In the 4C project, we work to better understand how emissions affect atmospheric concentrations and lead to temperature rise. 4C will inform the Global Stocktake and help policy makers and governments take the appropriate measures to keep global warming below the Paris Agreement’s threshold of 2ºC.

Short-term variations in atmospheric CO₂ levels are caused by natural processes or human activities. This classroom discusses these drivers to better understand what affects changes in CO₂ levels and why this is relevant for the political agenda.

The global carbon cycle involves complex processes and interactions within the Earth system, and understanding these is crucial for climate change mitigation and adaptation. This classroom explains the most important aspects of the carbon cycle and how it is affected by changes in CO₂ concentrations.

Jens Terhaar from the University of Bern gives a brief introduction into the undestainties in the ocean sinks and he is working to reduce these. In this series of videos, 4C scientists give an insight into the scientific background behind their research, and explain the work they do in the project.

The latest socioeconomic scenarios used in climate change research examine how global society, demographics and economics could change over the 21st century.