Lake and drained lake basin systems in lowland permafrost regions
Lake and drained lake basin systems in lowland permafrost regions
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DOI：
10.1038/s43017-021-00238-9
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发表时间：
2022-01
影响因子：
42.1
通讯作者：
B. Jones;G. Grosse;L. Farquharson;P. Roy-Léveillée;A. Veremeeva;M. Kanevskiy;B. Gaglioti;A. Breen;A. Parsekian;M. Ulrich;K. Hinkel
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作者：
B. Jones;G. Grosse;L. Farquharson;P. Roy-Léveillée;A. Veremeeva;M. Kanevskiy;B. Gaglioti;A. Breen;A. Parsekian;M. Ulrich;K. Hinkel
北极和北方低地冻土区湖泊的形成、生长和排水影响着景观和生态系统过程。这些湖泊和排水湖盆（L-DLB）系统占据了北方半球环极多年冻土区的20%以上，以及海拔300 m以下地区的约50%。气候变化正在对L-DLB系统造成严重影响，并对低地冻土区的冻土动力学、生态系统功能、地球化学过程和人类生计产生影响。在这篇评论中，我们讨论了如何增加湖泊的数量作为永久冻土融化和加剧水文制度的结果，目前并没有抵消通过湖泊排水获得的土地面积，提高排水湖盆（DLB）的主导地位。从湖泊到DLB的当代过渡减少了水文储存，导致永久冻土淤积，增加了碳固存，并使北极和北方地区的栖息地多样化。然而，进一步变暖可能会抑制DLB中的冻土淤积，破坏冻土区L-DLB系统中碳通量和生态系统过程的重要微地形控制轨迹。需要进一步研究，以了解L-DLB系统的未来动态，以改善地球系统模型，永久冻土碳反馈评估，永久冻土水文联系，永久冻土地区的基础设施发展和北方社会生态系统的福祉。
The formation, growth and drainage of lakes in Arctic and boreal lowland permafrost regions influence landscape and ecosystem processes. These lake and drained lake basin (L-DLB) systems occupy >20% of the circumpolar Northern Hemisphere permafrost region and ~50% of the area below 300 m above sea level. Climate change is causing drastic impacts to L-DLB systems, with implications for permafrost dynamics, ecosystem functioning, biogeochemical processes and human livelihoods in lowland permafrost regions. In this Review, we discuss how an increase in the number of lakes as a result of permafrost thaw and an intensifying hydrologic regime are not currently offsetting the land area gained through lake drainage, enhancing the dominance of drained lake basins (DLBs). The contemporary transition from lakes to DLBs decreases hydrologic storage, leads to permafrost aggradation, increases carbon sequestration and diversifies the shifting habitat mosaic in Arctic and boreal regions. However, further warming could inhibit permafrost aggradation in DLBs, disrupting the trajectory of important microtopographic controls on carbon fluxes and ecosystem processes in permafrost-region L-DLB systems. Further research is needed to understand the future dynamics of L-DLB systems to improve Earth system models, permafrost carbon feedback assessments, permafrost hydrology linkages, infrastructure development in permafrost regions and the well-being of northern socio-ecological systems.