DOC, CDOM, FDOM and FTICR data of Arctic tundra soil leaching experiment ...

• Main Authors: Zhang, Xiaowen, Hutchings, Jack A, Bianchi, Thomas S, Liu, Yina, Arellano, Ana R, Schuur, Edward A G
• Format: Dataset
• Language: English
• Published: PANGAEA 2017
• Subjects: File name; File format; File size; Uniform resource locator/link to file; Core drilling; permafrost; Tundra; Yukon river; Yukon
• Online Access: https://dx.doi.org/10.1594/pangaea.874153; https://doi.pangaea.de/10.1594/PANGAEA.874153

Temperature rise in the Arctic is causing deepening of active layers and resulting in the mobilization of deep permafrost dissolved organic matter (DOM). However, the mechanisms of DOM mobilization from Arctic soils, especially upper soil horizons which are drained most frequently through a year, are poorly understood. Here, we conducted a short-term leaching experiment on surface and deep organic active layer soils, from the Yukon River basin, to examine the effects of DOM transport on bulk and molecular characteristics. Our data showed a net release of DOM from surface soils equal to an average of 5% of soil carbon. Conversely, deep soils percolated with surface leachates retained up to 27% of bulk DOM-while releasing fluorescent components (up to 107%), indicating selective release of aromatic components (e.g. lignin, tannin), while retaining non-chromophoric components, as supported by spectrofluorometric and ultra high resolution mass spectroscopic techniques. Our findings highlight the importance of ... : Supplement to: Zhang, Xiaowen; Hutchings, Jack A; Bianchi, Thomas S; Liu, Yina; Arellano, Ana R; Schuur, Edward A G (2017): Importance of lateral flux and its percolation depth on organic carbon export in Arctic tundra soil: implications from a soil leaching experiment. Journal of Geophysical Research: Biogeosciences ...