This study examines the implications of Russia's full-scale invasion of Ukraine for the international mobility of Ukrainian scholars. The dataset, drawn from the CWTS in-house Scopus database, includes Ukrainian scholars who were internationally mobile between 2020 and 2023. The analysis focuses on scholars affiliated with universities and the National Academy of Sciences of Ukraine (NASU) prior to moving abroad. The findings reveal an increase in the number of internationally mobile scholars in 2022-2023, driven primarily by rising mobility from universities. For NASU-affiliated scholars, Russia was the top destination country in 2020-2021 but fell to fourth place in 2022-2023, overtaken by Germany, China, and Poland. For university-affiliated scholars, Poland, Germany, and Russia consistently ranked as the top three destination countries across both periods. Statistical tests indicate no significant difference in mean Field-Weighted Citation Impact (FNCI) between scholars who were internationally mobile in 2020-2021 and those mobile in 2022-2023. However, the share of internationally mobile scholars with articles among the top 10% most cited globally increased among those previously affiliated with universities, while it declined among those affiliated with NASU. In both periods, the proportion of scholars with articles in the top 10% most cited globally, published during the five years prior to changing their country of affiliation, was higher among internationally mobile scholars than among those who remained affiliated with Ukrainian institutions. Whether this mobility constitutes a brain drain requires further research. If effectively leveraged, international mobility may strengthen Ukraine's integration into global scientific networks, support post-war recovery, and contribute to a more resilient, internationally connected, and competitive academic system.

翻译：本研究探讨了俄罗斯全面入侵乌克兰对乌克兰学者国际流动的影响。数据集来源于CWTS内部Scopus数据库，包含2020年至2023年间具有国际流动经历的乌克兰学者。分析聚焦于移居国外前隶属于乌克兰各大学及乌克兰国家科学院（NASU）的学者。研究结果显示，2022-2023年国际流动学者数量有所增加，主要驱动力来自大学学者流动率的上升。对于NASU隶属学者，俄罗斯在2020-2021年曾是首要目的地国，但在2022-2023年降至第四位，被德国、中国和波兰超越。对于大学隶属学者，波兰、德国和俄罗斯在两个时期始终位列前三目的地国。统计检验表明，2020-2021年国际流动学者与2022-2023年流动学者的平均领域加权引文影响力（FWCI）无显著差异。然而，在先前隶属于大学的学者中，其全球被引前10%论文的学者比例有所上升，而NASU隶属学者的该比例则出现下降。在两个时期中，在变更隶属国前五年内发表过全球被引前10%论文的学者比例，在国际流动学者群体中均高于保持乌克兰机构隶属关系的学者群体。此类流动是否构成人才流失仍需进一步研究。若能有效利用，国际流动或将加强乌克兰与全球科学网络的融合，支持战后重建，并助力构建更具韧性、国际连通性和竞争力的学术体系。