Dissolved organic carbon and nitrogen release from boreal Holocene permafrost and seasonally frozen soils of Alaska
Dates
Publication Date
2018-07-12
Start Date
2007-04-02
End Date
2007-04-05
Citation
Wickland, K.P., Waldrop, M.P., Koch, J.C., Aiken, G.R., Jorgenson, M.T., and Striegl, R.G., 2018, Dissolved organic carbon and nitrogen release from boreal Holocene permafrost and seasonally frozen soils of Alaska: U.S. Geological Survey data release, https://doi.org/10.5066/P9GG07SD.
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, [...]
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.
The purpose of the Data Release is to provide the analytical data used to quantify the amounts of dissolved organic carbon and dissolved nitrogen that were released from permafrost and seasonally-thawed soils collected from interior boreal Alaska upon thaw, and to describe the optical properties and dissolved organic carbon biodegradability of the soil leachate solutions.
