Third Assessment Report on Climate Change and Cities (ARC3.3) 2022-2024

The ARC3 report series represents a collaborative effort with authors from cities in developed and developing countries around the world. The reports are the first-ever global, interdisciplinary, cross-regional, science-based assessment to address climate risks, adaptation, mitigation, and policy mechanisms relevant to cities. The assessment articulates urban climate risk frameworks and climate science for cities and derives policy implications for key urban sectors—water, energy, transportation, sanitation, public health—and the systemic issues of land use and governance. 

UCCRN is in the writing and editing stages of the Third Assessment Report on Climate Change and Cities (ARC3.3). ARC3.3 will be published as a series of reports in 2022 - 2024 by Cambridge University Press. Each Element will focus on a key facet of urban climate change, including nature-based solutions, urban planning and design, data and the role of technology, climate governance, financing climate action, among others.

ARC3.3 Elements

  • Urban Climate Science
  • Covid-19, Cities, and Climate Change
  • Urban Planning and Design*
  • Governance*, Enabling Policy Environments, and Just Transitions
  • Financing Climate Action*
  • Informality*, Equity, and Development
  • Interdependent Infrastructure Systems:  Energy, Transport, Buildings, Water, and Waste*
  • Nature-based Solutions in Urban Areas: Enhancing Capacity to Respond to Shocks and Stresses
  • Data and the Role of Technology
  • Circular Economies for Cities*
  • Perception, Communication, and Behavior
  • Special Report on Case Studies

*= Research Topic in the Cities Research and Action Agenda


Each Author Team will develop and refine 40 to 75 pages of text including synthesis and review of the latest literature and evidence related to climate change and cities. 

  • The Elements will be short, focused, and timely
  • The Elements will have a new and independent analysis of at least one dimension of the main topic
  • The independent analysis will be linked to the UCCRN Hub activities in regional cities

Author Selections

ARC3.3 Author Selections are currently ongoing for:

  • Circular Economies for Cities*
  • Data and the Role of Technology
  • Perception, Communication, and Behavior 

To learn more about the ARC3.3 author nomination process, visit the ARC3.3 Author Nomination page.