Core Insights - The Antarctic sea ice extent reached a winter peak of 17.81 million square kilometers on September 17, 2023, which is significantly lower than the normal levels observed in previous years [2] - This year's peak is only slightly above the levels recorded in 2023 and 2024, marking it as the third lowest since satellite observations began [1][2] - The trend of declining Antarctic sea ice extent has been noted since August 2016, with most years showing a downward trajectory, potentially linked to warming ocean surface temperatures [2] Summary by Sections - **Current Sea Ice Extent**: The Antarctic sea ice extent peaked at 17.81 million square kilometers, which is far below the normal levels [2] - **Historical Context**: The lowest recorded winter peak was in 2023 at 16.96 million square kilometers, indicating a concerning trend in sea ice reduction [2] - **Climate Change Impact**: The reduction in sea ice is believed to diminish Antarctica's ability to reflect sunlight, potentially exacerbating global warming [2]

依据该研究中心对卫星数据的初步分析，南极今冬海冰范围在9月17日达到峰值，为1781万平方公里， 远低于往年正常水平。自1979年有卫星观测数据以来，南极海冰范围冬季峰值最低纪录出现在2023年， 为1696万平方公里。 【新华社微特稿】美国国家冰雪数据研究中心9月30日说，今年南极海冰范围冬季峰值仅略高于2023年 和2024年水平，为有卫星观测数据记录以来第三低，凸显气候变化对南极的影响。 依据美国国家冰雪数据研究中心的说法，南极海冰范围曾在数十年间长期保持稳定，甚至略有扩大。然 而自2016年8月以来，情况发生了变化，多数年份南极海冰范围呈下降趋势。一些研究认为，这一趋势 与接近海洋表面的海水变暖有关。海冰减少意味着南极洲反射阳光的能力减弱，可能助推变暖趋势。 （完）（王鑫方） 南极海冰范围通常在南半球冬季接近尾声的9月前后达到顶峰，然后逐渐缩小，在南半球夏末的2月或3 月达到最低点。 ...