Abstract
Climate change may amplify the frequency and severity of supply–demand mismatches in future power systems with high shares of wind and solar energy1,2. Here we use a dispatch optimization model to assess potential increases in hourly costs associated with the climate-intensified gaps under fixed, high penetrations of wind and solar energy generation. We further explore various strategies to enhance system resilience in the face of future climate change. We find that extreme periods—defined as hours in the upper decile of hourly costs (that is, the most costly 10% of hours)—are likely to become more costly in the future in most countries, mainly because of the increased need for investments in flexible energy capacity. For example, under the Shared Socioeconomic Pathway SSP1–2.6 scenario, 47 countries that together account for approximately 43.5% of global future electricity generation are projected to experience more than a 5% increase in average hourly costs during extreme periods, with the largest reaching up to 23.7%. The risk of rising costs could be substantially mitigated through tailored, country-specific strategies involving the coordinated implementation of multiple measures to address supply–demand imbalances and enhance system flexibility. Our findings provide important insights for building future climate-resilient power systems while reducing system costs.
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Data availability
All the raw CMIP6 future climatic data in the study are publicly available from the Earth System Grid Federation repository (https://esgf-node.llnl.gov/projects/cmip6/). Future shares of different electricity generation technologies for different countries under various climate scenarios are collected from the International Institute for Applied Systems Analysis (https://data.ece.iiasa.ac.at/ar6/). The derived country-level wind and solar capacity factors are available at Zenodo81 (https://doi.org/10.5281/zenodo.15499583). All maps were created based on freely available shapefiles from the Database of Global Administrative Boundaries (https://gadm.org/), using Python v.3.11 with the GeoPandas v.1.1 (https://geopandas.org/en/stable/) and Matplotlib v.3.7.1 (https://matplotlib.org/) libraries. The illustrations representing the four measures are available for free download in PNG format and were designed by Freepik (www.freepik.com). Source data are provided with this paper.
Code availability
The code for the dispatch optimization model developed in this study is available at Zenodo81 (https://doi.org/10.5281/zenodo.15499583).
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Acknowledgements
We thank the Carbon Neutrality and Energy System Transformation (CNEST) Program. This work was funded by the National Natural Science Foundation of China (grant nos. W2412154 and 72274106) and the China Meteorological Administration ‘Research on Value Realization of Climate Ecological Products’ Youth Innovation Team Project (no. CMA2024QN15). Q.Z. acknowledges the support by the New Cornerstone Science Foundation through the Xplorer Prize. We acknowledge the support from the High Performance Computing Center, Tsinghua University. We acknowledge J. Ren and X. Xin for their valuable assistance in developing the dispatch model.
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Q.Z. and D.T. conceived and designed the study. D.Z. led the model development and conducted the simulations. D.T. and Q.Z. performed the analyses with support from D.Z., X.Y., Y. Lin, J.L., P.W., Y.G., L.P., S.F., Y. Liu and J.C. on data compilation, and from S.J.D., K.C., D.C. and K.H. on analytical approaches. D.T., D.Z. and Q.Z. interpreted the results. X.Y. and D.Z. prepared the figures. D.T., D.Z., Q.Z. and S.J.D. wrote the paper with input from all co-authors.
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Extended data figures and tables
Extended Data Fig. 1 Framework for analysing strategies for climate-resilient global wind and solar power systems.
The framework comprises five key components: input, model optimization, output, post-process results, and strategy design.
Extended Data Fig. 2 Contributions to annual total system costs during extreme periods under the SSP126 and SSP245 scenarios.
In each case, the bars show the average contributions across dispatch model simulations with climate model ensembles; the vertical lines show the 33rd to 67th percentile ranges; and the horizontal lines show the median values.
Extended Data Fig. 3 Country-level average changes in power system costs induced by climate change under the SSP126 and SSP245 scenarios.
a, Average changes in system costs across dispatch model simulations with climate model ensembles under the SSP126 and SSP245 scenarios. b, Average annual additional climate-related costs under the SSP126 and SSP245 scenarios.
Extended Data Fig. 4 Technology-based drivers of cost changes induced by climate change under the SSP245 scenario.
a,b, Changes in hourly costs and their specific contributions from different technologies during extreme (a) and normal (b) periods in 26 major countries. In each case, the bars show the average changes or technology-based contributions across dispatch model simulations with climate model ensembles; the vertical lines show the 33rd to 67th percentile ranges; the horizontal lines show the median values.
Extended Data Fig. 5 Median contributions to hourly costs and supply under the SSP126 scenario by different technologies.
a,b, Median contributions to hourly costs (a) and median supply (b) across dispatch model simulations with climate model ensembles during extreme period. c,d, Median contributions to annual costs (c) and median supply (d) during normal period. Striped and solid bars in (a) and (c) represent variable and fixed costs, respectively. It is noted that optimized wind/solar generation ratio varies across different years and climate models.
Extended Data Fig. 6 Effectiveness of strategies to reduce climate-driven increase in hourly costs (%) at the 50% likelihood level under the SSP245 scenario.
The digits represent the 50th percentile of relative cost reductions (%) across dispatch model simulations with climate model ensembles in 26 major countries, calculated as the difference between average hourly costs in the baseline and after implementation of one or more strategies under future climate (2056–2060).
Extended Data Fig. 7 Reduction potentials in future hourly costs of strategies during extreme periods under the SSP126 scenario.
In each case, the bars show the average reductions in hourly costs across various combinations of measures; the vertical lines show the 33rd to 67th percentile ranges of dispatch model simulations with climate model ensembles; and the horizontal lines show the median values.
Extended Data Fig. 8 Reduction potentials in future hourly costs under different number of mitigation measures under the SSP126 scenario.
Points represent average increases in hourly costs due to climate change, while the vertical lines show the median values, and the horizontal lines show the 33rd to 67th percentile ranges of dispatch model simulations with climate model ensembles. Bars depict the maximal cost reduction under a certain number of mitigation measures at a 50% likelihood.
Extended Data Fig. 9 The distribution of cost changes under the SSP126 scenarios.
In each case, the bars show the average changes in hourly costs across dispatch model simulations with climate model ensembles; the vertical lines show the 33rd to 67th percentile ranges; the horizontal lines show the median values; the circle and cross markers on the scatterplot represent the 95th percentiles and the maximum values.
Extended Data Fig. 10 The likelihood of different numbers of measures mitigating the top 5% of events with the largest cost increases under the SSP245 scenario.
The red lines represent the relationship between the number of measures (ranging from 1 to 4) and the likelihood of mitigating hourly cost increases in the top 5% of events with the largest cost increases (that is, those above the 95th percentile of dispatch model simulations with climate model ensembles) during extreme and normal periods.
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Zheng, D., Yan, X., Tong, D. et al. Strategies for climate-resilient global wind and solar power systems. Nature 643, 1263–1270 (2025). https://doi.org/10.1038/s41586-025-09266-7
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DOI: https://doi.org/10.1038/s41586-025-09266-7