Explanatory variables used for the GAM analyses. Subscript t refers to year.

aTereschenko [63, http://www.pinro.ru/], bHurrell [64, https://climatedataguide.ucar.edu/sites/default/files/climate_index_files/nao_station_djfm.txt], cReport of the ICES Arctic Fisheries Working Group [65], Table 9.5 p 498, dZhukova et al., 2009 data used with permission, and eReport of the ICES Arctic Fisheries Working Group AFWG Table 9.6 p 499.Explanatory variables used for the GAM analyses. Subscript t refers to year.a 特列申科（Tereschenko）[63，http://www.pinro.ru/]、b 赫里尔（Hurrell）[64，https://climatedataguide.ucar.edu/sites/default/files/climate_index_files/nao_station_djfm.txt]、c 《国际海洋勘探理事会（ICES）北极渔业工作组报告》[65]，第9.5表，第498页、d 朱可夫等（Zhukova et al.）2009年研究数据，经许可使用，以及e 《国际海洋勘探理事会（ICES）北极渔业工作组（AFWG）报告》第9.6表，第499页。本研究用于广义加性模型（Generalized Additive Model，GAM）分析的解释变量，下标t指代年份。