamics
This session welcomes papers aiming for a more accurate understanding of the processes at work in the climate system, both at the regional and the global scale, covering timescales of a few centuries to several million years. In particular, we invite presentations contributing to improve reconstruction of the past climate state through various climate parameters (high resolution, well dated, wide coverage), such as temperature, precipitation, atmospheric pressure field, sea ice coverage, ocean circulation and sea level. It includes presentations studying the underlying processes of the Earth system changes, including their response to changes in forcings, internal feedbacks and teleconnections. This session also aims to promote data-model comparison.
YSM02: Biosphere and ecosystem dynamics
This session is dedicated to diagnosing the global behavior of both marine and terrestrial ecosystems in different timescales and their responses to global change. In particular, we invite presentations contributing to the understanding of the biophysical interactions and the biogeochemical exchanges with the atmosphere and the oceans, with special focus on the global carbon cycle. Contributions on vegetation history and biotic response to climate, in particular at the regional level, are also welcome.
YSM03: Human-Climate-Ecosystem interactions
This session addresses long-term interactions between past climate conditions, environmental changes and human activities. We invite papers dealing with the interactions between the biosphere system and the climate system, as well as their feedbacks. Studies about societal impacts of these environmental changes and the ecological impacts of human activities from local to regional scale are encouraged. Reconstruction of the human, climate and ecosystem components of the Earth system and their interactions using natural archives, documentary and instrumental data, historical, paleoecological and archaeological records are invited.
YSM04: Abrupt changes and threshold responses
This session focuses on abrupt changes and thresholds in the Earth system. Special attention will be given to early warning that can strengthen our ability to successfully predict these abrupt changes and thresholds. We invite studies of geological, chemical and biological records that capture large-scale, abrupt shifts in environmental and climate systems. Studies about regions highly sensitive to abrupt changes and prone to strong positive feedback are welcome. Studies of early warning signals of approaching tipping points in the Earth system based on accurate and well-dated reconstructions of the past behavior of climatic, environmental and archeological systems, used to better understand the underlying mechanisms and test models of future change, are encouraged.
This session welcomes papers about research on modeling the different components of the Earth system; i.e. atmosphere, hydrosphere, cryosphere, pedosphere and biosphere. In particular, we invite papers about the most recent developments in the representation of these components, the interactions between them and the mutual impact with human societies. It includes both global and regional modeling.
YSM06: New technical and methodological development in past global changes
Numerous tools are continuously developed to improve our knowledge of past global changes. In particular, high resolution long-term records of independently and accurately dated reconstructions are extremely valuable. Moreover, new proxies are continuously being searched for to reconstruct past global changes. This session invites papers dealing with the new tools allowing a better understanding of the interactions and the processes at work in the Earth System. It includes absolute and relative dating, built up of highly reliable timescales, new approaches to improve coherent chronologies, efforts on interpretation and development of new proxies, and calibration refinements.