气候变化领域集成服务门户(CCPortal): Molecular Tracing of Riverine Soil Organic Matter From the Central Himalaya

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DOI	10.1029/2020GL087403
	Molecular Tracing of Riverine Soil Organic Matter From the Central Himalaya
	Märki L.; Lupker M.; Gajurel A.P.; Gies H.; Haghipour N.; Gallen S.; France-Lanord C.; Lavé J.; Eglinton T.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:16
英文摘要	The isomer distribution of branched glycerol dialkyl glycerol tetraethers (brGDGTs) in soils has been shown to correlate to the local mean annual temperature. Here, we explore the use of brGDGT distributions as proxy for the elevation at which soil organic carbon is preferentially mobilized in the Central Himalaya. Soil brGDGT distributions collected along an altitudinal profile, spanning elevations from 200 to 4,450 m asl, are linearly correlated to elevation. We use this calibration to trace the provenance of soil organic matter in suspended sediments of rivers draining the Himalaya. BrGDGT distributions of fluvial sediments reflect the mean elevation of the soil cover in most catchments. Inverse modeling of the brGDGT data set suggests similar relative contribution to soil organic carbon mobilization from different land covers within a factor 2. We conclude that riverine soil organic carbon export in the Himalaya mostly occurs pervasively and is at the catchment scale insensitive to anthropogenic perturbations. ©2020. The Authors.
英文关键词	Biogeochemistry; Catchments; Glycerol; Inverse problems; Organic carbon; Plants (botany); Runoff; Suspended sediments; Catchment scale; Fluvial sediment; Inverse modeling; Isomer distributions; Relative contribution; Soil organic carbon; Soil organic matters; Tetraethers; Soils; anthropogenic effect; calibration; drainage network; ether; fluvial deposit; molecular analysis; sediment chemistry; soil cover; soil organic matter; suspended sediment; Himalayas
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169931
作者单位	Geological Institute, ETH Zürich, Zürich, Switzerland; Department of Geology, Tribhuvan University, Kathmandu, Nepal; Ion Beam Physics, ETH Zürich, Zürich, Switzerland; Department of Geosciences, Colorado State University, Fort Collins, CO, United States; Centre de Recherches Pétrographiques et Géochimiques (CRPG), CNRS–Université de Lorraine, Vandœuvre-lès-Nancy, France
推荐引用方式 GB/T 7714	Märki L.,Lupker M.,Gajurel A.P.,et al. Molecular Tracing of Riverine Soil Organic Matter From the Central Himalaya[J],2020,47(16).
APA	Märki L..,Lupker M..,Gajurel A.P..,Gies H..,Haghipour N..,...&Eglinton T..(2020).Molecular Tracing of Riverine Soil Organic Matter From the Central Himalaya.Geophysical Research Letters,47(16).
MLA	Märki L.,et al."Molecular Tracing of Riverine Soil Organic Matter From the Central Himalaya".Geophysical Research Letters 47.16(2020).