北京大学发表最新Nature论文

Core Viewpoint - The article discusses the significant increase in atmospheric methane concentrations since the Industrial Revolution and highlights recent research on the seasonal amplitude of methane, revealing contrasting trends in different geographical regions and their implications for global methane budgets [1][3]. Group 1: Research Findings - A study published by a team from Peking University in the journal Nature investigates the trends in seasonal amplitude of atmospheric methane, attributing changes to variations in methane emissions and atmospheric sinks due to reactions with hydroxyl radicals (OH) [1][3]. - The research indicates that the decrease in methane concentration amplitude in the Northern Hemisphere's high latitudes is primarily due to increased natural emissions, such as from wetlands, linked to climate warming, supporting previous studies on climate feedback [3]. - In contrast, the increase in methane concentration amplitude in subtropical and tropical regions is mainly attributed to enhanced oxidation by hydroxyl radicals (OH) [3]. Group 2: Historical Context - The findings provide independent evidence for a 10±1% increase in tropospheric OH concentration since 1984, alongside a 21±1% increase in atmospheric methane sinks, indicating a significant change in methane's atmospheric behavior [3]. - A related study from December 2022 also published in Nature highlights that the accelerated growth of atmospheric methane concentrations in 2020 was driven equally by increased natural emissions from wetlands and a decrease in tropospheric OH concentration [4].