Effect of Terrain Characteristics on Soil Organic Carbon and Total Nitrogen Stocks in Soils of Herschel Island, Western Canadian Arctic

Permafrost landscapes experience different disturbances and store large amounts of organic matter, which may become a source of greenhouse gases upon permafrost degradation. We analysed the influence of terrain and geomorphic disturbances (e.g. soil creep, active-layer detachment, gullying, thaw slumping, accumulation of fluvial deposits) on soil organic carbon (SOC) and total nitrogen (TN) storage using 11 permafrost cores from Herschel Island, western Canadian Arctic. Our results indicate a strong correlation between SOC storage and the topographic wetness index. Undisturbed sites stored the majority of SOC and TN in the upper 70 cm of soil. Sites characterised by mass wasting showed significant SOC depletion and soil compaction, whereas sites characterised by the accumulation of peat and fluvial deposits store SOC and TN along the whole core. We upscaled SOC and TN to estimate total stocks using the ecological units determined from vegetation composition, slope angle and the geomorphic disturbance regime. The ecological units were delineated with a supervised classification based on RapidEye multispectral satellite imagery and slope angle. Mean SOC and TN storage for the uppermost 1 m of soil on Herschel Island are 34.8 kg C m-2 and 3.4 kg N m-2, respectively. Copyright © 2015 John Wiley & Sons, Ltd.

[1]  A. Lewkowicz,et al.  Salinization of Permafrost Terrain Due to Natural Geomorphic Disturbance, Fosheim Peninsula, Ellesmere Island , 1999 .

[2]  H. Meyer,et al.  Origin and characteristics of massive ground ice on Herschel Island (western Canadian Arctic) as revealed by stable water isotope and Hydrochemical signatures , 2011 .

[3]  Vladimir E. Romanovsky,et al.  Exploring the sensitivity of soil carbon dynamics to climate change, fire disturbance and permafrost thaw in a black spruce ecosystem , 2010 .

[4]  L. Smith,et al.  Impacts of climate warming and permafrost thaw on the riverine transport of nitrogen and phosphorus to the Kara Sea , 2007 .

[5]  F. S. Chapin,et al.  Response to fertilization by various plant growth forms in an Alaskan tundra: nutrient accumulation and growth , 1980 .

[6]  R. Sletten,et al.  Spatial distribution of soil organic carbon in northwest Greenland and underestimates of high Arctic carbon stores , 2010 .

[7]  Susan E. Trumbore,et al.  Controls over carbon storage and turnover in high‐latitude soils , 2000, Global change biology.

[8]  J. Murton,et al.  Solifluction processes on permafrost and non‐permafrost slopes: results of a large‐scale laboratory simulation , 2008 .

[9]  Eric S. Kasischke,et al.  The role of fire in the boreal carbon budget , 2000, Global change biology.

[10]  Merritt R. Turetsky,et al.  Current disturbance and the diminishing peatland carbon sink , 2002 .

[11]  Trevor C. Lantz,et al.  Increasing rates of retrogressive thaw slump activity in the Mackenzie Delta region, N.W.T., Canada , 2008 .

[12]  Yinsuo Zhang,et al.  Permafrost and climate change at Herschel Island (Qikiqtaruq), Yukon Territory, Canada , 2009 .

[13]  T. Vinson,et al.  Carbon pools and accumulation in peatlands of the former Soviet Union , 1995 .

[14]  Charles D. Koven,et al.  Analysis of Permafrost Thermal Dynamics and Response to Climate Change in the CMIP5 Earth System Models , 2013 .

[15]  A. Lewkowicz,et al.  Frequency and magnitude of active‐layer detachment failures in discontinuous and continuous permafrost, northern Canada , 2005 .

[16]  G. Hugelius.  Spatial upscaling using thematic maps: An analysis of uncertainties in permafrost soil carbon estimates , 2012 .

[17]  Guido Grosse,et al.  Vulnerability of high‐latitude soil organic carbon in North America to disturbance , 2011 .

[18]  M. Jorgenson,et al.  Soil carbon and material fluxes across the eroding Alaska Beaufort Sea coastline , 2011 .

[19]  F. Chapin,et al.  Permafrost and the Global Carbon Budget , 2006, Science.

[20]  Dorothy Cooley,et al.  Expansion of Canopy-Forming Willows Over the Twentieth Century on Herschel Island, Yukon Territory, Canada , 2011, AMBIO.

[21]  K. Schaefer,et al.  The impact of the permafrost carbon feedback on global climate , 2014 .

[22]  B. Elberling,et al.  A new data set for estimating organic carbon storage to 3 m depth in soils of the northern circumpolar permafrost region , 2013 .

[23]  S. Lamoureux,et al.  Seasonal fluxes and age of particulate organic carbon exported from Arctic catchments impacted by localized permafrost slope disturbances , 2014 .

[24]  E. Schuur,et al.  Potential remobilization of belowground permafrost carbon under future global warming , 2010 .

[25]  Wayne H. Pollard,et al.  Fifty years of coastal erosion and retrogressive thaw slump activity on Herschel Island, southern Beaufort Sea, Yukon Territory, Canada , 2008 .

[26]  J. W. H. A R D E N,et al.  The role fire in the carbon budget , 1910 .

[27]  Hugh M. French,et al.  The Periglacial Environment , 1977 .

[28]  Corinne Le Quéré,et al.  Carbon and Other Biogeochemical Cycles , 2014 .

[29]  Peter Kuhry,et al.  Mapping the degree of decomposition and thaw remobilization potential of soil organic matter in discontinuous permafrost terrain , 2012 .

[30]  Y. Sheng,et al.  Short communication: a new dataset for estimating organic carbon storage to 3 m depth in soils of the northern circumpolar permafrost region , 2013 .

[31]  Kristopher D. Johnson,et al.  Field information links permafrost carbon to physical vulnerabilities of thawing , 2012 .

[32]  Hanno Meyer,et al.  Eastern Beringia and beyond: Late Wisconsinan and Holocene landscape dynamics along the Yukon Coastal Plain, Canada , 2012 .

[33]  P. Ciais,et al.  Permafrost carbon-climate feedbacks accelerate global warming , 2011, Proceedings of the National Academy of Sciences.

[34]  K. Beven,et al.  A physically based, variable contributing area model of basin hydrology , 1979 .

[35]  Peter Kuhry,et al.  High‐resolution mapping of ecosystem carbon storage and potential effects of permafrost thaw in periglacial terrain, European Russian Arctic , 2011 .

[36]  J. Canadell,et al.  Soil organic carbon pools in the northern circumpolar permafrost region , 2009 .

[37]  Jeannette Noetzli,et al.  Permafrost thermal state , 2011 .

[38]  M. Simpson,et al.  Evidence for the enhanced lability of dissolved organic matter following permafrost slope disturbance in the Canadian High Arctic , 2011 .

[39]  P. Birkeland,et al.  Soils and Geomorphology , 1984 .

[40]  J. Canadell,et al.  The Northern Circumpolar Soil Carbon Database: spatially distributed datasets of soil coverage and soil carbon storage in the northern permafrost regions , 2012 .

[41]  Surface-Applied Urea.  NITROGEN LOSS FROM , 1970 .

[42]  D. Vitt,et al.  Fossil Carbon/Nitrogen Ratios as a Measure of Peat Decomposition , 1996 .

[43]  E. Pfeiffer,et al.  Organic carbon and total nitrogen stocks in soils of the Lena River Delta , 2012 .

[44]  A. Lewkowicz,et al.  LATE-SUMMER SOLIFLUCTION AND ACTIVE LAYER DEPTHS, FOSHEIM PENINSULA, ELLESMERE ISLAND, CANADA , 1998 .

[45]  T. Tyrrell,et al.  Morphology of Emiliania huxleyi coccoliths on the northwestern European shelf – is there an influence of carbonate chemistry? , 2014 .

[46]  B. Elberling,et al.  Improved Estimates Show Large Circumpolar Stocks of Permafrost Carbon While Quantifying Substantial Uncertainty Ranges and Identifying Remaining Data Gaps , 2014 .

[47]  C. Jones,et al.  Estimating the Permafrost-Carbon Climate Response in the CMIP5 Climate Models Using a Simplified Approach , 2013 .

[48]  T. E. Osterkamp,et al.  The effect of permafrost thaw on old carbon release and net carbon exchange from tundra , 2009, Nature.

[49]  Jeremy B. Jones,et al.  Nitrogen loss from watersheds of interior Alaska underlain with discontinuous permafrost , 2005 .

[50]  M. Mack,et al.  Effects of thermo-erosional disturbance on surface soil carbon and nitrogen dynamics in upland arctic tundra , 2014 .

[51]  A. Zhu,et al.  Mapping soil organic matter using the topographic wetness index: A comparative study based on different flow-direction algorithms and kriging methods , 2010 .

[52]  Rudolf Richter,et al.  Atmospheric correction of satellite data with haze removal including a haze/clear transition region , 1996 .

[53]  J. Bockheim.  Importance of Cryoturbation in Redistributing Organic Carbon in Permafrost‐Affected Soils , 2007 .

[54]  F. Chapin,et al.  Influence of disturbance on carbon exchange in a permafrost collapse and adjacent burned forest , 2007 .

[55]  J. Kimble,et al.  Carbon Storage and Distribution in Tundra Soils of Arctic Alaska, U.S.A. , 1996, Arctic and Alpine Research.

[56]  P. Roos,et al.  Activation of old carbon by erosion of coastal and subsea permafrost in Arctic Siberia , 2012, Nature.

[57]  Hanno Meyer,et al.  Modern and Late Holocene Retrogressive Thaw Slump Activity on the Yukon Coastal Plain and Herschel Island, Yukon Territory, Canada , 2012 .

[58]  D. McNally,et al.  Arctic permafrost active layer detachments stimulate microbial activity and degradation of soil organic matter. , 2010, Environmental science & technology.

[59]  G. Hugelius,et al.  Landscape partitioning and environmental gradient analyses of soil organic carbon in a permafrost environment , 2009 .

[60]  Vladimir E. Romanovsky,et al.  Permafrost thermal state in the polar Northern Hemisphere during the international polar year 2007–2009: a synthesis , 2010 .

[61]  P. Meyers.  Preservation of elemental and isotopic source identification of sedimentary organic matter , 1994 .

[62]  G. Hugelius,et al.  Soil organic carbon pools in a periglacial landscape: a case study from the central Canadian Arctic , 2010 .

[63]  J. Seibert,et al.  On the calculation of the topographic wetness index: evaluation of different methods based on field observations , 2005 .

[64]  N. Matsuoka,et al.  Solifluction rates, processes and landforms: a global review , 2001 .