Preface to the Special Issue on Extreme Cold Events from East Asia to North America in Winter 2020/21

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Yu, Y. Y., Y. F. Li, R. C. Ren, M. Cai, Z. Y. Guan, and W. Huang, 2022: An isentropic mass circulation view on the extreme cold events in 2020/2021 winter. Adv. Atmos. Sci., in press, https://doi.org/10.1007/s00376-021-1289-2.

Zhang, X. D., Y. F. Fu, Z. Han, J. E. Overland, A. Rinke, H. Tang, T. Vihma, and M. Y. Wang, 2022a: Extreme cold events from East Asia to North America in winter 2020/21: Comparisons, causes, and future implications. Adv. Atmos. Sci., https://doi.org/10.1007/s00376-021-1229-1.

Zhang, Y. X., D. Si, Y. H. Ding, D. B. Jiang, Q. Q. Li, and G. F. Wang, 2022b: Influence of major stratospheric sudden warming on the unprecedented cold wave in East Asia in January 2021. Adv. Atmos. Sci., https://doi.org/10.1007/s00376-022-1318-9.

Zheng, F., and Coauthors, 2022a: The 2020/21 extremely cold winter in China influenced by the synergistic effect of La Niña and warm Arctic. Adv. Atmos. Sci., https://doi.org/10.1007/s00376-021-1033-y.

Zheng, F., and Coauthors, 2022b: The predictability of ocean environments that contributed to the 2020/21 extreme cold events in China: 2020/21 La Niña and 2020 Arctic sea ice loss. Adv. Atmos. Sci., https://doi.org/10.1007/s00376-021-1130-y.