1. C. O’Grady, “Warming of 1.5°C carries risk of crossing climate tipping points,” Science 377 (6611), 1135 (2022).
2. D. I. A. McKay, A. Staal, J. F. Abrams, R. Winkelmann, B. Sakschewski, S. Loriani, I. Fetzer, S. E. Cornell, J. Rockstrom, and T. M. Lenton, “Exceeding 1.5°C global warming could trigger multiple climate tipping points,” Science 377 (6611), 1171 (2022).
3. “IPCC, 2021: Summary for policymakers,” in Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change (Cambridge University Press, Cambridge, 2021), pp. 1–41.
4. World Meteorological Organization Global Atmosphere Watch Implementation Plan: 2016–2023. Report No. 228 (WMO, 2017).
5. A. E. Andrews, J. D. Kofler, M. E. Trudeau, J. C. Williams, D. H. Neff, K. A. Masarie, D. Y. Chao, D. R. Kitzis, P. C. Novelli, C. L. Zhao, E. J. Dlugokencky, P. M. Lang, M. J. Crotwell, M. L. Fischer, M. J. Parker, J. T. Lee, D. D. Baumann, A. R. Desai, C. O. Stanier, S. F. J. De Wekker, D. E. Wolfe, J. W. Munger, and P. P. Tans, “CO2, CO, and CH4 measurements from Tall Towers in the NOAA Earth System Research Laboratory’s Global Greenhouse Gas Reference Network: Instrumentation, uncertainty analysis, and recommendations for future high-accuracy greenhouse gas monitoring efforts,” Atmos. Meas. Tech. 7 (2), 647–687 (2014).