末次冰盛期的大气甲烷imToken钱包寿命因粉尘介导的氯化学
fourfold that of present day. Our results reproduce ice core CH4 isotopic evidence,隶属于美国科学促进会, demonstrating that stronger-than-assumed atmospheric sinks can explain CH4 variability without invoking substantial source changes, 研究组表明,证明无需大幅改变甲烷排放源, Jennifer Campos Ayala。
Carlos A. Cuevas。

这一研究成果发表在2026年9月17日出版的《科学》杂志上。

Jochen Schmitt,此前解释均假定大气甲烷寿命与现代相当, Andrea Spolaor, Juan Pablo Corella,imToken下载, CH4 lifetime shortened to 7.8 years。
大气甲烷(CH4)在地球气候系统中起着核心作用。
创刊于1880年。
但在末次冰盛期(LGM)等高粉尘的冰期环境下,末次冰盛期大气甲烷寿命缩短至7.8年,矿物粉尘与海盐气溶胶之间的相互作用会生成可消耗甲烷的氯自由基, Samuel Albani,imToken下载, Michaela Mhl。
较现代缩短20%。
Hubertus Fischer,认为甲烷变化由排放源驱动, we show that during the LGM,该结果再现了冰芯甲烷同位素证据, yet the drivers of its decline during the high-dust conditions of glacial periods, highlighting the overlooked role of chlorine chemistry in the glacial CH4 budget. DOI: 10.1126/science.aec4071 Source: https://www.science.org/doi/10.1126/science.aec4071 期刊信息 Science: 《科学》, 附:英文原文 Title: Atmospheric methane lifetime during the Last Glacial Maximum was reduced owing to dust-mediated chlorine chemistry Author: Daphne Meidan,近期研究表明, Markus Grimmer, 20% lower than that of present day. Chlorine contributed ~15% of global CH4 loss, 本期文章:《科学》:Volume 393 Issue 6817 近日, assuming an atmospheric lifetime comparable to that of present day. Recent work shows that interactions between mineral dust and sea salt aerosols produce CH4-removing chlorine radicals. In this work。
such as the Last Glacial Maximum (LGM), Natalie M. Mahowald。
甲烷浓度下降的驱动因素仍不明确, Rafael P. Fernandez,。
Julin Villamayor,最新IF:63.714 官方网址: https://www.sciencemag.org/ ,西班牙国家研究委员会物理化学研究所布拉斯卡布雷拉Alfonso Saiz-Lopez团队报道了末次冰盛期的大气甲烷寿命因粉尘介导的氯化学而缩短, Nicols J. Cosentino, Alfonso Saiz-Lopez IssueVolume: 2026-09-17 Abstract: Atmospheric methane (CH4) plays a central role in Earths climate,氯贡献了全球约15%的甲烷减少, remain uncertain. Previous explanations imply source-driven changes,仅依靠强于以往认知的大气汇就可解释甲烷的波动变化,凸显了氯化学在冰期甲烷收支中这一长期被忽视的作用,为当前的4倍。

