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. 2023 Jul 6;120(28):e2300395120. doi: 10.1073/pnas.2300395120

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Copyright © 2023 the Author(s). Published by PNAS.

This article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND).

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Fig. 1. — Drought conditions and the electricity system in the western United States. (A) The declining trend of regional runoff anomalies of the western United States from 1980 to 2021. (B) Relationship between monthly hydro generation anomalies (deviations relative to the monthly mean) and monthly runoff anomalies in the western United States. (C) fossil fuel power plants in the western United States in our sample during the studied period (2001 to 2021). The western United States is divided into three electricity regions: California (CA), Northwest (NW), and Southwest (SW). Pie charts in C show the percentage of electricity generation from different generating technologies, averaged over 2001 to 2021 (the size of the pie is proportional to the total electricity generation in each region).