Dissolved organic carbon and nitrogen release from boreal Holocene permafrost and seasonally frozen soils of Alaska

Permafrost (perennially frozen) and active-layer (seasonally thawed) soils varying in soil carbon (C) and nitrogen (N) content and radiocarbon age were collected from three sites in interior Alaska to determine potential release of dissolved organic carbon (DOC), total dissolved N (TDN), dissolved o...

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Bibliographic Details
Main Authors: Wickland, Kimberly P., Waldrop, Mark P., Koch, Joshua C., Aiken, George R., Jorgenson, M. Torre, Striegl, Rob
Format: Dataset
Language:unknown
Published: U.S. Geological Survey 2018
Subjects:
Ecology,Soil Sciences,Water Quality
permafrost
Alaska
Online Access:https://dx.doi.org/10.5066/p9gg07sd
https://www.sciencebase.gov/catalog/item/5afb7c8fe4b0da30c1b9c9df
Description
Summary:Permafrost (perennially frozen) and active-layer (seasonally thawed) soils varying in soil carbon (C) and nitrogen (N) content and radiocarbon age were collected from three sites in interior Alaska to determine potential release of dissolved organic carbon (DOC), total dissolved N (TDN), dissolved organic nitrogen (DON), and dissolved inorganic nitrogen (DIN) upon thaw. Soil cores were cut into 15 cm thick sections, and deep active-layer (15-30 cm above the permafrost boundary) and shallow permafrost (15-30 cm below the permafrost boundary) sections were thawed and leached with deionized water. Soil leachates were analyzed for DOC, TDN, nitrate (NO3-), and ammonium (NH4+) concentrations, dissolved organic matter optical properties, and DOC biodegradability. Soils were analyzed for moisture content, bulk density, C, N, and radiocarbon content. Releases of dissolved carbon and nitrogen from soils are expressed as yields, with the units of milligrams (DOC, TDN, DIN, DON) per gram dry soil.

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