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Black carbon (BC) plays a vital role in Arctic warming.Extensiveinvestigations have been conducted to elucidate the source-receptorrelationships of BC between the Arctic and mid-/high-latitude sources.However, it is unclear to what extent source relocation under globalizationcould disturb Arctic BC contamination and climate forcing from anthropogenicBC emissions. Here, we show that the global supply chain (GSC) relocationfeatured by the southward shift of industries from high-latitude developedcountries to low-latitude developing countries markedly reduces theBC burden in the Arctic using a global chemical transport model (GEOS-Chem)and a multiregional input-output analysis (MRIO). We find thatArctic annual mean BC concentration associated with the GSC relocationdrops by similar to 15% from the case without the GSC relocation. Thetotal net BC level declines 7% over the entire Arctic and 16% in theEuropean Arctic. We also observed markedly declining BC depositionas well as direct and snow albedo radiative forcing in the Arctic.We show that the Arctic BC burden would be further reduced by decreasingBC emissions in China, attributable to its emission reduction andongoing shift of the GSC from China to southern and southeastern Asia. The global supply chain relocation fromhigh-latitude Europeto low mid-latitude Asian countries markedly reduces black carbonburden and snow albedo radiative forcing in the Arctic.

来源平台：ENVIRONMENTAL SCIENCE & TECHNOLOGY