中国石油勘探开发研究院张水昌和中国石油天然气集团孙龙德合作提出了晚白垩世冷却事件的隐藏驱动力是湖泊碳汇这一新观点。这一研究成果于2024年6月24日发表在国际顶尖学术期刊《科学通报》上。

据悉，自中生代以来，湖泊湖泊系统已经封存了大量的有机碳，这可能对全球气候降温具有重要价值，但仍然缺乏这种封存的地质证据。

本研究以中国松辽盆地为例，阐明了湖相盆地作为大量有机碳汇的重要作用，特别是当同代海相沉积物是有机碳的贫汇时。火山活动和轨道作用力可能是影响陆海水运的关键因素，也可能是影响海洋和陆地有机碳交替埋藏的关键因素。与甲烷代谢有关的微生物可能高度参与了甲烷有机碳的矿化和固存。

这项研究为陆地和海洋之间的碳-水耦合循环及其对全球气候演变的影响提供了新的见解。

附：英文原文

Title: Lacustrine carbon sink: A hidden driver of the Late Cretaceous Cooling Event

Author: Shuichang Zhang a b c, Longde Sun c d

Issue&Volume: 2024/06/24

Abstract: Lacustrine systems since the Mesozoic have sequestered large quantities of organic carbon, which may have important value for global climate cooling, but there is still a lack of geological evidence of this sequestration. Taking the Songliao Basin in China as a case study, we elucidate the important function of lacustrine basins as sinks of a large amount of organic carbon, particularly when the contemporaneous marine sediments were poor sinks of organic carbon. Volcanic activities and orbital forcing were likely key factors influencing the water transportation between the land and oceans, as well as the alternating burial of organic carbon in the oceans and land. Microorganisms related to methane metabolism may have been highly involved in the mineralization and sequestration of lacustrine organic carbon. This study provides new insights into the coupled carbon-water cycle between the land and oceans and the influence of this process on global climate evolution.

DOI: 10.1016/j.scib.2024.06.024

Source: https://www.sciencedirect.com/science/article/abs/pii/S2095927324004493