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北極東北航道通航窗口計(jì)算與分析

單位：1. 中國石油大學(xué)(華東)海洋與空間信息學(xué)院, 山東青島 266580;
2. 青島中科藍(lán)底信息科技有限公司, 山東青島 266555

分類號：P731.32;P727

出版年·卷·期（頁碼）：2025·42·第一期（23-31）

摘要：

使用美國冰雪中心發(fā)布的海冰密集度數(shù)據(jù)集，對1979－2022年北極區(qū)域海冰密集度數(shù)據(jù)進(jìn)行時空分析；提出基于Dijkstra最短路徑算法的通航窗口改進(jìn)算法，計(jì)算并分析了東北航道的通航窗口，確定了通航航道及周期；進(jìn)一步分析并確定了影響東北航道通航性的關(guān)鍵區(qū)域。研究結(jié)果表明：1979－2022年北極區(qū)域海冰密集度持續(xù)減少，年減少約0.18%；1979－2022年間共有25年存在通航窗口，平均通航窗口起始多在7月下旬—8月上旬，結(jié)束多在10月上中旬，周期變化較大；影響東北航道通航期的關(guān)鍵區(qū)域?yàn)橹卸魏Ｓ颉?/td>

This paper used the sea ice concentration data set released by the National Snow and Ice Data Center to conduct spatiotemporal analysis of sea ice concentration data in the Arctic region from 1979 to 2022; An improved navigation window algorithm based on Dijkstra shortest path algorithm was proposed. The navigation window of the Northeast Passage was calculated, and the navigation channel and period were determined. The key areas affecting the navigability of the Northeast Passage are further analyzed. The results show that: the annual average sea ice concentration in the Arctic region decreased by about 0.18% per year. There were 25 years of navigable windows during 1979—2022. The average start period of navigable windows was late July to early August, and the end period of navigable windows was early and middle October. The cycle of navigable windows changed largely. The key area affecting the navigation period of the Northeast Passage is the middle section.

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