Arctic sea-ice extent: No record minimum in 2023 or recent years

作     者：Ola M.Johannessen Tor I.Olaussen Ola M.Johannessen;Tor I.Olaussen

作者机构：Nansen Scientific SocietyBergenNorway Nansen Environmental and Remote Sensing CenterBergenNorway 

出 版 物：《Atmospheric and Oceanic Science Letters》 (大气和海洋科学快报（英文版）)

年 卷 期：2025年第18卷第1期

页      面：52-55页

核心收录：

学科分类：07[理学] 0707[理学-海洋科学] 

主　　题：Sea ice Arctic Minimum ice Climate 

摘      要：Arctic sea-ice extent reaches its minimum each year in September. On 11 September 2023 the minimum was 4.969 million square kilometers(***^(2)). This was not a record low, which occurred in 2012, when the minimum was 4.175 ***^(2), 0.794 ***^(2) less than the minimum in 2023. However, the ice extent had decreased by 0.432 ***^(2) compared with 2022. Nevertheless, the summer melting in 2023 was remarkably less than expected when considering the strong heat waves in the atmosphere and ocean, with record temperatures set around the world. In general, there is a high correlation between the long-term decrease in sea-ice extent and the increasing CO_(2) in the atmosphere, where the increase of CO_(2) in recent decades explains about 80% of the decrease in sea ice in September, while the remainder is caused by natural variability.