气候变化领域集成服务门户(CCPortal): Small-scale hydrological patterns in a Siberian permafrost ecosystem affected by drainage

CCPortal

DOI	10.5194/bg-21-2571-2024
	Small-scale hydrological patterns in a Siberian permafrost ecosystem affected by drainage
	Raab, Sandra; Castro-Morales, Karel; Hildebrandt, Anke; Heimann, Martin; Vonk, Jorien Elisabeth; Zimov, Nikita; Goeckede, Mathias
发表日期	2024
ISSN	1726-4170
EISSN	1726-4189
起始页码	21
结束页码	10
卷号	21 期号:10
英文摘要	Climate warming and associated accelerated permafrost thaw in the Arctic lead to a shift in landscape patterns, hydrologic conditions, and release of carbon. In this context, the lateral transport of carbon and shifts therein following thaw remain poorly understood. Crucial hydrologic factors affecting the lateral distribution of carbon include the depth of the saturated zone above the permafrost table with respect to changes in water table and thaw depth and the connectivity of water-saturated zones. Landscape conditions are expected to change in the future due to rising temperatures and polygonal or flat floodplain Arctic tundra areas in various states of degradation; hydrologic conditions will also change. This study is focused on an experimental site near Chersky, northeast Siberia, where a drainage ditch was constructed in 2004 to simulate landscape degradation features that result in drier soil conditions and channeled water flow. We compared water levels and thaw depths in the drained area (dry soil conditions) with those in an adjacent control area (wet soil conditions). We also identified the sources of water at the site via stable water isotope analysis. We found substantial spatiotemporal changes in the water conditions at the drained site: (i) lower water tables resulting in drier soil conditions, (ii) quicker water flow through drier areas, (iii) larger saturation zones in wetter areas, and (iv) a higher proportion of permafrost meltwater in the liquid phase towards the end of the growing season. These findings suggest decreased lateral connectivity throughout the drained area. Shifts in hydraulic connectivity in combination with a shift in vegetation abundance and water sources may impact carbon sources and sinks as well as transport pathways. Identifying lateral transport patterns in areas with degrading permafrost is therefore crucial.
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology
WOS类目	Ecology ; Geosciences, Multidisciplinary
WOS记录号	WOS:001232845000001
来源期刊	BIOGEOSCIENCES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/303227
作者单位	Max Planck Society; Friedrich Schiller University of Jena; Helmholtz Association; Helmholtz Center for Environmental Research (UFZ); Friedrich Schiller University of Jena; University of Helsinki; Vrije Universiteit Amsterdam; Pacific Geographical Institute of the Far Eastern Branch of the Russian Academy of Sciences; Russian Academy of Sciences
推荐引用方式 GB/T 7714	Raab, Sandra,Castro-Morales, Karel,Hildebrandt, Anke,et al. Small-scale hydrological patterns in a Siberian permafrost ecosystem affected by drainage[J],2024,21(10).
APA	Raab, Sandra.,Castro-Morales, Karel.,Hildebrandt, Anke.,Heimann, Martin.,Vonk, Jorien Elisabeth.,...&Goeckede, Mathias.(2024).Small-scale hydrological patterns in a Siberian permafrost ecosystem affected by drainage.BIOGEOSCIENCES,21(10).
MLA	Raab, Sandra,et al."Small-scale hydrological patterns in a Siberian permafrost ecosystem affected by drainage".BIOGEOSCIENCES 21.10(2024).