Focus 3 - Global Earth-System Dynamics
Structure of Focus 3, showing the Themes (green boxes) and Working Groups (grey text), and overlap with external programs (white boxes).
This focus looks at interactions between components of the Earth System (atmosphere, biosphere, cryosphere, hydrosphere) and the links between regional- and global-scale changes.
It hosts activities to synthesize records at the global scale, acting as a counterpart to the regional studies of Focus 2 and to the forcings addressed in Focus 1.
Working groups address global-scale Earth System changes and their underlying processes, including their response to changes in forcings, internal feedbacks and teleconnections.
- How do large-scale changes in the Earth System affect regional climatic and environmental conditions?
- How have regions or Earth System components interacted to produce climate and environmental variations on a global scale?
- What are the causes and thresholds of rapid transitions between quasi-stable climatic and environmental states, in particular on timescales that are relevant to society? How reversible are abrupt climate changes?
Although processes that, by definition, involve the whole Earth System are difficult to divide into packets, we consider the science of this focus under four themes:
- Variability of the Hydrological Cycle
> ADOM (Atmospheric circulation dynamics during the last glacial cycle: Observations and modeling)
> NICOPP (Nitrogen Cycle in the Ocean, Past and Present)
> PIGS (Past Interglacials)
> SynTraCE-21 (Synthesis of Transient Climate Evolution of the last 21-kyr)