Greenhouse Gas Emissions from Global Cities Under SSP/RCP Scenarios, 1990 to 2100

This is a Preprint and has not been peer reviewed. This is version 1 of this Preprint.

Downloads

Download Preprint

Authors

Kevin Robert Gurney, Siir Kilkis, Karen Seto, Shuaib Lwasa, Daniel Moran, Keywan Riahi, Meredith Keller, Peter Rayner, Muhammed Luqman

Abstract

Projections of greenhouse gas (GHG) emissions are critical to better understanding and anticipating future climate change under different socio-economic conditions and mitigation strategies. The climate projections and scenarios assessed by the Intergovernmental Panel on Climate Change, following the Shared Socioeconomic Pathway (SSP)-Representative Concentration Pathway (RCP) framework, have provided a rich understanding of the constraints and opportunities for policy action. However, the current emissions scenarios lack an explicit treatment of urban emissions within the global context. Given the pace and scale of urbanization, with global urban populations expected to increase from about 4.4 billion today to about 7 billion by 2050, there is an urgent need to fill this knowledge gap. Here, we estimate the share of global GHG emissions emanating from urban areas from 1990 to 2100 based on the SSP-RCP framework. The urban GHG emissions are presented in five regional aggregates and are based on a combination of the urban population share, 2015 urban per capita CO2eq emissions, SSP-based national CO2eq emissions, and recent analysis of urban per capita CO2eq trends. We find that urban areas account for the majority of global GHG emissions in 2015 (61.8%). Moreover, the urban share of global GHG emissions progressively increases into the future, exceeding 80% in some scenarios by the end of the century. The combined urban areas in Asia and Developing Pacific, and Developed Countries account for 65.0% to 73.3% of cumulative urban emissions between 2020 and 2100 across the scenarios. Given these dominant roles, we describe the implications to potential urban mitigation in each of the scenario narratives in order to meet the goal of climate neutrality within this century.

DOI

https://doi.org/10.31223/X5Z639

Subjects

Social and Behavioral Sciences

Keywords

emission scenarios, carbon footprint, urban emissions, GHG emissions

Dates

Published: 2021-10-28 07:55

Last Updated: 2021-10-28 14:55

License

CC BY Attribution 4.0 International

Additional Metadata

Conflict of interest statement:
Authors have no conflict of interest

Data Availability (Reason not available):
all data will be available upon publication of manuscript

Add a Comment

You must log in to post a comment.


Comments

There are no comments or no comments have been made public for this article.