title: Shifting El Niño inhibits summer Arctic warming and Arctic sea-ice melting over the Canada Basin.
abstract: Arctic climate changes include not only changes in trends and mean states but also strong interannual variations in various fields. Although it is known that tropical-extratropical teleconnection is sensitive to changes in flavours of El Niño, whether Arctic climate variability is linked to El Niño, in particular on interannual timescale, remains unclear. Here we demonstrate for the first time a long-range linkage between central Pacific (CP) El Niño and summer Arctic climate. Observations show that the CP warming related to CP El Niño events deepens the tropospheric Arctic polar vortex and strengthens the circumpolar westerly wind, thereby contributing to inhibiting summer Arctic warming and sea-ice melting. Atmospheric model experiments can generally capture the observed responses of Arctic circulation and robust surface cooling to CP El Niño forcing. We suggest that identification of the equator-Arctic teleconnection, via the 'atmospheric bridge', can potentially contribute to improving the skill of predicting Arctic climate.
authors.affiliation: Institute of Earth Climate and Environment System, Sun Yat-sen University, 135 West Xingang Road, Guangzhou, Guangdong 510275, China.|School of Atmospheric Sciences, Nanjing University, Nanjing, Jiangsu 210023, China.
authors.forename: Chundi
authors.initials: C
authors.lastname: Hu
authors.affiliation: Institute of Earth Climate and Environment System, Sun Yat-sen University, 135 West Xingang Road, Guangzhou, Guangdong 510275, China.|School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510275, China.|Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Sun Yat-sen University, Guangzhou, Guangdong 510275, China.
authors.forename: Song
authors.initials: S
authors.lastname: Yang
authors.affiliation: School of Atmospheric Sciences, Nanjing University, Nanjing, Jiangsu 210023, China.
authors.forename: Qigang
authors.identifier: 0000-0002-6958-867X
authors.initials: Q
authors.lastname: Wu
authors.affiliation: Institute of Earth Climate and Environment System, Sun Yat-sen University, 135 West Xingang Road, Guangzhou, Guangdong 510275, China.|School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510275, China.
authors.forename: Zhenning
authors.initials: Z
authors.lastname: Li
authors.affiliation: School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510275, China.
authors.forename: Junwen
authors.initials: J
authors.lastname: Chen
authors.affiliation: Institute of Earth Climate and Environment System, Sun Yat-sen University, 135 West Xingang Road, Guangzhou, Guangdong 510275, China.|School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510275, China.
authors.forename: Kaiqiang
authors.initials: K
authors.lastname: Deng
authors.affiliation: Institute of Earth Climate and Environment System, Sun Yat-sen University, 135 West Xingang Road, Guangzhou, Guangdong 510275, China.|School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510275, China.
authors.forename: Tuantuan
authors.initials: T
authors.lastname: Zhang
authors.affiliation: Institute of Earth Climate and Environment System, Sun Yat-sen University, 135 West Xingang Road, Guangzhou, Guangdong 510275, China.|Climate Center, Guangxi Meteorological Bureau, Nanning, Guangxi 530022, China.
authors.forename: Chengyang
authors.initials: C
authors.lastname: Zhang