A Polycentric Approach to Global Climate Governance

As international climate negotiations under the UNFCCC have adopted the goal to limit the increase in global mean temperature to well below 2 degrees C, a highly differentiatedbut largely uncoordinatedglobal climate governance system has emerged. Although coordinated global collective action for mitigating climate change sufficiently to meet the 2 degrees-C goal is still lacking, a multitude of multilateral, minilateral, transnational, national, subnational, and nonstate actors have emerged. This article offers a critical specification of the attempt by Elinor Ostrom and those influenced by her in the literature to conceptualize this climate governance reality as a polycentric approach. We claim that the concept of polycentricity offers high descriptive value for understanding the horizontal and vertical differentiations of current climate governance, and present systematic analysis of a polycentric approach to deliberately enhance the design of the emerging global climate governance architecture. To systematize the Ostromean literature on polycentric climate governance, we identify and specify four key features for climate mitigation governance and their related mechanisms: an emphasis on self-organization, a recognition of site-specific conditions, the facilitation of experimentation and learning, and the building of trust. After discussing objections to a polycentric approach, we conclude by tentatively evaluating its potential to enhance the effectiveness of climate mitigation, and identify central tasks for the efficient design of a polycentric global climate governance regime.