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Title: Soil Carbon and Nitrogen Stocks Across Hillslopes Underlain by Continuous Permafrost in the Northern Arctic Foothills, Alaska, United States

Journal Article · · Permafrost and Periglacial Processes
DOI: https://doi.org/10.1002/ppp.2244 · OSTI ID:2439303
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [2]
  1. Department of Soil, Water and Climate University of Minnesota Twin Cities Saint Paul Minnesota USA
  2. Argonne National Laboratory Lemont Illinois USA
  3. Emeritus University of Alaska Fairbanks Fairbanks Alaska USA
+ Show Author Affiliations

ABSTRACT Constraining the variability of soil organic carbon (SOC) and total nitrogen (TN) stocks across hillslopes in Low Arctic permafrost‐affected landscapes remains a significant challenge for improving global estimates of permafrost SOC stocks. We investigated SOC and TN stocks across hillslopes at two sites in the Arctic Foothills of Alaska, United States (Happy Valley and Sagwon Hills). Average SOC and TN stocks for the 0–1‐m depth interval were high (52.0 ± 15.1 kg C m −2 and 2.74 ± 0.82 kg N m −2 ) and linearly related ( R 2  = 0.74, p  < 0.0001). Unlike soils of other permafrost and nonpermafrost landscapes, variability was greatest within rather than between hillslope positions. Furthermore, SOC and TN stocks in the surface 1 m did not exhibit strong patterns by hillslope position and were only weakly associated with major geomorphic parameters that typically predict SOC and TN stocks well in other landscapes. Although sampling at upper hillslope positions was largely limited to depths of less than 1.5 m due to the presence of coarse fragments in reworked glacial till, deeper observations at lower hillslope positions (footslopes, toeslopes, and basins) revealed significantly larger SOC stocks (92.0 ± 18.0 kg C m −2 at 2 m; 117.1 ± 10.4 kg C m −2 at 3 m). The unique small‐scale variability in ice content, cryoturbation, patterned ground, and organic layer thickness on these broad, Low Arctic sites contributes to the relatively homogeneous distribution of SOC and TN stocks across hillslope positions in the top 1 m, but a future focus on deeper sampling may reveal greater differences in SOC and TN stocks.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
2439303
Journal Information:
Permafrost and Periglacial Processes, Journal Name: Permafrost and Periglacial Processes Journal Issue: 4 Vol. 35; ISSN 1045-6740
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
United Kingdom
Language:
English

References (47)

Large uncertainty in permafrost carbon stocks due to hillslope soil deposits: HILLSLOPE, PERMAFROST, SOC journal June 2017
Effect of Terrain Characteristics on Soil Organic Carbon and Total Nitrogen Stocks in Soils of Herschel Island, Western Canadian Arctic: Geomorphic Disturbance, SOC and TN journal December 2015
Permafrost Thaw and Liberation of Inorganic Nitrogen in Eastern Siberia: Permafrost thaw and nitrogen release journal September 2017
Vegetation-soil-thaw-depth relationships along a low-arctic bioclimate gradient, Alaska: synthesis of information from the ATLAS studies journal January 2003
The transient layer: implications for geocryology and climate-change science journal January 2005
Information Theory and an Extension of the Maximum Likelihood Principle book January 1998
Alaska Palaeo-Glacier Atlas (Version 2) book January 2011
Digital soil mapping algorithms and covariates for soil organic carbon mapping and their implications: A review journal October 2019
Calcium-rich tundra, wildlife, and the “Mammoth Steppe” journal January 2001
Algorithms for quantitative pedology: A toolkit for soil scientists journal March 2013
Distribution of carbon and nitrogen along hillslopes in three valleys on Herschel Island, Yukon Territory, Canada journal July 2019
The principles of cryostratigraphy journal August 2010
Spatial patterns of soil organic carbon on hillslopes: Integrating geomorphic processes and the biological C cycle journal January 2006
Soil carbon distribution in Alaska in relation to soil-forming factors journal November 2011
Small-scale spatial patterns of soil organic carbon and nitrogen stocks in permafrost-affected soils of northern Siberia journal November 2018
Modeling deep soil properties on California grassland hillslopes using LiDAR digital elevation models journal March 2016
Cryostratigraphy of late Pleistocene syngenetic permafrost (yedoma) in northern Alaska, Itkillik River exposure journal May 2011
Arctic patterned-ground ecosystems: A synthesis of field studies and models along a North American Arctic Transect journal January 2008
Soils and frost boil ecosystems across the North American Arctic Transect journal January 2008
Simulating nonsorted circle development in arctic tundra ecosystems journal July 2008
Introduction to special section on Biocomplexity of Arctic Tundra Ecosystems journal January 2008
Cryogenesis and soil formation along a bioclimate gradient in Arctic North America journal January 2008
Characteristics of cryogenic soils along a latitudinal transect in arctic Alaska journal November 1998
Climate change and the permafrost carbon feedback journal April 2015
Permafrost is warming at a global scale journal January 2019
Large stocks of peatland carbon and nitrogen are vulnerable to permafrost thaw journal August 2020
Permafrost carbon feedbacks threaten global climate goals journal May 2021
Multiple Comparisons Using Rank Sums journal August 1964
Use of Ranks in One-Criterion Variance Analysis journal December 1952
Variability of Active-layer Thickness at Multiple Spatial Scales, North-central Alaska, U.S.A. journal May 1999
Landscape variation in soil carbon stocks and respiration in an Arctic tundra ecosystem, west Greenland journal January 2018
Land cover and landform-based upscaling of soil organic carbon stocks on the Brøgger Peninsula, Svalbard journal January 2019
Elevation-based upscaling of organic carbon stocks in High-Arctic permafrost terrain: a storage and distribution assessment for Spitsbergen, Svalbard journal January 2017
Large, climate-sensitive soil carbon stocks mapped with pedology-informed machine learning in the North Pacific coastal temperate rainforest journal January 2019
Spatial heterogeneity and environmental predictors of permafrost region soil organic carbon stocks journal February 2021
A late Pleistocene glacial chronology for the southern Brooks Range: Stratigraphic record and regional significance journal January 1982
Cryostructures in permafrost, Tuktoyaktuk coastlands, western arctic Canada journal April 1994
Air-photo analysis and summary of landform soil properties along the route of the trans-Alaska pipeline system report January 1982
Building Predictive Models in R Using the caret Package journal January 2008
ranger : A Fast Implementation of Random Forests for High Dimensional Data in C++ and R journal January 2017
Nonlinear Regression Models and Applications in Agricultural Research journal January 2015
Sampling Protocols for Permafrost-Affected Soils journal January 2013
Modeling Soil–Landscape and Ecosystem Properties Using Terrain Attributes journal January 2000
Cryoturbation and Carbon Stocks in Gelisols under Late‐Successional Black Spruce Forests of the Copper River Basin, Alaska journal November 2019
Permafrost Sub-grid Heterogeneity of Soil Properties Key for 3-D Soil Processes and Future Climate Projections journal August 2016
Soil Pedon Carbon and Nitrogen Data for Alaska: An Analysis and Update journal January 2013
Estimated stocks of circumpolar permafrost carbon with quantified uncertainty ranges and identified data gaps journal January 2014

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