Variation of sea ice and perspectives of the Northwest Passage in the Arctic Ocean  

作　　者：CHEN Jin-Lei KANG Shi-Chang GUO Jun-Ming XU Min ZHANG Zhi-Min 

机构地区：[1]State Key Laboratory of Cryosphere Sciences,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou,730000,China [2]Centre for Excellence in Tibetan Plateau Earth Sciences,Chinese Academy of Sciences,Beijing,100101,China [3]Gansu Construction Vocational Technology College,Lanzhou,730000,China

出　　处：《Advances in Climate Change Research》2021年第4期447-455,共9页气候变化研究进展（英文版）

基　　金：the National Natural Science Foundation of China(42005075,41721091);the Frontier Science Key Project of CAS(QYZDY-SSW-DQC021);the State Key Laboratory of Cryospheric Science(SKLCS-ZZ-2021);Foundation for Excellent Youth Scholars of Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences(FEYS2019020).

摘　　要：The continued warming of the Arctic atmosphere and ocean has led to a record retreat of sea ice in the last decades.This retreat has increased the probability of the opening of the Arctic Passages in the near future.The Northwest Passage(NWP)is the most direct shipping route between the Atlantic and Pacific Oceans,producing notable economic benefits.Decadal variations of sea ice and its influencing factors from a high-resolution unstructured-grid finite-volume community ocean model were investigated along the NWP in 1988-2016,and the accessibility of the NWP was assessed under shared socioeconomic pathways(SSP245 and 585)and two vessel classes with the Arctic transportation acces-sibility model in 2021-2050.Sea ice thickness has decreased with increasing seawater temperature and salinity,especially within the Canadian Arctic Archipelago(CAA)in 1988-2016,which has facilitated the opening of the NWP.Complete ship navigation is projected to be possible for polar class 6 ships in August-December in 2021-2025,after when it may extends to July under SSP585 in 2026-2030,while open water ships will not be able to pass through the NWP until September in mid-21st century.The navigability of the NWP is mainly affected by the ice within the CAA.For the accessibility of the Parry Channel,the west part is worse than that of the eastern part,especially in the Viscount-Melville Sound.

关 键 词：ARCTIC Sea ice Northwest passage Canadian arctic archipelago STRAIT 

分 类 号：P731.15[天文地球—海洋科学]