Abstract
AbstractThe responses of the Earth’s climate system to positive and negative CO2 emissions are not identical in magnitude, resulting in hysteresis. In particular, the degree of global precipitation hysteresis varies markedly among Earth system models. Based on analysis of Earth’s energy budget, here we show that climate sensitivity controls the degree of global precipitation hysteresis. Using an idealized CO2 removal scenario, we find that the surface available energy for precipitation continues to increase during the initial negative CO2 emission period following a positive CO2 emission period, leading to a hysteresis of global precipitation. This feature is more pronounced in Earth System Models with a high climate sensitivity. Our results indicate that climate sensitivity is a key factor controlling the hysteresis behavior of global precipitation in a changing CO2 pathway. Therefore, narrowing the uncertainty of climate sensitivity helps improve the projections of the global hydrological cycle.
Funder
National Research Foundation of Korea
Publisher
Springer Science and Business Media LLC
Subject
Atmospheric Science,Environmental Chemistry,Global and Planetary Change
Reference60 articles.
1. Armstrong McKay, D. I. et al. Exceeding 1.5° C global warming could trigger multiple climate tipping points. Science 377, eabn7950 (2022).
2. Lenton, T. M. et al. Tipping elements in the Earth’s climate system. Proc. Natl. Acad. Sci. USA 105, 1786–1793 (2008).
3. Steffen, W. et al. Trajectories of the Earth system in the Anthropocene. Proc. Natl. Acad. Sci. USA 115, 8252–8259 (2018).
4. Lee, J.-Y. et al. Future global climate: scenario-based projections and near-term information. in Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovermental Panel on Climate Change (eds Masson-Delmotte, V. et al.) 553–672 (Cambridge University Press, 2021).
5. Lenton, T. M. et al. Climate tipping points—too risky to bet against. Nature 575, 592–595 (2019).
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