我国在北极冰区首次实现载人深潜

Group 1 - The core viewpoint of the news is that China's 15th Arctic scientific expedition, led by the icebreaker "Xuelong 2," has successfully enhanced the country's deep-sea exploration capabilities, marked by the successful manned dive of the "Jiaolong" submersible in the Arctic region [1][4]. - The expedition involved four vessels: "Xuelong 2," "Jidi," "Shenhai Yihao," and "Tansuo Sanhao," making it the largest Arctic scientific expedition conducted by China [2]. - Preliminary research during the Arctic expedition revealed significant differences in benthic organism density, biodiversity, and individual size across spatial ranges of tens to hundreds of kilometers, providing strong support for understanding the spatial distribution of polar deep-sea organisms and assessing the impact of climate change on deep-sea ecosystems [4].