Near-real-time and state-level monitoring of U.S. CO2 emissions

This is a Preprint and has not been peer reviewed.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

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Authors

Chaopeng Hong, Philippe Ciais, Zhu Liu, Olivier Boucher, Wenli Zhao, Pierre Gentine , Yilong Wang, Zhu Deng, Steven J. Davis

Abstract

As the ambition and urgency of climate mitigation efforts across the U.S. increase, annual estimates of national CO2 emissions provide only vague and outdated information about changes and progress. Using near-real-time activity data compiled from numerous sources, here we present and analyze daily, state-level estimates of fossil fuel CO2 emissions from January 2019 through December 2020. Our results quantify the abrupt but temporary decreases in emissions due to the COVID-19 pandemic (particularly related to transportation in April and May of 2020), but also reveal substantial variations across states according to the stringency of their public health responses. We also find that decreases in commercial demand for natural gas and electricity were partially but not fully offset by increases in residential demands in most places. Further, the carbon intensity of electricity and the share of electricity from coal decreased in many states in the first half of 2020 as compared to 2019, but then rebounded in the second half of 2020 when natural gas prices increased. In the future, as COVID-related restrictions dissipate and energy infrastructure evolves, our data and methods will allow state policymakers and energy analysts to closely monitor emissions trends, decarbonization progress and more quickly adjust policies and programs.

DOI

https://doi.org/10.31223/X5BS5B

Subjects

Earth Sciences, Environmental Sciences, Physical Sciences and Mathematics

Keywords

Dates

Published: 2021-04-07 08:49

Last Updated: 2021-04-07 12:49

License

CC BY Attribution 4.0 International

Additional Metadata

Data Availability (Reason not available):
The state-level emission data generated by this study are available at the U.S. Carbon Monitor (https://us.carbonmonitor.org).

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