热喀斯特湖在变暖世界中的作用。
Roles of Thermokarst Lakes in a Warming World.
机构信息
Department of Microbiology, Institute for Water and Wetland Research, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, the Netherlands; Netherlands Earth System Science Center, Utrecht University, Heidelberglaan 2, 3584 CS, Utrecht, the Netherlands.
GFZ German Research Centre for Geosciences, Section 3.7 Geomicrobiology, Telegrafenberg, 14473 Potsdam, Germany; University of Potsdam, Institute of Biochemistry and Biology, 14469 Potsdam, Germany.
出版信息
Trends Microbiol. 2020 Sep;28(9):769-779. doi: 10.1016/j.tim.2020.04.002. Epub 2020 Apr 30.
Permafrost covers a quarter of the northern hemisphere land surface and contains twice the amount of carbon that is currently present in the atmosphere. Future climate change is expected to reduce its near-surface cover by over 90% by the end of the 21st century, leading to thermokarst lake formation. Thermokarst lakes are point sources of carbon dioxide and methane which release long-term carbon stocks into the atmosphere, thereby initiating a positive climate feedback potentially contributing up to a 0.39°C rise of surface air temperatures by 2300. This review describes the potential role of thermokarst lakes in a warming world and the microbial mechanisms that underlie their contributions to the global greenhouse gas budget.
多年冻土覆盖了北半球陆地表面的四分之一，其碳含量是目前大气中碳含量的两倍。预计未来气候变化将导致 21 世纪末其近地表覆盖减少 90%以上，从而形成热喀斯特湖。热喀斯特湖是二氧化碳和甲烷的点源，它们将长期碳储量释放到大气中，从而引发正的气候反馈，可能导致到 2300 年地表空气温度升高 0.39°C。本综述描述了热喀斯特湖在全球变暖中的潜在作用，以及其对全球温室气体预算贡献的微生物机制。
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